实际上就是安装MySQL的client即可。

网上直接yum install mysql-client肯定是不行的。

参照：https://blog.csdn.net/zp8126/article/details/137084854

上面文章是安装的MySQL server，但是我们是安client，具体步骤如下：

wget http://dev.mysql.com/get/mysql80-community-release-el7-8.noarch.rpm

下载repo包，然后安装，rpm或者yum localinstall都可以。

下一步：

yum install -y mysql-community-client --skip-broken --nogpgcheck

安装成功。通过命令查看安装情况：

[root@ecm-be41 bin]# rpm -qa |grep mysql

mysql-community-client-plugins-8.0.36-1.el7.x86_64

mysql-community-common-8.0.36-1.el7.x86_64

mysql-community-libs-8.0.36-1.el7.x86_64

mysql-community-client-8.0.36-1.el7.x86_64

mysql80-community-release-el7-8.noarch

mysql-community-libs-compat-8.0.36-1.el7.x86_64

[root@ecm-be41 bin]# mysqldump 

Usage: mysqldump [OPTIONS] database [tables]

OR     mysqldump [OPTIONS] --databases [OPTIONS] DB1 [DB2 DB3...]

OR     mysqldump [OPTIONS] --all-databases [OPTIONS]

For more options, use mysqldump --help

[root@ecm-be41 bin]# 

文中省略了两个错误，就是yum命令中带的那两个参数，也说说，第一个--skip-broken

没有这个参数的话，会报错：

Error: Package: mysql-community-client-8.0.36-1.el9.x86_64 (/mysql-community-client-8.0.36-1.el9.x86_64)

           Requires: libstdc++.so.6(GLIBCXX_3.4.20)(64bit)

Error: Package: mysql-community-client-8.0.36-1.el9.x86_64 (/mysql-community-client-8.0.36-1.el9.x86_64)

           Requires: libc.so.6(GLIBC_2.33)(64bit)

 You could try using --skip-broken to work around the problem

** Found 2 pre-existing rpmdb problem(s), 'yum check' output follows:

ctcss-agent-3.5.5-1.el8.x86_64 is a duplicate with ctcss-agent-3.4.5-1.el7.x86_64

ctcss-agent-3.7.4-1.el7.x86_64 is a duplicate with ctcss-agent-3.5.5-1.el8.x86_64

没有第二个参数，--nogpgcheck，会报错：

Downloading packages:

warning: /var/cache/yum/x86_64/7/mysql80-community/packages/mysql-community-client-plugins-8.0.36-1.el7.x86_64.rpm: Header V4 RSA/SHA256 Signature, key ID a8d3785c: NOKEY

Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql-2022

Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql





The GPG keys listed for the "MySQL 8.0 Community Server" repository are already installed but they are not correct for this package.

Check that the correct key URLs are configured for this repository.





 Failing package is: mysql-community-client-plugins-8.0.36-1.el7.x86_64

 GPG Keys are configured as: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql-2022, file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql