Create your own scripts not working

[fgl27]

How to use this featuring?

my script :

#!/bin/bash
var=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq | cut -c1-4);
echo $var "Mhz"`

But when I try to use in the app the result is

[fossfreedom]

have you made your script executable?

chmod +x cpu.sh

[fgl27]

if not how this works?

how this is supposed to work?
how do I set the file as a cmd there?

something is wrong I don't know what.

[fgl27]

Also this simple line as a cmd

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq | cut -c1-4

Way it does not work? just because of the |

because the simple version below works

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq

if it has a | for extra commands should not matter, is a single cmd line and outputs in a single line just like a "echo" must work but causes the same problem "sensor not supported"