A replacement for the Unix crypt, using several block algorithms in several modes like cbc, and cfb.

Strong cryptographic software, libraries, and information about cryptography, data security, and privacy.

Execute root-level commands and shell scripts without having to actually login as root. Control which users can log in and under which circumstances.

lsof is a tool for examining I/O channels open on your Unix system. These can include files, FIFOs and network sockets. This information can be extremely useful for security and a variety of other purposes. Works on most Unix-like systems.

Run selected commands as root, with the users' own password. Allows the administrator to grant limited root privileges to a subset of users, without giving out the root password.

A pair of Perl scripts that provide an audited root shell using sudo and script(1). Tarballs, RPM's and individual components.

SUS is a utility to allow a user (typically a system administrator) to run a single command as the super user.

Daemon implementing IDENT protocol, it can be used to identify the user who initiated a TCP/IP connection