Ssh – How do diff over ssh

diff()ssh

How do I diff files/folders across machines provided that the only connectivity available is ssh?

Best Answer

You can do it with Bash's process substitution:

 diff foo <(ssh myServer 'cat foo')

Or, if both are on remote servers:

diff <(ssh myServer1 'cat foo') <(ssh myServer2 'cat foo')

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Linux – How to diff two config files

diff <(grep -v '^#' f1) <(grep -v '^#' f2)

To avoid blank lines, and lines containing nothing but spaces, in addition to identical lines that have a single difference of added leading spaces...

diff -b \
  <(grep -vE '^([ \t]*#|^[ \t]*$)' f1)\
  <(grep -vE '^([ \t]*#|^[ \t]*$)' f2)

By this point though, I'd probably put that into a script and write something like the original suggestion that's a little more readable.

Linux – diff folders and copy results over

With linux, ssh in and use rsync

this will help

http://troy.jdmz.net/rsync/index.html

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Related Solutions

Linux – How to diff two config files

Linux – diff folders and copy results over

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