diff will usually only take one file from STDIN. This is a method to take the result of two streams and compare with diff. The example I use to compare two iTunes libraries but it is generally applicable.

diff <(cd /path-1; find . -type f -print | egrep -i '\.m4a$|\.mp3$') <(cd /path-2; find . f -print | egrep -i '\.m4a$|\.mp3$')
diff is designed to compare two files. You can also compare directories. In this form, bash uses 'process substitution' in place of a file as an input to diff. Each input to diff can be filtered as you choose. I use find and egrep to select the files to compare.

3
By: drewk
2009-08-17 00:49:31

What Others Think

vimdiff is also nice, you can navigate between two files being diffed, and the diff updates as you change either file. Here you could just replace 'diff' with 'vimdiff'.
bwoodacre · 631 weeks and 5 days ago
This is a good option for the programmers especially those who have doubts about the programming code as this is a helpful page to clear your doubts related to programming and in the current post we can see they are discussing a method the page here
Dwyane · 9 weeks ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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