The alias way to backup mysql database from command line
As I have told you before, I am really hooked on bash aliases1.
This blog entry emphasizes that point and presents how to make a MySql database backup via
mysqldump with only three words, even with three letters, if you will.
So, without further ado, let’s see the alias:
$ alias mysql-backup-db_name='mysqldump db_name -u db_user -p -h 127.0.0.1 --port 3306 --single-transaction > path_to_back_up_directory/db_name_$(date "+%Y-%m-%d_%H:%M").sql' $ mysql-backup-db_name
or, same with three letters:
$ alias mbd='mysqldump db_name -u db_user -p -h 127.0.0.1 --port 3306 --single-transaction > path_to_back_up_directory/db_name_$(date "+%Y-%m-%d_%H:%M").sql' $ mbd
-u, will ask you for the password. The port number is not mandatory (as it defaults to 3306), but if you are using other port, you need to specify it.
I personally prefer the whole name approach, as then it is more clear to me. I can start typing
mysql-and then there is auto complete. Besides that I can always
alias-grepit2 - (
alias alias-grep='alias | grep'), if I need to see how it looks like - using the alias in this case as sort of documentation…
Below there is a concrete example, where I backup the MySQL keycloak database:
$ mysql-backup-keycloak-prod aka $ mysqldump keycloak -u keycloak -p -h 127.0.0.1 --port 3306 --single-transaction > ~/backup/db/keycloak_db_$(date "+%Y-%m-%d_%H:%M").sql
That will generate a .sql file in the specified path:
$ ls -lrt ~/backup/db -rw-rw-r-- 1 ama ama 199219 Mar 10 07:04 keycloak_db_2017-03-10_07:04.sql -rw-rw-r-- 1 ama ama 198489 Apr 3 06:28 keycloak_db_2017-04-03_06:27.sql
We can take things even further, and back-up a remote database from the local machine, after we build a ssh-tunnel3 with an alias of course:
alias mysql-tunnel-linode='ssh -L 127.0.0.1:3305:127.0.0.1:3306 email@example.com -N' alias mysql-backup-keycloak-prod='mysqldump keycloak -u keycloak -p -h 127.0.0.1 --port 3305 --single-transaction > ~/backup/db/keycloak_db_prod_$(date "+%Y-%m-%d_%H:%M").sql'
Same back-up command as before, only the port differs now and is pointing to the tunnel port - 3305.
With this I think I’ve made my point about the power and versatility of bash aliases.