Printf examples

awk
awk -F: '{ printf("%-15s %s\n", $1, $5) }' /etc/passwd
perl
printf "%-21s %-s\n", "--from", "search envelope sender address";
shell
printf "%-9s %-16s %-8s %-8s\n" "Switch" "MAC address" "Module" "Port" > $OUTPUT_FILE