[root@localhost etc]# ps -A|grep mysql
26080 pts/0 00:00:00 mysql
[root@localhost etc]# kill -9 26080
[root@localhost etc]# ps -A|grep mysql
[root@localhost etc]# mysql restart
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2 "No such file or directory")
[root@localhost etc]# /etc/init.d/mysql restart
Restarting mysql (via systemctl): [ OK ]
[root@localhost etc]# mysql -uroot -p
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 2
Server version: 10.1.38-MariaDB MariaDB Server
Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]> ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock'
原文：https://www.cnblogs.com/apollo1616/p/10436106.html