Hi Folks, In sed and/or awk, how would I formulate an if/else logic to skip a command if a specific text already exist in a file? I am getting multiple entries in a text file when the script is executed again. Thanks for your help

awk will work on all lines of a file by default, or you can use a regular expression and have it only act on matching (or non-matching) lines. e.g: $ cat testit.txt One Two Three Four Five Six Seven Eight Nine Ten Eleven Twelve $ awk '/i/ {print $0}' testit.txt Five Six Eight Nine $ awk '!/i/ {print $0}' testit.txt One Two Three Four Seven Ten Eleven Twelve Or if you need to check the whole file for the existence of some expression first, and then conditionally execute some commands, you could try something like if grep -l "Six" testit.txt >/dev/null then print Text was found else print Text was not found fi

Hi William, I used the last solution. It works nicely. Thanks a bunch!