grep Archives - Gullele's Corner

Multiple keyword search in multiple directories bash script

I guess the title is good enough
Probably you can do it in single grep command too.. but this way you will play with bash as well..

here is the bash script doing it


 #! /bin/bash
 dirs=(dir1 dir2 dir3 dir4 dir5)
 keywords=(keyword1 keyword2 keyword3 keyword4 keyword5)
 strs=""
 for word in "${keywords[@]}"; do
     strs+=" -e ${word} "
 done
 
 for path in "${dirs[@]}"; do
     dirname="$(basename "${path}")"
     grep -ir --color ${strs} ${path}
 done

Save this as finder.sh

and you can run it as bash finder.sh

See more on bash here

Regular expression for file and directory listing

I guess ls is a laudable command in the Linux world – the fact that everything is a file, we exploit it in a daily manner.
One usage of the a helpful command on ls is grep for listing regex’d listing.
here is the the simplest command that can list all the files/directories with that start with ‘pe’
First we would be on the directory we want the listing, then we would pipe the listing to grep!

ls | grep "^pe.*"

Even

ls | grep "^pe"

would result the same.
One that contains pe would be

ls | grep "pe"

and the one that ends with pe would be

ls | grep "pe$"