Linux & ApplicationsSean Gavin Wayne State University

• multi-user environment-- log in: user name and password -- you never turn the computer on or off

Linux

• Linux with KDE graphic user interface

• navigation – where are my files?

• command line interface – listing, moving, finding, copying … my files

• applications – web browsing, text viewing, editing … my files

graphic user interface

•KDE •GNOME

makes the desktop look like a windows desktop – point and click

home – directory browser

search for files

help

shell – terminal for entering text commands

start menu – like windows

icons

Command Line Interface

• Shell Icon – window with a “prompt” rhic15:sean> ls

• type keyword commands – execute programs

• command “ls” lists files in a directory

• file names have format name.xxx (no blank spaces!!)• xxx – extension indicates the files function sean.tex

< word processor (latex)sean.cpp, sean.f < C++ or Fortran programmomLetter.txt < plain text (asci)web_page.htm < web document (html)

• no blank spaces, case sensitive

Favorite Unix Commands

• ls list files > ls

> ls *.txt (list files with extension .txt)

• ls –l list files with size, etc. > ls –l *.cpp

• ls –a list all files > ls –a

• lpr prints files > lpr sean.txt (default printer)> lpr –Pmono1200 sean.txt (specify printer)

• cd change directory > cd MyDirectory

> cd ( home directory)

• mkdir make new directory > mkdir MyNobel

• rm remove file > rm wrongStuff.txt

• rmdir remove directory > rm WrongStuff (delete contents first)

• cp copy file > cp old.txt new.txt (keeps old.txt)

• mv move file > mv old.txt new.txt (kills old.txt)

• more types file on screen > more money.txt

• pwd print working directory > pwd

FTP – Moving Files

Running Programs from Command Line

can type program name at the prompt to start application:> netscape & web browser> ghostview pic.ps & postscript file viewer> gv pic2.eps & a better postscript viewer> acroread taxReturn.pdf & acrobat pdf file viewer

compile and execute programs that you have written

text editors: emacs, xemacs

note: also find common programs are on the start menu

Summary

Unix – many choices, infinite possibilities

The setup at BNL, Cornell, Fermi will be different

• navigation in KDE graphic user interface

• command line interface – ls, cd, mv, cp, rm

• applications – netscape, ghost view, xemacs