diff --git a/ubuntu-sources-22.04.md b/ubuntu-sources-22.04.md
deleted file mode 100644
index 82bcf94..0000000
--- a/ubuntu-sources-22.04.md
+++ /dev/null
@@ -1,35 +0,0 @@
-备份 source.list 文件
-```
-cp /etc/apt/sources.list /etc/apt/sources.list.bak
-```
-```
-vim /etc/apt/sources.list
-```
-
-复制粘贴
-```
-deb http://mirrors.aliyun.com/ubuntu/ jammy main restricted universe multiverse
-deb http://mirrors.aliyun.com/ubuntu/ jammy-updates main restricted universe multiverse
-deb http://mirrors.aliyun.com/ubuntu/ jammy-backports main restricted universe multiverse
-deb http://mirrors.aliyun.com/ubuntu/ jammy-security main restricted universe multiverse
-```
-
-更新
-```
-apt update
-```
-
-升级现有软件包（可选）
-```
-apt upgrade
-```
-
-修改 PPA 和第三方源（如果有的话）
-```
-/etc/apt/sources.list.d/
-```
-
-替换 ppa 文件的URL，一般将 ppa.launchpad.net 修改为 ppa.mirrors.aliyun.com
-```
-deb http://ppa.mirrors.aliyun.com/ppa/username/repositoryname/ jammy main
-```
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