add update.motd

update.motd/10-hostname-color

@@ -0,0 +1,3 @@
+#!/bin/bash
+
+/usr/bin/env figlet "$(hostname)" | /usr/games/lolcat -f

update.motd/20-sysinfo

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+# get load averages
+IFS=" " read LOAD1 LOAD5 LOAD15 <<<$(cat /proc/loadavg | awk '{ print $1,$2,$3 }')
+# get free memory
+IFS=" " read USED AVAIL TOTAL <<<$(free -htm | grep "Mem" | awk {'print $3,$7,$2'})
+# get processes
+PROCESS=`ps -eo user=|sort|uniq -c | awk '{ print $2 " " $1 }'`
+PROCESS_ALL=`echo "$PROCESS"| awk {'print $2'} | awk '{ SUM += $1} END { print SUM }'`
+PROCESS_ROOT=`echo "$PROCESS"| grep root | awk {'print $2'}`
+PROCESS_USER=`echo "$PROCESS"| grep -v root | awk {'print $2'} | awk '{ SUM += $1} END { print SUM }'`
+# get processors
+PROCESSOR_NAME=`grep "model name" /proc/cpuinfo | cut -d ' ' -f3- | awk {'print $0'} | head -1`
+PROCESSOR_COUNT=`grep -ioP 'processor\t:' /proc/cpuinfo | wc -l`
+
+W="\e[0;39m"
+G="\e[1;32m"
+
+echo -e "
+${W}system info:
+$W  Distro......: $W`cat /etc/*release | grep "PRETTY_NAME" | cut -d "=" -f 2- | sed 's/"//g'`
+$W  Kernel......: $W`uname -sr`
+
+$W  Uptime......: $W`uptime -p`
+$W  Load........: $G$LOAD1$W (1m), $G$LOAD5$W (5m), $G$LOAD15$W (15m)
+$W  Processes...:$W $G$PROCESS_ROOT$W (root), $G$PROCESS_USER$W (user), $G$PROCESS_ALL$W (total)
+
+$W  CPU.........: $W$PROCESSOR_NAME ($G$PROCESSOR_COUNT$W vCPU)
+$W  Memory......: $G$USED$W used, $G$AVAIL$W avail, $G$TOTAL$W total$W"

update.motd/20-uptime

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+printf "\n"
+uptime -p

update.motd/35-diskspace

@@ -0,0 +1,41 @@
+#!/bin/bash
+
+# config
+max_usage=90
+bar_width=50
+# colors
+white="\e[39m"
+green="\e[1;32m"
+red="\e[1;31m"
+dim="\e[2m"
+undim="\e[0m"
+
+# disk usage: ignore zfs, squashfs & tmpfs
+mapfile -t dfs < <(df -H -x zfs -x squashfs -x tmpfs -x devtmpfs -x overlay --output=target,pcent,size | tail -n+2)
+printf "\ndisk usage:\n"
+
+for line in "${dfs[@]}"; do
+    # get disk usage
+    usage=$(echo "$line" | awk '{print $2}' | sed 's/%//')
+    used_width=$((($usage*$bar_width)/100))
+    # color is green if usage < max_usage, else red
+    if [ "${usage}" -ge "${max_usage}" ]; then
+        color=$red
+    else
+        color=$green
+    fi
+    # print green/red bar until used_width
+    bar="[${color}"
+    for ((i=0; i<$used_width; i++)); do
+        bar+="="
+    done
+    # print dimmmed bar until end
+    bar+="${white}${dim}"
+    for ((i=$used_width; i<$bar_width; i++)); do
+        bar+="="
+    done
+    bar+="${undim}]"
+    # print usage line & bar
+    echo "${line}" | awk '{ printf("%-31s%+3s used out of %+4s\n", $1, $2, $3); }' | sed -e 's/^/  /'
+    echo -e "${bar}" | sed -e 's/^/  /'
+done

update.motd/40-services

@@ -0,0 +1,37 @@
+#!/bin/bash
+
+# set column width
+COLUMNS=3
+# colors
+green="\e[1;32m"
+red="\e[1;31m"
+undim="\e[0m"
+
+services=("zabbix-server" "zabbix-agent2" "apache2" "mariadb" "fail2ban" "chrony" "sendmail")
+# sort services
+IFS=$'\n' services=($(sort <<<"${services[*]}"))
+unset IFS
+
+service_status=()
+# get status of all services
+for service in "${services[@]}"; do
+    service_status+=($(systemctl is-active "$service"))
+done
+
+out=""
+for i in ${!services[@]}; do
+    # color green if service is active, else red
+    if [[ "${service_status[$i]}" == "active" ]]; then
+        out+="${services[$i]}:,${green}${service_status[$i]}${undim},"
+    else
+        out+="${services[$i]}:,${red}${service_status[$i]}${undim},"
+    fi
+    # insert \n every $COLUMNS column
+    if [ $((($i+1) % $COLUMNS)) -eq 0 ]; then
+        out+="\n"
+    fi
+done
+out+="\n"
+
+printf "\nservices:\n"
+printf "$out" | column -ts $',' | sed -e 's/^/  /'

update.motd/50-fail2ban

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+logfile='/var/log/fail2ban.log*'
+mapfile -t lines < <(grep -hioP '(\[[a-z-]+\]) ?(?:restore)? (ban|unban)' $logfile | sort | uniq -c)
+jails=($(printf -- '%s\n' "${lines[@]}" | grep -oP '\[\K[^\]]+' | sort | uniq))
+
+out=""
+for jail in ${jails[@]}; do
+    bans=$(printf -- '%s\n' "${lines[@]}" | grep -iP "[[:digit:]]+ \[$jail\] ban" | awk '{print $1}')
+    restores=$(printf -- '%s\n' "${lines[@]}" | grep -iP "[[:digit:]]+ \[$jail\] restore ban" | awk '{print $1}')
+    unbans=$(printf -- '%s\n' "${lines[@]}" | grep -iP "[[:digit:]]+ \[$jail\] unban" | awk '{print $1}')
+    bans=${bans:-0} # default value
+    restores=${restores:-0} # default value
+    unbans=${unbans:-0} # default value
+    bans=$(($bans+$restores))
+    diff=$(($bans-$unbans))
+    out+=$(printf "$jail, %+3s bans, %+3s unbans, %+3s active" $bans $unbans $diff)"\n"
+done
+
+printf "\nfail2ban status (monthly):\n"
+printf "$out" | column -ts $',' | sed -e 's/^/  /'

update.motd/50-fail2ban-status

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+# fail2ban-client status to get all jails, takes about ~70ms
+jails=($(fail2ban-client status | grep "Jail list:" | sed "s/ //g" | awk '{split($2,a,",");for(i in a) print a[i]}'))
+
+out="jail,failed,total,banned,total\n"
+
+for jail in ${jails[@]}; do
+    # slow because fail2ban-client has to be called for every jail (~70ms per jail)
+    status=$(fail2ban-client status ${jail})
+    failed=$(echo "$status" | grep -ioP '(?<=Currently failed:\t)[[:digit:]]+')
+    totalfailed=$(echo "$status" | grep -ioP '(?<=Total failed:\t)[[:digit:]]+')
+    banned=$(echo "$status" | grep -ioP '(?<=Currently banned:\t)[[:digit:]]+')
+    totalbanned=$(echo "$status" | grep -ioP '(?<=Total banned:\t)[[:digit:]]+')
+    out+="$jail,$failed,$totalfailed,$banned,$totalbanned\n"
+done
+
+printf "\nfail2ban status:\n"
+printf $out | column -ts $',' | sed -e 's/^/  /'

update.motd/60-upgrades

@@ -0,0 +1,12 @@
+#!/bin/sh
+printf "\n"
+number=`apt list --upgradable 2> /dev/null | grep 'upgradable' | wc -l`
+printf "Available updates : %s\n" $number
+
+if [ $number -gt 0 ]; then
+    printf "\033[1;31mSystem needs %s updates\033[0m\n" $number
+    apt list --upgradable 2> /dev/null | grep 'upgradable'
+else
+    printf "\033[1;32mSystem is uptodate\033[0m\n"
+fi
+echo