如何使用mysqldump备份mysql？

Question

I am new to using mysql and i am trying to backup a mysql database using mysqldump .

So this is what i have done so far:-

1. I ssh'ed into my VM and run mysql to get into the mysql CLI

2. Then i ran the command mysql> SHOW DATABASES; which gives me the following output :-

   information| | rap_songs| | celebrities|

3. Now i am trying to backup my rap songs database and i run the following command :-

mysql> mysqldump -u root -p rap_songs > rap_songs_backup.sql

But nothing happens after this step. What am i doing wrong? Any help will be appreciated. thank you.

Answer 1

Run mysqldump in SSH terminal not in mysql terminal

For all database::

mysqldump --all-databases --single-transaction -u root -p > /all_databases.sql

For one database ( rap_song in this case)::

mysqldump -u root -p rap_songs > /your_backup.sql

Now you need to go to / to see your files, mysqldump usually show nothing once its done terminal again avail for new cmd. So if terminal is again avail it means its done!

Non-root user | Permission denied error!

Don't use /your_backup.sql

use ~/your_backup.sql instead

~/ is your user data directory

Mysqldump without password

You can create a .my.cnf in ~/

[mysqldump]
user=mysqluser
password=userpass

Then chmod 600 ~/.my.cnf

now in your script or crontab don't mention -p or --password and when your cron or script execute it will automatically pick password from here

Answer 2

Okay so I had to run this query in order to circumvent the errors :-

mysqldump --complete-insert --routines --triggers --single-transaction
    rap_songs> rap_songs_backup.sql