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A simple script for Debian/Ubuntu which will check for updates and act accordingly
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| #!/bin/sh | |
| # A simple Debian/Ubuntu script which will check for updates and act accordingly | |
| # Version 1.2 | |
| # Source: https://superuser.com/questions/199869/check-number-of-pending-security-updates-in-ubuntu | |
| # Status levels | |
| STATUS_OK=0 | |
| STATUS_WARNING=1 | |
| STATUS_CRITICAL=2 | |
| STATUS_UNKNOWN=3 | |
| # Start script | |
| echo "Starting update script..." | |
| # Check if "update-notifier-common" is installed | |
| DEPENDENCIES=$(dpkg-query -l update-notifier-common 2>&1) | |
| if [ $? -ne 0 ]; then | |
| # Dependency 'update-notifier-common' is not installed | |
| echo "Dependency 'update-notifier-common' is not installed." | |
| # Check if "dependencies" argument is passed | |
| if [ "$1" = "dependencies" ] || [ "$2" = "dependencies" ] || [ "$3" = "dependencies" ]; then | |
| # Install 'update-notifier-common' | |
| echo "Installing dependency 'update-notifier-common'..." | |
| DEPENDENCIES=$(sudo apt -y install update-notifier-common 2>&1) | |
| # Check if 'update-notifier-common' installed successful | |
| if [ $? -ne 0 ]; then | |
| # Failed, exit script | |
| echo "Failed to install dependency 'update-notifier-common'!" | |
| echo "Script cannot continue, exiting now." | |
| exit | |
| else | |
| # Successful, continue script | |
| echo "Dependency 'update-notifier-common' is successful installed!" | |
| fi | |
| else | |
| # Exit script | |
| echo "Script cannot continue, exiting now." | |
| exit | |
| fi | |
| fi | |
| # Check if "autoremove" argument is passed | |
| if [ "$1" = "autoremove" ] || [ "$2" = "autoremove" ] || [ "$3" = "autoremove" ]; then | |
| # Run autoremove | |
| echo "Autoremove packages..." | |
| AUTOREMOVE=$(sudo apt -y autoremove 2>&1) | |
| # Check if autoremove was successful | |
| if [ $? -ne 0 ]; then | |
| echo "Autoremove packages failed!" | |
| else | |
| echo "Autoremove packages completed!" | |
| fi | |
| fi | |
| # Update package lists | |
| echo "Updating package lists..." | |
| PACKAGES=$(sudo apt -y update 2>&1) | |
| # Check if package lists update was successful | |
| if [ $? -ne 0 ]; then | |
| # Failed, exit script | |
| echo "Package lists update failed!" | |
| echo "Script cannot continue, exiting now." | |
| exit | |
| else | |
| # Successful, continue script | |
| echo "Package lists update completed!" | |
| fi | |
| # Query pending updates | |
| UPDATES=$(/usr/lib/update-notifier/apt-check 2>&1) | |
| # Check if pending updates query succeeded | |
| if [ $? -ne 0 ]; then | |
| # Pending updates query failed | |
| echo "Querying pending updates failed." | |
| STATUS=$STATUS_UNKNOWN | |
| else | |
| # Check for the case where there are no updates | |
| if [ "$UPDATES" = "0;0" ]; then | |
| # No updates | |
| echo "All packages are up-to-date." | |
| STATUS=$STATUS_OK | |
| else | |
| # Extract pending updates query | |
| PENDING_GENERAL=$(echo "${UPDATES}" | cut -d ";" -f 1) | |
| PENDING_SECURITY=$(echo "${UPDATES}" | cut -d ";" -f 2) | |
| # Check for pending non-security updates | |
| if [ "$PENDING_GENERAL" != "0" ]; then | |
| echo "${PENDING_GENERAL} non-security update(s) pending." | |
| STATUS=$STATUS_WARNING | |
| fi | |
| # Check for pending security updates | |
| if [ "$PENDING_SECURITY" != "0" ]; then | |
| echo "${PENDING_SECURITY} security update(s) pending." | |
| STATUS=$STATUS_CRITICAL | |
| fi | |
| fi | |
| # Check if pending updates query was recognized | |
| if [ "$STATUS" != "$STATUS_OK" ] && [ "$STATUS" != "$STATUS_WARNING" ] && [ "$STATUS" != "$STATUS_CRITICAL" ]; then | |
| echo "Script failed, manual intervention required." | |
| STATUS=$STATUS_UNKNOWN | |
| fi | |
| fi | |
| # Check if update sequence should be run | |
| if [ "$STATUS" = "$STATUS_WARNING" ] || [ "$STATUS" = "$STATUS_CRITICAL" ]; then | |
| # Run update sequence | |
| echo "Starting update sequence..." | |
| sudo apt -y dist-upgrade | |
| sync | |
| sleep 2 | |
| echo "Update sequence is done!" | |
| # Check if "reboot" argument is passed | |
| if [ "$1" = "reboot" ] || [ "$2" = "reboot" ] || [ "$3" = "reboot" ]; then | |
| sync | |
| sudo shutdown --reboot 1 "Rebooting in 1 minute after update(s) were installed..." | |
| fi | |
| else | |
| echo "Script is done, ending now!" | |
| fi |
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