Centos 的常用命令总结

设置静态IP和DNS

vim /etc/sysconfig/network-scripts/ifcfg-[网卡名称]

修改
BOOTPROTO=static
添加
IPADDR=192.168.1.188
NETMASK=255.255.255.0
GATEWAY=192.168.1.1

 vim /etc/resolv.conf

输入
nameserver 8.8.8.8

关闭防火墙

#查看防火墙状态
systemctl status firewalld.service
#关闭防火墙
systemctl stop firewalld.service
#禁止开启启动
systemctl disable firewalld.service

 

快速安装MySQL

#下载并安装MySQL官方的Yum Repository
wget -i -c https://repo.mysql.com/mysql57-community-release-el7-10.noarch.rpm
wget -i -c http://dev.mysql.com/get/mysql57-community-release-el7-10.noarch.rpm
wget -i -c https://repo.mysql.com/mysql57-community-release-el7-10.noarch.rpm

yum -y install mysql57-community-release-el7-10.noarch.rpm
yum -y install mysql-community-server
#启动MySQL
systemctl start  mysqld.service
systemctl status mysqld.service
#找到默认初始密码
grep "password" /var/log/mysqld.log
#登录MySQL
mysql -uroot -p
#查看并修改密码的校验规则
mysql>show variables like 'validate_password%';
mysql> set global validate_password_policy=0;
mysql> set global validate_password_length=1;
#修改密码
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'new password';
#卸载Yum Repository
yum -y remove mysql57-community-release-el7-10.noarch
#开启远程登录权限
#任何主机
mysql>GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION;
#指定主机
mysql>GRANT ALL PRIVILEGES ON *.* TO 'jack'@’10.10.50.127’ IDENTIFIED BY '654321' WITH GRANT OPTION;
# 然后刷新权限
mysql>flush privileges;
#修改mysql数据库总的user表使相的用户能从某一主机登录
mysql>use mysql;
mysql>update user set host = '%' where user = 'root';
mysql>select host, user from user;
#查看mysql的字符集
mysql>show variables like 'character_set%';
#字符集改成UTF-8
vim /etc/my.cnf
[client]
port=3306
socket=/var/lib/mysql/mysql.sock
default-character-set=utf8

[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
character-set-server=utf8

[mysql]
no-auto-rehash
default-character-set=utf8

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
#重启MySQL服务
systemctl restart mysqld

下载并安装MySQL官方的Yum Repository