References
The Red Hat Enterprise Linux 7 System Administrators guide: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/System_Administrators_Guide/chap-Managing_Services_with_systemd.html
The Swappiness Wikipedia page: http://en.wikipedia.org/wiki/Swappiness
The
vmstat
command Wikipedia page: http://en.wikipedia.org/wiki/VmstatThe
iostat
command Wikipedia page: http://en.wikipedia.org/wiki/IostatThe
lsof
command Wikipedia page: http://en.wikipedia.org/wiki/LsofThe
kill
command Wikipedia page: http://en.wikipedia.org/wiki/Kill_(command)The
pkill
command Wikipedia page: http://en.wikipedia.org/wiki/PkillSysVinit to Systemd Cheatsheet: https://fedoraproject.org/wiki/SysVinit_to_Systemd_Cheatsheet
The Orphans Wikipedia page: http://en.wikipedia.org/wiki/Orphan_process