diff --git a/files/board/arpl/overlayfs/opt/arpl/bzImage-to-vmlinux.sh b/files/board/arpl/overlayfs/opt/arpl/bzImage-to-vmlinux.sh
index b2096a6c..d6cc7a54 100755
--- a/files/board/arpl/overlayfs/opt/arpl/bzImage-to-vmlinux.sh
+++ b/files/board/arpl/overlayfs/opt/arpl/bzImage-to-vmlinux.sh
@@ -1,16 +1,16 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 read_u8() {
-  dd if=$1 bs=1 skip=$(( $2 )) count=1 2>/dev/null | od -An -tu1 | grep -Eo '[0-9]+'
+  dd if=$1 bs=1 skip=$(($2)) count=1 2>/dev/null | od -An -tu1 | grep -Eo '[0-9]+'
 }
 read_u32() {
-  dd if=$1 bs=1 skip=$(( $2 )) count=4 2>/dev/null | od -An -tu4 | grep -Eo '[0-9]+'
+  dd if=$1 bs=1 skip=$(($2)) count=4 2>/dev/null | od -An -tu4 | grep -Eo '[0-9]+'
 }
 
 set -x
 setup_size=$(read_u8 $1 0x1f1)
 payload_offset=$(read_u32 $1 0x248)
 payload_length=$(read_u32 $1 0x24c)
-inner_pos=$(( ($setup_size + 1) * 512 ))
+inner_pos=$((($setup_size + 1) * 512))
 
-tail -c+$(( $inner_pos + 1 )) $1 | tail -c+$(( $payload_offset + 1 )) | head -c $(( $payload_length )) | head -c $(($payload_length - 4)) | unlzma > $2
+tail -c+$(($inner_pos + 1)) $1 | tail -c+$(($payload_offset + 1)) | head -c $(($payload_length)) | head -c $(($payload_length - 4)) | unlzma >$2
diff --git a/files/board/arpl/overlayfs/opt/arpl/calc_run_size.sh b/files/board/arpl/overlayfs/opt/arpl/calc_run_size.sh
index a1569de6..0c1b5b85 100755
--- a/files/board/arpl/overlayfs/opt/arpl/calc_run_size.sh
+++ b/files/board/arpl/overlayfs/opt/arpl/calc_run_size.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/usr/bin/env bash
 #
 # Calculate the amount of space needed to run the kernel, including room for
 # the .bss and .brk sections.
diff --git a/files/board/arpl/overlayfs/opt/arpl/install-addons.sh b/files/board/arpl/overlayfs/opt/arpl/install-addons.sh
index bc23c8ee..68362e4f 100755
--- a/files/board/arpl/overlayfs/opt/arpl/install-addons.sh
+++ b/files/board/arpl/overlayfs/opt/arpl/install-addons.sh
@@ -5,8 +5,8 @@ set -e
 . /opt/arpl/include/functions.sh
 
 # Detect if has new local plugins to install/reinstall
-for F in `ls ${CACHE_PATH}/*.addon 2>/dev/null`; do
-  ADDON=`basename "${F}" | sed 's|.addon||'`
+for F in $(ls ${CACHE_PATH}/*.addon 2>/dev/null); do
+  ADDON=$(basename "${F}" | sed 's|.addon||')
   rm -rf "${ADDONS_PATH}/${ADDON}"
   mkdir -p "${ADDONS_PATH}/${ADDON}"
   echo "Installing ${F} to ${ADDONS_PATH}/${ADDON}"
diff --git a/files/board/arpl/overlayfs/opt/arpl/patch/config-manipulators.sh b/files/board/arpl/overlayfs/opt/arpl/patch/config-manipulators.sh
index 05d34a7b..c23bafbd 100644
--- a/files/board/arpl/overlayfs/opt/arpl/patch/config-manipulators.sh
+++ b/files/board/arpl/overlayfs/opt/arpl/patch/config-manipulators.sh
@@ -5,15 +5,13 @@
 #          be able to execute in the initramfs/preboot environment (so no bashism etc)
 # All comments will be stripped, functions here should NOT start with brp_ as they're not part of the builder
 
-
 if [ -z ${SED_PATH+x} ]; then
   echo "Your SED_PATH variable is not set/is empty!"
   exit 1
 fi
 
 ##$1 from, $2 to, $3 file to path
-_replace_in_file()
-{
+_replace_in_file() {
   if grep -q "$1" "$3"; then
     $SED_PATH -i "$3" -e "s#$1#$2#"
   fi
@@ -22,12 +20,11 @@ _replace_in_file()
 # Replace/remove/add values in .conf K=V file
 #
 # Args: $1 name, $2 new_val, $3 path
-_set_conf_kv()
-{
+_set_conf_kv() {
   # Delete
   if [ -z "$2" ]; then
     $SED_PATH -i "$3" -e "s/^$1=.*$//"
-    return 0;
+    return 0
   fi
 
   # Replace
@@ -37,5 +34,5 @@ _set_conf_kv()
   fi
 
   # Add if doesn't exist
-  echo "$1=\"$2\"" >> $3
+  echo "$1=\"$2\"" >>$3
 }
diff --git a/files/board/arpl/overlayfs/opt/arpl/patch/iosched-trampoline.sh b/files/board/arpl/overlayfs/opt/arpl/patch/iosched-trampoline.sh
index 03136971..2d3e38c9 100755
--- a/files/board/arpl/overlayfs/opt/arpl/patch/iosched-trampoline.sh
+++ b/files/board/arpl/overlayfs/opt/arpl/patch/iosched-trampoline.sh
@@ -4,8 +4,7 @@
 # possible (which turns out to be via init/main.c => load_default_modules => load_default_elevator_module
 # When the kernel is booted with "elevator=elevator" it will attempt to load a module "elevator-iosched"... and the rest
 # should be obvious from the code below. DO NOT print anything here (kernel doesn't attach STDOUT)
-for arg in "$@"
-do
+for arg in "$@"; do
   if [ "$arg" = "elevator-iosched" ]; then
     insmod /usr/lib/modules/rp.ko
     rm /usr/lib/modules/rp.ko
diff --git a/files/board/arpl/overlayfs/opt/arpl/vmlinux-to-bzImage.sh b/files/board/arpl/overlayfs/opt/arpl/vmlinux-to-bzImage.sh
index 7c1d41af..f556ce80 100755
--- a/files/board/arpl/overlayfs/opt/arpl/vmlinux-to-bzImage.sh
+++ b/files/board/arpl/overlayfs/opt/arpl/vmlinux-to-bzImage.sh
@@ -1,44 +1,44 @@
-#!/bin/sh
+#!/usr/bin/env bash
 # Based on code and ideas from @jumkey
 
 . /opt/arpl/include/functions.sh
 
-MODEL="`readConfigKey "model" "${USER_CONFIG_FILE}"`"
-BUILD="`readConfigKey "build" "${USER_CONFIG_FILE}"`"
-KVER="`readModelKey "${MODEL}" "builds.${BUILD}.kver"`"
+MODEL="$(readConfigKey "model" "${USER_CONFIG_FILE}")"
+BUILD="$(readConfigKey "build" "${USER_CONFIG_FILE}")"
+KVER="$(readModelKey "${MODEL}" "builds.${BUILD}.kver")"
 
 # Adapted from: scripts/Makefile.lib
 # Usage: size_append FILE [FILE2] [FILEn]...
 # Output: LE HEX with size of file in bytes (to STDOUT)
-file_size_le () {
+file_size_le() {
   printf $(
-    dec_size=0;
+    dec_size=0
     for F in "${@}"; do
-      fsize=$(stat -c "%s" ${F});
-      dec_size=$(expr ${dec_size} + ${fsize});
-    done;
+      fsize=$(stat -c "%s" ${F})
+      dec_size=$(expr ${dec_size} + ${fsize})
+    done
     printf "%08x\n" ${dec_size} |
       sed 's/\(..\)/\1 /g' | {
-        read ch0 ch1 ch2 ch3;
-        for ch in ${ch3} ${ch2} ${ch1} ${ch0}; do
-          printf '%s%03o' '\' $((0x${ch}));
-        done;
-      }
+      read ch0 ch1 ch2 ch3
+      for ch in ${ch3} ${ch2} ${ch1} ${ch0}; do
+        printf '%s%03o' '\' $((0x${ch}))
+      done
+    }
   )
 }
 
-size_le () {
+size_le() {
   printf $(
     printf "%08x\n" "${@}" |
       sed 's/\(..\)/\1 /g' | {
-        read ch0 ch1 ch2 ch3;
-        for ch in ${ch3} ${ch2} ${ch1} ${ch0}; do
-          printf '%s%03o' '\' $((0x${ch}));
-        done;
-      }
+      read ch0 ch1 ch2 ch3
+      for ch in ${ch3} ${ch2} ${ch1} ${ch0}; do
+        printf '%s%03o' '\' $((0x${ch}))
+      done
+    }
   )
 }
-SCRIPT_DIR=`dirname $0`
+SCRIPT_DIR=$(dirname $0)
 VMLINUX_MOD=${1}
 ZIMAGE_MOD=${2}
 KVER_MAJOR=${KVER:0:1}
@@ -58,23 +58,23 @@ if [ $KVER_MAJOR -eq 4 ] || [ $KVER_MAJOR -eq 3 ]; then
   #  unknown             114460
   #)                     114570
   #crc32                 4
-  gzip -dc "${SCRIPT_DIR}/bzImage-template-v4.gz" > "${ZIMAGE_MOD}"
+  gzip -dc "${SCRIPT_DIR}/bzImage-template-v4.gz" >"${ZIMAGE_MOD}"
 
   dd if="${VMLINUX_MOD}" of="${ZIMAGE_MOD}" bs=16494 seek=1 conv=notrunc >"${LOG_FILE}" 2>&1 || dieLog
   file_size_le "${VMLINUX_MOD}" | dd of="${ZIMAGE_MOD}" bs=15745134 seek=1 conv=notrunc >"${LOG_FILE}" 2>&1 || dieLog
   file_size_le "${VMLINUX_MOD}" | dd of="${ZIMAGE_MOD}" bs=15745244 seek=1 conv=notrunc >"${LOG_FILE}" 2>&1 || dieLog
 
-  RUN_SIZE=`objdump -h ${VMLINUX_MOD} | sh "${SCRIPT_DIR}/calc_run_size.sh"`
+  RUN_SIZE=$(objdump -h ${VMLINUX_MOD} | sh "${SCRIPT_DIR}/calc_run_size.sh")
   size_le ${RUN_SIZE} | dd of=${ZIMAGE_MOD} bs=15745210 seek=1 conv=notrunc >"${LOG_FILE}" 2>&1 || dieLog
-  size_le $(($((16#`crc32 "${ZIMAGE_MOD}" | awk '{print$1}'`)) ^ 0xFFFFFFFF)) | dd of="${ZIMAGE_MOD}" conv=notrunc oflag=append >"${LOG_FILE}" 2>&1 || dieLog
+  size_le $(($((16#$(crc32 "${ZIMAGE_MOD}" | awk '{print$1}'))) ^ 0xFFFFFFFF)) | dd of="${ZIMAGE_MOD}" conv=notrunc oflag=append >"${LOG_FILE}" 2>&1 || dieLog
 else
   # Kernel version 5.x
-  gzip -dc "${SCRIPT_DIR}/bzImage-template-v5.gz" > "${ZIMAGE_MOD}"
+  gzip -dc "${SCRIPT_DIR}/bzImage-template-v5.gz" >"${ZIMAGE_MOD}"
 
   dd if="${VMLINUX_MOD}" of="${ZIMAGE_MOD}" bs=14561 seek=1 conv=notrunc >"${LOG_FILE}" 2>&1 || dieLog
   file_size_le "${VMLINUX_MOD}" | dd of="${ZIMAGE_MOD}" bs=34463421 seek=1 conv=notrunc >"${LOG_FILE}" 2>&1 || dieLog
   file_size_le "${VMLINUX_MOD}" | dd of="${ZIMAGE_MOD}" bs=34479132 seek=1 conv=notrunc >"${LOG_FILE}" 2>&1 || dieLog
-#  RUN_SIZE=`objdump -h ${VMLINUX_MOD} | sh "${SCRIPT_DIR}/calc_run_size.sh"`
-#  size_le ${RUN_SIZE} | dd of=${ZIMAGE_MOD} bs=34626904 seek=1 conv=notrunc >"${LOG_FILE}" 2>&1 || dieLog
-  size_le $(($((16#`crc32 "${ZIMAGE_MOD}" | awk '{print$1}'`)) ^ 0xFFFFFFFF)) | dd of="${ZIMAGE_MOD}" conv=notrunc oflag=append >"${LOG_FILE}" 2>&1 || dieLog
+  #  RUN_SIZE=`objdump -h ${VMLINUX_MOD} | sh "${SCRIPT_DIR}/calc_run_size.sh"`
+  #  size_le ${RUN_SIZE} | dd of=${ZIMAGE_MOD} bs=34626904 seek=1 conv=notrunc >"${LOG_FILE}" 2>&1 || dieLog
+  size_le $(($((16#$(crc32 "${ZIMAGE_MOD}" | awk '{print$1}'))) ^ 0xFFFFFFFF)) | dd of="${ZIMAGE_MOD}" conv=notrunc oflag=append >"${LOG_FILE}" 2>&1 || dieLog
 fi