[dd: Write to Disk/Create Swapfile] #dd #pv #status #progress #swapfile #swap

swapfile.sh

#!/usr/bin/env sh

dd status=progress if=/dev/zero of=/swapfile status=progress bs=1024 count=$[(1024**2)*4] && sync # 4G
chmod 0600 /swapfile
mkswap -L swap /swapfile
swapon /swapfile

usb.sh

#!/usr/bin/env sh

##### MACOS #####
brew install gnutls && brew install pv
dd bs=1024 if=$(ls | grep linux-minimal*.iso) | pv -s <size><K|M|G> | dd bs=1024 of=/dev/disk<number> && sync # or gdd bs=1024 status=progress if=$(ls | grep linux-minimal*.iso) of=/dev/<disk> && sync

##### LINUX #####
dd bs=1024 status=progress if=$(ls | grep linux-minimal*.iso) of=/dev/<disk> && sync

##### DD + PV #####
function ddpv {
	# Inputs:
   	#		$1 - file or grep pattern to locate a disk image file
    # 		$2 - file or disk device to write disk image file to
    
    if [ -z $1 ]; then
    	echo 'Please supply a file or a grep pattern to locate a disk image file'
		exit 1
    elif [ -z $2 ]; then
    	echo 'Please supply a file or disk device to write disk image file to'
		exit 1   
	fi

    if [ -e $1]; then
    	FILENAME_IN="$1"
    	SIZE=$(stat --format=%s $1)
    else
    	FILESTAT="$(/bin/ls -l . | grep $1)"
    	FILENAME_IN="$(echo $FILESTAT | awk '{print $9}')"
    	SIZE="$(echo $FILESTAT | awk '{print $5}')"
    fi
    
    FILENAME_OUT="$2"
    
	dd if="$FILENAME_IN" | pv -s $SIZE | sudo dd of="FILENAME_OUT"; sync
}