This is something that I use on a regular basis on all of my servers. How many times have you been ready to edit a file and either don’t make a backup copy or make one but by now are real tired of typing out copy one file to another name with a date stamp and blah blah blah. It’s not hard to do, but it gets old quick typing the same thing over and over again, plus you might not always name them the same thing or the same way, so now your backup files have different naming patterns and whatnot.

Don’t worry, I have an easy solution. I created a simple script to backup the file specified and append a time and date stamp to the end of it. I symlink this to the command ‘bu’ in someplace like /usr/bin so it’s always in the path of whatever user I might be (myself, root, backup, whoever?), and then POW, it’s easy to backup files plus they are always named the same way – you just type “bu filename”. Now, if you don’t like the way I name my file copies, feel free to customize this to suit your needs. Also, I currently have the script make the copy right next to the original file, but it would be easy to always copy the files to a backup directory somewhere if you wanted, the possibilities are endless!

OK, on to the script goodness:

#!/bin/bash
 
if [ "$1" == "" ]; then
  echo "No input given, stopping"
  exit
fi
 
YEAR=`date | awk '{print $6}'`
MONTH=`date | awk '{print $2}'`
DAY=`date | awk '{print $3}'`
TIME=`date | awk '{print $4}' | awk -F: '{print $1"-"$2"-"$3}'`
 
echo -n "Backing up the file named $1 ... "
/bin/cp -p $1 $1_${YEAR}.${MONTH}.${DAY}_${TIME} > /tmp/bu_run.log 2>&1
echo "done."

There you have it, a simple file backup script it bash that can save you time and many, many keystrokes. Drop me a comment and let me know what you think, or if you have any suggestions or improvements.