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Linux in a Nutshell

This directory of Linux commands is from Linux in a Nutshell, 5th Edition.

Click on any of the 687 commands below to get a description and list of available options. All links in the command summaries point to the online version of the book on Safari Bookshelf.

Buy it now, or read it online on Safari Bookshelf.


chfn [options] [username]

Change the information that is stored in /etc/passwd and displayed to the finger query. Without options, chfn enters interactive mode and prompts for changes. To make a field blank, enter the keyword none. Only a privileged user can change information for another user. For regular users, chfn prompts for the user's password before making the change.


-f, --full-name

Specify new full name.

-h, --home-phone

Specify new home phone number.

-o, --office

Specify new office number.

-p, --office-phone

Specify new office phone number.

-u, --usage, --help

Print help message and then exit.

-v, --version

Print version information and then exit.


chfn -f "Ellen Siever" ellen

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