If you want to implement the same script, create a file in \/var\/local\/bin\/ as below<\/p>\n\n\n\n
\/usr\/local\/bin\/lxc_updater.sh<\/code><\/pre>\n\n\n\n#!\/bin\/bash\n\n# Define log file\nLOGFILE=\"\/var\/log\/lxc_update.log\"\n\n# Check if the script is running in an interactive terminal\nif [ -t 1 ]; then\n # If interactive, output to both terminal and log file\n LOG_OUTPUT_MODE=\"TEE\"\n echo \"Running in interactive mode. Output will be shown in terminal and logged.\"\nelse\n # If not interactive (cron job), redirect all output to the log file\n LOG_OUTPUT_MODE=\"SILENT\"\n exec 1>>$LOGFILE 2>&1\nfi\n\n# Add a function to handle logging based on the mode\nlog_message() {\n local message=\"$1\"\n if [ \"$LOG_OUTPUT_MODE\" == \"TEE\" ]; then\n echo \"$message\" | tee -a \"$LOGFILE\"\n else\n echo \"$message\"\n fi\n}\n\n# Use full path for lxc commands\nLXC_LS_CMD=\"\/usr\/bin\/lxc-ls\"\nLXC_ATTACH_CMD=\"\/usr\/bin\/lxc-attach\"\nLXC_STOP_CMD=\"\/usr\/bin\/lxc-stop\"\nLXC_START_CMD=\"\/usr\/bin\/lxc-start\"\n\n# Add timestamp\nlog_message \"---------------------------------------------------\"\nlog_message \"LXC container update started on $(date)\"\nlog_message \"---------------------------------------------------\"\n\n# Get a list of all running LXC containers\nCONTAINERS_LIST=$($LXC_LS_CMD -f | grep 'RUNNING' | awk '{print $1}')\n\nif [ -z \"$CONTAINERS_LIST\" ]; then\n log_message \"No running LXC containers found. Exiting.\"\n exit 0\nfi\n\n# Loop through each running container using a while loop\necho \"$CONTAINERS_LIST\" | while read CONTAINER; do\n log_message \"Processing container: $CONTAINER\"\n\n # Check for the container's OS and run appropriate commands\n if $LXC_ATTACH_CMD -n \"$CONTAINER\" -- test -f \/usr\/bin\/apt >\/dev\/null 2>&1; then\n log_message \"Detected APT-based system. Updating...\"\n $LXC_ATTACH_CMD -n \"$CONTAINER\" -- bash -c \"apt-get update && apt-get upgrade -y && apt-get autoremove -y\"\n\n elif $LXC_ATTACH_CMD -n \"$CONTAINER\" -- test -f \/usr\/bin\/pacman >\/dev\/null 2>&1; then\n log_message \"Detected Arch-based system. Updating...\"\n $LXC_ATTACH_CMD -n \"$CONTAINER\" -- bash -c \"pacman -Syu --noconfirm\"\n\n elif $LXC_ATTACH_CMD -n \"$CONTAINER\" -- test -f \/usr\/bin\/dnf >\/dev\/null 2>&1; then\n log_message \"Detected Fedora-based system. Updating...\"\n $LXC_ATTACH_CMD -n \"$CONTAINER\" -- bash -c \"dnf -y update\"\n\n elif $LXC_ATTACH_CMD -n \"$CONTAINER\" -- test -f \/sbin\/apk >\/dev\/null 2>&1; then\n log_message \"Detected Alpine Linux. Updating...\"\n $LXC_ATTACH_CMD -n \"$CONTAINER\" -- sh -c \"apk update && apk upgrade && apk-autoremove\"\n\n else\n log_message \"Unknown package manager for $CONTAINER. Skipping.\"\n continue\n fi\n\n # Check if a reboot is required\n if $LXC_ATTACH_CMD -n \"$CONTAINER\" -- ls \/var\/run\/reboot-required >\/dev\/null 2>&1; then\n log_message \"Reboot required for $CONTAINER. Rebooting now...\"\n $LXC_STOP_CMD -n \"$CONTAINER\"\n $LXC_START_CMD -n \"$CONTAINER\"\n log_message \"$CONTAINER rebooted successfully.\"\n elif $LXC_ATTACH_CMD -n \"$CONTAINER\" -- \/usr\/bin\/needs-restarting -r >\/dev\/null 2>&1; then\n log_message \"Reboot required for $CONTAINER. Rebooting now...\"\n $LXC_STOP_CMD -n \"$CONTAINER\"\n $LXC_START_CMD -n \"$CONTAINER\"\n log_message \"$CONTAINER rebooted successfully.\"\n elif $LXC_ATTACH_CMD -n \"$CONTAINER\" -- test -f \/var\/run\/reboot-required.pkgs >\/dev\/null 2>&1; then\n log_message \"Reboot required for $CONTAINER. Rebooting now...\"\n $LXC_STOP_CMD -n \"$CONTAINER\"\n $LXC_START_CMD -n \"$CONTAINER\"\n log_message \"$CONTAINER rebooted successfully.\"\n else\n log_message \"No reboot required for $CONTAINER.\"\n fi\n\ndone\n\nlog_message \"---------------------------------------------------\"\nlog_message \"LXC container update finished on $(date)\"\nlog_message \"---------------------------------------------------\"<\/code><\/pre>\n\n\n\nThen make sure the script can be executed<\/p>\n\n\n\n
sudo chmod +x \/usr\/local\/bin\/lxc_updater.sh<\/code><\/pre>\n\n\n\nYou can testrun the script with the following command<\/p>\n\n\n\n
sudo .\/lxc_updater.sh<\/code><\/pre>\n\n\n\nFinally if you want it to run every month on the first day of the month add a cronjob<\/p>\n\n\n\n
sudo crontab -e<\/code><\/pre>\n\n\n\nAnd add the following lines to the crontab<\/p>\n\n\n\n
# Run the LXC updater script at midnight on the 1:th day of every month\n0 0 1 * * \/usr\/local\/bin\/lxc_updater.sh\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"I have LXC containers running for services on in my Home-lab. I added this little bash script to update and reboot all containers.<\/p>\n","protected":false},"author":1,"featured_media":153,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-85","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-computers"],"_links":{"self":[{"href":"https:\/\/woxblom.com\/index.php\/wp-json\/wp\/v2\/posts\/85","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/woxblom.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/woxblom.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/woxblom.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/woxblom.com\/index.php\/wp-json\/wp\/v2\/comments?post=85"}],"version-history":[{"count":3,"href":"https:\/\/woxblom.com\/index.php\/wp-json\/wp\/v2\/posts\/85\/revisions"}],"predecessor-version":[{"id":156,"href":"https:\/\/woxblom.com\/index.php\/wp-json\/wp\/v2\/posts\/85\/revisions\/156"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/woxblom.com\/index.php\/wp-json\/wp\/v2\/media\/153"}],"wp:attachment":[{"href":"https:\/\/woxblom.com\/index.php\/wp-json\/wp\/v2\/media?parent=85"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/woxblom.com\/index.php\/wp-json\/wp\/v2\/categories?post=85"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/woxblom.com\/index.php\/wp-json\/wp\/v2\/tags?post=85"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}