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sudo: effective uid is not 0, is sudo installed setuid root

May 11, 2020 at 12:35 pm Leave a comment

When messing with up acl’s you may come across situation where the sudo will be stopped from functioning.  Especially , when you typed sudo you may notice the error “sudo: effective uid is not 0, is sudo installed setuid root”.

To diagnose the issue

Step1:
Check the /etc/sudoers file , whether you have added the group or the user name in the sudoers file for e.g: user abc

abc        ALL=(ALL)       NOPASSWD: ALL

Step2: if the output of the step 1 is correct check the permission on sudo as below (Output of a working sudo)

# ls -l /usr/bin/sudo
—s–x–x 2 root root 190904 Mar 4 18:21 /usr/bin/sudo

# stat /usr/bin/sudo
…
Access: (4111/—s–x–x) Uid: ( 0/ root) Gid: ( 0/ root)

In case , if you find the output of Step 2 is not matching with yours you can reset the permission to default

# rpm –setperms sudo.

Entry filed under: Linux. Tags: rhel, sudo, suid.