Bash: Scripting - Userlist - awk

  1 #!/bin/bash
  2 #
  3 #  userlist.sh
  4 #
  5 PASSWORD_FILE=/etc/passwd
  6 n=1     #User number
  7
  8 for name in $(awk 'BEGIN{FS=":"} {print $1}' < "$PASSWORD_FILE")
  9 # Field Separator = :
 10 # Print first name
 11 # Get input from password file /etc/passwd
 12 do
 13         echo "USER #$n = $name"
 14         n=$[ $n +1 ]
 15 done
 16
 17 exit $?


Results:

$ ./userlist.sh|less
USER #1 = root
USER #2 = bin
USER #3 = daemon
USER #4 = adm
USER #5 = lp
USER #6 = sync
USER #7 = shutdown
...
USER #20 = pcap
...