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This will extract the differing CSS entries of two files. I've left the initial character (plus or space) in output to show the real differing line, remove the initial character to get a working CSS file. The output CSS file is usable by either adding it in a below the to original.css, or by only using the output but adding @import url("original.css"); in the beginning.
This is very useful for converting Wordpress theme copies into real Wordpress child themes.
Could exclude common lines within entries too, I guess, but that might not be worth the complexity.
Removes an extra character and space.
Diffs two xml files by formatting them first using xmllint and then invoking diff.
Usage: diffxml XMLFile1 XMLFile2
Maybe very limited in its applicability but could be of use at times.
LC_ALL=C is here to always grep on "differ" whatever your language env.
xargs -n 2 to run gvim -d with 2 arguments
gvim --nofork to use only one instance of gvim
Description is moved to "Sample output" because the html sanitizer for commandlinefu breaks the examples..
Using sed to print newlines as doing it in one line with diff is non-trivial.
Sometimes you need to compare two config files on different servers. Put the file names into the above script and let 'er rip.
The result of this command is a tar with all files that have been modified/added since revision 1792 until HEAD. This command is super useful for incremental releases.
M - current revision, N - older revision
This form is used in patches, svn, git etc. And I've created an alias for it:
alias diff='diff -Naur --strip-trailing-cr'
The latter option is especially useful, when somebody in team works in Windows; could be also used in commands like
svn diff --diff-cmd 'diff --strip-trailing-cr'...
If colordiff utility installed, it is sometimes handy to call this command. Of course, you should create an alias for it. E.g. svndiff.
I often use it to find recently added ou removed device, or using find in /dev, or anything similar.
Just run the command, plug the device, and wait to see him and only him
I had the problem that the Md5 Sum of a file changed after copying it to my external disk.
This unhandy command helped me to fix the problem.
Use zsh process substitution syntax.
**NOTE** Tekhne's alternative is much more succinct and its output conforms to the files actual contents rather than with white space removed
My command on the other hand uses bash process substitution (and "Minimal" Perl), instead of files, to first remove leading and trailing white space from lines, before diff'ing the streams. Very useful when differences in indentation, such as in programming source code files, may be irrelevant
Checks if a web page has changed. Put it into cron to check periodically.
Change http://www.page.de/test.html and firstname.lastname@example.org for your needs.