Command Line Cheatsheet
January 21, 2020
This is a list of all the command line snippets that I often forget or just need to reference once in a while.
As you can probably tell, I don’t use the command line very often. 😳
pwd – print working directory
mkdir – create new directory
touch – create a new file
rm – delete file
use rm -r folderName to delete an entire directory
open – open file
cp – copy file
cp m*.txt scifi/ will copy all the .txt files in the directory you are in currently into the directory named scifi
mv – move file
mv can also be used to rename a file. mv bucks.txt warriors.txt will rename bucks.txt to warriors .txt
nano ~/.bash_profile will get you to the file where you can set keyboard shortcuts
source ~/.bash_profile will initialize the .bash_profile file and allow you to use shortcuts
In .bash_profile alias ll=”ls -la” will assign a a shortcut of ll to ls -la
cal will bring up a small monthly calendar with the current day highlighted
To zip up a file and password protect it: zip -er [archive] [file]
mogrify -format webp *.png will convert any images in the directory from .png to .webp
magick shot.png -encipher passphrase.txt locked.png to encrypt an image. using the same name as the output will overwrite the original image. You could also save it out with a different name as well.
magick locked.png -decipher passphrase.txt unencrypted.png to decipher an image. The contents in the passphrase must match what was in the file originally when it was encrypted.
.jpeg and .gif are not supported when it comes to encrypting and decrypting.
convert shot.png -resize 100px new.png will resize the original image to have a width of 100px. You can also resize with percent (-resize 50%).
git log to see everything that’s going on
git commit –amend -m “new message goes here” to change the commit message
git cherry-pick 8273g8d to bring a commit from a different branch over to a new branch. The numbers are the hash from the commit you want to bring over
git reset –hard 8273g8d to reset a branch back to a certain commit
git clean -df run this after a git reset to clear any untracked files from the staging area. ‘d’ stands for directories and ‘f’ stands for files
git reflog shows a list of the recent actions
git revert 8273g8d creates a new commit that reverts a certain commit (based on the hash). This doesn’t screw up the history because it’s just another commit added to the log and when people pull it down those changes will be applied
git stash save –keep-index and then git stash drop to revert back and drop the changes that you made
brew search tree to search packages. In this case, we are searching for a package named tree.
brew cask firefox to install the program Firefox. Cask programs are usually Mac versions of popular programs.
brew cask home firefox to take you to the homepage of the cask application you are looking to download.
brew list to see all of the programs currently installed via brew.
brew outdated to show all of the outdated programs installed via brew.
brew upgrade to update all the outdated programs installed via brew.
brew cleanup to remove old versions of the outdated programs.
@joekotlan on Twitter