mcBachmann.de TechBlog » virtual file http://blog.mcbachmann.de Der Blog zur Website ;-) Wed, 11 Jan 2012 21:12:53 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 bash: Redirect output to virtual file http://blog.mcbachmann.de/linux/bash-redirect-output-to-virtual-file http://blog.mcbachmann.de/linux/bash-redirect-output-to-virtual-file#comments Fri, 11 Sep 2009 08:05:43 +0000 Sven Bachmann http://blog.mcbachmann.de/?p=395 directory_1.txt ls dir2/ > directory_2.txt diff directory_1.txt directory_2.txt But with bash (and maybe some other shells) [...]]]> Bash has a cool feature, it allows you to redirect the output of an application to a virtual file. With this its for example possible to fast-diff two directories.

The old way would look like this:

ls dir1/ > directory_1.txt
ls dir2/ > directory_2.txt
diff directory_1.txt directory_2.txt

But with bash (and maybe some other shells) you can do the following:

diff <(ls dir1/) <(ls dir2/)

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