Common Terminal Commands.

I tend to forget a lot of this stuff as I don’t use it often (I am not a computer scientist by trade), so here is a list of useful terminal commands. filpath

• Copy a file

  cp [options] source destination
  

  Options: -f = force, -R = recursive, -v = verbose

• Permissions

  Current permissions

  ls -l file
  

  Change permissions

  chmod value file
  

  Value: 3 digit code for owner, group, all

  7 = no restrictions, 6 = read write, 5 = read execute, 4 = read, 0 = no access

• Move/change name of file

  mv [options] source destination
  

  Options: -f = force, -v = verbose

• Find files and or delete matching a pattern

  find . -name "*.bak" -type f
  
  find . -name "*.bak" -type f -delete
  

• Find a file or text in a file

  grep [options] search_pattern [file_pattern]
  

  grep = general regular expression program

  search_pattern = a regular expression or string in

  file_pattern = a file or directory or file pattern ex. *.html

  Options: -i = ignore case, -r = recursive, -l = just file names, -n = show line number

  +many more this site seems to have a pretty complete list with good descriptions

  As for Regular expressions there are lots of great resources out there. I may put a post together with the important to me stuff at some point but here are some resources:

  Rexegg

  cheatography