Bash Script store cat output in variable and then echo it [duplicate]

Question

I am trying to store a cat output into a variable and then trying to echo it. and then I would like to kill the process.

#!/bin/bash

var = $(cat tmp/pids/unicorn.pid)

echo $var
sudo kill -QUIT $var

Please if anyone can tell where I am going wrong

Answer 1

Variable assignments in bash should not have any spaces before or after the equal sign. It should be like this:

#!/bin/bash
var=$(cat tmp/pids/unicorn.pid)
echo "$var"

Which can be written more idiomatically as

#!/bin/bash
var=$(< tmp/pids/unicorn.pid)
echo "$var"