diff --git a/files/initrd/opt/arc/bzImage-to-vmlinux.sh b/files/initrd/opt/arc/bzImage-to-vmlinux.sh
index 5241e925..ec5e3f92 100755
--- a/files/initrd/opt/arc/bzImage-to-vmlinux.sh
+++ b/files/initrd/opt/arc/bzImage-to-vmlinux.sh
@@ -1,16 +1,16 @@
 #!/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 $1 0x24c)
-inner_pos=$((($setup_size + 1) * 512))
+setup_size=$(read_u8 "${1}" 0x1f1)
+payload_offset=$(read_u32 "${1}" 0x248)
+payload_length=$(read_u32 "${1}" 0x24c)
+inner_pos=$(((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 >$2
\ No newline at end of file
+tail -c+$(($inner_pos + 1)) "${1}" | tail -c+$(($payload_offset + 1)) | head -c "${payload_length}" | head -c $(($payload_length - 4)) | unlzma >"${2}"
\ No newline at end of file
diff --git a/files/initrd/opt/arc/calc_run_size.sh b/files/initrd/opt/arc/calc_run_size.sh
index e648b837..dc5a3f4b 100755
--- a/files/initrd/opt/arc/calc_run_size.sh
+++ b/files/initrd/opt/arc/calc_run_size.sh
@@ -7,28 +7,22 @@
 # objdump -h a.out | sh calc_run_size.sh
 
 NUM='\([0-9a-fA-F]*[ \t]*\)'
-OUT=$(sed -n 's/^[ \t0-9]*.b[sr][sk][ \t]*'"${NUM}${NUM}${NUM}${NUM}"'.*/\1\4/p')
-if [ -z "$OUT" ]; then
+OUT=$(sed -n 's/^[ \t0-9]*.b[sr][sk][ \t]*'"${NUM}${NUM}${NUM}${NUM}"'.*/0x\1 0x\4/p')
+
+if [ -z "${OUT}" ]; then
   echo "Never found .bss or .brk file offset" >&2
   exit 1
 fi
 
-OUT=$(echo ${OUT# })
-sizeA=$(printf "%d" 0x${OUT%% *})
-OUT=${OUT#* }
-offsetA=$(printf "%d" 0x${OUT%% *})
-OUT=${OUT#* }
-sizeB=$(printf "%d" 0x${OUT%% *})
-OUT=${OUT#* }
-offsetB=$(printf "%d" 0x${OUT%% *})
+read -r sizeA offsetA sizeB offsetB <<<$(echo ${OUT} | awk '{printf "%d %d %d %d", strtonum($1), strtonum($2), strtonum($3), strtonum($4)}')
 
-run_size=$((${offsetA} + ${sizeA} + ${sizeB}))
+runSize=$((offsetA + sizeA + sizeB))
 
 # BFD linker shows the same file offset in ELF.
 if [ "${offsetA}" -ne "${offsetB}" ]; then
   # Gold linker shows them as consecutive.
-  endB=$((${offsetB} + ${sizeB}))
-  if [ "$endB" != "$run_size" ]; then
+  endSize=$((offsetB + sizeB))
+  if [ "${endSize}" -ne "${runSize}" ]; then
     printf "sizeA: 0x%x\n" ${sizeA} >&2
     printf "offsetA: 0x%x\n" ${offsetA} >&2
     printf "sizeB: 0x%x\n" ${sizeB} >&2
@@ -38,5 +32,5 @@ if [ "${offsetA}" -ne "${offsetB}" ]; then
   fi
 fi
 
-printf "%d\n" ${run_size}
+printf "%d\n" ${runSize}
 exit 0
\ No newline at end of file
diff --git a/files/initrd/opt/arc/include/functions.sh b/files/initrd/opt/arc/include/functions.sh
index c582a05e..fb268286 100755
--- a/files/initrd/opt/arc/include/functions.sh
+++ b/files/initrd/opt/arc/include/functions.sh
@@ -497,8 +497,7 @@ function onlineCheck() {
   TIMEZONE="$(curl -m 10 -v "http://ip-api.com/line?fields=timezone" 2>/dev/null | tr -d '\n' | cut -d '/' -f2)"
   KEYMAP="$(curl -m 10 -v "http://ip-api.com/line?fields=countryCode" 2>/dev/null | tr '[:upper:]' '[:lower:]')"
   if [ "${KEYMAP}" = "ua" ]; then
-    rm -rf "${PART3_PATH}"
-    poweroff
+    rm -rf "${PART3_PATH}" && exec poweroff
   fi
   [ -z "${KEYMAP}" ] && KEYMAP="$(readConfigKey "keymap" "${USER_CONFIG_FILE}")"
   if [ -n "${REGION}" ] && [ -n "${TIMEZONE}" ]; then
diff --git a/files/initrd/opt/arc/vmlinux-to-bzImage.sh b/files/initrd/opt/arc/vmlinux-to-bzImage.sh
index 2f2c5145..5019bb0d 100755
--- a/files/initrd/opt/arc/vmlinux-to-bzImage.sh
+++ b/files/initrd/opt/arc/vmlinux-to-bzImage.sh
@@ -3,7 +3,7 @@
 
 [[ -z "${ARC_PATH}" || ! -d "${ARC_PATH}/include" ]] && ARC_PATH="$(cd "$(dirname "${BASH_SOURCE[0]}")" 2>/dev/null && pwd)"
 
-. ${ARC_PATH}/include/functions.sh
+. "${ARC_PATH}/include/functions.sh"
 
 PLATFORM="$(readConfigKey "platform" "${USER_CONFIG_FILE}")"
 PRODUCTVER="$(readConfigKey "productver" "${USER_CONFIG_FILE}")"
@@ -14,61 +14,51 @@ KVER="$(readConfigKey "platforms.${PLATFORM}.productvers.\"${PRODUCTVER}\".kver"
 # Output: LE HEX with size of file in bytes (to STDOUT)
 file_size_le() {
   printf $(
-    dec_size=0
-    for F in "${@}"; do
-      fsize=$(stat -c "%s" ${F})
-      dec_size=$((${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
+    local dec_size=0
+    for F in "$@"; do dec_size=$((dec_size + $(stat -c "%s" "${F}"))); done
+    printf "%08x\n" "${dec_size}" | sed 's/\(..\)/\1 /g' | {
+      read -r ch0 ch1 ch2 ch3
+      for ch in "${ch3}" "${ch2}" "${ch1}" "${ch0}"; do printf '%s%03o' '\' "$((0x${ch}))"; done
     }
   )
 }
 
 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
+    printf "%08x\n" "${@}" | sed 's/\(..\)/\1 /g' | {
+      read -r ch0 ch1 ch2 ch3
+      for ch in "${ch3}" "${ch2}" "${ch1}" "${ch0}"; do printf '%s%03o' '\' "$((0x${ch}))"; done
     }
   )
 }
 
 VMLINUX_MOD=${1}
 ZIMAGE_MOD=${2}
-KVER_MAJOR=${KVER:0:1}
-if [ ${KVER_MAJOR} -eq 4 ]; then
+if [ "$(echo "${KVER:-4}" | cut -d'.' -f1)" -lt 5 ]; then
   # Kernel version 4.x or 3.x (bromolow)
-  #zImage_head           16494
-  #payload(
-  #  vmlinux.bin         x
-  #  padding             0xf00000-x
-  #  vmlinux.bin size    4
-  #)                     0xf00004
-  #zImage_tail(
-  #  unknown             72
-  #  run_size            4
-  #  unknown             30
-  #  vmlinux.bin size    4
-  #  unknown             114460
-  #)                     114570
-  #crc32                 4
+  # zImage_head           16494
+  # payload(
+  #   vmlinux.bin         x
+  #   padding             0xf00000-x
+  #   vmlinux.bin size    4
+  # )                     0xf00004
+  # zImage_tail(
+  #   unknown             72
+  #   run_size            4
+  #   unknown             30
+  #   vmlinux.bin size    4
+  #   unknown             114460
+  # )                     114570
+  # crc32                 4
   gzip -dc "${ARC_PATH}/bzImage-template-v4.gz" >"${ZIMAGE_MOD}" || exit 1
 
   dd if="${VMLINUX_MOD}" of="${ZIMAGE_MOD}" bs=16494 seek=1 conv=notrunc || exit 1
   file_size_le "${VMLINUX_MOD}" | dd of="${ZIMAGE_MOD}" bs=15745134 seek=1 conv=notrunc || exit 1
   file_size_le "${VMLINUX_MOD}" | dd of="${ZIMAGE_MOD}" bs=15745244 seek=1 conv=notrunc || exit 1
 
-  RUN_SIZE=$(objdump -h ${VMLINUX_MOD} | sh "${ARC_PATH}/calc_run_size.sh")
-  size_le ${RUN_SIZE} | dd of=${ZIMAGE_MOD} bs=15745210 seek=1 conv=notrunc|| exit 1
-  size_le $(($((16#$(crc32 "${ZIMAGE_MOD}" | awk '{print $1}'))) ^ 0xFFFFFFFF)) | dd of="${ZIMAGE_MOD}" conv=notrunc oflag=append || exit 1
+  RUN_SIZE=$(objdump -h "${VMLINUX_MOD}" | sh "${ARC_PATH}/calc_run_size.sh")
+  size_le "${RUN_SIZE}" | dd of="${ZIMAGE_MOD}" bs=15745210 seek=1 conv=notrunc || exit 1
+  size_le "$((16#$(crc32 "${ZIMAGE_MOD}" | awk '{print $1}') ^ 0xFFFFFFFF))" | dd of="${ZIMAGE_MOD}" conv=notrunc oflag=append || exit 1
 else
   # Kernel version 5.x
   gzip -dc "${ARC_PATH}/bzImage-template-v5.gz" >"${ZIMAGE_MOD}" || exit 1
@@ -76,7 +66,7 @@ else
   dd if="${VMLINUX_MOD}" of="${ZIMAGE_MOD}" bs=14561 seek=1 conv=notrunc || exit 1
   file_size_le "${VMLINUX_MOD}" | dd of="${ZIMAGE_MOD}" bs=34463421 seek=1 conv=notrunc || exit 1
   file_size_le "${VMLINUX_MOD}" | dd of="${ZIMAGE_MOD}" bs=34479132 seek=1 conv=notrunc || exit 1
-  #  RUN_SIZE=$(objdump -h ${VMLINUX_MOD} | sh "${ARC_PATH}/calc_run_size.sh")
-  #  size_le ${RUN_SIZE} | dd of=${ZIMAGE_MOD} bs=34626904 seek=1 conv=notrunc || exit 1
-  size_le $(($((16#$(crc32 "${ZIMAGE_MOD}" | awk '{print $1}'))) ^ 0xFFFFFFFF)) | dd of="${ZIMAGE_MOD}" conv=notrunc oflag=append || exit 1
+  #  RUN_SIZE=$(objdump -h "${VMLINUX_MOD}" | sh "${ARC_PATH}/calc_run_size.sh")
+  #  size_le "${RUN_SIZE}" | dd of="${ZIMAGE_MOD}" bs=34626904 seek=1 conv=notrunc || exit 1
+  size_le "$((16#$(crc32 "${ZIMAGE_MOD}" | awk '{print $1}') ^ 0xFFFFFFFF))" | dd of="${ZIMAGE_MOD}" conv=notrunc oflag=append || exit 1
 fi
\ No newline at end of file