How to: Run All Shell / Perl / Python Scripts in a Directory

Posted on in Categories Linux, Shell scripting, Sys admin, Tips, UNIX last updated October 12, 2007

I’ve directory called /home/vivek/scripts/daily with over 25 perl / shell / python scripts for managing daily tasks. One day for some weird reason my crond died and I did not noticed the incident for 2 days.

Now crond is started and I’d like to run all those scripts. Here is a quick for loop running all scripts in a directory called ~/scripts/daily/:

for s in ~/scripts/daily/*;do [ -x $s ] && $s || : ;done

Above script will run each and every executable script it finds in a directory.

Update: As pointed out by jeff (see below), you can use run-parts shell script for the same purpose:
$ run-parts ~/scripts/daily/*

Getting Yesterdays or Tomorrows Day With Bash Shell Date Command

Posted on in Categories Howto, Linux, Shell scripting, Tips, UNIX last updated June 17, 2007

When invoked without arguments, the date command displays the current date and time. Depending on the options specified, date will set the date and time or print it in a user defined way. I’ve seen many sysadmin writing perl scripts for calculating relative date such as yesterdays or tomorrows day. You can use GNU date command, which is designed to handle relative date calculation such as:

  • 1 Year
  • 2 Days
  • 2 Days ago
  • 5 Years