Shell How get tail command from variable in script file

[andrian]

Hi, please help me.
How get string line use tail command from variable in shell script file.
For example:

#!/bin/sh
a=`timeout 60 tail -f /var/log/mpd.log | grep "Device not configured"`
b=`tail -n 1 $a`   #this string is error because "$a" not file!

 

[youngunix]

Is this " ..."$a" not file!" the actually error that you get when running the script?

 

[SirDice]

I'm sure there are tons of better ways to do this:

b=`echo $a | tail -n 1`

 

[andrian]

Thank you SirDice.