diff --git a/.gitignore b/.gitignore
index 7168344f04..ac9936c872 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,6 +15,9 @@ mkpkg-temp
 # private working directory
 /.work/
 
+# dedicated filesystem
+/lost+found/
+
 # symlinks...
 /sources
 /.work
diff --git a/config/functions b/config/functions
index c9691c9c95..b6cf71aeaa 100644
--- a/config/functions
+++ b/config/functions
@@ -671,17 +671,6 @@ install_addon_files() {
   create_addon_xml "$1"
 }
 
-tolower() {
-  echo "$@" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
-}
-
-require_eglibc() {
-  if [ "$TARGET_LIBC" != eglibc ]; then
-    echo "$1 requires eglibc, aborting."
-    exit 1
-  fi
-}
-
 add_user() {
   # Usage: add_user "username" "password" "userid" "groupid" "description" "home" "shell"
   mkdir -p ${INSTALL}/etc
diff --git a/config/options b/config/options
index 7013860093..46ea9826a3 100644
--- a/config/options
+++ b/config/options
@@ -70,7 +70,7 @@ LINUX_DEPENDS="$PROJECT_DIR/$PROJECT/linux $PROJECT_DIR/$PROJECT/patches/linux $
 
 # Need to point to your actual cc
 # If you have ccache installed, take care that LOCAL_CC don't point to it
-  [ -z "${LOCAL_CC}" ] && export LOCAL_CC="$(which gcc)"
+  [ -z "${LOCAL_CC}" ] && export LOCAL_CC="$(command -v gcc)"
 
 if [ -z "$LOCAL_CC" ] ; then
   echo "***** Please install gcc *****"
@@ -79,15 +79,15 @@ fi
 
 # Need to point to your actual g++
 # If you have ccache installed, take care that LOCAL_CXX don't point to it
-  [ -z "${LOCAL_CXX}" ] && export LOCAL_CXX="$(which g++)"
+  [ -z "${LOCAL_CXX}" ] && export LOCAL_CXX="$(command -v g++)"
 
 # verbose compilation mode (yes/no)
   VERBOSE="${VERBOSE:-yes}"
 
 # Concurrency make level (-j option)
-#  Try value 1 (default) to 4 on single CPU computer, or more on
-#  multi-processor computer (like hyperthreading SMP CPU)
-  [ -z "${CONCURRENCY_MAKE_LEVEL}" ] && export CONCURRENCY_MAKE_LEVEL=$(grep -c '^processor[[:cntrl:]]*:' /proc/cpuinfo)
+#  Try values between 1 and number of processor cores present.
+#  default: use all cores
+  [ -z "${CONCURRENCY_MAKE_LEVEL}" ] && export CONCURRENCY_MAKE_LEVEL=$(nproc)
 
 # cache size for ccache
 # Set the maximum size of the files stored in the cache. You can specify a
diff --git a/projects/Amlogic/options b/projects/Amlogic/options
index 8c125aaf7e..a7762ea86b 100644
--- a/projects/Amlogic/options
+++ b/projects/Amlogic/options
@@ -96,7 +96,7 @@
   # Displayserver to use (x11 / no)
     DISPLAYSERVER="no"
 
-  # Windowmanager to use (ratpoison / fluxbox / none)
+  # Windowmanager to use (fluxbox / none)
     WINDOWMANAGER="none"
 
   # Xorg Graphic drivers to use (all / i915,i965,r200,r300,r600,nvidia,nouveau)
diff --git a/projects/RPi/options b/projects/RPi/options
index d77c6a0258..d77c883390 100644
--- a/projects/RPi/options
+++ b/projects/RPi/options
@@ -8,7 +8,6 @@
       arm)
         # Valid TARGET_CPU for Raspberry Pi based devices are:
         # arm1176jzf-s cortex-a7 cortex-a53
-
         if [ "$DEVICE" = "RPi" -o "$DEVICE" = "Slice" ]; then
           TARGET_CPU="arm1176jzf-s"
         elif [ "$DEVICE" = "RPi2" -o "$DEVICE" = "Slice3" ]; then
@@ -24,18 +23,16 @@
         # This specifies what floating point hardware (or hardware emulation) is
         # available on the target. Permissible names are:
         # vfp neon-vfpv4 neon-fp-armv8
-
         if [ "$DEVICE" = "RPi" -o "$DEVICE" = "Slice" ]; then
           TARGET_FPU="vfp"
         elif [ "$DEVICE" = "RPi2" -o "$DEVICE" = "Slice3" ]; then
           TARGET_FPU="neon-vfpv4"
         fi
         TARGET_FEATURES="32bit"
-
         ;;
     esac
 
-  # Bootloader to use (syslinux / u-boot / bcm2835-bootloader)
+  # Bootloader to use (bcm2835-bootloader)
     BOOTLOADER="bcm2835-bootloader"
 
   # u-boot version to use (default)
@@ -91,7 +88,6 @@ fi
   # SquashFS compression method (gzip / lzo / xz / zstd)
     SQUASHFS_COMPRESSION="lzo"
 
-
 ################################################################################
 # setup project defaults
 ################################################################################
@@ -102,7 +98,7 @@ fi
   # OpenGL(X) implementation to use (no / mesa)
     OPENGL="no"
 
-  # OpenGL-ES implementation to use (no / bcm2835-driver / gpu-viv-bin-mx6q)
+  # OpenGL-ES implementation to use (no / bcm2835-driver / mesa)
     OPENGLES="bcm2835-driver"
 
   # include uvesafb support (yes / no)
@@ -111,18 +107,18 @@ fi
   # Displayserver to use (x11 / no)
     DISPLAYSERVER="no"
 
-  # Windowmanager to use (ratpoison / fluxbox / none)
+  # Windowmanager to use (fluxbox / none)
     WINDOWMANAGER="none"
 
-  # Xorg Graphic drivers to use (all / i915,i965,r200,r300,r600,nvidia)
+  # Xorg Graphic drivers to use (all / vc4 / none)
   # Space separated list is supported,
-  # e.g. GRAPHIC_DRIVERS="i915 i965 r300 r600 radeonsi nvidia"
+  # e.g. GRAPHIC_DRIVERS="vc4"
     GRAPHIC_DRIVERS=""
 
   # Use a vendor specific KODI repo
     KODI_VENDOR="raspberrypi"
 
-  # KODI Player implementation to use (default / bcm2835-driver / libfslvpuwrap)
+  # KODI Player implementation to use (default / bcm2835-driver / mesa)
     KODIPLAYER_DRIVER="bcm2835-driver"
 
   # Modules to install in initramfs for early boot
diff --git a/projects/Rockchip/options b/projects/Rockchip/options
index 21628264ca..f98719b2a8 100644
--- a/projects/Rockchip/options
+++ b/projects/Rockchip/options
@@ -41,7 +41,7 @@
   # Displayserver to use (weston / no)
     DISPLAYSERVER="no"
 
-  # Windowmanager to use (ratpoison / fluxbox / none)
+  # Windowmanager to use (fluxbox / none)
     WINDOWMANAGER="none"
 
   # Xorg Graphic drivers to use (all / i915,i965,r200,r300,r600,nvidia)
diff --git a/projects/WeTek_Core/options b/projects/WeTek_Core/options
index 37c479c903..c7e43c455b 100644
--- a/projects/WeTek_Core/options
+++ b/projects/WeTek_Core/options
@@ -103,7 +103,7 @@
   # Displayserver to use (x11 / no)
     DISPLAYSERVER="no"
 
-  # Windowmanager to use (ratpoison / fluxbox / none)
+  # Windowmanager to use (fluxbox / none)
     WINDOWMANAGER="none"
 
   # Xorg Graphic drivers to use (all / i915,i965,r200,r300,r600,nvidia,nouveau)
diff --git a/projects/WeTek_Play/options b/projects/WeTek_Play/options
index 58cfeedf4f..680f41382f 100644
--- a/projects/WeTek_Play/options
+++ b/projects/WeTek_Play/options
@@ -100,7 +100,7 @@
   # Displayserver to use (x11 / no)
     DISPLAYSERVER="no"
 
-  # Windowmanager to use (ratpoison / fluxbox / none)
+  # Windowmanager to use (fluxbox / none)
     WINDOWMANAGER="none"
 
   # Xorg Graphic drivers to use (all / i915,i965,r200,r300,r600,nvidia)
diff --git a/scripts/checkdeps b/scripts/checkdeps
index 82268c3b8d..fcff945cca 100755
--- a/scripts/checkdeps
+++ b/scripts/checkdeps
@@ -41,7 +41,7 @@ get_deps() {
 get_yes_no()
 {
   local ans
-  read -p "Would you like to install the needed tools ? (y/n) " ans
+  read -p "Would you like to install the needed tools? (y/n) " ans
   [ "${ans,,}" = "y" ] && return 0
   [ "${ans,,}" = "yes" ] && return 0
   return 1
@@ -132,34 +132,38 @@ if [ "${#need[@]}" -gt 0 ]; then
   done
   echo "**** You seem to use a $DISTRO system ****"
 
-  case "$DISTRO" in
-    ubuntu|debian|linuxmint|\"elementary\")
-      get_yes_no && sudo apt-get install "${need_pkg[@]}"
-      ;;
-    fedora|centos|rhel)
-      if [ $(which dnf) ]; then YUM=dnf; else YUM=yum; fi
-      get_yes_no && sudo $YUM install "${need_pkg[@]}"
-      ;;
-    gentoo)
-      get_yes_no && sudo emerge --ask --deep "${need_pkg[@]}"
-      ;;
-    sabayon)
-      get_yes_no && sudo equo install --ask "${need_pkg[@]}"
-      ;;
-    mageia)
-      get_yes_no && sudo urpmi "${need_pkg[@]}"
-      ;;
-    arch)
-      get_yes_no && sudo pacman -Sy "${need_pkg[@]}"
-      ;;
-    opensuse)
-      get_yes_no && sudo zypper install -y --no-recommends "${need_pkg[@]}"
-      ;;
-    *)
-      echo "**** unsupported distro $DISTRO ****"
-      exit 1
-      ;;
-  esac
+  if command -v sudo >/dev/null; then
+    case "$DISTRO" in
+      ubuntu|debian|linuxmint|\"elementary\")
+        get_yes_no && sudo apt-get install "${need_pkg[@]}"
+        ;;
+      fedora|centos|rhel)
+        command -v dnf >/dev/null && YUM=dnf || YUM=yum
+        get_yes_no && sudo $YUM install "${need_pkg[@]}"
+        ;;
+      gentoo)
+        get_yes_no && sudo emerge --ask --deep "${need_pkg[@]}"
+        ;;
+      sabayon)
+        get_yes_no && sudo equo install --ask "${need_pkg[@]}"
+        ;;
+      mageia)
+        get_yes_no && sudo urpmi "${need_pkg[@]}"
+        ;;
+      arch)
+        get_yes_no && sudo pacman -Sy "${need_pkg[@]}"
+        ;;
+      opensuse)
+        get_yes_no && sudo zypper install -y --no-recommends "${need_pkg[@]}"
+        ;;
+      *)
+        echo "**** unsupported distro $DISTRO ****"
+        exit 1
+        ;;
+    esac
+  else
+    echo "The command 'sudo' was not found. Please install necessary packages manually."
+  fi
 fi
 
 get_deps
diff --git a/tools/mkpkg/mkpkg_lockdev b/tools/mkpkg/mkpkg_lockdev
deleted file mode 100755
index 0123a01b25..0000000000
--- a/tools/mkpkg/mkpkg_lockdev
+++ /dev/null
@@ -1,36 +0,0 @@
-#!/bin/sh
-
-# SPDX-License-Identifier: GPL-2.0-or-later
-# Copyright (C) 2009-2016 Stephan Raue (stephan@openelec.tv)
-# Copyright (C) 2018-present Team LibreELEC (https://libreelec.tv)
-
-echo "getting sources..."
-  if [ ! -d lockdev.git ]; then
-    git clone git://anonscm.debian.org/lockdev/lockdev.git -b master lockdev.git
-  fi
-
-  cd lockdev.git
-    git pull
-    GIT_REV=`git log -n1 --format=%H`
-  cd ..
-
-echo "copying sources..."
-  rm -rf lockdev-$GIT_REV
-  cp -R lockdev.git lockdev-$GIT_REV
-
-echo "creating VERSION and other needed files"
-  (
-    cd lockdev-$GIT_REV
-    LC_ALL=C ./scripts/git-version > VERSION
-    touch ChangeLog
-  ) 
-
-echo "cleaning sources..."
-  rm -rf lockdev-$GIT_REV/.git
-
-
-echo "packing sources..."
-  tar cvJf lockdev-$GIT_REV.tar.xz lockdev-$GIT_REV
-
-echo "remove temporary sourcedir..."
-