Your Linux Data Center Experts

Here's some handy commands I used today that perhaps not too many folks know about:

interdiff gives you a diff between two diff files. Great for checking if two patches are the same or what has changed between two versions of a patch. They have to be patches against the same file base, but still very handy.

openssl command line can be used to look at the information from a ssl cert .pem file, just do: 'openssl x509 -text -in /path/to/your/ssl/cert.pem' and it will dump out all kinds of information about the ssl cert.

mussh (which you can find at: http://sourceforge.net/projects/mussh/ ) allows you to run a command via ssh on a list of hosts. Handy for running things like 'yum check-update' or 'apt-get –dry-run upgrade'.

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