1:安装cenos7时用户名一定不要为root(否则会出现视觉错误)
cenos7安装mysql8.0详细步骤
2:安装mysql时经量使用国内的yum云,因为速度快
如果启动mysql失败
1.查看错误的代码
执行journalctl -xe看关于mysql有关的问题
2.如果不行建议卸载mysql重新安装
卸载步骤
1.关闭mysql
[root@localhost /]# service mysqld stop
Redirecting to /bin/systemctl stop mysqld.service
2.查看mysql安装情况
[root@localhost /]# rpm -qa|grep -i mysql
mysql-community-server-8.0.19-1.el7.x86_64
mysql-community-common-8.0.19-1.el7.x86_64
mysql80-community-release-el7-3.noarch
mysql-community-client-8.0.19-1.el7.x86_64
mysql-community-libs-8.0.19-1.el7.x86_64
3.卸载
执行命令删除安装的MySQL
[root@localhost /]# rpm -ev mysql-community-client-8.0.13-1.el7.x86_64
报错:error: Failed dependencies:
mysql-community-client(x86-64) >= 8.0.0 is needed by (installed) mysql-community-server-8.0.13-1.el7.x86_64
原
因是依赖包错误,再执行以下命令解决:
[root@localhost /]# rpm -ev mysql-community-client-8.0.13-1.el7.x86_64 --nodeps
剩余几个也按照上述操作执行,加上 --nodeps
再执行 # rpm -qa|grep -i mysql 命令,查看是否删除成功。
[root@localhost /]# find / -name mysql
/var/lib/mysql
/var/lib/mysql/mysql
/usr/lib64/mysql
/usr/share/mysql
[root@localhost /]# rm -rf /var/lib/mysql
[root@localhost /]# rm -rf /var/lib/mysql/mysql
[root@localhost /]# rm -rf /usr/lib64/mysql
[root@localhost /]# rm -rf /usr/share/mysql
4:删除my.cnf
卸载后/etc/my.cnf不会删除,需要进行手工删除
[root@localhost /]# rm -rf /etc/my.cnf
最后查看一下是否卸载完毕,无结果说明卸载完成。
[root@localhost /]# rpm -qa|grep -i mysql