Add screen clearing routine and improve commands display

packages/bsp/common/etc/update-motd.d/00-clear

@@ -0,0 +1,27 @@
+#!/bin/bash
+#
+# Copyright (c) Authors: https://www.armbian.com/authors
+#
+# This file is licensed under the terms of the GNU General Public
+# License version 2. This program is licensed "as is" without any
+# warranty of any kind, whether express or implied.
+
+# DO NOT EDIT THIS FILE but add config options to /etc/default/armbian-motd
+# any changes will be lost on board support package update
+
+THIS_SCRIPT="clear"
+MOTD_DISABLE=""
+
+[[ -f /etc/default/armbian-motd ]] && . /etc/default/armbian-motd
+
+for f in $MOTD_DISABLE; do
+	[[ $f == $THIS_SCRIPT ]] && exit 0
+done
+
+# Clear screen
+if [ -f /bin/bash ]; then
+export TERM="$(/bin/bash -c 'echo $TERM')"
+fi
+clear
+
+exit 0

packages/bsp/common/etc/update-motd.d/30-armbian-sysinfo

@@ -215,4 +215,4 @@ if [[ $(command -v zpool) ]]; then
 		line=$((line+1))
 	fi
 fi
-if [[ $line -ne 0 ]]; then echo ""; fi
+echo ""

packages/bsp/common/etc/update-motd.d/41-commands

@@ -19,12 +19,13 @@ for f in $MOTD_DISABLE; do
 done
 
 list=(
-    "System config                ","sudo ","armbian-config"
-    "System monitor               ","","htop"
+    "System config","sudo ","armbian-config"
+    "System monitor","","htop"
 )
 
 # verify if command exits on the system
 cmd_count=0
+name_len=0
 output=()
 for l in "${list[@]}"
 do
@@ -33,6 +34,10 @@ do
 	command=$(echo $l | cut -d"," -f3)
 	if command -v $command &> /dev/null
 	then
+		# seek for maximum description lenght
+		if [ ${#name} -ge $name_len ]; then
+			name_len=${#name}
+		fi
 		cmd_count=$(( cmd_count +1 ))
 		output+=("${name},${sudo},${command}")
 	fi
@@ -40,15 +45,14 @@ done
 
 # show list for existing command only
 if [[ "${cmd_count}" -gt 0 ]]; then
-
 	printf "\e[0;90m Commands: \x1B[0m\n" #; printf '%.s─' $(seq 1 39); echo -e "\x1B[0m"
 	echo ""
 	for l in "${output[@]}"
 	do
-        name=$(echo $l | cut -d"," -f1)
-        sudo=$(echo $l | cut -d"," -f2)
-        command=$(echo $l | cut -d"," -f3)
-	printf " \e[1;33m%-26s\e[0m %-0s: $sudo$command\n" "$name"
+		name=$(echo $l | cut -d"," -f1)
+		sudo=$(echo $l | cut -d"," -f2)
+		command=$(echo $l | cut -d"," -f3)
+		printf " \e[1;33m%-${name_len}s\e[0m %-0s: $sudo$command\n" "$name"
 	done
 	echo -e "\033[0m"
 fi