CentOS 7下的MySQL命令

CentOS 7下启动、关闭、重启、查看MySQL服务

1.启动命令

[root@xufeng Desktop]# service mysqld start
Redirecting to /bin/systemctl start mysqld.service
2.关闭命令

[root@xufeng ~]# service mysqld stop
Redirecting to /bin/systemctl stop mysqld.service
3.重启命令

[root@xufeng ~]# service mysqld restart
Redirecting to /bin/systemctl restart mysqld.service

4.查看服务状态

[root@xufeng ~]# service mysqld status
Redirecting to /bin/systemctl status mysqld.service
● mysqld.service - MySQL Server
Loaded: loaded (/usr/lib/systemd/system/mysqld.service; disabled; vendor preset: disabled)
Active: active (running) since Wed 2018-07-18 22:34:06 EDT; 1min 11s ago
Docs: man:mysqld(8)
http://dev.mysql.com/doc/refman/en/using-systemd.html
Process: 4366 ExecStart=/usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid $MYSQLD_OPTS (code=exited, status=0/SUCCESS)
Process: 4345 ExecStartPre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/SUCCESS)
Main PID: 4370 (mysqld)
CGroup: /system.slice/mysqld.service
└─4370 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid

Jul 18 22:34:04 xufeng.goertek.com systemd[1]: Starting MySQL Server...
Jul 18 22:34:06 xufeng.goertek.com systemd[1]: Started MySQL Server.
5.查看MySql系统配置

[root@xufeng ~]# cat /etc/my.cnf
# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html

[mysqld]
#
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
#
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
#
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock

# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0

log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
5.查看MySql版本

方法1：使用mysql -v命令查看：

[root@yeebian mysql]# mysql -V

mysql  Ver 14.14 Distrib 5.1.73,for redhat-linux-gnu (x86_64)using readline 5.1

方法2：在mysql --help命令内容中查看：

[root@yeebian mysql]# mysql --help | grep Distrib

mysql  Ver 14.14 Distrib 5.1.73,for redhat-linux-gnu (x86_64)using readline 5.1

方法3：通过rpm命令查看安装包版本：

[root@yeebian mysql]# rpm -qa | grep mysql

mysql-5.1.73-8.el6_8.x86_64<br>mysql-server-5.1.73-8.el6_8.x86_64

方法4：登录数据库时，你可以看到对应mysql数据库的版本信息，如下所示：