[SOLVED] how to create a script to check a list of users present in a system

Issue

I have a list of users in a file ( America, Belgium, India, Srilanka, Bhutan)
I need to run a script on each machine to check the above users exist, if its does not, create those users,
users are on file resides in /etc/users.txt

Contents of users.txt

America
Belgium
India
Srilanka
Bhutan

I tried this, but it’s not checking users on my list of files.

#!/bin/sh
if grep -q "^$1:" /etc/users.txt ;then
    echo exists
else
    echo FALSE
fi

Solution

1. you didnt call users.txt, you just called users

2. you have a bunch of incorrect regex in your grep

3. (optional) you should use -i on grep to accept lowercase letters

   #!/bin/sh
   if grep -i -q "$1" /etc/users.txt ;then
      echo exists
   else
      echo FALSE
   fi
   

Answered By – Taylor TEK

Answer Checked By – Katrina (BugsFixing Volunteer)