Update all software on a Debian based system; Raspberry Pi

sysupdate.sh

#! /bin/bash

echo "..Updating"
echo "=============="
logger -p local1.info -t sysupdate Update
# sudo apt-get update
sudo apt update

echo
echo "..Listing"
echo "=============="
apt list --upgradable

echo
echo "..Cleaning"
echo "=============="
logger -p local1.info -t sysupdate AutoClean
sudo apt-get -y autoclean

echo
echo "..Removing"
echo "=============="
logger -p local1.info -t sysupdate AutoRemove
sudo apt-get -y autoremove

echo
echo "..Upgrading"
echo "=============="
logger -p local1.info -t sysupdate Upgrade
sudo apt -yuV upgrade

echo
echo
echo "System Update for $(hostname) is finished"
echo
echo

SYSUPDATE.SH

Bash script
Updates all software on a Debian based system

Requires sudo and uses apt