Some CLI Commands that I’ve found useful:
Viewing processes and killing them
$ lsof -Pi | grep LISTEN
- Displays processes running and ports
- The PID is the second number (2nd column from left)
$ kill -9 $PID
- This kills the process at the entered PID with extreme prejudice
Using find
$ find . -name '*.css'
- This will recurse all directories and list all CSS files (and directories ending with “.css”) under the current directory (represented by “.”)
$ find . -type f -name '*.css'
- This will only match CSS files (case-sensitively)
$ find . -name "*.css" -exec grep -l "#content" {} \;
- This example finds all CSS files that do something with your HTML ID #content
$ find . -mtime -1 -type f
- find files changed in the last 1 day
$ find . \! -path "*CVS*" -type f -name "*.css"
- find CSS files, omitting results containing “CVS”
$ find ~/src -newer main.css
- find files newer than main.css in ~/src
$ find . -name \*.css -print0 | xargs -0 grep -nH foo
- combine with xargs for more power than -exec
Deleting a folder and it’s contents
Please use carefully
$ rm -rf [folder_name]
- Always include a folder name
Copying a folder and contents
$ cp -avr /from/folder /to/new_folder
- -a : Preserve the specified attributes such as directory an file mode, ownership, timestamps, if possible additional attributes: context, links, xattr, all.
- -v : Explain what is being done (verbose).
- -r : Copy directories recursively.
What is grep
- It is a command that finds text/strings inside of files
It can take regular expressions
recurse through a directory
$ grep -r 'lookforthisexpression' files/*
- case insensitive search
$ grep -i 'anycaseterm' file.txt
Make a file (…for testing…)
- mkfile command
- input number, then size (i.e. k for kb or g for gb), then filename
$ mkfile -n [size][b|k|m|g] [filename]
Heroku commands
- Get to the console/bash on the remote server
$ heroku run bash --app [put_app_name_here]
Compiling bash scripts
$ chmod +x ./[bash_script.sh]
Redirect to port 80 on linux server
$ sudo iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 3000
