# Reserved usernames users: root: username: root uid: 0 gid: 0 description: "System superuser" daemon: username: daemon description: "Daemon processes owner" bin: username: bin description: "Owner of essential binaries" sys: username: sys description: "System files owner" sync: username: sync description: "Sync user for filesystem synchronization" games: username: games description: "Games and educational software owner" man: username: man description: "Manual pages viewer" lp: username: lp description: "Printer spooler" mail: username: mail description: "Mail system" news: username: news description: "Network news system" uucp: username: uucp description: "UUCP system" proxy: username: proxy description: "Proxy user" www-data: username: www-data description: "Web server user" backup: username: backup description: "Backup operator" list: username: list description: "Mailing list manager" irc: username: irc description: "IRC services user" gnats: username: gnats description: "GNATS bug-reporting system" nobody: username: nobody description: "Unprivileged user" messagebus: username: messagebus description: "D-Bus message bus system" sshd: username: sshd description: "SSH daemon" rpc: username: rpc description: "Rpcbind daemon" ftp: username: ftp description: "FTP server" postfix: username: postfix description: "Postfix mail transfer agent" mysql: username: mysql description: "MySQL database server" mongodb: username: mongodb description: "MongoDB database server" admin: username: admin description: "Generic reserved username" administrator: username: administrator user: username: user description: "Generic reserved username" test: username: test description: "Generic reserved username" guest: username: guest description: "Generic reserved username" demo: username: demo description: "Generic reserved username" info: username: info description: "Generic reserved username" support: username: support description: "Generic reserved username" helpdesk: username: helpdesk description: "Generic reserved username" operator: username: operator description: "Generic reserved username" staff: username: staff description: "Generic reserved username" smtp: username: smtp description: "Generic reserved username" imap: username: imap description: "Generic reserved username" pop: username: pop description: "Generic reserved username" webmaster: username: webmaster description: "Generic reserved username" mailman: username: mailman description: "Generic reserved username"