i managed to back up my arch linux suing rsync : # rsync -aAXv --exclude={/dev/*,/proc/*,/sys/*,/tmp/*,/run/*,/mnt/*,/media/*,/lost+found} / /run/media/username/archlinuxedited fstab :## /etc/fstab: static file system information## <file system> <dir>   <type>  <options>       <dump>  <pass># /dev/sda3UUID=d2b779b2-b2b1-48d6-8493-6468f99a0a21       /               ext4            rw,relatime,data=ordered        0 1# /dev/sda6UUID=be9152a7-3178-44ba-b3d8-0448e9dd4c80       /boot           ext4            rw,relatime,data=ordered        0 2# /dev/sda5UUID=5b2ce0ad-9d59-4023-8ca6-f6a6bbdd59e7       none            swap            defaults        0 0>## /etc/fstab: static file system information## <file system> <dir>   <type>  <options>       <dump>  <pass># /dev/sda3UUID=The UUID of the USB drive       /               ext4            rw,relatime,data=ordered        0 1and then regenerated the grub config via grub-mkconfig:sudo grub-mkconfig -o /run/media/username/archlinux/boot/grub/grub.cfgand it returns:Generating grub configuration file ...Found linux image: /boot/vmlinuz-linuxFound initrd image: /boot/initramfs-linux.imgFound fallback initramfs image: /boot/initramfs-linux-fallback.imgFound Windows 10 (loader) on /dev/sda1Found Arch on /dev/sdb1donebut the UUID of /boot/grub/grub.cfg is the UUID of my original partition not my bakcup even though seems like grub is finding  an arch installation on my usb stick  (Found Arch on /dev/sdb1)int the arch linux wiki it is recommended to use mkinitcpio:# mkdir /mnt/arch# mount /dev/sdb3 /mnt/arch# cd /mnt/arch# mount -t proc proc proc/# mount --rbind /sys sys/# mount --rbind /dev dev/# chroot /mnt/arch /bin/bash# mkinitcpio -p linuxbut the UUID is still the same. i have ran this operation many times but i get the same result.it doesn't even load the grub when i boot with my usb, it goes straight to my original grub  not the one installed on the USB. on a different USB it leads to a back screen and i have to remove the USB to see the grub installed on my hard drive. any help would be appreciated
How to reconfigure grub on a backed up arch linux on a USB flash disk
rsync;backup;grub;fstab