Linux overview Architecture Desktop Gnome KDE etc X








- Slides: 8

Linux overview

Architecture Desktop: Gnome, KDE, etc X Windows: Motif, Open Look, X. Org Shell: Korn, Bourne, C, Bash Kernel File system

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

Graphical user interface n Visual tour of the GNOME Desktop n n n n Desktop System Settings Search local Software Center File Manager Text Editor Terminal

Some applications n Internet n n Libre Office n n Firefox Thunderbird g. FTP Word processor Spreadsheet Presentation Tools n n Screen capture PDF viewer Graphical editor Calendar/organizer

Linux at the shell prompt You need to open a terminal l System prompts l Korn, Bash and Bourne Shells: n C Shell: % (root #) n Linux: uses the bash shell n l Commands login, logout n news, passwd, who, finger, talk n man (basic help) n to interrupt Ctrl-C n cat, more n $

Files and directories ò File concepts filenames: up to 14 digits, one word including _ and. e. g. : test_program and sales. report. 1 l case sensitive bold is not BOLD l types: ordinary, directories, special devices and links l pathnames: /home/abento/select. html tcommon names: usr, users, bin, etc tfull and relative l ò Basic file commands in Linux How to obtain a directory listing: ls and ls -al l How to create, remove, change to, and present working directory: mkdir , rmdir , cd , pwd. l How to copy, move, delete, type: cp , mv , rm -i , cat l

Reading a directory output an example permis links Owner -rwxr-xr-x -rw------lrwxr-xr-x -rwx-----drwx--x--x drwxr-xr-x -rwx--x--x -rw------drwx------rw------drwxr--r-drwx------rw------- 1 1 3 2 3 1 1 2 1 8 9 1 abento root abento abento abento Group faculty sys faculty faculty faculty size date 95 4294 42 32802 512 512 1179748 312652 512 957 512 2162 Aug Mar Aug Oct Aug Sep Aug Jun Aug Oct time 2 2 3 16 21 3 18 23 21 3 16 3 3 18 14: 13 1995 09: 11 17: 56 12: 20 09: 11 14: 54 14: 00 16: 05 09: 11 17: 00 09: 11 17: 09 filename UBmail* Wp 60 Soft. Windows Xdefaults. swin* ais. dir/ axhome/ dumpster/ hcl 95. hlp* lviewp 1 b. zip mail/ osref. books pub/ root/ 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)