Useful commands

commands.sh

# Batch resize and rename images
for x in *.png; do root=`echo $x | sed -e "s/.png//"`; convert $x -resize 200x200 ${root}-200x200.png; done
for x in *.jpg; do root=`echo $x | sed -e "s/.jpg//"`; convert $x -resize 48x48 ${root}-48x48.jpg; done

# Create Sierra USB Install Disk
sudo /Applications/Install\ macOS\ Sierra.app/Contents/Resources/createinstallmedia \
  --volume /Volumes/Untitled --applicationpath /Applications/Install\ macOS\ Sierra.app
  
## Linux

# Get OS install date
sudo dumpe2fs $(mount | grep 'on \/ ' | awk '{print $1}') | grep 'Filesystem created:'