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UGU: Unix Guru Universe - Unix Tip #4420- April 17, 2024 - Home : Help : Today's Tip
Unix Tip #4420- April 17, 2024

THE NEXT UID


Here is one way to find out the
next available UID on a system.

It takes both the password and
group files and finds the next
available UID and displays it.

(No cats were harmed in the making
of this script)

#!/bin/bash
awk -F":" '{ print $3 }' /etc/passwd > number_list
awk -F":" '{ print $3 }' /etc/group >> number_list
A=` sort -g number_list | tail -1`
A=`expr $A + 1`
echo "New Available UID is $A"



NOTE: All tips provided are USE AT YOUR OWN RISK. Tips are submitted by various unix admins around the globe. UGU suggest you read and test each tip in a non-volitile environment before placing into production.


LAST 5 TIPS
4419 - TRANSFERRING MULTIBYTE FILES
4418 - LOGGING MAKES
4417 - ALIAS YOUR CONNECTIVITY
4416 - CHECK SENDMAIL SETTINGS
4415 - IS YOUR HARDWARE GETTING STOLEN?


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