Various terminal commands that I don't wanna remember

Super Powers

Let there be life!
# create directory named george
mkdir george
# create file with name george
touch george
# edit file
nano george
# edit with vi
vi george
# check for updates
sudo apt-get update
# upgrade
sudo apt-get upgrade
# install new package
sudo apt-get install new_package
# cleanup
sudo apt-get autoremove
# Fix missing keys
sudo apt-key adv --keyserver --recv-keys 4B8EC3BAABDC4346
# find process running on port 5000
sudo lsof -i tcp:5000
# kill a process with pid 1990
kill -9 1990
# find and kill a process running on port 5000
sudo kill $( sudo lsof -i tcp:5000 -t )
# kill all processes named Google Chrome Helper
killall -9 "Google Chrome Helper"
# check docker usage
sudo docker stats
# check process usage
# check memory usage
free -h
# check disk usage
df -lh
# list all directories in current folder with their size
du -h
# full process tree
ps -axfo pid,uname,cmd
# check application certificate
spctl -a -vv /Applications/Google\
# /Applications/Google accepted
# source=Notarized Developer ID
# origin=Developer ID Application: Google, Inc. (EQHXZ8M8AV)
# gzip compression on a tar archiv: tar_file files_or_folder_to_be_compressed
tar cvzf my-files.tar.gz ./my-files
# unzip a tar file
tar xvzf my-files.tar.gz
# Find a file by name on your machine
sudo find / -name 'secret.txt'
# delete backup files
sudo find . -name "*.bak" -delete
# delete all local branches except main, master and develop
git branch | grep -v "main" | grep -v "master" | grep -v "develop" | xargs git branch -D
Virtual Screen
# Note: you will still need to install all the dependencies for xvfb to run
xvfb-run --server-args='-screen 0 1024x768x24' node src
apt-get update && apt-get install -yq gconf-service libasound2 libatk1.0-0 libatk-bridge2.0-0 libc6 libcairo2 libcups2 libdbus-1-3 libexpat1 libfontconfig1 libgcc1 libgconf-2-4 libgdk-pixbuf2.0-0 libglib2.0-0 libgtk-3-0 libnspr4 libpango-1.0-0 libpangocairo-1.0-0 libstdc++6 libx11-6 libx11-xcb1 libxcb1 libxcomposite1 libxcursor1 libxdamage1 libxext6 libxfixes3 libxi6 libxrandr2 libxrender1 libxss1 libxtst6 ca-certificates fonts-liberation libappindicator1 libnss3 lsb-release xdg-utils wget x11vnc x11-xkb-utils xfonts-100dpi xfonts-75dpi xfonts-scalable xfonts-cyrillic x11-apps xvfb
apt-get update && apt-get install -y wget --no-install-recommends \
&& wget -q -O - | apt-key add - \
&& sh -c 'echo "deb [arch=amd64] stable main" >> /etc/apt/sources.list.d/google.list' \
&& apt-get update \
&& apt-get install -y google-chrome-unstable fonts-ipafont-gothic fonts-wqy-zenhei fonts-thai-tlwg fonts-kacst ttf-freefont \
--no-install-recommends \
&& rm -rf /var/lib/apt/lists/* \
&& apt-get purge --auto-remove -y curl \
&& rm -rf /src/*.deb
# For loop using counter
for COUNTER in `seq 1 10`;
echo The counter is $COUNTER
# For loop using other values
for i in $( ls ); do
echo item: $i
while [ $COUNTER -lt 10 ]; do
echo The counter is $COUNTER
until [ $COUNTER -lt 10 ]; do
let COUNTER-=1