解决mysql登陆时出现“ERROR 2002 (HY000): Can't conne_MySQL

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mariadb同样适用

首先检查mysql状态

linux-6yo1:~ # /etc/init.d/mysql statusChecking for service MySQL: unusedmysql.service - LSB: Start the MySQL database server Loaded: loaded (/etc/init.d/mysql) Active: inactive (dead) CGroup: name=systemd:/system/mysql.serviceJul 17 15:28:28 linux-6yo1.site systemd[1]: Stopped LSB: Start the MySQL dat....Jul 17 15:30:38 linux-6yo1.site systemd[1]: Stopped LSB: Start the MySQL dat....

发现Active: inactive (dead)

重启mysql.

linux-6yo1:~ # /etc/init.d/mysql restart
redirecting to systemctl  restart mysql

再次查看mysql状态

linux-6yo1:~ # ps aux | grep mysql

root      5227  0.5  0.1   3204  1320 ?        S    15:39   0:00 /bin/sh /usr/bin/mysqld_safe --mysqld=mysqld --user=mysql --pid-file=/var/run/mysql/mysqld.pid --socket=/var/run/mysql/mysql.sock --datadir=/var/lib/mysql

mysql     5575  2.2  4.6 472456 47808 ?        Sl   15:39   0:00 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib/mysql/plugin --user=mysql --log-error=/var/log/mysql/mysqld.log --pid-file=/var/run/mysql/mysqld.pid --socket=/var/run/mysql/mysql.sock --port=3306root      5609  0.0  0.0   2756   772 pts/2    S+   15:39   0:00 grep --color=auto mysql

linux-6yo1:~ # /etc/init.d/mysql status

Checking for service MySQL:                                          runningmysql.service - LSB: Start the MySQL database server          Loaded: loaded (/etc/init.d/mysql)          Active: active (running) since Wed, 2013-07-17 15:39:11 CST; 29s ago         Process: 5100 ExecStart=/etc/init.d/mysql start (code=exited, status=0/SUCCESS)          CGroup: name=systemd:/system/mysql.service                  ├ 5227 /bin/sh /usr/bin/mysqld_safe --mysqld=mysqld --use...                  └ 5575 /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib...Jul 17 15:39:06 linux-6yo1.site mysql[5100]: Please report any problems with...!Jul 17 15:39:06 linux-6yo1.site mysql[5100]: The latest information about Ma....Jul 17 15:39:06 linux-6yo1.site mysql[5100]: You can find additional informa...:Jul 17 15:39:06 linux-6yo1.site mysql[5100]: http://dev.mysql.comJul 17 15:39:06 linux-6yo1.site mysql[5100]: Support MariaDB development by ...mJul 17 15:39:06 linux-6yo1.site mysql[5100]: Monty Program Ab. You can conta....Jul 17 15:39:06 linux-6yo1.site mysql[5100]: Alternatively consider joining ...:Jul 17 15:39:06 linux-6yo1.site mysql[5100]: http://kb.askmonty.org/en/contr.../Jul 17 15:39:11 linux-6yo1.site mysql[5100]: Starting service MySQL ..doneJul 17 15:39:11 linux-6yo1.site systemd[1]: Started LSB: Start the MySQL dat....