Compare two md5sum Post: 302981048

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Top Forums Shell Programming and Scripting Compare two md5sum Post 302981048 by Don Cragun on Tuesday 6th of September 2016 10:09:14 PM

09-06-2016

Registered User

Asking questions is not an insult! We are here to help you learn how to use the tools available on your system. And, your attempt was very close to working. There were only two small problems:

you can't assign a value to a positional parameter using $2=string, and
you need to use a $ to expand the contents of a shell variable.

So, if you change your script to something more like:

Code:

#!/bin/bash
last_checksum=52f8422918c5347166dbb40c76f95e9c

checksum=`curl --silent httptheurliwanttocheck | md5sum`

if [ "$last_checksum" = "$checksum" ]
then
    echo "nothing"
else
    echo "change"
fi

You should get the results you want when you run your script. The backquotes you are using for command substitution are obsolescent. The preferred method would be:

Code:

checksum=$(curl --silent httptheurliwanttocheck | md5sum)

but either form will work for now.

If that works for you, you can then think about replacing the echo "change" with a command to send yourself mail. But, unless you are scheduling this script to run when you're are there to see the results, there isn't any reason to do that.

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LEARN ABOUT DEBIAN

time-admin

time-admin(1)						      General Commands Manual						     time-admin(1)

NAME

       time-admin - Time Administration Tool

SYNOPSIS

       time-admin [OPTION...]

DESCRIPTION

       time-admin is part of the GNOME system tools, a set of tools to easily access and manage system configuration.

       time-admin  allows you to set the time, date and timezone of your system, as well as setting any time server to synchronize your local time
       server.

OPTIONS

       time-admin accepts the standard GNOME and GTK options.

AUTHORS

       time-admin was written by Carlos Garnacho Parro <garnacho@tuxerver.net> and others.

       This manual page was written by Sven Arvidsson <sa@whiz.se>, for the Debian project (but may be used by others).

SEE ALSO

       services-admin(1), shares-admin(1), network-admin(1), users-admin(1), gtk-options(7), gnome-options(7)

       The online documentation available through the program's Help menu.

GNOME
								    2007-05-08							     time-admin(1)