Any easy way to compare files in two different trees?

stf92 · 04-18-2014, 04:51 AM

Hi: that's more or less my question. I have /almacen and /slack12/almacen and I suspect they are identical (the trees). How would I know for certain?

Phorize · 04-18-2014, 04:59 AM

You can use diff recursively, such as:

diff -r pathtofirstdir pathtoseconddir

phenixia2003 · 04-18-2014, 05:03 AM

Hello,

For this, I usually use this one :

Code:

$ diff -qr /almacen /slack12/almacen

--
SeB

stf92 · 04-18-2014, 05:23 AM

Unbelievable. It works!

stf92 · 04-18-2014, 10:11 AM

There is something odd about this. How can diff compare binary files if he finds one while recursing? Every filename written on the console when I executed the command was a text file!

TracyTiger · 04-18-2014, 10:51 AM

Quote:

Originally Posted by stf92

There is something odd about this. How can diff compare binary files if he finds one while recursing? Every filename written on the console when I executed the command was a text file!

Simply try it.

Put identical binary files in each directory and see what happens.

Then change one of the binary files and see what happens.

Learn through experimentation... and the man pages.

EDIT: If you are referring to a different method of comparing directories, then use md5sum with the -c option. This is what Slackware uses to verify ISO directories.

neymac · 04-18-2014, 11:28 AM

If you want search for duplicated files on the same tree use FSlint, you can find it in http://slackbuilds.org. Compare binary files using diff is a very long task if you have big ones, diff compares files line by line. Or you can use the command line program Duff recommended by metaschima it's very fast

metaschima · 04-18-2014, 12:07 PM

I recommend:
http://duff.dreda.org/

stf92 · 05-17-2014, 04:54 AM

Quote:

Originally Posted by TracyTiger

Learn through experimentation... and the man pages.

That's precisely the way I don't like. Experimentation is statistically incorrect. You will precisely know what a program does by just learning what the manufacturer has to say about it, as with anything else.

schmatzler · 05-17-2014, 05:15 AM

"kompare" can also do that

beder · 05-17-2014, 10:26 AM

In my development environment I use meld to compare directory trees as well as individual files, as it gives much more options than simply a compare output (and I prefer its interface to kde's own Kompare)

stf92 · 05-17-2014, 10:36 PM

Actually, a tool which looks only for differences in size and date would be much more useful, at least in my case. That could be done by a simple algorithm that travels both trees, but this would imply the writing of a whole program, and not just a few lines of code.

Paulo2 · 05-17-2014, 11:56 PM

I didn't test this, but maybe you can give it a try

Code:

diff <(cd tree1;t1=$(find -type f -name \* -exec ls -l {} \;);paste <(cut -d' ' -f5 <<<"$t1") <(cut -d' ' -f9- <<<"$t1")) <(cd tree2;t2=$(find -type f -name \* -exec ls -l {} \;);paste <(cut -d' ' -f5 <<<"$t2") <(cut -d' ' -f9- <<<"$t2"))

It will compare a list with size (field 5) and name (field 9),
the output will be the differences, so you can take a look closely.

Replacing -f5 with -f6-8 , the list will be date, hour and name.

stf92 · 05-18-2014, 01:14 AM

iNTENTIONALLY blanked by the author.

stf92 · 05-18-2014, 02:35 AM

I broke the command into several lines for greater legibility:

Code:

semoi@server:~/STORE1/soft/linux/comparo$ cat comparo02a.sh
tree1="/home/semoi/STORE1/sma_"
tree2="/home/semoi/juan/sma_"

diff <(cd $tree1 
t1=$(find -type f -name \* -exec ls -l {} \;)
paste <(cut -d' ' -f5 <<<"$t1") <(cut -d' ' -f9- <<<"$t1") \
) <(cd $tree2 
t2=$(find -type f -name \* -exec ls -l {} \;)
paste <(cut -d' ' -f5 <<<"$t2") <(cut -d' ' -f9- <<<"$t2")
)

If I comment the paste lines out then I get no output. Why?