Linux Linux overviewoverview

Architecture

Kernel Filesystem

Shell: Korn, Bourne, C, Bash

X Windows: Motif, Open Look, X.Org

Desktop: Gnome, KDE,etc

Characteristics

multiuser multitask, multithread concurrency built-in networking (NFS) 32/64 - bit OS UNIX like Intel, Mac, Mainframes

Graphical user interface Visual tour of the GNOME Desktop

Desktop System Settings Search local Software Center File Manager Text Editor Terminal

Some applications Internet

Firefox Thunderbird gFTP

Libre Office Word processor Spreadsheet Presentation

Tools Screen capture PDF viewer Graphical editor Calendar/organizer

Linux at the shell prompt

You need to open a terminal System prompts

Korn, Bash and Bourne Shells: $ C Shell: % (root #) Linux: uses the bash shell

Commands login, logout news, passwd, who, finger, talk man (basic help) to interrupt Ctrl-C cat, more

Files and directories

File concepts filenames: up to 14 digits, one word including _ and .

e.g.: test_program and sales.report.1 case sensitive bold is not BOLD types: ordinary, directories, special devices and links pathnames: /home/abento/select.html

common names: usr, users, bin, etcfull and relative

Basic file commands in Linux How to obtain a directory listing: ls and ls -al How to create, remove, change to, and present working

directory: mkdir , rmdir , cd , pwd. How to copy, move, delete, type: cp , mv , rm -i , cat

Reading a directory output

permis links Owner Group size date time filename -rwxr-xr-x 1 abento faculty 95 Aug 2 14:13 UBmail*-rw------- 1 abento faculty 4294 Mar 2 1995 Wp60lrwxr-xr-x 1 root sys 42 Aug 3 09:11 SoftWindows-rwx------ 1 abento faculty 32802 Oct 16 17:56 Xdefaults.swin*drwx--x--x 3 abento faculty 512 Aug 21 12:20 ais.dir/drwxr-xr-x 2 abento faculty 512 Aug 3 09:11 axhome/drwxr-xr-x 3 abento faculty 512 Sep 18 14:54 dumpster/-rwx--x--x 1 abento faculty 1179748 Aug 23 14:00 hcl95.hlp*-rw------- 1 abento faculty 312652 Jun 21 16:05 lviewp1b.zipdrwx------ 2 abento faculty 512 Aug 3 09:11 mail/-rw------- 1 abento faculty 957 Jun 16 17:00 osref.booksdrwxr--r-- 8 abento faculty 512 Aug 3 09:11 pub/drwx------ 9 abento faculty 512 Aug 3 09:11 root/-rw------- 1 abento faculty 2162 Oct 18 17:09 select.html

File type: - ordinary, d directory, l symbolic link, b block, c special character, p piped.

Permissions: r read, w write, x execute (O, G,W)

an example