How to store a command in a variable in a shell script?

Question

I would like to store a command to use at a later period in a variable (not the output of the command, but the command itself)

I have a simple script as follows:

Answer 1

#!/bin/bash
#Note: this script works only when u use Bash. So, don't remove the first line.

TUNECOUNT=$(ifconfig |grep -c -o tune0) #Some command with "Grep".
echo $TUNECOUNT                         #This will return 0 
                                    #if you don't have tune0 interface.
                                    #Or count of installed tune0 interfaces.