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ECC Linux workshop (intro course)

ECC Linux workshop (intro course). WHAT WILL BE COVERED. UNIX/Linux Overview Red Hat Enterprise Linux How to Login Password Reset Applications Command Line Shell Commands and Create Text Files File Permissions Remote Access & File Transfer Security & ECC Policies. UNIX overview.

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ECC Linux workshop (intro course)

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  1. ECC Linux workshop (intro course)

  2. WHAT WILL BE COVERED • UNIX/Linux Overview • Red Hat Enterprise Linux • How to Login • Password Reset • Applications • Command Line • Shell Commands and Create Text Files • File Permissions • Remote Access & File Transfer • Security & ECC Policies

  3. UNIX overview • UNIX was developed in 1969 at Bell Labs. Originally used as a workbench for programmers to develop new software for testing. • Main Functions of UNIX: • - High performance • - Resource Sharing • - Multi-User Access • - Programming and Software Development

  4. Flavors of unix

  5. UNIX distributions • Open Source: • Linux, Minix, FreeBSD, OpenSolaris • Open & Closed Source: • Android • Closed Source: • MacOS X, Solaris, AIX, HP-UX

  6. LINUX • Linus Torvalds developed the Linux kernel in 1991. • Collaborated with the GNU Project in 1992, to create the first free operating system for the public. • Many distributions of Linux include Debian, Fedora, Mandriva, SUSE, Slackware, and Android • Most distributions are free for use, some are NOT

  7. Advantages of a Linux OS • Hardware/Software • High Compatibility • Resource Allocation/Sharing • Flexibility • Security • Very few Viruses • Encryption • Dynamic Firewall • Choice • Complete Control • Open Source Software • Scripting and Automation • Experimentation

  8. RED HAT ENTERPRISE LINUX • Enterprise level operating system • Trademark and Support are NOTfree • CentOS, Fedora and Scientific Linux are free versions of RHEL

  9. Centos 6 • http://www.centos.org/ • A free, community supported enterprise OS. • Exact replica of Red Hat Enterprise Linux 6

  10. ECC-UNIX ACCOUNT • ALL ENGINEERING STUDENTS, USING LINUX SYSTEMS OR APPLICATIONS WILL NEED AN ECC-UNIX ACCOUNT • NEW USERS WILL NEED TO APPLY FOR ECC-UNIX ACCOUNTS AT THE ECC LAB FRONT DESK • COUGAR ID CARD MUST BE PRESENT WHEN APPLYING FOR AN ECC-UNIX ACCOUNT • ONLY ENGINEERING AFFILIATED STUDENTS AND FACULTY ARE ALLOWED TO OPEN AN ECC-UNIX ACCOUNT • ANY NON ENGINEERING STUDENTS OR FACULTY MUST BE SPONSORED TO OBTAIN ANECC-UNIX ACCOUNT • ECC UNIX ACCOUNTS WILL NOW BE USING COUGARNET PASSWORD AUTHENTICATION.

  11. Switch to cougarnet authentication • Starting Fall 2014 • COUGARNET ACCOUNT PASSWORDS WILL BE USED TO LOGIN TO ALL ENGINEERING LINUX SYSTEMS • NEW USERS WILL STILL NEED TO CREATE A ECC-UNIX ACCOUNT USERNAME • ALL ACCOUNT PASSWORDS WILL HAVE TO BE RESET BY UofH CENTRAL IT.

  12. HOW TO LOGIN • OPEN X-WIN 32 FROM START MENU • CONFIGURE X-WIN 32: • New Connection “Manual” • Choose ‘XDMCP’ • ‘General’ tab • Connection Name: tuxedo • XDMCP mode: Query • HOST: tuxedo.egr.uh.edu • Hit ‘Save’ • Hit ‘Launch’ • USE ECC UNIX/CougarNet ACCOUNT TO LOGIN

  13. RESET PASSWORD (online) • GO TO: http://www.uh.edu/infotech/ • Click “Password Reset” • Enter security information • On CougarNet • Click “Reset”

  14. NAGIVATE THE GUI (GRAPHICAL USER INTERFACE) • Applications • Accessories • word processing • System tools • Command line (terminal) • Places • Home folder • Subdirectories • Search for files • System • Preferences • Administration Utilities • System Documentation

  15. APPLICATIONS • Firefox • Web Browser • LibreOffice • Open source version of Microsoft Word, Excel, and PowerPoint • Terminal • Command line shell prompt • Faster than GUI • Text Editors • EMACS • Gedit • VI/ VIM/ NANO (command line)

  16. Class software location • Location:/usr/local • Software: MATLAB, Abacus, Fluent, Cadence, Comsol, etc…

  17. ACCESS THE COMMAND LINE PROMPT • Applications  System tools  Terminal • Fully text based command prompt • Shell prompt • [ username@<hostname> <current working directory>] $

  18. USING SIMPLE SHELL COMMANDS • Navigation: • ls – list directory contents • ls –l - view files and permissions • pwd – print, current working directory • cd – change directory • cd <directory path> • Ex. (to go to user home directory) • [user]$ cd /home/user or cd ~ • Copying, Moving, and Deleting • cp – copy files and directories • cp <file source> <file destination> • mv – move or rename file • mv <file source> <file destination> • touch – make basic text files • touch <file name> • mkdir – create a directory • mkdir <directory file path> • rm – delete a file (can be destructive) • rm <file path> • rmdir – delete directory (empty directory) • rmdir <file path>

  19. SHELL COMMANDS (continued) • Search commands: • find – search for files • Find <sourse directory> -name <name of file or directory> -print • Documentation: • man – manual pages • man <command or application> • Change File Permissions: • chown – change file owner and group • chownowner:group <file path> • chgrp <groupname> <file path> • System commands: • top – show current processes that are running • df –h: show the file system disk space usage • w : show users currently logged on to the system • uptime : show date, load average, and # of users • uname –a : show current OS version and computer hostname • Network Statistics • Ifconfig : show IP address information • netstat –rn : show IP routing information

  20. Create & EDITING TEXT FILES • VIM • vim <edit file name or new file create> • NANO • Nano <file> • EMACS • GUI text editor

  21. FILE PERMISSIONS • drwxrwxrwx • First character: • d = directory (blue) • l = symbolic link (cyan) • ‘-’ = a file (white) • rwx permissions: • R = read • W = write • X = execute • First set: owner • Second set: group • Third set: everyone

  22. REMOTE ACCESS • SSH – Secure Shell client • Aprogram used for “shell” access to a remote system. • Login using UNIX/Linux terminal (shell), or through “PUTTY” • Use ECC UNIX account info to login • PUTTY (for Windows Users) • Free application • Allows shell logins from a windows desktop

  23. Remote access (cont) • SSH from PUTTY: • Open PUTTY app from Windows • Type the hostname or IP of destination • Port is always 22 • Enter ECC-UNIX user ID, and password • If successful, user command prompt will be shown • SSH from another terminal (shell): • Type command: ssh <username>@<hostname>

  24. file Transfer • WinSCP: • Transfer files from Windows to • Linux and vice versa • Download WinSCP from • “software download” section on • Access UH • Login: • Open WinSCP program • Enter user credentials, click login

  25. SECURTIY & ECC POLICIES • ECC website • http://ecc.egr.uh.edu/engineering-computing-center-policies • ECC Usage Policy • http://ecc.egr.uh.edu/sites/ecc.egr.uh.edu/files/files/cce_policy_computing.pdf

  26. Security • DO NOT, give anyone your password • DO NOT, let anyone use your ECC-UNIX account • All activity is being tracked and logged, including command history. • Report any suspicious activity to anyone mentioned below. • Kiet Luong Zain Marvi Manjunatha Shenoy • Engineering IT Director / Systems Administrator 1 Systems Administrator 2 • Information Security Officer Email:zhmarvi@uh.edu Email: mshenoy@uh.edu • Email: KietL@uh.edu

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