[root@test1 usr]
# wget
# 安裝mysql源
[root@test1 usr]
# yum localinstall mysql57-community-release-el7-8.noarch.rpm
# 檢查mysql源是否安裝成功
[root@test1 usr]
# yum repolist enabled|grep "mysql.*-community.*"
mysql-connectors-community/x86_64 mysql connectors community 108
mysql-tools-community/x86_64 mysql tools community 90
mysql57-community/x86_64 mysql 5.7 community server 347
# 安裝mysql
[root@test1 usr]
# yum install mysql-community-server
# 設定開機啟動
[root@test1 usr]
# systemctl enable mysqld
[root@test1 usr]
# systemctl daemon-reload
# 啟用mysql服務
[root@test1 usr]
# systemctl start mysqld
# 檢視mysql服務狀態
[root@test1 usr]
# systemctl status mysqld
● mysqld.service - mysql server
loaded: loaded (/usr/lib/systemd/system/mysqld.service; enabled; vendor preset: disabled)
active: active (running) since 五 2019-06-28 15:27:15 cst; 25s ago
docs: man:mysqld(8)
process: 14758 execstart=/usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid $mysqld_opts
(code=exited, status=0/success)
process: 14684 execstartpre=/usr/bin/mysqld_pre_systemd (code=exited, status=0/success)
main pid: 14762 (mysqld)
cgroup: /system.slice/mysqld.service
└─14762 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld...
6月 28 15:26:48 test1 systemd[1]: starting mysql server...
6月 28 15:27:15 test1 systemd[1]: started mysql server.
# 查詢安裝生成的臨時登入密碼
[root@test1 usr]
# grep 'temporary password' /var/log/mysqld.log
2019-06-28t07:26:51.584687z 1 [note] a temporary password is generated for root@localhost: jix7)
#lccocn
# 使用臨時密碼登入
[root@test1 usr]
# mysql -u root -p
enter password: jix7)
#lccocn
welcome to the mysql monitor. commands end with ; or \g.
your mysql connection id is 3
server version: 5.7.26
# 修改密碼
mysql>
set password for
'root'@'localhost'=password('所要修改的密碼')
;query ok,
0rows affected,
1 warning (
0.00 sec)
# 選擇0（low），1（medium），2（strong）其中一種，選擇2需要提供密碼字典檔案
# mysql官網密碼策略詳細說明：
validate_password_policy=0
validate_password=off# 重啟mysql服務
[root@test1 etc]
# systemctl restart mysqld
配置檔案：/etc/my.cnf
日誌檔案：/var/log//var/log/mysqld.log
服務啟動指令碼：/usr/lib/systemd/system/mysqld.service
socket檔案：/var/run/mysqld/mysqld.pid
如果忘記root密碼，則按以下操作恢復：
mysql -u root
update mysql.user set authentication_string=password(
'123qwe'
) where user=
'root' and host =
'localhost'
;flush privileges
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