UNIX for Dummies Questions & Answers

I have a Korn shell that successfully queries the system temperature of my server. I am able to use the envmon env_current_temp to display just the last 2 characters of output. The full output is:
envmon:
env_current_temp = 36

I tried writing the value (36) out to txt, then reading the txt file as a variable, but I am stuck.

If I hardcode curt=36 then it works fine, so I think it is just a matter of getting the 2 last characters into a numeric variable.

#! /bin/ksh
echo Temperature
/sbin/sysconfig -q envmon env_current_temp | cut -b20-21
echo $curt
#fdeg=$(echo "scale=2; ($curt*9/5) +32" | bc -l)
#kdeg=$(echo "scale=2; ($curt+273.15)" | bc -l)
#echo "$curt Celsius $fdeg Fahrenheit $kdeg Kelvin"

Any help would be greatly appreciated.

grep -v '= *$' <textfile>

Assuming your ksh is ksh93

Code:

curt=$(/sbin/sysconfig -q envmon env_current_temp)
curt=${curt: -2}

That worked, thank you both!

I found perhaps a more streamlined approach than before.
Here is the final code. Using rsh, I also grabbed the temperatures of the other Unix servers in the room.

Thanks again for the help, it really pointed me in the right direction!

#! /bin/ksh
clear
echo
echo Current Server2 Temperature:
curt2=$(rsh -l mfg Server2 /sbin/sysconfig -q envmon env_current_temp |grep -v envmon |cut -b20-21)
fdeg2=$(echo "scale=2; ($curt2*9/5) +32" | bc -l)
kdeg2=$(echo "scale=2; ($curt2+273.15)" | bc -l)
echo "$curt2 Celsius $fdeg2 Fahrenheit $kdeg2 Kelvin"
echo
echo Current Server7 Temperature:
curt7=$(rsh -l mfg Server7 /sbin/sysconfig -q envmon env_current_temp |grep -v envmon |cut -b20-21)
fdeg7=$(echo "scale=2; ($curt7*9/5) +32" | bc -l)
kdeg7=$(echo "scale=2; ($curt7+273.15)" | bc -l)
echo "$curt7 Celsius $fdeg7 Fahrenheit $kdeg7 Kelvin"
echo
echo Current Server8 Temperature:
curt8=$(rsh -l mfg Server8 /sbin/sysconfig -q envmon env_current_temp |grep -v envmon |cut -b20-21)
fdeg8=$(echo "scale=2; ($curt8*9/5) +32" | bc -l)
kdeg8=$(echo "scale=2; ($curt8+273.15)" | bc -l)
echo "$curt8 Celsius $fdeg8 Fahrenheit $kdeg8 Kelvin"