Slackware was one of the earliest operating systems to be built on top of the Linux kernel and is the oldest currently being maintained.  Slackware is an advanced Linux operating system, designed with the twin goals of ease of use and stability as top priorities. Including the latest popular software while retaining a sense of tradition, providing simplicity and ease of use alongside flexibility and power, Slackware brings the best of all worlds to the table.

Slackware is a good choice for veteran Linux users.