§ Bash snippet to remove a line from a file
A while back I was working on a project that involved spooling up and shutting down a lot of Amazon EC2 instances while testing and I was constantly running in to an issue where my ~/.ssh/known_hosts
file was out of sync with the server that I was connecting to.
Despite how simple it is, I could never remember the sed
command to remove a line from a file. To help get around having to repeatedly manage my known_hosts file and/or look up the sed
command I wrote a little function to remove lines from files using sed. Hopefully someone else out there finds this useful.
rmline() {
if ! [ "$#" = "2" ]; then
echo 'Invalid paramter count';
echo 'Usage: rmline line-num filename'
return;
fi
sed -i 0 "$1d" $2
}
So, stick that in your .profile
and smoke it enjoy!
Tagged as: bash function line number remove rmline sed