Mysql don't want to start

Question

Hello guys i am trying to start mysql. All was working fine before but now when i do :

service mysqld start

That anwser me :

Redirecting to /bin/systemctl start mysqld.service Job for mysqld.service failed because the control process exited with error code. See "systemctl status mysqld.service" and "journalctl -xe" for details.

So i did systemctl status mysqld.service and "journalctl -xe"

That the answer :

● mysqld.service - MySQL Server Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled) Active: failed (Result: exit-code) since Tue 2018-10-23 14:28:27 CEST; 4min 47s ago Docs: man:mysqld(8) http://dev.mysql.com/doc/refman/en/using-systemd.html Process: 6943 ExecStart=/usr/sbin/mysqld $MYSQLD_OPTS (code=exited, status=1/FAILURE) Process: 6922 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS) Main PID: 6943 (code=exited, status=1/FAILURE) Status: "SERVER_BOOTING" Error: 13 (Permission denied)

Oct 23 14:28:25 localhost.localdomain systemd1: Starting MySQL Server... Oct 23 14:28:27 localhost.localdomain systemd1: mysqld.service: Main process exited, code=exited, status=1/FAILURE Oct 23 14:28:27 localhost.localdomain systemd1: mysqld.service: Failed with result 'exit-code'. Oct 23 14:28:27 localhost.localdomain systemd1: Failed to start MySQL Server.

I understand anything of that ... need help

Last command that i did was : (if that can help)

npm install http

And i was doing a tchat with node.js and socket.io

Here more detail that i don't understand ^^

Answer 1

You can check permissions of /var/lib/mysql directory by command

ls -la /var/lib |grep mysql

The output should be like this

drwxr-xr-x 24 mysql mysql 4096 Aug 25 10:54 mysql

If you will see

drwxr-xr-x 24 root root 4096 Aug 25 10:54 mysql

Then you should to change ownership by command: chown -R mysql:mysql /var/lib/mysql