snapshot+systemupdate.sh GI-Joe 7.12.2020

cat  snapshot+systemupdate.sh

#!/bin/bash
#
# Snapshot + System Update
# ---------------------------
# Snapshot - Rollback - Btrfs
# ---------------------------

BTRFS=/usr/bin/btrfs
CP=/usr/bin/cp
ECHO=/usr/bin/echo
GREP=/usr/bin/grep
MOUNT=/usr/bin/mount
MV=/usr/bin/mv
#PIKAUR=/usr/bin/pikaur
PACMAN=/usr/bin/pacman
REFLECTOR=/usr/bin/reflector
SED=/usr/bin/sed
SUDO=/usr/bin/sudo
CHECKUPDATES=/usr/bin/checkupdates

# ---------------------------
#      Snapshot System
# ---------------------------
if $CHECKUPDATES ; then
# if true ; then
bootstate=`$MOUNT | $GREP "on / type btrfs" | $GREP "subvol=/@snapshots/TESTING"`
if [ -z "$bootstate" ]
        then
                $ECHO ""
                $ECHO $bootstate
                $ECHO ""
                $ECHO "System ist nicht mit TESTING hochgefahren !"
                $ECHO "ENDE !"
                sleep 2
                exit 1
        else
        # -------- make new OLDSTABLE --------
                $SUDO $BTRFS subvolume delete /.snapshots/OLDSTABLE
                $SUDO $MV /.snapshots/STABLE /.snapshots/OLDSTABLE
                $SUDO $SED -i 's/STABLE/OLDSTABLE/g' /.snapshots/OLDSTABLE/etc/fstab
                $SUDO $CP /boot/vmlinuz-linux-stable /boot/vmlinuz-linux-oldstable
                $SUDO $CP /boot/initramfs-linux-stable.img /boot/initramfs-linux-oldstable.img
                # $SUDO $CP /boot/vmlinuz-linux-lts-stable /boot/vmlinuz-linux-lts-oldstable
                # $SUDO $CP /boot/initramfs-linux-lts-stable.img /boot/initramfs-linux-lts-oldstable.img

                # --------- make new STABLE ----------
                $SUDO $BTRFS subvolume snapshot / /.snapshots/STABLE
                $SUDO $SED -i 's/TESTING/STABLE/g' /.snapshots/STABLE/etc/fstab
                $SUDO $CP /boot/vmlinuz-linux /boot/vmlinuz-linux-stable
                $SUDO $CP /boot/initramfs-linux.img /boot/initramfs-linux-stable.img
                # $SUDO $CP /boot/vmlinuz-linux-lts /boot/vmlinuz-linux-lts-stable
                # $SUDO $CP /boot/initramfs-linux-lts.img /boot/initramfs-linux-lts-stable.img

                # ---------------------------
                #      Update System
                # ---------------------------
                $SUDO $REFLECTOR -l 10 -p https --sort rate     # initiate 2 ChannelFastSpeed of MagentaHybrid-Router
                $SUDO $REFLECTOR --verbose -l 10 -p https --sort rate --save /etc/pacman.d/mirrorlist
                # $SUDO $PACMAN -Syu
                #$PIKAUR -Syu # aktualisiert AUR gleich mit :-)

                # -------------------------------------------------------------------------------------
                #    disable automatic-search for grub - only 00_header 40_custom 41_custom are needed
                # -------------------------------------------------------------------------------------
                for file in `ls /etc/grub.d/ | grep -v ^4 | grep -v README | grep -v ^00 | grep -v disabled$` ; do
                        $SUDO chmod 644 /etc/grub.d/$file
                        $SUDO mv /etc/grub.d/$file /etc/grub.d/"$file"_disabled
                done

                # --------------------------------------------
                #    Balance Filesystem
                # --------------------------------------------
                $SUDO $BTRFS balance start -dusage=5 /btrfs

fi
else
        echo "Keine Updates vorhanden - ENDE !"
        sleep 2
fi