UNIX / Linux Reference

• UNIX
• List of Unix commands
• List of GNU Core Utilities commands
• List of GNU packages

• Environment variables (Unix and other OSes)

• UnixHelp
  • DOS to UNIX quick reference

man pages

• man pages

• man (command)
  • If given choices, normally select 1st choice - hit Enter
  • space for next page, q to quit
  • man (command) > file and can open it in editor to read easier
  • man -k (topic) - list of commands related to a particular topic

• Linux man pages online

Filesystem Hierarchy

• UNIX Filesystem Hierarchy
• Linux Filesystem Hierarchy
• Something like:

  # primary hierarchy 
  /
  /bin
  /sbin 
  /lib
  
  # secondary hierarchy
  /usr
  /usr/bin
  /usr/sbin
  /usr/lib
  
  # tertiary (local install) hierarchy 
  /usr/local
  /usr/local/bin
  /usr/local/sbin
  /usr/local/lib
  
  # other important system dirs:
  /dev
  /etc
  /var
  

• Windows Filesystem Hierarchy
  • OS programs and libraries are in a directory something like:
    C:\Windows\System32

  • User directory something like:
    C:\Users\me
  • C:\Users\me\My Documents

Linux

• Linux
• openSUSE

• Source code:
  • Linux source code from Linus Torvalds
  • openSUSE source code

• GNOME
• bash

DCU-specific

• Computing
  • docs.computing.dcu.ie

• DCU
  • ISS

• Redbrick
  • Redbrick Wiki
  • Helpdesk

Shell

• Unix shell
• Shell script

• UnixHelp
  • Bourne Shell programming
    • conditional statements and flow of control
    • special sh variables