Bash script Help please

[expandables]

Hi good day, I am trying to write a script i want the script to check for raspberry pi serial if none is the serial echo "test"

For example i have this

Code: Select all

#!/bin/bash
    serial=$(cat /proc/cpuinfo | awk '/Serial/ {print $3}' | tail -c 9)

    while [ $serial != "1111111" ] || [ $serial != "2222222" ]; do
      echo "test"
    done

The problem is for example one of the pi serial is "2222222" but the pi still echos "test"
Those anyone knows the problem? Appreciate the help.

[expandables]

I guess am trying to write a script that says if this serial is not equal to X then try another number if no number matches then echo test.

[joan]

You probably mean to have logical and (&&) rather than logical or (||). As written the statement must always be true.

[DougieLawson]

You need to change

Code: Select all

||

to

Code: Select all

&&

when working with two negative compares.

[expandables]

You need to change

Code: Select all

||

to

Code: Select all

&&

when working with two negative compares.

OK thanks for the help that works! "Putting on my green sunglasses instead of mrgreen" .