No installable kernel was found in the defined APT sources.

Using an external SMTP with PHP on (mt)

Protect child directories with .htaccess

"Got a packet bigger than 'max_allowed_packet' bytes" MySQL error

Compare directories with diff.

Mercurial cheatsheet.

Forgot root MySQL password;

PHP max_upload_size

Backing up MySQL via SSH.

I'm not a people person but I do have a public method.