In computing, Trustix Secure Linux is a Linux distribution intended for use on servers and focused on security and stability. It is "hardened", meaning that non-essential services and binaries are not installed, while UNIX staples like Sendmail are replaced by programs with better security reputations like Postfix.

Trustix takes a less radical approach to hardening than many other secure distributions (e.g. Security Enhanced Linux); the Linux kernel and security model remains unchanged and the distribution itself is based on Red Hat Linux.

Trustix was originally produced by Trustix AS. The company was established late in 1997 by entrepreneurs from USA and Norway. The company went bankrupt in 2003. The original Trustix team continued to maintain the software under the new name "Tawie Server Linux". The assets of Trustix were then bought by Comodo Group in November 2003. Comodo has restored the Trustix brand, rehired the programmers, and restored its product line.

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