However running a few simple commands and updating a single file can produce a massive increase in performance.

** Please note that there are other issues that can cause poor performance **

Example Bad Network Cable, Cheap Switch, Overloaded Router, and others.

Run the following commands from the prompt.

mv /etc/sysctl.conf sysctl.bak
cd /etc
wget http://www.setupalinuxserver.com/files/sysctl.conf.txt
mv sysctl.conf.txt sysctl.conf
/sbin/sysctl -p
/sbin/sysctl -w net.ipv4.route.flush=1

You should see a performance increase right away.  Please let me know if this helps you out or not.

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Command Syntax

find /path/to/files* -mtime +5 -exec rm {} \;

Note that there are spaces between rm, {}, and \;

Explanation

• The first argument is the path to the files. This can be a path, a directory, or a wildcard as in the example above. I would recommend using the full path, and make sure that you run the command without the exec rm to make sure you are getting the right results.
• The second argument, -mtime, is used to specify the number of days old that the file is. If you enter +5, it will find files older than 5 days.
• The third argument, -exec, allows you to pass in a command such as rm. The {} \; at the end is required to end the command.

This should work on Ubuntu, Suse, Redhat, or pretty much any version of linux.

Source: http://www.howtogeek.com/howto/ubuntu/delete-files-older-than-x-days-on-linux/

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