Listing files
   ls -alhp [Gg]* // all files; long format; shortened file sizes; directories with '/'
   ls -d [Gg]* // directories as plain files

Jobs
   nohup make batch0 >& make-0.out & { don't hangup and redirect errors to file }

Regexp
   . Any character
   * 0 or more prev characters
   ? 0 or 1 prev characters
   ^ Beginning of line
   $ End of line
   [abc] Match any one of characters
   [abc|def] Match either set

Grep:
   grep [options] regexp files
   -E = interpret regexp as an extended regular expression (basic regular expressions need a '\' to escape metacharacters)
   -n = print line number
   -i = ignore case
   -c = count matches
   -v = print lines not matching regexp
   -r = recurse thru subdirectories

Find: recursively descend directory tree starting at given path
   find path [options]
   -name expr = name of file to find
   -iname = same as -name but case insensitive
   -type char = file type. "d"=directory. 

Tar
   tar cvfz file.tar.gz   ...
   tar xvfz file.tar.gz

For loop
   for x in $( ls|grep '[[:digit:]]' ); do echo tar cf $x.tar $x; echo bzip2 --best $x.tar;done > /tmp/zip2.bat

Nfs
   root# mount giles:/nfs /mnt/nfs
   Edit /etc/fstab to have this line:
      giles:/nfs /mnt/nfs nfs rsize=8192,wsize=8291,timeo=14,intr 0 0
   Mac: 
      umount -f /mnt/nfs/
      mount_nfs 192.168.0.13:/home/ /mnt/nfs/

Disk space:
   df -h .

Directory size:
   du -hs 

Link
   ln -s bin bin.linux

File type
   file 
   If output is 'text', file is a text file. 'data' means a binary file.

Text processing
   cut -f2  {get second field}
   sort -u  {get unique rows}
   tr -d  {delete string from input}
   sed s/foo/fooey/ {replace all instances of foo} 

Bash shell
   .profile {user environment setup}
     alias dir='ls -al'
     PS1='[$HOSTNAME:\!] ' {sets the prompt}
     export PS1

Korn shell
   Cmd number = '!'
   Filename completion (emacs mode): ESC - ESC, ESC - =

Secure Shell and Copy
   ssh @
   scp  @:

Users and Groups
   adduser  // create new user
   adduser   // assign group to user
   id 

Permissions
   chmod a+w 
   chown : 

Processes
   ps ax[l|j|u]U 
      Selection: a=all processes w/tty; x=all processes w/o tty; U=by user
      Output formats: l=long; j=jobs; u=user
   nice -n  
   renice  [-p |-g ] {only su can decrement priority}

Searching for executables and documentation:
   which 
   locate 
   apropos 

Mac OS X
   Displaying dot files in Finder:
     defaults write com.apple.finder AppleShowAllFiles TRUE
     killall Finder

   Network Utility: displays networks status

   Adding a PICT preview to an EPS file:
     epstool --add-pict-preview --mac-rsrc abb.eps abb.eps/rsrc

mailx:
   Sending mail:
      echo 'This is a test' | mailx -s 'Subject' ybendana@yahoo.com

   Commands:
      from  {display message headers}

   Msg-list:
      * {all msgs}
      $ {last msg}
      - {previous msg}
      + {next msg}
      = {print current msg}

Sun
   stop-a gives prompt; type 'boot' to reboot

vi
   0/$ = go to start/end of line
   G = go to end of file
  :n = move to line number n
  C-g = show current line number
  C-f/C-b = scroll forward/backward
  {/|?} = search forward/backward for regexp {escape "/" with "\"}
  n = move forward to next matching expression
  i = insert
  a = append
  Esc = exit out of editing mode
  :w = write
  :q = quit
  x = delete character
  dd = delete line

CVS
   Create repository:
      cvs -d /usr/local/cvsroot init
   Environment vars:
      export CVSROOT=/usr/local/cvsroot
      export CVS_RSH=ssh
   Importing files
      cd 
      cvs import -m "comment"  vendor_tag release_tag
   Checkout
      cvs checkout|co  {Local}
      cvs -d :ext:faun.example.org:$CVSROOT checkout  {Remote}
      cvs -z3 -d:ext:ybendana@cvs.sourceforge.net:/cvsroot/dart co -P modulename
   Add file
      cvs add 
      cvs commit
   Remove file
      cvs remove -f 
      cvs commit