背景介绍
ubuntu 20.04 版本系统自带的 MySQL 版本是 8.0,普通方法很难安装 5.7 版本的。由于 8.0 版本较 5.7 版本做了不少改动,笔者比较习惯使用 5.7 版本。
网上搜做了一圈,跟着各种教程试了很多遍,最后终于找到了成功的方法。过程记录分享出来,供大家参考。
安装过程
笔者的环境:
[email protected]:/home# cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=20.04
DISTRIB_CODENAME=focal
DISTRIB_DESCRIPTION="Ubuntu 20.04.4 LTS"
-
若已经安装了 8.0 版本的 MySQL,请先操作删除。
-
添加 MySQL 源
sudo vim /etc/apt/sources.list.d/mysql.list
添加如下内容,
deb http://repo.mysql.com/apt/ubuntu/ bionic mysql-apt-config
deb http://repo.mysql.com/apt/ubuntu/ bionic mysql-5.7
deb http://repo.mysql.com/apt/ubuntu/ bionic mysql-tools
deb-src http://repo.mysql.com/apt/ubuntu/ bionic mysql-5.7
更新,
sudo apt update
执行过程中可能会出现如下错误,
W: GPG error: http://repo.mysql.com/apt/ubuntu bionic InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 467B942D3A79BD29
E: The repository 'http://repo.mysql.com/apt/ubuntu bionic InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
执行如下命令即可,467B942D3A79BD29
根据实际情况替换。
root@hz192-168-1-55:/home# sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 467B942D3A79BD29
接着再重新执行更新,
sudo apt update
- 安装 MySQL
查看支持的 MySQL 版本,此处我们已经可以看到有 5.7.40-1ubuntu18.04
,接近成功了。
root@hz192-168-1-55:/home# sudo apt-cache policy mysql-server
mysql-server:
Installed: (none)
Candidate: 8.0.30-0ubuntu0.20.04.2
Version table:
8.0.30-0ubuntu0.20.04.2 500
500 http://mirrors.aliyun.com/ubuntu focal-updates/main amd64 Packages
500 http://mirrors.aliyun.com/ubuntu focal-security/main amd64 Packages
8.0.19-0ubuntu5 500
500 http://mirrors.aliyun.com/ubuntu focal/main amd64 Packages
5.7.40-1ubuntu18.04 500
500 http://repo.mysql.com/apt/ubuntu bionic/mysql-5.7 amd64 Packages
安装 MySQL 5.7 版本客户端和服务端,版本信息根据上面的输出自行修改。
sudo apt install mysql-server=5.7.40-1ubuntu18.04
sudo apt install mysql-client=5.7.40-1ubuntu18.04
如无需安装 mysql-client 服务,执行安装 mysql-server 服务,可能会报如下错误。
只需要手动安装 mysql-community-server 即可。sudo apt install mysql-community-server=5.7.40-1ubuntu18.04
The following packages have unmet dependencies:
mysql-server : Depends: mysql-community-server (= 5.7.40-1ubuntu18.04) but it is not going to be installed
- 验证
root@hz192-168-1-55:/home# mysql --version
mysql Ver 14.14 Distrib 5.7.40, for Linux (x86_64) using EditLine wrapper
ok, 完结。踩坑君再次填好一个坑,接着去踩下一个啦。