first commit

README.md

@@ -0,0 +1,52 @@
+# dynmotd
+Dynamic Motd (Message of the Day) an old script to print out some system-specific information.
+
+
+![Example](/data/dynmotd.png)
+
+
+Requirements
+------------
+
+awk, egrep, sed, whoami, hostname, touch, source, rm, who, sort, uniq, tty, ps, ulimit, groups, cat, cut, wc, uptime, bc, uname, host, id, bash, df, 
+
+Installation
+------------
+
+download
+
+~~~
+git clone https://github.com/rtulke/dynmotd.git
+cd dynmotd
+~~~
+
+rename files
+
+~~~~
+mv addlog.sh /usr/local/bin/addlog
+mv rmlog.sh /usr/local/bin/rmlog
+mv listlog.sh /usr/local/bin/listlog
+mv dynmotd.sh /usr/local/bin/dynmotd
+~~~~
+
+change permissions
+
+~~~~
+chmod 700 /usr/local/bin/addlog
+chmod 700 /usr/local/bin/rmlog
+chmod 700 /usr/local/bin/listlog
+chmod 777 /usr/local/bin/dynmotd
+~~~~
+
+**enabled dynmotd to display all informations after user login (only root)**
+
+~~~
+echo "/usr/local/bin/dynmotd" > /etc/profile.d/motd.sh
+~~~
+
+Commands 
+--------
+* addlog, add a new log entry into the .maintenance file
+* rmlog, delete a specific line in .maintenance 
+* listlog, list all .maintenance log entries
+* dynmotd, shows system informations

addlog.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+MAINLOG="/root/.maintenance"
+
+## don't start as root
+if [ $(whoami) != root ]; then
+    echo "run as root only"
+    exit 0
+fi
+
+if [ ! -f "$MAINLOG" ]; then
+    echo "Maintenance Logfile not found: $MAINLOG"
+    exit 0
+fi
+
+E_NOARGS=65
+if [ -z "$1" ]
+then
+  echo "Usage: "
+  echo "  ./$(basename $0) \"added new guest account\" "
+  echo
+  exit $E_NOARGS
+fi
+mydate=$(date +"%b %d %H:%M:%S")
+echo $mydate $1 >> $MAINLOG
+exit 0

dynmodt.sh

@@ -0,0 +1,213 @@
+#!/bin/bash
+
+# Dynamic Motd
+# Robert Tulke, rt@debian.sh
+
+## only root can start
+if [ $(whoami) != root ]; then
+    #cat /etc/motd
+    exit 0
+fi
+
+## version
+version="dynmotd v0.8"
+fqdn=$(hostname --fqdn)
+
+## some colors for a scheme
+C_RED="\033[0;31m"
+C_BLUE="\033[0;34m"
+C_BLACK="\033[0;30m"
+C_CYAN="\033[0;36m"
+C_PINK="\033[0;35m"
+C_GREY="\033[0;37m"
+C_LGREEN="\033[1;32m"
+
+
+## color schemes
+# DOT, day of the tentacle scheme
+F1=${C_GREY}
+F2=${C_PINK}
+F3=${C_LGREEN}
+F4=${C_RED}
+
+
+## create .maintenance file if not exist
+if [ ! -f /root/.maintenance ]; then
+    touch /root/.maintenance
+fi
+
+## investigate linux distribution
+## create .environment file if not exist
+function createenv {
+
+    if [ ! -f /root/.environment ]; then
+        echo "First login... We want to assign a function name for $fqdn,"
+        echo "like: Backup Server|File Server|Gateway|Proxy|..."
+        echo
+        echo -n "System Function: "
+        read SYSFUNCTION
+        echo -n "System Environment, like PRD|TST|ITG: "
+        read SYSENV
+        echo -n "Service Level Agreement, like SLA1|SLA2|SLA3: "
+        read SYSSLA
+
+        touch /root/.environment
+        echo "SYSENV=\"$SYSENV\"" >> /root/.environment
+        echo "SYSFUNCTION=\"$SYSFUNCTION\"" >> /root/.environment
+        echo "SYSSLA=\"$SYSSLA\"" >> /root/.environment
+    fi
+}
+
+## environment check
+if [ ! -f /root/.environment ]; then
+    createenv ; # if not exist then create
+fi
+
+## include sys environment variables
+source /root/.environment
+
+## test sys .environment variables, if any of them are empty or currupt
+if [ -z "${SYSFUNCTION}" ] || [ -z "${SYSENV}" ] || [ -z "${SYSSLA}" ]; then
+    rm /root/.environment
+    createenv ; # variables are exist but empty, create new
+fi
+
+## get a list of all logged in users
+LOGGEDIN=$( echo $( for i in $( who |awk -F '[()]' '{ print $2 '} |sort -n ) ; do echo $i; done |uniq -c |awk {'print "(" $1 ") "$2","'} ) |sed 's/,$//' |sed '1,$s/\([^,]*,[^,]*,[^,]*,\)/\1\n\\033[1;32m\t          /g' )
+
+## get my terminal
+MYTTY=$(tty |sed 's/\/dev\///')
+
+## get my hostname
+MYHOST=$(who |egrep $MYTTY |awk -F '[()]' {'print $2'})
+
+## extract my apn from fqdn
+APN=$(echo $MYHOST |awk -F '()' '{print $1}')
+
+## get current procs
+PROCCOUNT=$(ps -Afl |egrep -v 'ps|wc' |wc -l)
+
+## get maxium usable procs
+PROCMAX=$(ulimit -u)
+
+## get my own user groups
+GROUPZ=$(groups)
+
+## how many ssh super user (root) are there
+SUPERUSERCOUNT=$(cat /root/.ssh/authorized_keys |egrep '^ssh-' |wc -l)
+
+## who is super user (ignore root@)
+SUPERUSER=$(cat /root/.ssh/authorized_keys |egrep '^ssh-' |egrep -v 'root\@|^$|^.$' |awk '{if ($0) print}' |awk {'print $3" "$4'} |sed 's/@.*$//g'| awk -F [.] {'print $1'} |awk -vq=" " 'BEGIN{printf""}{printf(NR>1?",":"")q$0q}END{print""}' |cut -c2- |sed 's/ ,/,/g' |sed '1,$s/\([^,]*,[^,]*,[^,]*,[^,]*,[^,]*,\)/\1\n\\033[1;32m\t          /g')
+#awk -vq=" " 'BEGIN{printf""}{printf(NR>1?",":"")q$0q}END{print""}' |cut -c2- |sed 's/ ,/,/g' |sed '1,$s/\([^,]*,[^,]*,[^,]*,[^,]*,\)/\1\n\\033[1;32m\t          /g' |sed 's/\b\(.\)/\u\1/g')
+
+## how many system users are there, only check uid <1000 and has a login shell
+SYSTEMUSERCOUNT=$(cat /etc/passwd |egrep '\:x\:10[0-9][0-9]' |grep '\:\/bin\/bash' |wc -l)
+
+## who is a system user, only check uid <1000 and has a login shell
+SYSTEMUSER=$(cat /etc/passwd |egrep '\:x\:10[0-9][0-9]' |egrep '\:\/bin\/bash|\:\/bin/sh' |awk '{if ($0) print}' |awk -F ':' {'print $1'} |awk -vq=" " 'BEGIN{printf""}{printf(NR>1?",":"")q$0q}END{print""}' |cut -c2- |sed 's/ ,/,/g' |sed '1,$s/\([^,]*,[^,]*,[^,]*,[^,]*,[^,]*,\)/\1\n\\033[1;32m\t          /g')
+
+## print any authorized ssh-key-user of a existing system user
+KEYUSER=$(for i in $(cat /etc/passwd |egrep '\:x\:10[0-9][0-9]' |awk -F ':' {'print $6'}) ; do cat $i/.ssh/authorized_keys  2> /dev/null |grep ^ssh- |awk '{print substr($0, index($0,$3)) }'; done |sed 's/@.*$//g'| awk -F [.] {'print $1 $2'} |sed 's/\b\(.\)/\u\1/g' |awk -vq=" " 'BEGIN{printf""}{printf(NR>1?",":"")q$0q}END{print""}' |cut -c2- |sed 's/ , /, /g' |sed '1,$s/\([^,]*,[^,]*,[^,]*,[^,]*,\)/\1\n\\033[1;32m\t           /g'  )
+
+## not working
+KEYUSERCOUNT=$(for i in $(cat /etc/passwd |egrep '\:x\:10[0-9][0-9]' |awk -F ':' {'print $6'}) ; do cat $i/.ssh/authorized_keys  2> /dev/null |grep ^ssh- |awk '{print substr($0, index($0,$3)) }'; done |wc -l)
+
+## get system uptime
+UPTIME=$(uptime |cut -c2- |cut -d, -f1)
+
+## get maximum usable memory
+MEMMAX=$(echo $(cat /proc/meminfo |egrep MemTotal |awk {'print $2'})/1024 |bc)
+
+## get current free memory
+MEMFREE=$(echo $(cat /proc/meminfo |egrep MemFree |awk {'print $2'})/1024 |bc)
+
+## get maximum usable swap space
+SWAPMAX=$(echo $(cat /proc/meminfo |egrep SwapTotal |awk {'print $2'})/1024 |bc)
+
+## get current free swap space
+SWAPFREE=$(echo $(cat /proc/meminfo |egrep SwapFree |awk {'print $2'})/1024 |bc)
+
+## get current kernel version
+UNAME=$(uname -r)
+
+## get my fqdn hostname.domain.name.tld
+HOSTNAME=$fqdn
+
+## get my main ip
+IP=$(host $HOSTNAME |awk {'print $4'})
+
+## get system cpu model
+CPUMODEL=$(cat /proc/cpuinfo |egrep 'model name' |uniq |awk -F ': ' {'print $2'})
+
+## how many cpu i have
+CPUS=$(cat /proc/cpuinfo|grep processor|wc -l)
+
+## how many user logged in at the moment
+SESSIONS=$(who |wc -l)
+
+## get my username
+WHOIAM=$(whoami)
+
+## get my user id
+ID=$(id)
+
+## get runnig distribution name
+if [ -f /etc/SuSE-release ]; then
+        VERSION=$(cat /etc/SuSE-release |egrep SUSE -m 1)
+        ## get the curernt installed patch level
+        PATCHLEVEL=$(cat /etc/SuSE-release |egrep PATCHLEVEL |awk -F '= ' {'print $2'})
+        DISTRIBUTION="$VERSION SP$PATCHLEVEL"
+fi
+
+## get runnig distribution name
+if [ -f /etc/debian_version ]; then
+        PATCHLEVEL=$(cat /etc/debian_version)
+        DISTRIBUTION="Debian GNU/Linux $PATCHLEVEL"
+fi
+
+
+## get latest maintenance information
+#MAINTENANCE1=$(cat /root/.maintenance)
+function getmaintenance {
+COUNT=1
+while read line; do
+    NAME=$line;
+    echo "$COUNT $NAME"
+    COUNT=$((COUNT+1))
+done < /root/.maintenance
+}
+MAINTENANCE=$(getmaintenance)
+
+## get current storage information, how many space are left :)
+STORAGE=$(df -h |sed -e 's/^File.*$/\x1b[0;37m&\x1b[1;32m/' | sed -e 's/^Datei.*$/\x1b[0;37m&\x1b[1;32m/' |egrep -v docker )
+
+## Main Menu
+echo -e "
+${F2}============[ ${F1}System Data${F2} ]====================================================
+${F1}     Hostname ${F2}= ${F3}$HOSTNAME
+${F1}      Address ${F2}= ${F3}$IP
+${F1}       Kernel ${F2}= ${F3}$UNAME
+${F1} Distribution ${F2}= ${F3}$DISTRIBUTION
+${F1}       Uptime ${F2}= ${F3}$UPTIME
+${F1}          CPU ${F2}= ${F3}$CPUS x $CPUMODEL
+${F1}       Memory ${F2}= ${F3}$MEMFREE MB Free of $MEMMAX MB Total
+${F1}  Swap Memory ${F2}= ${F3}$SWAPFREE MB Free of $SWAPMAX MB Total
+${F1}    Processes ${F2}= ${F3}$PROCCOUNT of $PROCMAX MAX
+${F2}============[ ${F1}Storage Data${F2} ]===================================================
+${F3}${STORAGE}
+${F2}============[ ${F1}User Data${F2} ]======================================================
+${F1}     Username ${F2}= ${F3}$WHOIAM, ($APN)
+${F1}   Privileges ${F2}= ${F3}$ID
+${F1}     Sessions ${F2}= ${F3}[$SESSIONS] $LOGGEDIN
+${F1}  SystemUsers ${F2}= ${F3}[$SYSTEMUSERCOUNT] $SYSTEMUSER
+${F1}   SuperUsers ${F2}= ${F3}[$SUPERUSERCOUNT] $SUPERUSER
+${F1}  SshKeyUsers ${F2}= ${F3}[$KEYUSERCOUNT] $KEYUSER
+${F2}============[ ${F1}Environment Data${F2} ]===============================================
+${F1}     Function ${F2}= ${F3}$SYSFUNCTION
+${F1}  Environment ${F2}= ${F3}$SYSENV
+${F1}Service Level ${F2}= ${F3}$SYSSLA
+${F2}============[ ${F1}Maintenance Information${F2} ]========================================
+${F4}$(getmaintenance)
+${F2}=============================================================[ ${F1}$version${F2} ]==
+${F1}
+"

listlog.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+MAINLOG="/root/.maintenance"
+
+## don't start as root
+if [ $(whoami) != root ]; then
+    echo "run as root only"
+    exit 1
+fi
+
+if [ ! -f "$MAINLOG" ]; then
+    echo "Maintenance Logfile not found: $MAINLOG"
+    exit 1
+fi
+
+function getmaintenance {
+
+    COUNT=1
+    while read line; do
+        NAME=$line;
+        echo "$COUNT $NAME"
+        COUNT=$((COUNT+1))
+    done < $MAINLOG
+}
+
+getmaintenance
+exit 0

rmlog.sh

@@ -0,0 +1,10 @@
+E_NOARGS=3
+if [ -z "$1" ]
+then
+  echo "Usage: "
+  echo "  ./$(basename $0) \"added new guest account\" "
+  echo
+  exit $E_NOARGS
+fi
+sed -i "$1"'d' /root/.maintenance
+exit 0