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/

# tac命令用法

tac默认倒序显示文件内容

```sh
$ tac push.sh
sleep 3s
echo "Done!"
sleep 3s
git push
git commit -m "update"
git add .
rm -rf resources/ public/ .hugo_build.lock
```
对比下`cat`的输出

```sh
$ cat push.sh
rm -rf resources/ public/ .hugo_build.lock
git add .
git commit -m "update"
git push
sleep 3s
echo "Done!"
sleep 3s
```
可以使用`-r -t`来使用正则表达式改变输出规则，如下逆序翻转所有字符
```sh
$ tac -r -s 'x\|[^x]' push.sh

s3 peels
"!enoD" ohce
s3 peels
hsup tig
"etadpu" m- timmoc tig
. dda tig
kcol.dliub_oguh. /cilbup /secruoser fr- mr

```