in Ubuntu:
sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade
sudo do-release-upgrade
#to check:
sudo do-release-upgrade -c
sudo apt-get upgrade --fix-missing
sudo apt list --upgradable
#to clean:
sudo apt autoremove
in Oracle Linux:
sudo yum update
sudo yum upgrade yum kernel
sudo yum -y upgrade
#to clean:
sudo yum clean all
sudo yum autoremove