MySQL: tee saving your output to a file

Tee is a unix command that takes the standard out output of a Unix command and writes it to both your terminal and a file. Until recently I never knew there was a MySQL client command that performed the same function. Today I will show you an example of how to use it.

First login to the MySQL CLI (command line interface)

 $ mysql -uroot -p
 Enter password:
 Welcome to the MySQL monitor.  Commands end with ; or g.
 Your MySQL connection id is 24839

Once you are in you will have a command prompt. From there simply type tee and the file path and name you want to save to.

 mysql> tee /var/tmp/mysql_tee.out
 Logging to file '/var/tmp/mysql_tee.out'
 mysql> use mysql;
 Reading table information for completion of table and column names
 You can turn off this feature to get a quicker startup with -A
 
 Database changed
 mysql> show tables;
 +---------------------------+
 | Tables_in_mysql           |
 +---------------------------+
 | columns_priv              |
 | db                        |
 | event                     |
 | func                      |
 | general_log               |
 | help_category             |
 | help_keyword              |
 | help_relation             |
 | help_topic                |
 | host                      |
 | ndb_binlog_index          |
 | plugin                    |
 | proc                      |
 | procs_priv                |
 | servers                   |
 | slow_log                  |
 | tables_priv               |
 | time_zone                 |
 | time_zone_leap_second     |
 | time_zone_name            |
 | time_zone_transition      |
 | time_zone_transition_type |
 | user                      |
 +---------------------------+
 23 rows in set (0.00 sec)

Now just check your file and make sure your commands were logged.

 $ ls -la /var/tmp/mysql_tee.out
 -rw-r--r-- 1 ubuntu ubuntu 1030 2011-12-22 01:43 /var/tmp/mysql_tee.out
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Benjamin Cane
Principal Engineer, Vice President

Benjamin Cane is Principal Engineer at American Express. He has more than 16 years of experience with roles in both systems and software engineering. He leverages both his systems and software skills to build end-to-end platforms. Platforms, purpose built for performance and resiliency. Benjamin is also the author of Red Hat Enterprise Linux - Troubleshooting Guide (2015, Packt Publishing), and he has published many popular articles on topics such as Linux, Docker, Python, Go and Performance Tuning. Thoughts and Opinions expressed in my articles are my own.

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