September 2012

HOW TO : Compare two directories in Linux

Quick post on using diff to compare two directories in Linux. This will show the list of files and subdirectories that are different in either directories

[code]diff /PATH_TO_FIRST_DIRECTORY /PATH_TO_SECOND_DIRECTORY -r –brief  [/code]

Options used

  • r : Searched recursively through the directory
  • –brief : Only shows the names of the files that differ. If you want details of the content that differs, remove this option
September 11, 2012 by HOWTO Linux Uncategorized 2

HOW TO : grep for response codes in apache logs

If you want to grep for certain http response codes in a apache log file

  • Look for all access requests with a 200 response code[code] grep -i "[: ]200[: ]" HTTP_ACCESS_LOG [/code]
  • Look for all access requests that do NOT have a 200 response code[code] grep -i -v "[: ]200[: ]" HTTP_ACCESS_LOG [/code]

Details of the options

  • [code]"[: ]"[/code]

    tells grep to look for space or tab before the specified string, which in this case is 200.

September 5, 2012 by HOWTO Linux Uncategorized Web 0