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MySQL基础安装

MySQL的三大主要分支

MySQL
Mariadb
Percona Serve

server表示服务器 client表示客户端

Ubuntu安装mysql 之前要更新包用apt update ;apt install mysql-server

安装MySQL用apt install mysql-server

[root@ubuntu2204 ~]#apt update ;apt install mysql-server  
#安装客户端
[root@ubuntu2004 ~]#apt install mysql-client
#查看是否自启
[root@ubuntu2204 ~]#systemctl status mysql.service
● mysql.service - MySQL Community Server
     Loaded: loaded (/lib/systemd/system/mysql.service; en
abled; vendor preset: enabled)
     Active: active (running) since Sat 2022-11
-05 15:52:56 CST; 2min 48s ago
    Process: 18114 ExecStartPre=/usr/share/mysql/mysql-sys
temd-start pre (code=exited, status=0/SUCCESS)
   Main PID: 18122 (mysqld)
     Status: "Server is operational"
      Tasks: 38 (limit: 2196)
     Memory: 364.2M
        CPU: 2.844s
     CGroup: /system.slice/mysql.service
             └─18122 /usr/sbin/mysqld

11月 05 15:52:55 ubuntu2204.wang.org systemd[1]: Starting 
MySQL Community Server...
11月 05 15:52:56 ubuntu2204.wang.org systemd[1]: Started M
ySQL Community Server.
#查看
[root@ubuntu2204 ~]#cat /lib/systemd/system/mysql.service
# MySQL systemd service file

[Unit]
Description=MySQL Community Server
After=network.target

[Install]
WantedBy=multi-user.target

[Service]
Type=notify
User=mysql
Group=mysql
PIDFile=/run/mysqld/mysqld.pid
PermissionsStartOnly=true
ExecStartPre=/usr/share/mysql/mysql-systemd-start pre
ExecStart=/usr/sbin/mysqld
TimeoutSec=infinity
Restart=on-failure
RuntimeDirectory=mysqld
RuntimeDirectoryMode=755
LimitNOFILE=10000
# Set enviroment variable MYSQLD_PARENT_PID. This is required for restart.
Environment=MYSQLD_PARENT_PID=1

范例：CentoS7利用yum 源安装MySQL5.7

[root@rocky8 ~]#tee /etc/yum.repos.d/mysql.repo <<EOF
> [mysql]
> name=mysql5.7
> baseurl=https://mirrors.tuna.tsinghua.sdu.cn/mysql/yum/mysql-5.7-community-e17-x86_64/
> gpgcheck=0
> EOF
[mysql]
name=mysql5.7
baseurl=https://mirrors.tuna.tsinghua.sdu.cn/mysql/yum/mysql-5.7-community-e17-x86_64/
gpgcheck=0

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