UNIX Publication

- Debian: http://unix.pub/docs/debian/
- APT用法: http://unix.pub/docs/debian/apt_usage/
- dpkg用法: http://unix.pub/docs/debian/dpkg_usage/
- Debian发行版: http://unix.pub/docs/debian/DebianReleases/
- Debian基本命令备忘录: http://unix.pub/docs/debian/Debian-Basic-Command-Memo/
- Debian软件包: http://unix.pub/docs/debian/debian_packages/
- Distribution: http://unix.pub/docs/distributions/
- Waydog Linux: http://unix.pub/docs/distributions/Waydog/
- Lilidog Linux: http://unix.pub/docs/distributions/Lilidog/
- GNU核心工具: http://unix.pub/docs/coreutils/
- base32命令用法: http://unix.pub/docs/coreutils/base32_usage/
- base64命令用法: http://unix.pub/docs/coreutils/base64_usage/
- basenc命令用法: http://unix.pub/docs/coreutils/basenc_usage/
- cat命令用法: http://unix.pub/docs/coreutils/cat_usage/
- fmt命令用法: http://unix.pub/docs/coreutils/fmt_usage/
- fold命令用法: http://unix.pub/docs/coreutils/fold_usage/
- head命令用法: http://unix.pub/docs/coreutils/head_usage/
- nl命令用法: http://unix.pub/docs/coreutils/nl_usage/
- od命令用法: http://unix.pub/docs/coreutils/od_usage/
- pr命令用法: http://unix.pub/docs/coreutils/pr_usage/
- tac命令用法: http://unix.pub/docs/coreutils/tac_usage/
- Linux文档: http://unix.pub/docs/LinuxDoc/
- DAE用法: http://unix.pub/docs/LinuxDoc/dae_usage/
- Linux透明代理: http://unix.pub/docs/LinuxDoc/Linux_Transparent_proxy/
- OpenWrt: http://unix.pub/docs/openwrt/
- RaspberryPi: http://unix.pub/docs/raspberrypi/
- WDMyCloud vs Debian: http://unix.pub/docs/WDMyCloud/
- WD MyCloud Home安装运行Debian 11: http://unix.pub/docs/WDMyCloud/Running-Debian-11-on-WD-MyCloud-Home/
- WD MyCloud安装Debian Jessie: http://unix.pub/docs/WDMyCloud/Install-Debian-Jessie-on-WD-MyCloud-Gen1/
- WDMycloud救砖: http://unix.pub/docs/WDMyCloud/WDMycloud_Recovery/
- WDMycloud安装Debian: http://unix.pub/docs/WDMyCloud/WDMycloud_Crack_install_debian/

# cat命令用法

显示文件内容
```sh
$ cat push.sh
#!/bin/bash
TIMESTAMP=$(date +%s)
rm -rf resources/ public/ .hugo_build.lock
git add .
git commit -m "update: ${TIMESTAMP}"
git push
sleep 3s
echo "Done! Commit${TIMESTAMP}"
sleep 3s
```
附带显示行号
```sh
$ cat -n push.sh
     1  #!/bin/bash
     2  TIMESTAMP=$(date +%s)
     3  rm -rf resources/ public/ .hugo_build.lock
     4  git add .
     5  git commit -m "update: ${TIMESTAMP}"
     6  git push
     7  sleep 3s
     8  echo "Done! Commit${TIMESTAMP}"
     9  sleep 3s

```
显示非打印字符，比如换行、TAB等
```sh
$ cat push.sh -v
#!/bin/bash^M
TIMESTAMP=$(date +%s)^M
^M
rm -rf resources/ public/ .hugo_build.lock^M
git add .^M
git commit -m "update: ${TIMESTAMP}"^M
git push^M
sleep 3s^M
echo "Done! Commit${TIMESTAMP}"^M
sleep 3s^M

```

`cat`不带任何选项，意思将标准输入(显示器)输出到标准输出(显示器)，如下：

```sh
$ cat
这是我输入的第一行
这是我输入的第一行
这是我 输入的第二行内容
这是输入的第二行内容
这是我输入的第三行内容
这是我输入的第三行内容
这是我输入 第四行数字
这是我输入第四行数字
```
第二行和第四行我输入时使用了删除键删除字符，删除键输出不显示