Updates:

CentOS/RedHat Distribution Family
yum command cheatsheet:
https://access.redhat.com/sites/default/files/attachments/rh_yum_cheatsheet_1214_jcs_print-1.pdf

yum update
yum clean all
yum makecache

exceptions to updates can be put in 
/etc/yum.conf
The exception line must be only one line.


https://www.lifeintech.com/2017/05/01/dnf-cheat-sheet/
dnf update
dnf updateinfo list sec
dnf list-sec


Ubuntu/Debian/Mint Distribution Family
#  updates are done in 2 steps, first update then upgrade
#  apt-get update and apt-get upgrade can also be written
#  apt update and apt upgrade  

apt-get update
apt-get upgrade

apt-get clean
apt-get autoclean
apt-get autoremove


apt cheat sheet https://blog.packagecloud.io/eng/2015/03/30/apt-cheat-sheet/
http://cholla.mmto.org/computers/linux/debian/apt_cheat.pdf
SUSE distribution family
zypper update