Cacher is the code snippet organizer for pro developers

awk -F: '($3>=1000) && ($3!=65534)' /etc/passwd > passwd.new
awk -F: '($3>=1000) && ($3!=65534) {print $1}' /etc/passwd | grep -f - /etc/shadow > shadow.new
awk -F: '($3>=1000) && ($3!=65534)' /etc/group > group.new

cat passwd.new >> /etc/passwd
cat group.new >> /etc/group
cat shadow.new >> /etc/shadow