oreilly.comSafari Books Online.Conferences.


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.


logname [option]

Consult /var/run/utmp for user's login name. If found, print it; otherwise, exit with an error message.



Print a help message and then exit.


Print version information and then exit.

Linux Resources
  • Linux Online
  • The Linux FAQ
  • Linux Kernel Archives
  • Kernel Traffic

  • Sponsored by: