由於mysql5.1.71存在大量的漏洞，本文記錄如何從5.1.71升級到mysql80.21
1、查看mysql的安裝
sudo -s
rpm -qa|grep mysql
2、卸載安裝及清理配置
rpm -e --nodeps 上述查看到的安裝
whereis mysql
rm /etc/my.cnf
rm /etc/my.cnf.rpmsave
rm -rf /var/lib/mysql
rm -rf /usr/lib64/mysql
rm /var/log/mysqld.log
find / -name mysql
所有查詢到的都刪除
3、離線安裝mysql
tar -xvf mysql-8.0.21-1.el6.x86_64.rpm-bundle.tar
rpm -ivh mysql-community-common-8.0.21-1.el6.x86_64.rpm
rpm -ivh mysql-community-libs-8.0.21-1.el6.x86_64.rpm
rpm -ivh mysql-community-client-8.0.21-1.el6.x86_64.rpm
rpm -ivh mysql-community-server-8.0.21-1.el6.x86_64.rpm
rpm -qi mysql-community-server-8.0.21-1.el6.x86_64
vim /etc/my.cnf
datadir=/data/var/lib/mysql
socket=/data/var/lib/mysql/mysql.sock
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
sql_mode='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION'
max_connections=1000
innodb_flush_log_at_trx_commit=0
innodb_autoextend_increment=128
innodb_buffer_pool_size=4g
innodb_log_file_size=1g
max_allowed_packet=64m
tmp_table_size = 1024M
max_heap_table_size = 1024M
character-set-server = utf8
collation-server = utf8_general_ci
##設置不區分大小寫
lower_case_table_names=1
##設置時區（不設置可能導致select now()與當前時間不一致）
default_time_zone=+8:00
[client]
default-character-set = utf8
socket=/data/var/lib/mysql/mysql.sock
service mysqld start
service mysqld status
#/etc/init.d/mysqld {start|stop|status|restart|condrestart|try-restart|reload|force-reload}
chkconfig mysqld on
4、初始化及配置賬號
grep 'temporary password' /var/log/mysqld.log
mysql -uroot -p
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '密碼'
ALTER USER 'root'@'localhost' PASSWORD EXPIRE NEVER;
use mysql;
select host,user,authentication_string,plugin from user;
CREATE USER 'root'@'%' IDENTIFIED WITH mysql_native_password BY '密碼';
ALTER USER 'root'@'%' PASSWORD EXPIRE NEVER;
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' WITH GRANT OPTION;
FLUSH PRIVILEGES;
quit