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How do I make my password unchangeable by another administrator in my system on Ubuntu 12.04 (Precise Pangolin)?

I am an administrator in my machine and I don't want another administrator to reset my password. Is it possible?

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not unless they don't have sudo rights... –  Alvar Jul 15 at 12:31

2 Answers 2

There is no way to make your password unchangeable.
The only way is to limit the privileges of other administrators.

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1) limited -> limit 2) administrators -> administrators' –  Peter Mortensen Jul 15 at 15:19
    
This is not the case. If /etc/passwd is not writable (on a read-only filesystem, or after removing the SETUID bit from /usr/bin/passwd, or garbage in /etc/nsswitch.conf or passwords on a down NIS server, or ...) nobody will be able to change his password. Pathological cases, true, but I have experiened each. –  waltinator Jul 15 at 15:48

No. If you are "an administrator", it means that you can run processes with UID = 0. Running with UID 0 grants a process many capabilities.

if the O.P. is "an administrator", it means that he/she can run processes with UID = 0. Running with UID 0 grants a process many capabilities.

Can you tell the difference between them? The system cannot. UID=0 and UID=0 are the same.

You are really asking "Can one use the powers of UID=0 to protect against UID=0?".

If the O.P. is malicious, you must solve the problem in the Real World.

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