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commandlinefu.com is the place to record those command-line gems that you return to again and again.

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May 19, 2015 - A Look At The New Commandlinefu
I've put together a short writeup on what kind of newness you can expect from the next iteration of clfu. Check it out here.
March 2, 2015 - New Management
I'm Jon, I'll be maintaining and improving clfu. Thanks to David for building such a great resource!

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Psst. Open beta.

Wow, didn't really expect you to read this far down. The latest iteration of the site is in open beta. It's a gentle open beta-- not in prime-time just yet. It's being hosted over at UpGuard (link) and you are more than welcome to give it a shot. Couple things:

  • » The open beta is running a copy of the database that will not carry over to the final version. Don't post anything you don't mind losing.
  • » If you wish to use your user account, you will probably need to reset your password.
Your feedback is appreciated via the form on the beta page. Thanks! -Jon & CLFU Team

Commands tagged mysql from sorted by
Terminal - Commands tagged mysql - 58 results
slave start; SELECT MASTER_POS_WAIT('master.000088','8145654'); slave stop;
2009-03-26 14:11:43
User: slim

say you want to reinitialize the slave database without resetting the master positions. You stop the slave, dump the master database with --master-data=2 then execute the command on the slave and wait for it to stop at the exact position of the dump. reinit the slave db and start the slave. enjoy.

mysql DATABASE -N -s -r -e 'SQL COMMAND'
2009-03-24 19:53:46
User: alperyilmaz
Tags: mysql

-N removes header

-s removes separator chars

-r raw output

After using these options, the MySQL ouptut can be used with pipes very easily

echo -e "[client]\nuser = YOURUSERNAME\npassword = YOURPASSWORD" > ~/.my.cnf
2009-03-24 19:05:39
User: alperyilmaz
Functions: echo
Tags: mysql bash

The file .my.cnf located at user's home directory is used for mysql login. If this file exists, then


can be replaced with

mysql database -e 'SOME SQL COMMAND'

It saves you from typing!

This is valid for mysqladmin and mysqldump commands as well.

cat schema.sql data.sql test_data.sql | mysql -u user --password=pass dbname
2009-03-24 08:39:40
User: tristan_ph
Functions: cat
Tags: mysql cat

Be aware of using the --password argument as it will appear your password in plain text on the screen. You may use -p argument instead, it will prompt you to enter you password in hidden mode.

mysql --database=dbname -B -N -e "SHOW TABLES" | awk '{print "ALTER TABLE", $1, "CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;"}' | mysql --database=dbname &
2009-03-21 18:45:15
User: root
Functions: awk
Tags: mysql

This loops through all tables and changes their collations to UTF8. You should backup beforehand though in case some data is lost in the process.

watch -n 1 uptime\;myqladmin --user=<user> --password=<password> --verbose processlist
2009-03-21 18:29:28
User: root
Functions: watch
Tags: mysql

Useful for monitoring both MySQL and the server load at the same time.

ssh [email protected] 'mysqldump dbname | gzip' > /path/to/backups/db-backup-`date +%Y-%m-%d`.sql.gz
2009-02-18 21:12:53
User: root
Functions: ssh
Tags: mysql

I have this on a daily cronjob to backup the commandlinefu.com database from NearlyFreeSpeech.net (awesome hosts by the way) to my local drive. Note that (on my Ubuntu system at least) you need to escape the % signs on the crontab.

watch -n 1 mysqladmin --user=<user> --password=<password> processlist
2009-02-16 11:21:16
User: root
Functions: watch
Tags: mysql

Watch is a very useful command for periodically running another command - in this using mysqladmin to display the processlist. This is useful for monitoring which queries are causing your server to clog up.

More info here: http://codeinthehole.com/archives/2-Monitoring-MySQL-processes.html