mysql error 2002

1.好几天没登陆mysql 了，登陆mysql时报错2002； 2、先查看 /etc/rc.d/init.d/mysqld status或者用ps -aux|grep mysql 看看mysql是否已经启动. 3.用service mysql start 启动mysql，启动失败 4.sudo service mysql restart 重启mysql,还是失败 5.sudo systemctl

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