ubuntu terminal command update upgrade code example

Example 1: update ubuntu in terminal

#gets package(s) update definitions
sudo apt update
#upgrades the package(s) for which update definitions are received
sudo apt upgrade

Example 2: ubuntu update

sudo -s -- <<EOF
apt-get update
apt-get upgrade -y
apt-get dist-upgrade -y
apt-get autoremove -y
apt-get autoclean -y
EOF