Update 00-header

Linux_reinstall/updatemotd/00-header

@@ -1,9 +1,11 @@
-#!/bin/bash
+#!/bin/sh
 #
-#    10-sysinfo - generate the system information
+#    00-header - create the header of the MOTD
 #    Copyright (c) 2013 Nick Charlton
+#    Copyright (c) 2009-2010 Canonical Ltd.
 #
 #    Authors: Nick Charlton <hello@nickcharlton.net>
+#             Dustin Kirkland <kirkland@canonical.com>
 #    Modified by Oitibs: https://oitibs.com/?s=Debian+Dynamic+MOTD
 #    Modified by Leitbogioro: https://github.com/leitbogioro/
 #                             https://www.zhihu.com/column/originaltechnic
@@ -21,72 +23,28 @@
 #    You should have received a copy of the GNU General Public License along
 #    with this program; if not, write to the Free Software Foundation, Inc.,
 #    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- 
-date=`date`
-load=`cat /proc/loadavg | awk '{print $1}'`
-root_usage=`df -h / | awk '/\// {print $(NF-1)}'`
-memory_usage=`free -m | awk '/Mem:/ { total=$2; used=$3 } END { printf("%3.1f%%", used/total*100)}'`
 
-[[ `free -m | awk '/Swap/ {print $2}'` == "0" ]] && swap_usage="0.0%" || swap_usage=`free -m | awk '/Swap/ { printf("%3.1f%%", $3/$2*100) }'`
-users=`users | wc -w`
-time=`uptime | grep -ohe 'up .*' | sed 's/,/\ hours/g' | awk '{ printf $2" "$3 }'`
-processes=`ps aux | wc -l`
-localip=`hostname -I | awk '{print $1}'`
+#[ -r /etc/lsb-release ] ; /etc/lsb-release
 
-IPv4=`timeout 0.2s dig -4 TXT +short o-o.myaddr.l.google.com @ns1.google.com | sed 's/\"//g'`
-[[ "$IPv4" == "" ]] && IPv4=`timeout 0.2s dig -4 TXT CH +short whoami.cloudflare @1.0.0.1 | sed 's/\"//g'`
-IPv6=`timeout 0.2s dig -6 TXT +short o-o.myaddr.l.google.com @ns1.google.com | sed 's/\"//g'`
-[[ "$IPv6" == "" ]] && IPv6=`timeout 0.2s dig -6 TXT CH +short whoami.cloudflare @2606:4700:4700::1001 | sed 's/\"//g'`
-# IP_Check=$(echo $IPv4 | awk -F. '$1<255&&$2<255&&$3<255&&$4<255{print "isIPv4"}')
-IP_Check="$IPv4"
-if expr "$IP_Check" : '[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*$' >/dev/null; then
-  for i in 1 2 3 4; do
-    if [ $(echo "$IP_Check" | cut -d. -f$i) -gt 255 ]; then
-      echo "fail ($IP_Check)"
-      exit 1
-    fi
-  done
-  IP_Check="isIPv4"
+if [ -z "$DISTRIB_DESCRIPTION" ] ; [ -x /usr/bin/lsb_release ]; then
+  # Fall back to using the very slow lsb_release utility
+  DISTRIB_DESCRIPTION=$(lsb_release -s -d)
 fi
 
-[[ ${IPv6: -1} == ":" ]] && IPv6=$(echo "$IPv6" | sed 's/.$/0/')
-[[ ${IPv6:0:1} == ":" ]] && IPv6=$(echo "$IPv6" | sed 's/^./0/')
-IP6_Check="$IPv6"":"
-IP6_Hex_Num=`echo "$IP6_Check" | tr -cd ":" | wc -c`
-IP6_Hex_Abbr="0"
-if [[ `echo "$IPv6" | grep -i '[[:xdigit:]]' | grep ':'` ]] && [[ "$IP6_Hex_Num" -le "8" ]]; then
-  for ((i=1; i<="$IP6_Hex_Num"; i++)){
-    IP6_Hex=$(echo "$IP6_Check" | cut -d: -f$i)
-    [[ "$IP6_Hex" == "" ]] && IP6_Hex_Abbr=`expr $IP6_Hex_Abbr + 1`
-    [[ `echo "$IP6_Hex" | wc -c` -le "4" ]] && {
-      if [[ `echo "$IP6_Hex" | grep -iE '[^0-9a-f]'` ]] || [[ "$IP6_Hex_Abbr" -gt "1" ]]; then
-        echo "fail ($IP6_Check)"
-        exit 1
-      fi
-    }
-  }
-  IP6_Check="isIPv6"
-fi
+figlet `cat /etc/issue | cut -d " " -f1`
+printf "\n"
 
-[[ "${IP6_Check}" != "isIPv6" ]] && IPv6="N/A"
-
-[[ "${IP_Check}" != "isIPv4" ]] && IPv4="N/A"
-
-if [[ "${localip}" == "${IPv4}" ]] || [[ "${localip}" == "${IPv6}" ]] || [[ -z "${localip}" ]]; then
-  # localip=`ip -o a show | grep -w "lo" | grep -w "inet" | cut -d ' ' -f7 | awk '{split($1, a, "/"); print $2 "" a[1]}'`
-  localip=`cat /etc/hosts | grep "localhost" | sed -n 1p | awk '{print $1}'`
-fi
-
-echo " System information as of $date"
-echo
-printf "%-30s%-15s\n" " System Load:" "$load"
-printf "%-30s%-15s\n" " Private IP Address:" "$localip"
-printf "%-30s%-15s\n" " Public IPv4 Address:" "$IPv4"
-printf "%-30s%-15s\n" " Public IPv6 Address:" "$IPv6"
-printf "%-30s%-15s\n" " Memory Usage:" "$memory_usage"
-printf "%-30s%-15s\n" " Usage On /:" "$root_usage"
-printf "%-30s%-15s\n" " Swap Usage:" "$swap_usage"
-printf "%-30s%-15s\n" " Local Users:" "$users"
-printf "%-30s%-15s\n" " Processes:" "$processes"
-printf "%-30s%-15s\n" " System Uptime:" "$time"
-echo
+printf "Welcome to %s (%s).\n" "$DISTRIB_DESCRIPTION" "$(uname -r)"
+printf "\n"
+printf "The programs included with the Debian GNU/Linux system are free software;"
+printf "\n"
+printf "the exact distribution terms for each program are described in the"
+printf "\n"
+printf "individual files in /usr/share/doc/*/copyright."
+printf "\n"
+printf "\n"
+printf "Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent"
+printf "\n"
+printf "permitted by applicable law."
+printf "\n"
+printf "\n"