Useful bash commands

useful_bash_commands.md

Useful bash commands

A handful of helpful commands I've found for shell operations (works with Bash or Zsh).

1. du -sh . Print how much memory the current folder (and everything within it) is taking up on disk.
   • du stands for disk usage, -sh asks for the info to be summarised in a human readable format.
   • output examples: 178M . or 1.2G . (178 megabytes and 1.36 Gigabytes respectively)
2. lsof -i:8080
   • List the processes (or files) running on port 8080
   • lsof stands for list open files
   • In posix systems all processes are considered files, so this works for e.g. server processes etc.
   • The output will give you the PID (process ID) of the process
   • If you then want to kill the process you can enter kill <insert PID here>.
3. find . -name *.kt -- search current folder (recursively) for all files with a given filename ending (in this case .kt)
   • find is a tool for working with file hierarchies
   • This will give you a list of the relative paths of the files from the current directory.
   • The * is a wildcard character matching all text before .kt