2020-05-22T01:55:17.332085Z 0 [ERROR] Can't start server: Bind on TCP/IP port: Address already in use
2020-05-22T01:55:17.332088Z 0 [ERROR] Do you already have another mysqld server running on port: 3306 ?
2020-05-22T01:55:17.332094Z 0 [ERROR] Aborting
查看端口占用情况
[root@izbp15dzsx0qokz9qdqojkz ~]# netstat -tunlp | grep mysql
tcp6 0 0 :::3306 :::* LISTEN 18941/mysqld
[root@izbp15dzsx0qokz9qdqojkz ~]# kill -9 18941
启动mysql：
[root@izbp15dzsx0qokz9qdqojkz ~]# systemctl start mysqld.service
[root@izbp15dzsx0qokz9qdqojkz ~]# ps aux |grep mysql*
root 356 0.0 0.0 112712 988 pts/0 S+ 10:02 0:00 grep --color=auto mysql57-community-release-el7-10.noarch.rpm
[root@izbp15dzsx0qokz9qdqojkz ~]# ps aux |grep mysqld
root 360 0.0 0.0 112712 964 pts/0 S+ 10:02 0:00 grep --color=auto mysqld
root 19373 0.0 0.0 107976 588 pts/1 T 09:07 0:00 cat /var/log/mysqld.log
root 19533 0.0 0.0 107956 648 pts/1 T 09:09 0:00 tailf /var/log/mysqld.log
root 27605 0.0 0.0 667308 2740 pts/2 T 09:54 0:00 systemctl status mysqld.service
mysql 32397 0.1 4.3 1122096 167372 ? Sl 09:58 0:00 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid
[root@izbp15dzsx0qokz9qdqojkz ~]# systemctl status mysqld.service
● mysqld.service - MySQL Server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
Active: active (running) since Fri 2020-05-22 09:58:19 CST; 3min 18s ago
Docs: man:mysqld(8)
http://dev.mysql.com/doc/refman/en/using-systemd.html
Process: 32394 ExecStart=/usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid $MYSQLD_OPTS (code=exited, status=0/SUCCESS)
Process: 32376 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS)
Main PID: 32397 (mysqld)
CGroup: /system.slice/mysqld.service
└─32397 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid
May 22 09:58:19 izbp15dzsx0qokz9qdqojkz systemd[1]: Starting MySQL Server...
May 22 09:58:19 izbp15dzsx0qokz9qdqojkz systemd[1]: Started MySQL Server.
