diff --git a/source/_posts/ASP.NET Core.md b/source/_posts/ASP.NET Core.md
index 7c7934c..e9ef580 100644
--- a/source/_posts/ASP.NET Core.md	
+++ b/source/_posts/ASP.NET Core.md	
@@ -1930,3 +1930,31 @@ public class AggregatorService : Aggregator.AggregatorBase
 }
 ```
 
+# Swagger
+
+## CustomSchemaIds
+
+CustomSchemaIds方法用于自定义SchemaId，Swashbuckle中的每个Schema都有唯一的Id，框架会使用这个Id匹配引用类型，因此这个Id不能重复。
+
+　　默认情况下，这个Id是根据类名得到的（不包含命名空间），因此，当我们有两个相同名称的类时，Swashbuckle就会报错：　　
+
+```
+System.InvalidOperationException: Can't use schemaId "$XXXXX" for type "$XXXX.XXXX". The same schemaId is already used for type "$XXXX.XXXX.XXXX"
+```
+
+　　就是类似上面的异常，一般时候我们都得去改类名，有点不爽，这时就可以使用这个方法自己自定义实现SchemaId的获取，比如，我们自定义实现使用类名的全限定名（包含命名空间）来生成SchemaId，上面的异常就没有了：　　　
+
+```c#
+options.CustomSchemaIds(CustomSchemaIdSelector);
+
+string CustomSchemaIdSelector(Type modelType)
+{
+    if (!modelType.IsConstructedGenericType) return modelType.FullName.Replace("[]", "Array");
+
+    var prefix = modelType.GetGenericArguments()
+        .Select(genericArg => CustomSchemaIdSelector(genericArg))
+        .Aggregate((previous, current) => previous + current);
+
+    return prefix + modelType.FullName.Split('`').First();
+}
+```
diff --git a/source/_posts/Linux.md b/source/_posts/Linux.md
index 1f8e90e..f0a44d5 100644
--- a/source/_posts/Linux.md
+++ b/source/_posts/Linux.md
@@ -474,7 +474,7 @@ flush privileges;
 
 ---
 
-### AlmaLinux 安装
+### AlmaLinux 安装 (dnf包管理器方式)
 
 1. 首先确保系统是最新的。
 
@@ -551,7 +551,93 @@ flush privileges;
     EXIT
     ```
 
-    
+
+### AlmaLinux 安装 (rpm手动方式)
+
+```shell
+mkdir mysql_install
+cd mysql_install
+# 下载安装包
+wget https://cdn.mysql.com/archives/mysql-5.7/mysql-5.7.41-1.el7.x86_64.rpm-bundle.tar
+tar -xvf mysql-5.7.41-1.el7.x86_64.rpm-bundle.tar
+rpm -ivh mysql-community-common-5.7.41-1.el7.x86_64.rpm
+rpm -ivh mysql-community-libs-5.7.41-1.el7.x86_64.rpm
+rpm -ivh mysql-community-libs-compat-5.7.41-1.el7.x86_64.rpm
+rpm -ivh mysql-community-devel-5.7.41-1.el7.x86_64.rpm
+rpm -ivh mysql-community-client-5.7.41-1.el7.x86_64.rpm
+# 如果出现以下错误
+错误：依赖检测失败：
+        libncurses.so.5()(64bit) 被 mysql-community-client-5.7.41-1.el7.x86_64 需要
+        libtinfo.so.5()(64bit) 被 mysql-community-client-5.7.41-1.el7.x86_64 需要
+dnf install libncurses* -y
+# 再次执行 rpm -ivh mysql-community-client-5.7.41-1.el7.x86_64.rpm
+rpm -ivh mysql-community-server-5.7.41-1.el7.x86_64.rpm
+# 如果出现以下提示
+/usr/lib/tmpfiles.d/mysql.conf:23: Line references path below legacy directory /var/run/, updating /var/run/mysqld → /run/mysqld; please update the tmpfiles.d/ drop-in file accordingly.
+vim /usr/lib/tmpfiles.d/mysql.conf
+# 将/var/run/mysqld 改为 /run/mysqld
+# 再次执行 rpm -ivh mysql-community-server-5.7.41-1.el7.x86_64.rpm
+rpm -ivh mysql-community-embedded-compat-5.7.41-1.el7.x86_64.rpm
+
+```
+
+**编辑配置文件**
+
+```shell
+vim /etc/my.cnf
+
+# For advice on how to change settings please see
+# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
+[client]
+port = 3306
+user = mysql
+
+[mysqld]
+#
+# Remove leading # and set to the amount of RAM for the most important data
+# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
+# innodb_buffer_pool_size = 128M
+#
+# Remove leading # to turn on a very important data integrity option: logging
+# changes to the binary log between backups.
+# log_bin
+#
+# Remove leading # to set options mainly useful for reporting servers.
+# The server defaults are faster for transactions and fast SELECTs.
+# Adjust sizes as needed, experiment to find the optimal values.
+# join_buffer_size = 128M
+# sort_buffer_size = 2M
+# read_rnd_buffer_size = 2M
+basedir=/usr/local/mysql
+datadir=/var/lib/mysql
+socket=/var/lib/mysql/mysql.sock
+
+# Disabling symbolic-links is recommended to prevent assorted security risks
+symbolic-links=0
+
+log-error=/var/log/mysqld.log
+pid-file=/var/run/mysqld/mysqld.pid
+
+max_connections = 400
+character-set-server = utf8mb4
+explicit_defaults_for_timestamp = true
+lower_case_table_names = 1
+```
+
+**初始化**
+
+```shell
+mysqld --defaults-file=/etc/my.cnf --initialize-insecure --user=mysql
+# 给mysql用户添加数据目录权限
+chown mysql:mysql /var/lib/mysql -R
+systemctl start mysqld
+systemctl enable mysqld
+
+# 查看root随机生成密码
+grep 'temporary password' /var/log/mysqld.log
+# 若没有提示，则没有密码，可直接登录
+mysql -uroot
+```
 
 ## 配置Java环境变量
 
diff --git a/source/_posts/MySQL.md b/source/_posts/MySQL.md
index 78e92ac..081ca86 100644
--- a/source/_posts/MySQL.md
+++ b/source/_posts/MySQL.md
@@ -45,6 +45,40 @@ mysqldump -uroot -p test --no-data > test.sql
 mysqldump -uroot -p -B test > test.sql
 ```
 
+# Xtrabackup备份数据库
+
+## 安装
+
+### wget方式
+
+1. 安装qpress rpm包。
+   ```shell
+   wget https://repo.percona.com/yum/release/7/RPMS/x86_64/qpress-11-1.el9.x86_64.rpm
+   rpm -ivh qpress-11-1.el9.x86_64.rpm
+   ```
+   
+2. 安装Percona XtraBackup
+
+   - MySQL 5.6、5.7，以下载并安装Percona XtraBackup 2.4.9为例
+     ```shell
+     wget https://downloads.percona.com/downloads/Percona-XtraBackup-2.4/Percona-XtraBackup-2.4.9/binary/redhat/7/x86_64/percona-xtrabackup-24-2.4.9-1.el9.x86_64.rpm
+     
+     rpm -ivh percona-xtrabackup-24-2.4.9-1.el7.x86_64.rpm --nodeps --force
+     ```
+
+   - MySQL 8.0，以下载并安装Percona XtraBackup 8.0为例
+     ```shell
+     wget https://downloads.percona.com/downloads/Percona-XtraBackup-8.0/Percona-XtraBackup-8.0.32-26/binary/redhat/7/x86_64/percona-xtrabackup-80-8.0.32-26.1.el7.x86_64.rpm
+     
+     rpm -ivh percona-xtrabackup-80-8.0.32-26.1.el7.x86_64.rpm --nodeps --force
+     ```
+
+## 恢复
+
+
+
+
+
 # Windows 下安装 绿色版
 
 先下载[MySQL :: Download MySQL Community Server](https://dev.mysql.com/downloads/mysql/)