diff --git a/jni/magiskboot/main.c b/jni/magiskboot/main.c
index 7b2402463..9a00ba3d4 100644
--- a/jni/magiskboot/main.c
+++ b/jni/magiskboot/main.c
@@ -68,8 +68,8 @@ int main(int argc, char *argv[]) {
 		mmap_ro(argv[2], (unsigned char **) &buf, &size);
 		SHA1(sha1, buf, size);
 		for (int i = 0; i < 20; ++i)
-			fprintf(stderr, "%02x", sha1[i]);
-		fprintf(stderr, "\n");
+			printf("%02x", sha1[i]);
+		printf("\n");
 		munmap(buf, size);
 	} else if (argc > 2 && strcmp(argv[1], "--unpack") == 0) {
 		unpack(argv[2]);
diff --git a/scripts/boot_patch.sh b/scripts/boot_patch.sh
index 1afc93905..6fcb0a18a 100644
--- a/scripts/boot_patch.sh
+++ b/scripts/boot_patch.sh
@@ -3,11 +3,11 @@
 #
 # Magisk Boot Image Patcher
 # by topjohnwu
-# 
+#
 # This script should be placed in a directory with the following files:
-# 
+#
 # File name       type      Description
-# 
+#
 # boot_patch.sh   script    A script to patch boot. Expect path to boot image as parameter.
 #               (this file) The script will use binaries and files in its same directory
 #                           to complete the patching process
@@ -19,7 +19,7 @@
 #                           All magisk entrypoints are defined here
 # chromeos        folder    This folder should store all the utilities and keys to sign
 #               (optional)  a chromeos device, used in the tablet Pixel C
-# 
+#
 # If the script is not running as root, then the input boot image should be a stock image
 # or have a backup included in ramdisk internally, since we cannot access the stock boot
 # image placed under /data we've created when previously installing
@@ -147,7 +147,7 @@ case $? in
   0 )  # Stock boot
     ui_print_wrap "- Stock boot image detected!"
     ui_print_wrap "- Backing up stock boot image"
-    SHA1=`./magiskboot --sha1 "$BOOTIMAGE" | tail -n 1`
+    SHA1=`./magiskboot --sha1 "$BOOTIMAGE" 2>/dev/null`
     STOCKDUMP=stock_boot_${SHA1}.img
     dd if="$BOOTIMAGE" of=$STOCKDUMP
     ./magiskboot --compress $STOCKDUMP
diff --git a/scripts/flash_script.sh b/scripts/flash_script.sh
index cda9c8306..a5153cf8d 100644
--- a/scripts/flash_script.sh
+++ b/scripts/flash_script.sh
@@ -3,7 +3,7 @@
 #
 # Magisk Flash Script
 # by topjohnwu
-# 
+#
 # This script will detect, construct the environment for Magisk
 # It will then call boot_patch.sh to patch the boot image
 #
@@ -87,7 +87,7 @@ find_boot_image
 ##########################################################################################
 
 ui_print "- Constructing environment"
-  
+
 is_mounted /data && MAGISKBIN=/data/magisk || MAGISKBIN=/cache/data_bin
 
 # Copy required files
@@ -152,7 +152,7 @@ ui_print "- Found Boot Image: $BOOTIMAGE"
 
 # Update our previous backup to new format if exists
 if [ -f /data/stock_boot.img ]; then
-  SHA1=`$MAGISKBIN/magiskboot --sha1 /data/stock_boot.img | tail -n 1`
+  SHA1=`$MAGISKBIN/magiskboot --sha1 /data/stock_boot.img 2>/dev/null`
   STOCKDUMP=/data/stock_boot_${SHA1}.img
   mv /data/stock_boot.img $STOCKDUMP
   $MAGISKBIN/magiskboot --compress $STOCKDUMP
diff --git a/scripts/magisk_uninstaller.sh b/scripts/magisk_uninstaller.sh
index 3d0d3ddaa..1eb3c700c 100644
--- a/scripts/magisk_uninstaller.sh
+++ b/scripts/magisk_uninstaller.sh
@@ -3,17 +3,17 @@
 #
 # Magisk Uninstaller
 # by topjohnwu
-# 
+#
 # This script can be placed in /cache/magisk_uninstaller.sh
 # The Magisk main binary will pick up the script, and uninstall itself, following a reboot
 # This script can also be used in flashable zip with the uninstaller_loader.sh
-# 
+#
 # This script will try to do restoration with the following:
 # 1-1. Find and restore the original stock boot image dump (OTA proof)
 # 1-2. If 1-1 fails, restore ramdisk from the internal backup
 #      (ramdisk fully restored, not OTA friendly)
 # 1-3. If 1-2 fails, it will remove added files in ramdisk, however modified files
-#      are remained modified, because we have no backups. By doing so, Magisk will 
+#      are remained modified, because we have no backups. By doing so, Magisk will
 #      not be started at boot, but this isn't actually 100% cleaned up
 # 2. Remove all Magisk related files
 #    (The list is LARGE, most likely due to bad decision in early versions
@@ -84,7 +84,7 @@ esac
 
 # Update our previous backup to new format if exists
 if [ -f /data/stock_boot.img ]; then
-  SHA1=`./magiskboot --sha1 /data/stock_boot.img | tail -n 1`
+  SHA1=`./magiskboot --sha1 /data/stock_boot.img 2>/dev/null`
   STOCKDUMP=/data/stock_boot_${SHA1}.img
   mv /data/stock_boot.img $STOCKDUMP
   ./magiskboot --compress $STOCKDUMP