# put stock boot.img into /sdcard/boot.img
# get sha1
adb shell
su
SHA1=$(cat $(magisk --path)/.magisk/config | grep SHA1 | cut -d '=' -f 2)
# repack boot.img.gz
gzip -9f /sdcard/boot-stock.img
# restore backup
mkdir /data/magisk_backup_${SHA1}
mv /sdcard/boot-stock.img.gz /data/magisk_backup_${SHA1}/boot.img.gz
chmod -R 755 /data/magisk_backup_${SHA1}
chown -R root.root /data/magisk_backup_${SHA1}
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December 26, 2025 04:50
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If you already have stock boot.img file in /sdcard you can do the do following and let Magisk do the backup
cd /data/adb/magisk cp /sdcard/boot.img stock_boot.img ./magiskboot cleanup . ./util_functions.sh run_migrations
This is the answer.
The last line run_migrations doesn't work though. But it doesn't matter - at this point you are already able to run the "Restore Images"
Edit: the run_migrations shows an error msg - Unable to find preinit dir. But behind the scene everything should work fine now
This is the answer.
The last linerun_migrationsdoesn't work though. But it doesn't matter - at this point you are already able to run the "Restore Images"
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"/sdcard" is your internal storage