I made this motd script:
#!/bin/bash
# Calulate avg CPU usage
usage=$((100-$(vmstat 1 2|tail -1|awk '{print $15}')))
aptlist=$(apt list --upgradable 2> /dev/null | sed 1d)
# Check if current usage isn't to high, else don't display the motd
if [[ ${usage%.*} -ge 95 ]];
then
printf "motd disabled because current usage is %s\n" "$usage"
else
# The magic
date=$(date)
# usage=$(tail /proc/loadavg | awk '{print $1}')
root_usage=$(df -h / | awk '/\// {print $(NF-1)}')
# memory_usage=$(free -m | grep Mem | awk '{print 100/$2*($2-$6+$5)}' | xargs printf "$1""%.2f")
memory_usage=$(printf "%0.2f MB %d%%\n" $(( $(sed -E '/^(MemTotal|MemFree|Cached|Buffers): *([0-9]*).*/'\
'{s//\2/;H;};$!d;x;s/[[:cntrl:]]//;s__/1024-_g;s_$_/1024_' /proc/meminfo) )) \
$(( $(sed -E '/^(MemTotal|MemFree|Cached|Buffers): *([0-9]*).*/'\
'{s//\2/;H;};$!d;x;s/[[:cntrl:]]//;s_([^\n]+)\n_@\1@100*(\1/1024-(_;s_\n_/1024+_g;'\
's_@([^@]+)@(.*)$_\2/1024))/(\1/1024)_' /proc/meminfo) )) | awk '{print $3}')
users=$(users | wc -w)
time=$(uptime | grep -ohe 'up .*' | sed 's/,/\ hours/g' | awk '{ printf $2" "$3 }')
processes=$(ps aux | wc -l)
ip=$(ip addr | awk '/inet / { print $2 }' | sed -n '2{p;q}' | cut -d '/' -f1)
ipv6=$(ip -6 addr |awk '{print $2}'| grep -v "^::" | grep "/" | head -n1 | cut -d '/' -f1)
packages=$(dpkg-query -l | grep -c "^ii")
updates=$(echo -n $aptlist | wc -l )
secupdates=$(echo $aptlist | grep -c security )
# The updates and secupdates var get's it's info thanks to this crontab/command
# sudo apt-get -s dist-upgrade | grep "^Inst" | wc -l > /etc/update-motd.d/pkg.stats && apt-get -s dist-upgrade | grep "^Inst" | grep -i security | wc -l >> /etc/update-motd.d/pkg.stats
# sudo crontab -l | { cat; echo "0 0 * * * apt-get -s dist-upgrade | grep "^Inst" | wc -l > /etc/update-motd.d/pkg.stats && apt-get -s dist-upgrade | grep "^Inst" | grep -i security | wc -l >> /etc/update-motd.d/pkg.stats"; } | crontab -
# If you wish to not use crontab, switch the updates and secupdates comment's.
# Header & motd
printf "Welcome to %s (%s)" "$(lsb_release -s -d)" "$(uname -rm)"
printf "\n"
echo " __ __ __ _ __ _______"
echo " / //_/ / /(_)/ /__ ____ \|_____|"
echo " / ,< / // // //_// __ \ | │ │ |"
echo " / /| | / // // ,< / /_/ / | |"
echo " /_/ |_|/_//_//_/|_| \____/ ◯_____| "
echo
# System information
echo "System information as of: $date"
echo
# printf "System Load:\t%s\tSystem Uptime:\t%s\n" "$load" "$time" # Use this one if you prefer the linux proc avg
printf "System Load:\t%s%%\tSystem Uptime:\t%s\n" "$usage" "$time" # Overall processor usage
printf "Memory Usage:\t%s\tIP Address:\t%s\n" "$memory_usage" "$ip"
if [[ $ipv6 == "" ]]
then
printf "Usage On /:\t%s\tIPv6 Addres:\tNo ipv6 address found\n" "$root_usage"
else
printf "Usage On /:\t%s\tIPv6 Addres:\t%s\n" "$root_usage" "$ipv6"
fi
printf "Local Users:\t%s\tProcesses:\t%s\n" "$users" "$processes"
printf "Packages dpkg:\t%s\tSession fortune:\ \n\n" "$packages"
/usr/games/fortune
# Check if there are updates
echo
if [[ $updates != 0 ]]
then
printf "%s updates can be installed immediately.\n" "$updates"
printf "%s of these updates are security updates.\n" "$secupdates"
printf "To see these additional updates run: apt list --upgradable\n\n"
else
printf "System is up-to-date!\n\n"
fi
# Check if a reboot is needed
if [[ -f /var/run/reboot-required ]]
then
echo '*** System restart required ***'
fi
fi
printf "%s" "$aptlist"
Now the execution time is 2 seconds b/c of these two commands:
usage=$((100-$(vmstat 1 2|tail -1|awk '{print $15}')))
aptlist=$(apt list --upgradable 2> /dev/null | sed 1d)
I tried to find a way to run both of the commands at the same time, so that it only takes a second (which would be amazing). Sadly using var1=cmd1 & var2=cmd2 doesn't work and only the second get's executed properly.
Anyone has a clue how to run two commands that go into each of their variables at the same time? (i prefer to use the default tools in debian/Raspberry but if it's impossible, i'm ok to install that package :))
Thank you for reading!
