Change default location of screenshots

Change default location of your screenshots on Mac

open terminal and write:

defaults write com.apple.screencapture location ~/Documents/Screenshots

Change file type for screenshots

Change the default file type for Mac screenshots

open terminal and write:

defaults write com.apple.screencapture type jpg

[TERMINAL] - Remove last char from filename

Rename all PDF* files inside folder and prevent first 15 chars:

for file in *pdf; do mv "$file" "${file::15}".pdf; done

* you can change this value to other one

ex: 

for doc files prevent 5 first chars

for file in *doc; do mv "$file" "${file::5}".pdf; done