Distributions
I use Linux based operating systems exclusively - but different distributions of those. While the various init systems or package managers are described on separate wiki pages, this one deals with other commonalities between the Linux distributions I use and particularities of each one.
General
Gently restarting a Linux system
As described in this blog post
Holding down Alt and SysRq (which is the Print Screen key) while slowly typing
REISUBwill get you safely restarted.REISUOwill do a shutdown rather than a restart.
This functionality is based on Magic System
Requests. As
per this
discussion
in the Linux Kernel mailing list, S (sync) and U (umount) are not
necessary anymore on modern filesystems.