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Find accounts with UID 0 and root privileges

harmlessSecurityalle
user@server
awk -F: '$3 == 0 {print $1}' /etc/passwd

Prints all usernames from /etc/passwd whose UID is 0. Each of these accounts has full root privileges, regardless of its name. On a clean system, only root appears here.

Note: Any other match should be investigated immediately, attackers like to create accounts with inconspicuous names and UID 0.

Also searched as

  • find users with uid 0
  • check for hidden root accounts
  • linux backdoor root user

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