Transfer: https: //blog.csdn.net/xufengzhu/article/details/81110982
centos7 open, close, view MySQL
1. Start the command
[root @ Xufeng Desktop] # Service mysqld Start
Redirecting to / bin / systemctl Start mysqld.service
2. Close the command
[root @ Xufeng ~] # Service mysqld STOP
Redirecting to / bin / systemctl STOP mysqld.service
3. Restart command
[root @ Xufeng ~] # Service mysqld restart
Redirecting to / bin / systemctl restart mysqld.service
4. Check service status
[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 is 22:34:04 xufeng.goertek.com systemd [. 1]: Starting the MySQL Server .. .
Jul-18 is 22:34:06 xufeng.goertek.com systemd [. 1]:. Started the MySQL Server
5. The system configuration view MySql
[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
Transfer: https: //blog.csdn.net/xufengzhu/article/details/81110982
centos7 open, close, view MySQL
1. Start the command
[root @ Xufeng Desktop] # Service mysqld Start
Redirecting to / bin / systemctl Start mysqld.service
2. Close the command
[root @ Xufeng ~] # Service mysqld STOP
Redirecting to / bin / systemctl STOP mysqld.service
3. Restart command
[root @ Xufeng ~] # Service mysqld restart
Redirecting to / bin / systemctl restart mysqld.service
4. Check service status
[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 is 22:34:04 xufeng.goertek.com systemd [. 1]: Starting the MySQL Server .. .
Jul-18 is 22:34:06 xufeng.goertek.com systemd [. 1]:. Started the MySQL Server
5. The system configuration view MySql
[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