• pwd - shows the current directory path

  • ls - lists the files in the current path

  • touch <filename.extension> - creates a new file in the current path

  • cd <path> - checkout to the path

Terminal command - Navigate

  • ctrl + a - to move the cursor to the beginning of the line

  • ctrl + e - to move the cursor to the end of the line

Terminal command - Delete

  • ctrl + w - to delete the last word

  • ctrl + u - to delete all the way back to the start of the line

  • ctrl + k - to delete to the end of the line


  • sudo chgrp -R admin /usr/local - set write permission for admin for certain dir

  • sudo chown -R $(whoami) /usr/local - makes /usr/local writeable for the user


Find port usage

 ps -ef | grep puma

Kill all processes running on a port

lsof -ti:9000 | xargs kill 

where 9000 is the port number here


  • ctrl + r - Search through the command history (after pressing, type to search, press ctrl-r repeatedly to cycle through more matches, press Enter to execute the found command, or hit the right arrow to put the result in the current line to allow editing)

Open VSCode from the terminal

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