Unix Concepts

• • find
  • ./ -name t*" -print"
• • env
  • shows current environment set-up
• • du -s
  • lists overall directory size
• • du -a
  • lists all files and their sizes in present directory and total directory size
• • du
  • lists all subdirectories and their sizes and total directory size
• • dig host
  • domain name
• • diff f1 f2
  • Lists file differences
• • df
  • gives disk usage
• • ^-d (ctrl-d)
  • close an open window
• • ^-c (ctrl-c)
  • kill a running process
• • cp -r D1D2
  • copies the directory D1 and renames it D2
• • cp f1 f2
  • Copy file f1 into f2
• • compress
  • compresses the file filename and puts a .Z extension on it.
• • clear
  • clear screen
• • chmod ###
  • Changes your protections. The order is: you|group|universe (rwxrwxrwx).
• • cat f1 f2 >f3
  • Concatenates f1(file 1) & f2(file 2) into f3(file 3)
• • cat f
  • List contents of file