How do disable root ssh login?

One of the biggest security holes is to allow direct logging in as root through ssh.

To disable it:
in /etc/ssh/sshd_config edit "PermitRootLogin no" and then `/etc/init.d/sshd restart`

But remember to add some user to the "wheel" group to be able 'su'

Seven Advantages Of Java

Java has significant advantages over other languages that make it suitable for any programming task.

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mysql 5.0 upgrade to 5.1

The 5.1 series of MySQLwas unmasked for the gentoo portage. When upgrading from an older major version (including 5.0), you will be required to rebuild everything linked to the libmysqlclient.so.15 and libmysqlclient_r.so.15. You can do this by installing app-portage/gentoolkit and running: # revdep-rebuild --library libmysqlclient.so.15 # revdep-rebuild --library libmysqlclient_r.so.15 If you use the Portage 2.2 series, you may also use: # emerge @preserved-rebuild The official upgrade documentation is available here: http://dev.mysql.com/doc/refman/5.1/en/upgrading.html Note that existing databases may need converting as well, again including those upgrading from 5.0 to 5.1.