update

README.md

@@ -44,6 +44,7 @@
 - [Calibre-web电子书网站的使用](doc/Calibre-web的使用.md)
 - [ike-scan扫描服务端的ike加密算法](doc/ike-scan扫描服务端的ike加密算法.md)
 - [用 LinqPad 进行快速开发](doc/LinqPad快速开发数据轮询持久化.md)
+- [用Quartz.net开发定时调度]
 
 
 

doc/常用命令行.md

@@ -98,7 +98,7 @@ root@ubuntu:/# sudo du -hsx * | sort -rh | head -10
 5.3M	run
 ```
 
-### mysql 主从复制状态查询
+### MySQL 主从复制状态查询
 
 Start the MySQL command-line utility on the slave server:
 
@@ -114,3 +114,65 @@ Check the replication status using the show slave status command (the status of
 mysql> SHOW SLAVE STATUS \G;
 ```
 
+### MySQL 从服务启停
+
+```shell
+start slave;
+stop slave;
+```
+
+### MySQL 8.0 caching_sha2_password认证
+
+MySQL 从8.0 版本以后默认使用 `caching_sha2_password plugin` 进行身份验证，之前的版本默认使用 `mysql_native_password plugin` 进行身份验证的客户端连接 8.0 时会报错，在 `caching_sha2_password plugin` 下修改用户密码的语句如下：
+
+登录后执行
+
+```sql
+ALTER USER user
+  IDENTIFIED WITH caching_sha2_password
+  BY 'password';
+```
+
+将密码验证回复成`caching_sha2_password plugin`的语句如下：
+
+登录后执行
+
+```shell
+use mysql;
+select host,user,plugin from user;
+```
+
+打印如下
+
+```shell
++-----------+------------------+-----------------------+
+| host | user | plugin |
++-----------+------------------+-----------------------+
+| localhost | mysql.infoschema | caching_sha2_password |
+| localhost | mysql.session | caching_sha2_password |
+| localhost | mysql.sys | caching_sha2_password |
+| localhost | root | caching_sha2_password |
++-----------+------------------+-----------------------+
+4 rows in set (0.00 sec)
+```
+
+执行语句修改plugin为`mysql_native_password plugin` 
+
+```shell
+ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '你的密码';  flush privileges;
+```
+
+打印如下
+
+```shell
++-----------+------------------+-----------------------+
+| host | user | plugin |
++-----------+------------------+-----------------------+
+| localhost | mysql.infoschema | caching_sha2_password |
+| localhost | mysql.session | caching_sha2_password |
+| localhost | mysql.sys | caching_sha2_password |
+| localhost | root | mysql_native_password |
++-----------+------------------+-----------------------+
+4 rows in set (0.00 sec)
+```
+