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Full Discussion: Rsync files check
Top Forums Shell Programming and Scripting Rsync files check Post 302986753 by jim mcnamara on Tuesday 29th of November 2016 11:11:07 PM
Old 11-30-2016
rsync does that, called a hash code. If the hash code fails rsync barfs all over the place. However to answer your question:

There are several programs for this, but cksum is more than adequate.
Example
In the oldfile directory
Code:
cd /path/to/oldfile
old=$(cksum oldfile)
cd /path/to/new/file (or use ssh for a remote file): new=$(ssh USER@IP cd /path/to/newfile && cksum newfile)
new=$(cksum oldfile)
# you get output that looks like this :
# echo "$old" 
# 2201537306 122235 oldfile
# first number == checksum, second number == line count, name of file
# test example code 
if [ "$old" = "$new"  ] ; then 
   echo 'OK'
else
   echo 'NOT OK'
fi

Beware that ssh can add extra text all by itself - nothing to do with cksum
This User Gave Thanks to jim mcnamara For This Post:
 

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aha(1)								 Ansi HTML Adapter							    aha(1)

NAME
aha - Ansi HTML Adapter SYNOPSIS
aha [options] [-f datei] DESCRIPTION
aha takes SGR-colored Input and prints W3C conform HTML-Code. aha reads the Input from a file or stdin and writes HTML-Code to stdout. OPTIONS
--help , -h , -? A help like this --black , -b Black Background and white "standard color" --pink , -p Pink Background --iso X , -i X Uses ISO 8859-X instead of utf-8. X must be 1..16 --title X , -t X Gives the html output the title --line-fix , -l Uses a fix for inputs using control sequences to change the cursor position like htop. It's a hot fix, it may not work with any pro- gram like htop. (See EXAMPLE) EXAMPLE
aha --help | aha --black --title "the awesome aha help"> aha-help.htm Creates an HTML file with the help of aha with black background colordiff oldfile.c newfile.c | aha > colordiff.htm Creates an HTML file with a colorful diff-output of two files "oldfile.c" and "newfile.c" with white background ls --color=always | aha --pink > ls.htm Creates an HTML file with a colorful ls-output with pink background. echo a | htop | aha --black --line-fix > htop.htm Creates an HTML file with the output of htop. You have to use --line-fix due the other new-line-commands htop uses. AUTHOR
Copyleft Alexander Matthes aka Ziz 2011 zizsdl@googlemail.com SEE ALSO
http://ziz.delphigl.com/tool_aha.php August 31, 2011 aha(1)
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