Monday, March 16, 2020

Viewing and configuring password aging on Linux

User passwords on Linux systems can be configured to be permanent or can be set to expire so that individuals must reset them periodically. Periodic password changing is generally considered good practice for security reasons, but is not configured by default.

To view and modify password-aging settings, you need to be familiar with a couple important commands – the chage command along with its -l option and the passwd command with its -S. These commands, along with a few other chage commands that are used to configure password aging are described in this post.

Viewing password aging settings

The way to determine if password aging is in place for some particular account is to use the chage command as shown below. Note that root authority is needed to check any account other than your own. Notice the password expiration date below.

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Thanks to Sandra Henry-Stocker (see source)

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