centos mysql 安裝以及解除安裝重新安裝

檢視是否還有mysql軟體

rpm -qa | grep mysql

# 解除安裝mysql相關依賴
yum remove mysql mysql-server mysql-libs mysql-server;

find / -name mysql

rm /etc/my.cnf
rm -rf /usr/lib/mysql
rm -rf /usr/share/mysql

shell> wget

# 安裝mysql源

shell> yum localinstall mysql57-community-release-el7-8.noarch.rpm

# 檢查mysql源是否安裝成功

yum repolist enabled | grep "mysql.*-community.*" 安裝

yum install -y mysql mysql-server mysql-libs mysql-server

systemctl start  mysqld.service

systemctl status mysqld.service
# 配置檔案
vim /etc/my.cnf
# mysqld下增加如下內容
skip-grant-tables
character_set_server=utf8
init_connect='set names utf8'
# 重啟mysql服務
systemctl start mysqld.service

# 設定乙個密碼

update mysql.user set authentication_string=password('123abcabc.') where user='root';
flush privileges;
grant all privileges on *.* to 'root'@'%' identified by '123abcabc.' with grant option
flush privileges;

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