Tar & Mysql backup
Tar a directory
tar czf name_of_archive_file.tar.gz name_of_directory_to_tar
Gzip mysql dump
mysqldump admin_sdfsdf -u admin_sgerfgdfg -p | gzip > mysql.tar.gz
Untar a directory
tar -zxvf ../tmp/site.tar.gz .
Unzip mysql dump
zcat ../tmp/mysql.tar.gz | mysql sdfsdfsdf -u sdfsdfsdfsdfsf -p
Docker
Delete all containers
docker ps -aq | xargs docker rm -f
Delete all untagged images
docker images | grep "<none>" && docker rmi -f $(docker images | grep "<none>" | awk "{print \$3}")
Kill all java containers
docker ps | grep "java -" | cut -f 1 -d ' ' | xargs -n1 docker kill
systemd
Restart all failed units
systemctl list-units --state=failed | grep ● | cut -f 2 -d ' ' | xargs -n1 systemctl restart