#Directories
mkdir <dirname>
cd <dirname>
pwd #tells you where you currently are.

#Files
ls
ls -l
ls -a
touch <filename>
mv <filename1> <filename2>
cp <filename1> <filename2>
rm <filename>

npm login  
npm whoami  #check login
npm install <package_name>
npm init  
npm init --yes #for default
npm update 
remove a package  
npm uninstall <package> 

git status
git add .
git commit  -m "message"
git push origin master

jupyter notebook
bundle exec jekyll serve
python3 -m http.server
ffmpeg -i 18.mp4 -ss 01:09:00 -t 01:33:20 -c copy 184.mp4
synclient TouchpadOff=1
hello