From Fedora Project Wiki
Registered users/groups
Please see the UserCreation page for information about how to use this table.
| user-/groupname | uid/gid | Purpose | Packages |
| ip-sentinel | 1 | non-root execution of daemon | ip-sentinel |
| socklog | 2 | socklog /dev/log listener | socklog-setup |
| svlog | 3 | socklog backend daemons | socklog-setup |
| clamav | 4 | user which updates clamav database | clamav-data |
| clamilt | 5 | the user under which the clamav milter is running | clamav-milter |
| pymilter | 6 | the user under which the python milter is running | milter |
| grmilter | 7 | the user for the greylist-milter daemon | milter-greylist |
| defang | 8 | the user for the mimedefang daemon | mimedefang |
| twiki | 9 | the user who is running TWiki | twiki |
| amavis | 10 | the user who is running the amavisd-new mail filter daemon | amavisd-new |
| dhcp-fwd | 11 | the user who is running the dhcp-forwarder daemon | dhcp-forwarder |
| kismet | 12 | the user who is running the kismet server | kismet |
| tinyerp | 13 | the user who is running the tinyerp server | tinyerp |
| ircd | 14 | the user who is running the ircd-hybrid server | ircd-hybrid |
| tclhttpd | 16 | the user under which the tclhttpd application server runs | tclhttpd |
| distcc | 17 | the user under which the distcc daemon runs | distcc |
| munin | 18 | the user who runs the munin collection process | munin |
| toranon | 19 | the user under which the tor daemon runs | tor |
| fnord | 20 | the user for the fnord http server | fnord |
| ushare | 21 | the user for ushare a UPnP A/V Media Server | ushare |
| postgrey | 22 | the user who is running the postgrey policy server | postgrey |
| moomps | 23 | the user under which the moomps daemon runs | moomps |
| hacluster | 24 | the user under which the heartbeat daemon runs | heartbeat |
| xpilot | 25 | the user under which the xpilot-ng server daemon runs | xpilot-ng |
| sqlgrey | 26 | the user which runs the sqlgrey service | sqlgrey |
| ejabberd | 27 | the user that ejabberd runs as | ejabberd |
| builder | 28 | the user for the Test-AutoBuild builder | perl-Test-AutoBuild |
| zaptel | 29 | the user who owns the zaptel kernel devices | zaptel |
| openpbx | 30 | the user as which OpenPBX runs. | openpbx |
| asterisk | 31 | the user as which Asterisk runs. | asterisk |
| gnunet | 32 | the user as which the gnunet daemon runs. | gnunet |
| bacula | 33 | the user running the bacula backup daemon | bacula |
| jackuser | 34 | the group for the jack audio server real-time mode | jack-audio-connection-kit |
| vboxusers | 35 | the group of people that may run virtualbox | virtualbox |
| ngircd | 36 | the user running the ngirc daemon | ngircd |
| openxpki | 37 | the user being used by the OpenXPKI daemon | OpenXPKI |
| dbmail | 38 | dbmail daemons | dbmail |
| tofmipd | 39 | tofmipd daemon | tmda |
| flow-tools | 40 | flow-capture daemon | flow-tools |
| roundup | 41 | roundup-server process | roundup |
| canna | 42 | cannaserver daemon | Canna |
| sgeadmin | 43 | Sun Grid Engine | gridengine |
| icecream | 44 | Icecream distributed compiler | icecream |
| jive | 45 | Openfire XMPP server user UNDER REVIEW | openfire |
| dahdi | 46 | DAHDI Telephony | dahdi-tools |
| ladvd | 47 | CDP/LLDP sender for unix | ladvd |
| nm-openconnect | 48 | OpenConnect dæmon under NetworkManager | nm-openconnect |