Revise paste Create Custom Linux Mint ISO Live CD

DISISO="$HOME/Downloads/linuxmint-18.3-xfce-64bit.iso"
mkdir ~/livecdtmp
cd ~/livecdtmp
mkdir extract-cd mnt
sudo mount -o loop "$DISISO" mnt
sudo rsync --exclude=/casper/filesystem.squashfs -a mnt/ extract-cd
sudo unsquashfs mnt/casper/filesystem.squashfs
sudo mv squashfs-root edit
sudo cp /etc/resolv.conf edit/etc/
sudo mount --bind /dev/ edit/dev
sudo mount -t devpts devpts edit/dev/pts
sudo mount -t proc proc edit/proc
sudo mount -t sysfs sysfs edit/sys
cd ~/livecdtmp/edit/etc/skel
sudo mkdir Desktop Documents Downloads Music Pictures Public Templates Videos
cd ~/livecdtmp/edit
sudo chroot ~/livecdtmp/edit bash

#####Run These Commands in Chroot#####
export HOME=/root && export LC_ALL=C

###When Complete run these Commands###
apt-get clean
apt-get autoremove
rm -rf /tmp/* ~/.bash_history
exit

###After Eixting Chroot###
sudo umount ~/livecdtmp/edit/proc/sys/fs/binfmt_misc
sudo umount ~/livecdtmp/edit/proc
sudo umount ~/livecdtmp/edit/sys
sudo umount ~/livecdtmp/dev/pts
sudo umount ~/livecdtmp/edit/dev
sudo umount ~/livecdtmp/mnt

echo "Creating ISO"
sleep 3

sudo rm ~/livecdtmp/extract-cd/casper/filesystem.squashfs
cd ~/livecdtmp
sudo mksquashfs edit extract-cd/casper/filesystem.squashfs
sudo vim extract-cd/README.diskdefines
cd ~/livecdtmp/extract-cd
sudo rm MD5SUMS
find -type f -print0 | sudo xargs -0 md5sum | grep -v isolinux/boot.cat | sudo tee MD5SUMS
cd ~/livecdtmp
sudo genisoimage -l -r -J -V "REMASTER" -b isolinux/isolinux.bin -no-emul-boot -boot-load-size 4 -boot-info-table -c isolinux/boot.cat -o ~/REMASTER.iso extract-cd
cd ~
sudo chmod 777 ~/REMASTER.iso