I am running a command in a script which saves usernames in an array and I was wondering if there is a simple solution to removing these usernames during a run of the lastlog command.

I was thinking of something like this:

lastlog | grep -v "Never logged in" | grep -v ${excluded_users} | awk '{print $1,":",$5,$6,$9 }'

If it at all works please let me know.

Otherwise I'm open for different suggestions and or solutions.

Thank you in advance.

CodePudding user response：

To extend your idea, you could put the list of users into a file and do a ... | grep -vwFf excluded_users.txt | .....

Perhaps a more robust way to remove the users would be to do it in your awk command:

awk '$1 ~! /userA|userB|userC/ {print ... }'