git clone https://github.com/oudream/hello-shell.git --recursive- Man1 - 用户命令：- Man2 - 系统调用：- Man3 - 库函数：- Man4 - 特殊文件：
- Man5 - 文件格式：- Man6 - 游戏：- Man7 - 宏：- Man8 - 维护命令：
- https://www.opengroup.org/
- http://pubs.opengroup.org/onlinepubs/9699919799/
- https://www.linux.org/
- https://www.kernel.org/
- https://www.archlinux.org/
- https://developers.redhat.com/
- https://www.centos.org/
- https://www.cygwin.com/
- https://getfedora.org/
- https://wiki.ubuntu.org.cn/UbuntuManual
- https://www.debian.org/doc/user-manuals
- https://wangchujiang.com/linux-command/
- https://github.com/tldr-pages/tldr
- https://debian-handbook.info/browse/zh-CN/stable/index.html