Packages with the uuid use flag

app-admin / rsyslog : An enhanced multi-threaded syslogd with database support and more

  • Include UUIDs in messages (requires sys-apps/util-linux)

app-arch / dump : Dump/restore ext2fs backup utilities

  • Enable UUID support

app-forensics / libewf : Implementation of the EWF (SMART and EnCase) image format

  • Enable UUID support in the ewftools

dev-db / postgresql : PostgreSQL RDBMS

  • Enable server side UUID generation (via dev-libs/ossp-uuid).

dev-lang / swi-prolog : versatile implementation of the Prolog programming language

  • Use ossp-uuid for UUID pack

net-fs / nfs-utils : NFS client and server daemons

  • Support UUID lookups in rpc.mountd

net-misc / wget : Network utility to retrieve files from the WWW

  • Generate UUIDs for the WARC (Web ARChive file format) using libuuid; otherwise use a simple RNG (random number generator)

sys-apps / nvme-cli : NVM-Express user space tooling for Linux

  • UUID support

x11-libs / libSM : X.Org Session Management library

  • Use UUID for session identification instead of IP address and system time.