sudo /sbin/alsa force-reload

dconf reset -f /org/gnome/

sudo /etc/init.d/gdm3 restart

sudo -E vim file

find /当前目录 -type f ! -name "file"|xargs rm -f

find /当前目录 -type f ! -name "file" -exec rm -f {} \

find ./ -name "*.java" | xargs rm -rfv

rename 's/原内容/改后内容/' *

tar czvf FileName.tar DirName

du -h --max-depth=1 .

cp -frp new/* old/

dpkg -l|grep filename

dpkg -r filename

dpkg -P filename

dpkg -l | grep ^rc | cut -d' ' -f3 | sudo xargs dpkg --purge

du -d1 -b -a .
du -d0 -m .

cat $file | head -n +6
``` 

[详细](https://blog.csdn.net/NFR413/article/details/78966085)

## curl

- 下载`$file`

```bash
curl -O $pathtofile

echo $[1 == 2]

<ctrl+z>

jobs

fg %N
bg %N

ln -s $exists $new

find -maxdepth 10 -type f | xargs wc -l
wc -l `find -name '*.*'`

sudo chmod -R 777 *
sudo chown -R user * # sudo chown -R user:usergroup *