MAN SUDO SOFTWARE
This is free software see the source for copying conditions. var/log/wtmp A new runlevel record for the shutdown time will be appended to this file. Environment RUNLEVEL reboot will read the current runlevel from this environment variable if set in preference to reading from /var/run/utmp Files /var/run/utmp Where the current runlevel will be read from this file will also be updated with the runlevel record being replaced by a shutdown time record. There are many that think sudo is the best way to achieve. Effectively, sudo allows a user to run a program as another user (most often the root user). What sudo does is incredibly important and crucial to many Linux distributions. w, -wtmp-only Does not call shutdown(8) or the reboot(2) system call and instead only writes the shutdown record to /var/log/wtmp -verbose Outputs slightly more verbose messages when rebooting, useful for debugging problems with shutdown. Sudo stands for either substitute user do or super user do (depending upon how you want to look at it). The su command exists on most unix-like systems. Read the sudoers man page for more information use sudo visudo to edit the sudoers file. Sudo is very configurable for example it can be configured to let a certain user only execute certain commands as root. p, -poweroff Instructs the halt command to instead behave as poweroff. For more information, see the sudo website, or type man sudo on your system. For more information, see the sudo website, or type man sudo on your system. Otherwise this simply invokes the shutdown(8) tool with the appropriate arguments.īefore invoking reboot(2), a shutdown time record is first written to /var/log/wtmp Options -f, -force Does not invoke shutdown(8) and instead performs the actual action you would expect from the name. When called with -force or when in runlevel 0 or 6, this tool invokes the reboot(2) system call itself and directly These programs allow a system administrator to reboot, halt or poweroff the system.
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