Add Message of the day to RPI

I recently decided to implement a message of the day (MOTD) on my Raspberry Pi.
My goal was to have certain information displayed upon each login, similar to what’s shown in the image.

Message of the Day

This can be accomplished by adding commands to the ~/bash\_profile file, which is executed when an interactive login shell is started (like when you SSH into the Pi).

I found a sample script on the Raspberry Pi website, but it displayed temperatures in Fahrenheit. I quickly converted it to Celsius, made a few other adjustments (like location settings), but it still failed to retrieve the temperature. After some debugging, I discovered that the regular expression in the sed command wasn’t correctly parsing the minus sign for sub-zero temperatures (a common occurrence in Oslo!). I’ve fixed that as well. The final, working script is below. Just append it to your ~/.bash_profile file.

let upSeconds="$(/usr/bin/cut -d. -f1 /proc/uptime)"
let secs=$((${upSeconds}%60))
let mins=$((${upSeconds}/60%60))
let hours=$((${upSeconds}/3600%24))
let days=$((${upSeconds}/86400))
UPTIME=`printf "%d days, %02dh%02dm%02ds" "$days" "$hours" "$mins" "$secs"`

# get the load averages
read one five fifteen rest < /proc/loadavg

echo "$(tput setaf 2)
   .~~.   .~~.    `date +"%A, %e %B %Y, %r"`
  '. \ ' ' / .'   `uname -srmo`$(tput setaf 1)
   .~ .~~~..~.
  : .~.'~'.~. :   $(tput setaf 3)Uptime.............: $(tput sgr0)${UPTIME}$(tput setaf 1)
 ~ (   ) (   ) ~  $(tput setaf 3)Memory.............: $(tput sgr0)`cat /proc/meminfo | grep MemFree | awk {'print $2'}`kB (Free) / `cat /proc/meminfo | grep MemTotal | awk {'print $2'}`kB (Total)$(tput setaf 1)
( : '~'.~.'~' : ) $(tput setaf 3)Load Averages......: $(tput sgr0)${one}, ${five}, ${fifteen} (1, 5, 15 min)$(tput setaf 1)
 ~ .~ (   ) ~. ~  $(tput setaf 3)Running Processes..: $(tput sgr0)`ps ax | wc -l | tr -d " "`$(tput setaf 1)
  (  : '~' :  )   $(tput setaf 3)IP Addresses.......: $(tput sgr0)`/sbin/ifconfig eth0 | /bin/grep "inet addr" | /usr/bin/cut -d ":" -f 2 | /usr/bin/cut -d " " -f 1` and `wget -q -O - http://icanhazip.com/ | tail`$(tput setaf 1)
   '~ .~~~. ~'    $(tput setaf 3)Weather............: $(tput sgr0)`curl -s "http://rss.accuweather.com/rss/liveweather_rss.asp?metric=1&locCode=EUR|NO|OSLO|OSLO|" | sed -n '/Currently:/ s/.*: \(.*\): \(.[0-9]*\)\([CF]\).*/\2°\3, \1/p'`$(tput setaf 1)
       '~'        $(tput setaf 3)CPU Temp...........: $(tput sgr0)`awk '{printf("%.1f °C\n",$1*1.0/1e3)}' /sys/class/thermal/thermal_zone0/temp`
$(tput sgr0)"