Useful & colourful MOTD
At home, I run 3 machines as small servers, but I haven’t set up a monitoring system. Honestly, I probably never will.
So I did the next best thing: a nice MOTD.
Inspiration
A friend who’s also an IT engineer showed me this reddit post, and the associated Github repo.
These two articles were also quite useful ownyourbits.com article and linuxconfig.org.
Scripts
RAM usage
#!/bin/bash
bar_fill="="
bar_empty="\033[1;90m=\033[0m"
endpost_left="["
endpost_right="]"
line=" "
echo -e "\n\033[1m\e[38;5;117mRAM\e[0m\033[0m"
echo -e " Total\tUsed\t\tFree\t\tBuff/Cache"
free | cut -d':' -f 2 -sz | while read totl used free shared bufc available rest; do
totl_mb=$(echo "scale=2;"$totl" / 1024" | bc -l)
used_mb=$(echo "scale=2;"$used" / 1024" | bc -l)
free_mb=$(echo "scale=2;"$free" / 1024" | bc -l)
bufc_mb=$(echo "scale=2;"$bufc" / 1024" | bc -l)
echo -e "$line"$totl_mb"MB\t"$used_mb"MB\t"$free_mb"MB\t"$bufc_mb"MB"
output=$endpost_left
percent=$(echo "scale=0; 100 * "$used" / "$totl | bc -l)
# 0-69 colored green
for ((i=1; i<=34; i++))
do
if [ $(($percent / 2 + 2)) -gt $i ]
then
output+="\033[1;92m$bar_fill\033[0m"
else
output+=$bar_empty
fi
done
# 70-84 colored yellow
for ((i=35; i<=42; i++))
do
if [ $(($percent / 2 + 2)) -gt $i ]
then
output+="\033[1;93m$bar_fill\033[0m"
else
output+=$bar_empty
fi
done
# 85-100 colored red
for ((i=43; i<=50; i++))
do
if [ $(($percent / 2 + 2)) -gt $i ]
then
output+="\033[1;91m$bar_fill\033[0m"
else
output+=$bar_empty
fi
done
output+=$endpost_right" "
output+="\033[1;90m"$(echo "scale=2; 100 * "$used" / "$totl | bc -l)"% used\033[0m"
echo -e " "$output
done
Disk usage
#!/bin/bash
bar_fill="="
bar_empty="\033[1;90m=\033[0m"
endpost_left="["
endpost_right="]\n"
line=" "
declare -a df_disks=()
# df command to get disk usage
declare df_disks=$(df -h | grep '^/dev' | grep -v '/dev/loop' | grep -v '/boot/efi')
echo ""
echo -e "\033[1m\e[38;5;117mFilesystem\e[0m\033[0m $line Size Used Avail Use% Mounted on"
IFS=$'\n'
for df_line in $df_disks
do
echo "$line$df_line"
output=$endpost_left
diskPercent="$(sed 's/%.*//' <<< "$df_line" | grep -oP "\S+$" )"
# 0-69 colored green
for ((i=1; i<=34; i++))
do
if [ $(($diskPercent / 2 + 2)) -gt $i ]
then
output+="\033[1;92m$bar_fill\033[0m"
else
output+=$bar_empty
fi
done
# 70-84 colored yellow
for ((i=35; i<=42; i++))
do
if [ $(($diskPercent / 2 + 2)) -gt $i ]
then
output+="\033[1;93m$bar_fill\033[0m"
else
output+=$bar_empty
fi
done
# 85-100 colored red
for ((i=43; i<=50; i++))
do
if [ $(($diskPercent / 2 + 2)) -gt $i ]
then
output+="\033[1;91m$bar_fill\033[0m"
else
output+=$bar_empty
fi
done
output+=$endpost_right
printf "$line$output"
done
Services
#!/bin/bash
ServiceFile="/etc/update-motd.d/services-list.txt"
declare -a serviceStatus=()
declare -a servicesName=()
readarray -t servicesName < $ServiceFile
# Get status of all services
for service in "${servicesName[@]}"
do
if [ -n "$service" ]; then
serviceStatus+=($(systemctl is-active "$service.service"))
fi
done
# Maximum column width
width=$((49-2))
# Current line and line length
line=" "
lineLen=0
echo ""
echo -e "\033[1m\e[38;5;117mServices running\e[0m\033[0m"
longest=$(wc -L $ServiceFile | sed -e 's/\s.*$//')
for i in ${!serviceStatus[@]}
do
# Next line and next line length
next=" ${serviceName[$i]}: \e[5m${serviceStatus[$i]}"
nextLen=$((1+${#next}))
# If the current line will exceed the max column with then echo the current line and start a new line
if [[ $((lineLen+nextLen)) -gt width ]]; then
echo -e "$line"
lineLen=0
line=" "
fi
lineLen=$((lineLen+nextLen))
# Color the next line green if it's active, else red
if [[ "${serviceStatus[$i]}" == "active" ]]; then
line+="${servicesName[$i]}: \e[32m✔ ${serviceStatus[$i]}\e[0m "
else
line+="${servicesName[$i]}: \e[31m▲ ${serviceStatus[$i]}\e[0m "
fi
done
# echo what is left
echo -e "$line"
Uptime & CPU Load
#!/bin/bash
# R cup rer le loadavg
read one five fifteen rest < /proc/loadavg
echo ""
echo -e "\033[1m\e[38;5;117mUptime\e[0m\033[0m"
echo " "$(uptime -p)
echo -e " since" $(uptime -s)
echo ""
echo -e "\033[1m\e[38;5;117mCPU Load\e[0m\033[0m"
echo -e " 1min\t\t5min\t\t15min"
echo -e " $one\t\t$five\t\t$fifteen\n"
License
MIT License
Original work copyright (c) 2018 Heholord & HermannBjorgvin
Modified work copyright (c) 2020 ctdhr Daher
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.