Linux Command Directory
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.
System administration command. Display the previous and current system runlevels as reported in the utmp file. The default utmp file is /var/run/utmp. See init for a summary of runlevels.