Linux CentOS

* setuid (Set User ID) → asignación a nivel de usuario Este bit es asignable a ficheros ejecutables, de manera que al ser ejecutado el fichero por un usuario este se ejecuta con los permisos del propietario, pero no del usuario que lo ha ejecutado, es decir, sería equivalente a si lo hubiera ejecutado el propietario. Activación: sumar 4000 al permiso actual ( ) = 4755 con chmod → activar / desactivar chmod u+s /sbin/fdisk ) chmod u-s /sbin/fdisk, Juan Tonda (marzo 2022) Pg. 8 Guía Linux * setgid (Set Group ID) → asignación a nivel de grupo Activación: sumar 2000 al permiso actual (644) = 2644 con chmod → activar / desactivar chmod o+s nombre_fichero ) chmod g-s nombre_fichero * persistencia (Sticky Bit). → asignación a nivel directorio (desfasada en ficheros normales) Activación: sumar 1000 al permiso actual (644) = 2644 con chmod → activar / desactivar chmod o+t nombre_fichero ) chmod o-t nombre_fichero Ejemplo: ls -ld /tmp Sin embargo, la aplicación a nivel de directorio sí se sigue haciendo y esta aplicación no permite que un fichero sea borrado del directorio o modificado salvo si eres su propietario o si eres el superusuario.

Abstrak Dijaman modern seperti sekarang, banyak sekali perusahaan yang memanfaatkan teknologi informasi. Salah satunya adalah PT.Infomedia Nusantara, Server sebagai penyedia layanan pada jaringan komputer memiliki peranan penting diperusahaan, perusahaan memiliki sertifikat ISO 9001 karena telah diakui memiliki standar internasional. Diantara lain, memiliki lisensi Structured Query Language (SQL) dan Operating System (OS) pada servernya sebagai salah satu penilaian mutu pada perusahaan tersebut. Harga lisensi sangatlah mahal jika perusahaan memiliki server yang sangat banyak, maka akan membebankan perusahaan dengan biaya yang sangat besar. Pada Proyek Akhir ini telah dibangun sebuah database server dengan memanfaatkan database management system (DBMS) MariaDB dan OS Linux CentOS yang berbasis open source yang sudah diimplementasikan di PT.Infomedia Nusantara. Hasil uji Proyek Akhir ini, disimpulkan bahwa performa database memenuhi kebutuhan perusahaan dengan uji performa dan dari ha...

ABSTRAK iv TABLE OF CONTENTS v LIST OF TABLES viii LIST OF FIGURES ix LIST OF ABBREVIATIONS xiv LIST OF APPENDICES xv 1 vi 2.4 Data Layers 2.5 Device Files 2.6 Unused Disk Areas 2.7 Host Protected Area 2.8 The Extended File System 2.9 Existing Guidelines 2.9.1 Guide to Integrating Forensic Techniques into Incident response 2.9.2 Forensic Examination of Digital Evidence: A Guide for First Responders, Second Edition 2.9.3 Forensic Examination of Digital Evidence: A Guide for Law Enforcement 2.9.4 Good Practice Guide for Computer-Based Electronic Evidence v4 2.9.5 New Technologies Incorporated, Computer Evidence Processing Steps 2.9.6 Computer Security Incident Handling Guide 2.9.7 SWGDE Guidelines 2.10 Linux Forensic Tools 2.10.1 General Command Line Utilities 2.10.2 The gparted Command 2.10.3 The hdparm Command 2.10.4 The badblocks Command 2.10.5 The dd Command 2.10.6 The fdisk Command 2.10.7 The mawk Command 2.10.8 The md5sum, sha1sum and sha256sum Commands 2.10.9 The grep Command 2.10.10 The find Command 2.10.11 The ls Command 2.11 The Sleuth Kit Tools 2.11.1 Non-categorized Tools 2.11.2 The File System Layer vii 2.11.3 The Content Layer Tools 2.11.4 The Metadata Layer Tools 2.11.5 The File Name Layer Tools 2.11.6 The Application Layer Tools 2.11.7 The sigfind Tool 2.12 Caine Live Cd RESEARCH METHODOLOGY

ABSTRAK iv TABLE OF CONTENTS v LIST OF TABLES viii LIST OF FIGURES ix LIST OF ABBREVIATIONS xiv LIST OF APPENDICES xv 1 vi 2.4 Data Layers 2.5 Device Files 2.6 Unused Disk Areas 2.7 Host Protected Area 2.8 The Extended File System 2.9 Existing Guidelines 2.9.1 Guide to Integrating Forensic Techniques into Incident response 2.9.2 Forensic Examination of Digital Evidence: A Guide for First Responders, Second Edition 2.9.3 Forensic Examination of Digital Evidence: A Guide for Law Enforcement 2.9.4 Good Practice Guide for Computer-Based Electronic Evidence v4 2.9.5 New Technologies Incorporated, Computer Evidence Processing Steps 2.9.6 Computer Security Incident Handling Guide 2.9.7 SWGDE Guidelines 2.10 Linux Forensic Tools 2.10.1 General Command Line Utilities 2.10.2 The gparted Command 2.10.3 The hdparm Command 2.10.4 The badblocks Command 2.10.5 The dd Command 2.10.6 The fdisk Command 2.10.7 The mawk Command 2.10.8 The md5sum, sha1sum and sha256sum Commands 2.10.9 The grep Command 2.10.10 The find Command 2.10.11 The ls Command 2.11 The Sleuth Kit Tools 2.11.1 Non-categorized Tools 2.11.2 The File System Layer vii 2.11.3 The Content Layer Tools 2.11.4 The Metadata Layer Tools 2.11.5 The File Name Layer Tools 2.11.6 The Application Layer Tools 2.11.7 The sigfind Tool 2.12 Caine Live Cd RESEARCH METHODOLOGY

The number of internet users academics Faculty of Science and Mathematics University of Diponegoro via wireless is increasing, therefore it is necessary to Hotspot Billing can help network administrators to manage. Hotspot Billing is interactive, so users do not have contact hotspot with the administrator directly. Users can manage their account, obtain statistical information, and can complain to an administrator with easy access via the web and sms. This Software was built using a programming language Hypertext Preprocessor (PHP) and MySQL database management system that is integrated with the Remote Authentication Dial-In User Service (RADIUS) Server, and supported by the SMS Gateway.

The purpose of the Workshop on Creating Cloud Storage using OwnCloud X on Ubuntu Server is to increase insight and knowledge to participants who come from students of SMK Multi Karya Medan.Ubuntu Server and Cloud Computing is a discussion that is often discussed at this time. From the results of the training, participants have been able to install their own Ubuntu Server, Web Server, PHP and Create OwnCloud.

There are several devices in a communication network: switches, routers, firewalls and servers; the latter ensuring the operation of network services. These services are installed by network administrators, using a large number of tools and a degree of specialization for correct configuration. When a problem arises in services, detection, diagnosis and subsequent solution will depend on the availability of those responsible for administering the network, solution that could take some time. If some of these services fail, would result in the inoperability of the service provided, causing user dissatisfaction. This research aims to develop an automatic recovery system of servers performing remote and unattended reinstallation for the improvement of the services of the network of data of the Rectorate of the University of the Andes Merida-Venezuela. Using various applications such as remote file systems, network autoconfiguration protocol, file transfer protocol, among others, to help optimize the services of communications networks, using the existing network infrastructure. This research work was part of a field research, the data were collected directly from the place where the events were going on. It is also, is a documentary research support for the review of printed documents was necessary and digitized primary sources concerning the fundamentals of internet services, open source communication protocols, operating systems, among others. The results indicate a stable performance for both GNU/Linux in networking applications and for network communications regardless of operating system used. In addition, the system SIRAS allowed improve network services. It also showed that the hardware that hosts the recovery system, was not affected in performance when running concurrently all applications and network protocols involved in the system.

En una red coexisten diversos dispositivos de comunicacion tales como switch (conmutadores), routers (enrutadores), firewall y los servidores; estos ultimos garantizan el funcionamiento de los servicios de una red que son instalados por los administradores de redes, utilizando para ello un elevado numero de herramientas y requiriendo un elevado grado de especializacion para su correcta configuracion. Cuando surge un problema en los servicios, la deteccion, diagnostico y posterior solucion dependeran de la disponibilidad de los encargados de administrar la red de datos, solucion que podria tardar algun tiempo. Si algunos de estos servicios dejan de funcionar, traeria como consecuencia la inoperatividad del servicio prestado, provocando el descontento de los usuarios. En el presente articulo, se desarrolla un sistema de recuperacion automatico de servidores (SIRAS) realizando reinstalacion remota y desatendida para el mejoramiento de los servicios de la Red de Datos del Rectorado la U...

Snapshot makes a copy of current working system. Creating a snapshot with some processing and overheads is important to provide the reliable data service during backup. There are two types of snapshot techniques: volume-based approach and system-based approach. The volume-based Logical Volume Manager provides compact space usability, but requires some space to save snapshot and makes system with extra overheads. The system-based Snapshot works better than volume based. The file system based Snapshot does not need reserve space for snapshot. Therefore, the system-based Snapshot is considered a good solution in the computer environment where large-scale space management capability is not that critical. However, such snapshot feature is available in Linux kernel 2.2, 2.6 in EXT3 file system. In this paper, we proposed a system-based snapshot for the ext4 system in Linux kernel 2.6 or higher. The main Computer Engineering and Intelligent Systems www.iiste.org

el año 2011 trabajando para definir y mejorar un Proceso Unificado de Recuperación de Información (PURI)[1]. Éste trabajo inicial se extendió para adaptarlo y aplicarlo tanto a Smart-phones como a Sistemas Distribuidos. Durante el desarrollo de este proceso se detectaron aspectos de informática forense con fuertes carencias de herramientas y técnicas, que fueron llamados "nichos carentes"[2]. Múltiples proyectos finales de alumnos de la universidad FASTA se enfocaron en estos aspectos a fin de brindar soluciones a estas necesidades[3][4].

La proliferacion de entornos distribuidos en la informatica ha generado un cambio de paradigma que influye practicamente en todas las actividades asociadas, incluso la informatica forense. El Grupo de Investigacion de Sistemas Operativos e Informatica Forense de la Facultad de Ingenieria de la Universidad FASTA ha desarrollado un Proceso Unificado de Recuperacion de Informacion (PURI) que sirve de guia, tanto a informaticos forenses como operadores judiciales, en los pasos a seguir para recuperar la informacion almacenada digitalmente en un equipo de computacion. Se presenta en este trabajo una propuesta de los pasos a seguir por los informaticos forenses en el caso particular de encontrarse con un arreglo de discos RAID, del que se desconoce su estructura, al cual se le debe realizar una pericia.

Abstrak Dijaman modern seperti sekarang, banyak sekali perusahaan yang memanfaatkan teknologi informasi. Salah satunya adalah PT.Infomedia Nusantara, Server sebagai penyedia layanan pada jaringan komputer memiliki peranan penting diperusahaan, perusahaan memiliki sertifikat ISO 9001 karena telah diakui memiliki standar internasional. Diantara lain, memiliki lisensi Structured Query Language (SQL) dan Operating System (OS) pada servernya sebagai salah satu penilaian mutu pada perusahaan tersebut. Harga lisensi sangatlah mahal jika perusahaan memiliki server yang sangat banyak, maka akan membebankan perusahaan dengan biaya yang sangat besar. Pada Proyek Akhir ini telah dibangun sebuah database server dengan memanfaatkan database management system (DBMS) MariaDB dan OS Linux CentOS yang berbasis open source yang sudah diimplementasikan di PT.Infomedia Nusantara. Hasil uji Proyek Akhir ini, disimpulkan bahwa performa database memenuhi kebutuhan perusahaan dengan uji performa dan dari ha...

Cloud computing has emerged as a popular paradigm and an attractive model for providing a reliable distributed computing model.it is increasing attracting huge attention both in academic research and industrial initiatives. Cloud deployments are paramount for institution and organizations of all scales. The availability of a flexible, free open source cloud platform designed with no propriety software and the ability of its integration with legacy systems and thirdparty applications is fundamental. Open stack is a free and opensource software released under the terms of Apache license with a fragmented and distributed architecture making it highly flexible. This project was initiated and aimed at designing a secured cloud infrastructure called BradStack, which is built on OpenStack in the computing Laboratory at the University of Bradford. In this report, we present and discuss the steps required in deploying a secured BradStack Multi-node cloud infrastructure and conducting Penetration testing on OpenStack Services to validate the effectiveness of the security controls on the BradStack platform. This report serves as a practical guideline, focusing on security and practical infrastructure related issues. It also serves as a reference for institutions looking at the possibilities of implementing a secured cloud solution.

Through this article which concerns the implementation of the Moodle e-learning platform in a server, we will first present an example of a Web server architecture, then we propose the adopted architecture which is based on Linux containers. Afterwards, we propose a description of all the necessary tools chosen for the implementation of the platform in a Web server. Then, we propose through figures the installation of the different technological tools and the Moodle platform. Finally, we propose the configuration of our Moodle platform according to our needs.

Perkembangan teknologi yang Semakin hari semakin meningkat, kita di tuntut untuk meningkatkan system keamanan jaringan yang kita miliki, karena semakin mudahnya  orang bisa mengetahui tentang hacking dan cracking dan juga didukung oleh tools yang mudah didapatkan secara gratis. Dan untuk mencegah hal itu kita harus megamankan jaringan yang kita gunakan, untuk mengamankan jaringan tersebut peneliti menggunakan sebuah  metode keamanan yang bernama Intrusion Prevention System (IPS), merupakan media yang banyak digunakan dalam membangun sebuah system keamanan komputer, lalu IPS di gabungkan dengan menggunkan Teknik firewall dan metode Intrusioan Detection System, dalam penelitian ini penulis menggunakan sistem operasi Linux yaitu Ubuntu dan CentOS, karena linux merupakan software yang bersifat free/opensource sehingga untuk memperolehnya dapat diunduh secara gratis. Pada awalnya linux merupakan system operasi yang cocok untuk jaringan tapi sekarang linux sudah berubah menjadi system ope...

Modern cloud services have complex architectures, often comprising many software components, and depend on hundreds of configurations parameters to function correctly, securely, and with high performance. Due to the prevalence of open-source software, developers can easily deploy services using third-party software without mastering the configurations of that software. As a result, configuration errors (i.e., misconfigurations) are among the leading causes of service disruptions and outages. While existing cloud automation tools ease the process of service deployment and management, support for detecting misconfigurations in the cloud has not been addressed thoroughly, likely due to the lack of frameworks suitable for consistent parsing of unstandardized configuration files. This paper introduces ConfEx, a framework that enables discovery and extraction of text-based software configurations in the cloud. ConfEx uses a novel vocabulary-based technique to identify configuration files ...

En l'ambit bioinformatic, l'experimentacio es realitza a traves de sequencies d'execucions d'aplicacions, cada aplicacio utilitza com a arxiu d'entrada el generat per l'aplicacio anterior. Aquest proces d'analisi format per una llista d'aplicacions descrivint una cadena de dependencia es diu Workflow. Dues caracteristiques rellevants dels workflows bioinformatics, fan referencia al maneig de grans volums de dades i de la complexitat de les dependencies de dades. Molts dels gestors de recursos actuals, ignoren la ubicacio dels arxius, aixo implica un elevat cost si els elements de processament no estan propers als arxius i se'ls ha de moure. El model de graf dirigit aciclic (DAG), utilitzat per representar l'ordre d'execucio dels treballs del workflow, no ajuda a establir la millor ubicacio dels arxius d'entrada o temporals per a una execucio eficient. La solucio per a aquest desafiament, pot ser la planificacio de recursos conscient de...

Penelitian ini bertujuan mengembangkan jaringan wireless pada area hotspot yang masih mempergunakan Wi-Fi Protected Access 2-Pre-Shared Key (WPA2-PSK) akan dikembangkan menjadi berbasis Remote Access Dial In User Service (RADIUS) sebagai user authentication yang aman dan user-friendly yang mampu membedakan user yang diizinkan dan tidak diizinkan. Di Universitas Widyatama setiap mahasiswa, dosen, dan karyawan dapat menggunakan layanan jaringan wireless yang ada dengan cara memasukkan password pada laptop, smartphone, tablet, dan perangkat lainnya yang mendukung penggunaan WPA2-PSK untuk melakukan user authentication. Tujuan utama penelitian ini adalah untuk mengembangkan jaringan wireless dengan menggunakan user authentication dalam melakukan koneksi jaringan wireless, meningkatkan keamanan serta kemudahan dalam penggunaan jaringan wireless, dan dapat menghasilkan kebijakan dan prosedur penggunaan akses jaringan wireless. Pada penelitian ini metode penelitian yang digunakan metode Ne...

Snapshot makes a copy of current working system. Creating a snapshot with some processing andoverheads is important to provide the reliable data service during backup. There are two types of snapshottechniques: volume-based approach and system-based ...

This paper provides evidence of a feature of Hard-Disk Drives (HDDs), that we call File System Genome. Such a feature is originated by the areas where (on the HDD) the file blocks are placed by the operating system during the installation procedure. It appears from our study that the File System Genome is a distinctive and unique feature of each individual HDD. In particular, our extensive set of experiments shows that the installation of the same operating system on two identical hardware configurations generates two different File System Genomes. Further, the application of sound information theory tools, such as min entropy, show that the differences between two File System Genome are considerably relevant. The results provided in this paper constitute the scientific basis for a number of applications in various fields of information technology, such as forensic identification and security. Finally, this work also paves the way for the application of the highlighted technique to other classes of mass-storage devices (e.g. SSDs, Flash memories).

In this study, problems arise due to the use of WPA2-based user authentication. Constraints faced in using WPA2 are difficult to distinguish between users of wireless network services that are permitted and not permitted. The purpose of this study is that each wireless network user at Bale Bandung University (UNIBBA) can be distinguished between users who are permitted and not permitted so that wireless networks become safe, comfortable and user-friendly. UNIBBA is one of the educational institutions in Bandung Regency, which makes wireless networks a standard facility provided to students, lecturers, and employees that can be accessed through mobile devices that support wireless networks. The research method used is the waterfall method. The results of this study created a web-based wireless network user authentication system using RADIUS that is safe and user-friendly, by testing on the RADIUS server side and web login form.

Penelitian ini bertujuan mengembangkan jaringan wireless pada area hotspot yang masih mempergunakan Wi-Fi Protected Access 2-Pre-Shared Key (WPA2-PSK) akan dikembangkan menjadi berbasis Remote Access Dial In User Service (RADIUS) sebagai user authentication yang aman dan user-friendly yang mampu membedakan user yang diizinkan dan tidak diizinkan. Di Universitas Widyatama setiap mahasiswa, dosen, dan karyawan dapat menggunakan layanan jaringan wireless yang ada dengan cara memasukkan password pada laptop, smartphone, tablet, dan perangkat lainnya yang mendukung penggunaan WPA2-PSK untuk melakukan user authentication. Tujuan utama penelitian ini adalah untuk mengembangkan jaringan wireless dengan menggunakan user authentication dalam melakukan koneksi jaringan wireless, meningkatkan keamanan serta kemudahan dalam penggunaan jaringan wireless, dan dapat menghasilkan kebijakan dan prosedur penggunaan akses jaringan wireless. Pada penelitian ini metode penelitian yang digunakan metode Ne...

Resumen. Con independencia del nombre que se le dé —informática como utility, informática autogestionable o informática autónoma—, la automatización será una de las constantes en cualquier gran estrategia TIC que se pretenda abordar en un futuro próximo. El presente ...

The growth of networking services has led to an increase of users using these services. Because of the limitation of network infrastructure, each physical server is typically used for deploying a networking service for a group of users. In this model, data is centrally stored; As a result, ensuring its privacy is a critical requirement. In current systems, an administrator could use access control mechanisms provided by operating systems to prevent illegal access. However, these solutions are difficult to deploy and operate. Because of this issue, the administrator has difficulty comprehensively handling data security issues in a shared environment. In this paper, we propose a new approach using virtualization concept for securing data in this shared environment. The approach has been successfully implemented in the Linux environment, and has shown positive results. It can properly solve data security problems in the shared environment and surmount the weaknesses found in current solutions.

The growth of networking services has led to an increase of users using these services. Because of the limitation of network infrastructure, each physical server is typically used for deploying a networking service for a group of users. In this model, data is centrally stored; As a result, ensuring its privacy is a critical requirement. In current systems, an administrator could use access control mechanisms provided by operating systems to prevent illegal access. However, these solutions are difficult to deploy and operate. Because of this issue, the administrator has difficulty comprehensively handling data security issues in a shared environment. In this paper, we propose a new approach using virtualization concept for securing data in this shared environment. The approach has been successfully implemented in the Linux environment, and has shown positive results. It can properly solve data security problems in the shared environment and surmount the weaknesses found in current solutions.

Original scientific paper This paper presents a performance evaluation of LVM (Logical Volume Manager) system under the Linux operating system. The presented work includes proposal of the mathematical modeling of file system access time with and without LVM option. A mathematical model is further validated for the case of 32bit Linux ext3 file system with kernel version 2.6, taking into consideration the comparison of a file system in two defined configurations, with and without LVM. We have created two LVM options, with the same capacity, but different in complexity of the internal structure. The performance is measured using the Postmark benchmarking software application that simulates workload of Internet mail server. We have defined three types of workloads, generally dominated by relatively small objects. Test results have shown that the best option is to use direct file system realization without applying LVM. Benchmark results are interpreted based on provided mathematical model of file system access time.

The growth of networking services has led to an increase of users using these services. Because of the limitation of network infrastructure, each physical server is typically used for deploying a networking service for a group of users. In this model, data is centrally stored; As a result, ensuring its privacy is a critical requirement. In current systems, an administrator could use access control mechanisms provided by operating systems to prevent illegal access. However, these solutions are difficult to deploy and operate. Because of this issue, the administrator has difficulty comprehensively handling data security issues in a shared environment. In this paper, we propose a new approach using virtualization concept for securing data in this shared environment. The approach has been successfully implemented in the Linux environment, and has shown positive results. It can properly solve data security problems in the shared environment and surmount the weaknesses found in current solutions.

Com o desenvolvimento de novas tecnologias e padrões, surgiram melhorias no que diz respeito à segurança de Redes. Este trabalho tem como proposta a análise e pesquisa da autenticação de usuários, com base em Servidores RADIUS, ainda na camada de enlace, tendo como finalidade além da segurança, a identificação individualizada e possibilidade de personalizar os serviços disponíveis na rede. Verifica-se que após estudos e práticas dos protocolos de Redes como EAP, 802.1x e RADIUS e apresentando resultados obtidos em experimentos realizados em laboratório, pode-se concluir que estes protocolos são flexíveis para várias aplicações de segurança de rede valorizando os mecanismos de autenticações feita pelo usuário.

BAB I PENDAHULUAN 2 dan melalui call center XL. XL juga menyediakan leased line dan pelayanan korporat yang termasuk Internet Service Provider (ISP) dan pelayanan Voice over Internet Protocol (VoIP). 1.1.2 Visi dan Misi Perusahaan Visi XL adalah "Menjadi penyedia jasa teknologi informasi dan komunikasi terpilih di seluruh Indonesia, baik bagi pelanggan individu maupun kalangan bisnis". Untuk mencapai visi tersebut XL menetapkan misi "Memberikan yang terbaik bagi pelanggan, baik dalam hal produk, layanan, teknologi dan value for money".

The growth of networking services has led to an increase of users using these services. Because of the limitation of network infrastructure, each physical server is typically used for deploying a networking service for a group of users. In this model, data is centrally stored; As a result, ensuring its privacy is a critical requirement. In current systems, an administrator could use access control mechanisms provided by operating systems to prevent illegal access. However, these solutions are difficult to deploy and operate. Because of this issue, the administrator has difficulty comprehensively handling data security issues in a shared environment. In this paper, we propose a new approach using virtualization concept for securing data in this shared environment. The approach has been successfully implemented in the Linux environment, and has shown positive results. It can properly solve data security problems in the shared environment and surmount the weaknesses found in current solutions.

Banyaknya penggunaan hotspot mengakibatkan adanya masalah-masalah yang terjadi pada jaringan. Antara lain tidak ada monitoring. Solusinya antara lain dengan menggunakan system hotspot RADIUS. Instalasi dengan menggunakan server khusus sebagai database untuk menampung id dan password. Sietem ini memungkinkan monitoring jaringan dikarenakan terdapat user id sebagai tiket masuk

Dengan ini saya menyatakan bahwa skripsi ini adalah karya ilmiah saya sendiri, bukan plagiat dari karya ilmiah yang ditulis oleh orang lain atau lembaga lain, dan semua karya ilmiah orang lain atau lembaga lain yang dirujuk dalam skripsi ini telah disebutkan sumber kutipannya serta dicantumkan di Daftar Pustaka.

Los sistemas GNU/Linux han llegado a un grado de madurez importante, que los hacen válidos para integrarlos en cualquier ambiente de trabajo, ya sea desde el escritorio del PC personal, hasta el servidor de una gran empresa. El objetivo principal de este curso es introducirnos en el mundo de la administración de los sistemas GNU/Linux. Aprenderemos cómo proporcionar desde GNU/Linux los servicios necesarios a diferentes ambientes de usuarios y máquinas. El campo de la administración de sistemas es enorme, hay muchas ...

Abstrak—Sistem absensi kehadiran dan jaringan internet merupakan dua hal yang berkaitan dengan teknologi yang umumnya pasti dibutuhkan pada tiap perusahan ataupun instansi. Umumnya pegawai setiap datang dan pulang diharuskan untuk melakukan absensi dengan datang ke mesin absensi dan melakukan absensi baik melalui fingerprint atau deteksi wajah, dimana proses itu terkadang memakan waktu untuk dapat masuk ke ruang kerja karena ruang kerja dan lokasi mesin absensi yang cukup jauh. Untuk membantu pegawai dalam melakukan 2 hal sekaligus yakni autentikasi wifi dan melakukan absensi kehadiran diperlukan sistem absensi dengan menggunakan jaringan wifi. Untuk menerapkan sistem autentikasi jaringan wifi yang cocok untuk kehadiran dibutuhkan sistem autentikasi yang langsung dapat menggunakan username dan password tanpa captive portal yang membutuhkan bantuan browseruntuk autentikasi. Maka untuk memenuhi kebutuhan itu dapat terselesaikan dengan memakai metode autentikasi WPA2 Enterprise, dimana...

Data dan informasi yang dikirim dan diterima semakin banyak seiiring dengan semakin berkembangnya perangkat telekomunikasi. Data dan informasi tersebut harus dapat diakses dari mana saja dan kapan saja dan membutuhkan kapasitas media penyimpanan yang besar sehingga diperlukan media penyimpanan yang dapat memenuhi kebutuhan dalam mengakses data tersebut seperti pemanfaatan cloud computing. Tujuan mengimplementasikan Cloud server menggunakan Raspberry yaitu dapat memberikan alternatif untuk memanfaatkan media penyimpanan bagi pengguna pribadi untuk mengakses data dari mana saja dan dan kapan saja serta dapat mengurangi resiko dari kehilangan data-data penting yang disebabkan karena kerusakan media penyimpanan konvensional. Raspberry bisa menjadi sebuah infrastruktur yang dapat membantudalam masalah penyimpanan data dengan mengoptimalkannya sebagai cloudserver. File yang disimpan dalam cloud server tidak hanya dapat diakses antara administrator dengan user saja melainkan juga dapat diakses antara user dengan user. Aplikasi cloud server menggunakan raspberry dapat membantu dalam mengakses data dan informasi dari mana saja dan kapan saja dan dapat memberikan alternatif media penyimpanan yang dapat digunakan untuk menyimpan data serta mengurangi resiko kehilangan data karena kerusakan media penyimpanan konvensional.

Abstrak—Sistem absensi kehadiran dan jaringan internet merupakan dua hal yang berkaitan dengan teknologi yang umumnya pasti dibutuhkan pada tiap perusahan ataupun instansi. Umumnya pegawai setiap datang dan pulang diharuskan untuk melakukan absensi dengan datang ke mesin absensi dan melakukan absensi baik melalui fingerprint atau deteksi wajah, dimana proses itu terkadang memakan waktu untuk dapat masuk ke ruang kerja karena ruang kerja dan lokasi mesin absensi yang cukup jauh. Untuk membantu pegawai dalam melakukan 2 hal sekaligus yakni autentikasi wifi dan melakukan absensi kehadiran diperlukan sistem absensi dengan menggunakan jaringan wifi. Untuk menerapkan sistem autentikasi jaringan wifi yang cocok untuk kehadiran dibutuhkan sistem autentikasi yang langsung dapat menggunakan username dan password tanpa captive portal yang membutuhkan bantuan browseruntuk autentikasi. Maka untuk memenuhi kebutuhan itu dapat terselesaikan dengan memakai metode autentikasi WPA2 Enterprise, dimana...

Technological developments have a positive effect on agencies and companies, one of which is the innovation of employee attendance registration using the internet network media. Employee attendance system model using internet network will certainly make it easier to control employee attendance. The internet network is an important part of every agency in helping its performance and can also be used as an attendance system. WPA2 Enterprise implementation is used as authentication using the provided email and password. Devices that have been connected to the network will automatically be recorded in the employee attendance system. The implementation of WPA2 Enterprise requires freeradius assistance in processing authentication data from employees which will then be verified again through LDAP, in this case UNESA uses Google LDAP. The attendance system by implementing WPA2 Enterprise has been tested by implementing the Technology Acceptance Model (TAM) method resulting in 43% answering...

Penelitian dilakukan di STMIK Dumai dimana permasalahan yang dijadikan dasar dalam penulisan ini adalah Proses Penyimpanan dengan Cloud Storage Pada Jaringan Lokal Agar Perpindahan File Dapat Di Lakukan Tanpa  Media Penyimpanan Eksternal dan Tanpa Kuota Internet. Perancangan, pembuatan, hingga pengimplementasian Cloud Storage pada jaringan lokal nirkabel untuk media perpindahan file dan sebagai media perpindahan file tanpa internet yang sangat membantu dan mempermudah proses transfer file dari dosen ke mahasiswa ataupun sebaliknya. Dimana server ini dirancang menggunakan Linux Ubuntu Server sebagai server cloud dan menggunakan Owncloud 10 sebagai program cloud yang bertujuan sebagai pendukung utama dalam rancang bangun server tersebut. Dengan adanya Cloud Storage Mahasiswa dan Dosen Menggunakan Owncloud Pada Jaringan Lokal Di Kampus STMIK Dumai, maka proses perpindahan file tidak lagi membutuhkan media penyimpanan eksternal dan internet . Kata kunci : Owncloud, Cloud storage, jaring...

Parallel I/O is a research area with growing importance in the world of High Performance Computing (HPC). For many years parallel I/O has been considered super computers "bottleneck" and this problem has increased, with the advent of major augments in computing power in modern computers, until it became an important subject to be considered at the parallel I/O research community, in order to meet the requirements of scientific applications using HPC. Parallel Input/Output configurations have a great influence on the performance and availability of an I/O System, as main goal was proposed "to Analyze parallel I/O settings to identify key factors influencing the performance and I/O availability for Scientific Applications running on a HPC cluster." In order to perform I/O configuration analysis a methodology is proposed, to identify I/O factors and assess their influence to different I/O configurations, consisting of three phases: Characterization, Setting and Evaluation. The methodology allows super computer analysis at many levels, as the scientific application, I/O libraries and architecture, from the I/O point of view. Experiments performed for different I/O configurations and results obtained indicate the complexity of I/O factors analysis and different influence degrees on I/O system performance. Finally, discussion about future work is given, as well as the design of a model that supports I/O system configuration process for parallel scientific applications. On the other hand, to identify and evaluate I/O factors associated with level of data availability, RADIC Fault Tolerant Architecture is proposed as an alternative to use.

The network administrator is a person who is responsible for managing computer networks. One of the duties of a network administrator is network monitoring because errors on the server and services running on the server cannot be known when it happened. This can be difficult if the administrator is far from a surveillance center. This situation can be fatal if there is an error on the server and suddenly the service from the server is not running properly without being noticed because the network administrator is not on the spot. By utilizing Prometheus and Grafana with a telegram notification system that uses a Linux-based server, network administrators can get information on server conditions and services running on the server quickly. The result obtained is a system that is able to assist network administrators in monitoring servers and services that are running on the server anytime and anywhere to keep servers and services running on the server stable even though the network ad...

Teknologi surat elektronik (e-mail) sudah menjadi suatu kebutuhan yang tidak bisa dipisahkan lagi bagi pengguna internet baik dalam ruang lingkup industri, pendidikan maupun instansi lainya. Untuk menjalankan surat elektronik dibutuhkan sebuah mail server yang akan mengatur penerimaan maupun pengiriman email tersebut. Pada saat sekarang ini begitu banyak mail server open source yang dapat digunakan untuk membuat mail sendiri. Pembuatan ini memanfaatkan teknologi cloud computing, namun banyak pihak yang tidak mengetahui bagaimana kinerja dari mail server yang mereka bangun tersebut. Tidak semua mail server akan bekerja secara maksimal jika di implementasikan kedalam jaringan cloud, karena masing-masing mail sever mempunyai kelebihan dan kekurangan. Mail server yang dibangun yaitu sendmail, qmail dan postfix. Mail server tersebut telah di uji dan dianalisa berdasarkan parameter-parameter qos(Quality of Service)pada procol imap dan pop3, availability, penggunaan resource, persentase penggunaan cpu dan persentase penggunaan memori. Hasil yang di peroleh yaitu sendmail lebih unggul dibandingkan dengan qmail dan postfix dari segi rata-rata delay yaitu 3ms pop3 dan 34,9ms imap, throughput 123kbps pop3 dan 16,363 kbps imap, persentase penggunaan cpu 0% dan persentase penggunaan disk 5%.

A network administrator has responsibility and important role in a computer network. Network security and its services depend on the treatment performed by the administrator. Network administrators who understand the workings of a computer network is needed to obtain the necessary computer networks. One of the obligations of the administrator is to monitor a network which can be done by using the system monitor. Monitoring system is a task to check the computer, operating system and services of computer network to keep the network always work in optimal conditions. In an effort to monitor the condition of the network, one of the technologies that can be used is the notification on twitter social media for providing information in real time to the administrator. Twitter is a social media that is very widely used, free, and secure. Moreover, the use of social media twitter experiencing rapid development. Therefore, the selection of twitter as a medium for the use of the notification i...

Questo technical report costituisce una guida per la creazione e manutenzione della catena modellistica CHIMBO-2020 sviluppata da ISAC a partire dal 2017. Le corse operative attualmente attive e generate quotidianamente con la attuale versione di questo sistema modellistico sono: - CHIMBO @ CNR - ISAC - CHIMBO @ ARPA Sicili