chfn - change real user name and information


   chfn [options] [LOGIN]


   The chfn command changes user fullname, office room number, office
   phone number, and home phone number information for a user's account.
   This information is typically printed by finger(1) and similar
   programs. A normal user may only change the fields for her own account,
   subject to the restrictions in /etc/login.defs. (The default
   configuration is to prevent users from changing their fullname.) The
   superuser may change any field for any account. Additionally, only the
   superuser may use the -o option to change the undefined portions of the
   GECOS field.

   These fields must not contain any colons. Except for the other field,
   they should not contain any comma or equal sign. It is also recommended
   to avoid non-US-ASCII characters, but this is only enforced for the
   phone numbers. The other field is used to store accounting information
   used by other applications.


   The options which apply to the chfn command are:

   -f, --full-name FULL_NAME
       Change the user's full name.

   -h, --home-phone HOME_PHONE
       Change the user's home phone number.

   -o, --other OTHER
       Change the user's other GECOS information. This field is used to
       store accounting information used by other applications, and can be
       changed only by a superuser.

   -r, --room ROOM_NUMBER
       Change the user's room number.

   -R, --root CHROOT_DIR
       Apply changes in the CHROOT_DIR directory and use the configuration
       files from the CHROOT_DIR directory.

   -u, --help
       Display help message and exit.

   -w, --work-phone WORK_PHONE
       Change the user's office phone number.

   If none of the options are selected, chfn operates in an interactive
   fashion, prompting the user with the current values for all of the
   fields. Enter the new value to change the field, or leave the line
   blank to use the current value. The current value is displayed between
   a pair of [ ] marks. Without options, chfn prompts for the current user


   The following configuration variables in /etc/login.defs change the
   behavior of this tool:

   CHFN_RESTRICT (string)
       This parameter specifies which values in the gecos field of the
       /etc/passwd file may be changed by regular users using the chfn
       program. It can be any combination of letters f, r, w, h, for Full
       name, Room number, Work phone, and Home phone, respectively. For
       backward compatibility, yes is equivalent to rwh and no is
       equivalent to frwh. If not specified, only the superuser can make
       any changes. The most restrictive setting is better achieved by not
       installing chfn SUID.


       Shadow password suite configuration.

       User account information.


   chsh(1), login.defs(5), passwd(5).


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.

Free Software

Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.

Free Books

The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.