Linux Useful Tools - norxiva/bunin GitHub Wiki
sudo apt install axel
axel -n <thread number> <url>
scp <localfile> <username>:<remote_ip>:<remote_path>
ssh-keygen -t rsa
# press enter key straightly
cat <pub file> >> ~/.ssh/authorized_keys
sudo apt install xclip
ls -al | xclip
pwd | xclip
xclip /etc/apt/source.list
xclip -o
xclip -o > ~/output.txt
https://www.cnblogs.com/yangmingxianshen/p/7967040.html
https://www.cnblogs.com/scue/p/4028735.html
https://www.cnblogs.com/arlenhou/p/learn_expect.html
http://www.jb51.net/article/119541.htm
https://likegeeks.com/expect-command/