Ubuntu Notes

update meta data:

sudo apt-get update

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

apt-cache search keyword

list stuff that could be upgraded ( analogy: yum check-updates):

apt list --upgradable 

apt list --installed

apt-get install --only-upgrade fail2ban

want all , including kernel?

apt-get dist-upgrade  --dry-run

apt list --upgradable 
apt-get install --only-upgrade

debsums

checking the integrity of packages;

https://blog.sleeplessbeastie.eu/2015/03/02/how-to-verify-installed-packages/

kernel update

sudo update-initramfs -u -k 1.2.3-generic ( example )

then

sudo update-grub