Need to create a simple script using MD5, SSH... Post: 302501137

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Top Forums Shell Programming and Scripting Need to create a simple script using MD5, SSH... Post 302501137 by zixzix01 on Wednesday 2nd of March 2011 06:09:41 PM

03-02-2011

Registered User

Thank you very much for your quick reply. This seems to be something I can shoot off of. Thank you for an introduction.

I think though that the script should not really base itself on a "master" server. I want to check all the servers at once, and find out the latest, most important files, whether they are on the main server or not. Do you understand what I mean.

I think I can work off of your example and see if I can work something out. But if you have any other suggestions I would love to hear them!

My boss had his script starting with declaring something and then he used the Vi file with the /pathname/files which differed for that declaration in a string:
Something to the effect of how you proposed:

Code:

for box in node1 node2 node3       # check each remote mirror
    do
        t=$(ssh myusername@$box "md5 /path/to/file/$bname" ) 
        test_hash=$(echo "$t" | awk '{print $4}')
        if [ "$hash"  != "$test_hash ] ;  then         # files are not identical
             scp $fname myusername@$box:/path/to/file/$bname
             ssh /path/to/file/$bname "chmod 775 /path/to/file/$bname"
        fi

I think he declares the "t" beforehand, and then assigns the values from one of the hostname sripts!

Code:

Ask your boss about the chmod statement.  You may not need it.

I don't think I need to change permissions on the files, he didn't use that in his script!

Thank you so much for all your help!
Ivan

P.S. Hey while I have you, how can I read his scripts that he made. They are executable and just say hostname, and host. If I open them with Vi they just read "executable" on the bottom! Weird! I'm trying to understand his approach to scripting, he's amazing!

zixzix01

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LEARN ABOUT DEBIAN

freebsd-brandelf

BRANDELF(1)						    BSD General Commands Manual 					       BRANDELF(1)

NAME

     brandelf -- mark an ELF binary for a specific ABI

SYNOPSIS

     brandelf [-lv] [-f ELF_ABI_number] [-t string] file ...

DESCRIPTION

     The brandelf utility marks an ELF binary to be run under a certain ABI for FreeBSD.

     The options are as follows:

     -f ELF_ABI_number
	     Forces branding with the supplied ELF ABI number.	Incompatible with the -t option.  These values are assigned by SCO/USL.

     -l      Writes the list of all known ELF types to the standard error.

     -v      Turns on verbose output.

     -t string
	     Brands the given ELF binaries to be of the string ABI type.  Currently supported ABIs are ``FreeBSD'', ``Linux'', and ``SVR4''.

     file    If -t string is given it will brand file to be of type string, otherwise it will simply display the branding of file.

EXIT STATUS

     Exit status is 0 on success, and 1 if the command fails if a file does not exist, is too short, fails to brand properly, or the brand
     requested is not one of the known types and the -f option is not set.

EXAMPLES

     The following is an example of a typical usage of the brandelf command:

	   brandelf file
	   brandelf -t Linux file

SEE ALSO

     The Santa Cruz Operation, Inc., System V Application Binary Interface, http://www.sco.com/developer/devspecs/, April 29, 1998 (DRAFT).

HISTORY

     The brandelf manual page first appeared in FreeBSD 2.2.

AUTHORS

     This manual page was written by John-Mark Gurney <gurney_j@efn.org>.

BSD
								 February 6, 1997							       BSD