UNIX for Dummies Questions & Answers

#!/usr/bin/bash
while IFS=: read login  a b c name e
do
 printf " %-12s %s\n" "$login" "$name"|cut -d, -f1
done</etc/passwd

if [ -n $login -a -n $name ]

while IFS=: read login  a b c name e
do
    [[ -z $login || -z $name ]] && continue
    printf " %-12s %s\n" "$login" "$name" | cut -d, -f1
done</etc/passwd

awk -F":" '$5 != "" && $1 != "" { print $1 } ' /etc/passwd

if [ -n "$login" -a -n "$name" ]

if [ -n "$name" ]