getent

GETENT(1)                        User Commands                       GETENT(1)



NAME
       getent - get entries from Name Service Switch libraries

SYNOPSIS
       getent [option]... database key...

DESCRIPTION
       The getent command displays entries from databases supported by the
       Name Service Switch libraries, which are configured in
       /etc/nsswitch.conf.  If one or more key arguments are provided, then
       only the entries that match the supplied keys will be displayed.
       Otherwise, if no key is provided, all entries will be displayed (unless
       the database does not support enumeration).

       The database may be any of those supported by the GNU C Library, listed
       below:

          ahosts    When no key is provided, use sethostent(3), gethostent(3),
                    and endhostent(3) to enumerate the hosts database.  This
                    is identical to using hosts.  When one or more key
                    arguments are provided, pass each key in succession to
                    getaddrinfo(3) with the address family AF_UNSPEC,
                    enumerating each socket address structure returned.

          ahostsv4  Same as ahosts, but use the address family AF_INET.

          ahostsv6  Same as ahosts, but use the address family AF_INET6.  The
                    call to getaddrinfo(3) in this case includes the
                    AI_V4MAPPED flag.

          aliases   When no key is provided, use setaliasent(3),
                    getaliasent(3), and endaliasent(3) to enumerate the
                    aliases database.  When one or more key arguments are
                    provided, pass each key in succession to getaliasbyname(3)
                    and display the result.

          ethers    When one or more key arguments are provided, pass each key
                    in succession to ether_aton(3) and ether_hostton(3) until
                    a result is obtained, and display the result.  Enumeration
                    is not supported on ethers, so a key must be provided.

          group     When no key is provided, use setgrent(3), getgrent(3), and
                    endgrent(3) to enumerate the group database.  When one or
                    more key arguments are provided, pass each numeric key to
                    getgrgid(3) and each nonnumeric key to getgrnam(3) and
                    display the result.

          gshadow   When no key is provided, use setsgent(3), getsgent(3), and
                    endsgent(3) to enumerate the gshadow database.  When one
                    or more key arguments are provided, pass each key in
                    succession to getsgnam(3) and display the result.

          hosts     When no key is provided, use sethostent(3), gethostent(3),
                    and endhostent(3) to enumerate the hosts database.  When
                    one or more key arguments are provided, pass each key to
                    gethostbyaddr(3) or gethostbyname2(3), depending on
                    whether a call to inet_pton(3) indicates that the key is
                    an IPv6 or IPv4 address or not, and display the result.

          initgroups
                    When one or more key arguments are provided, pass each key
                    in succession to getgrouplist(3) and display the result.
                    Enumeration is not supported on initgroups, so a key must
                    be provided.

          netgroup  When one key is provided, pass the key to setnetgrent(3)
                    and, using getnetgrent(3) display the resulting string
                    triple (hostname, username, domainname).  Alternatively,
                    three keys may be provided, which are interpreted as the
                    hostname, username and domainname to match to a netgroup
                    name via innetgr(3).  Enumeration is not supported on
                    netgroup, so either one or three keys must be provided.

          networks  When no key is provided, use setnetent(3), getnetent(3),
                    and endnetent(3) to enumerate the networks database.  When
                    one or more key arguments are provided, pass each numeric
                    key to getnetbyaddr(3) and each nonnumeric key to
                    getnetbyname(3) and display the result.

          passwd    When no key is provided, use setpwent(3), getpwent(3), and
                    endpwent(3) to enumerate the passwd database.  When one or
                    more key arguments are provided, pass each numeric key to
                    getpwuid(3) and each nonnumeric key to getpwnam(3) and
                    display the result.

          protocols When no key is provided, use setprotoent(3),
                    getprotoent(3), and endprotoent(3) to enumerate the
                    protocols database.  When one or more key arguments are
                    provided, pass each numeric key to getprotobynumber(3) and
                    each nonnumeric key to getprotobyname(3) and display the
                    result.

          rpc       When no key is provided, use setrpcent(3), getrpcent(3),
                    and endrpcent(3) to enumerate the rpc database.  When one
                    or more key arguments are provided, pass each numeric key
                    to getrpcbynumber(3) and each nonnumeric key to
                    getrpcbyname(3) and display the result.

          services  When no key is provided, use setservent(3), getservent(3),
                    and endservent(3) to enumerate the services database.
                    When one or more key arguments are provided, pass each
                    numeric key to getservbynumber(3) and each nonnumeric key
                    to getservbyname(3) and display the result.

          shadow    When no key is provided, use setspent(3), getspent(3), and
                    endspent(3) to enumerate the shadow database.  When one or
                    more key arguments are provided, pass each key in
                    succession to getspnam(3) and display the result.

OPTIONS
       -s service, --service service
              Override all databases with the specified service.  (Since glibc
              2.2.5.)

       -s database:service, --service database:service
              Override only specified databases with the specified service.
              The option may be used multiple times, but only the last service
              for each database will be used.  (Since glibc 2.4.)

       -i, --no-idn
              Disables IDN encoding in lookups for ahosts/getaddrinfo(3)
              (Since glibc-2.13.)

       -?, --help
              Print a usage summary and exit.

       --usage
              Print a short usage summary and exit.

       -V, --version
              Print the version number, license, and disclaimer of warranty
              for getent.

EXIT STATUS
       One of the following exit values can be returned by getent:

          0         Command completed successfully.

          1         Missing arguments, or database unknown.

          2         One or more supplied key could not be found in the
                    database.

          3         Enumeration not supported on this database.

SEE ALSO
       nsswitch.conf(5)

COLOPHON
       This page is part of release 5.02 of the Linux man-pages project.  A
       description of the project, information about reporting bugs, and the
       latest version of this page, can be found at
       https://www.kernel.org/doc/man-pages/.



Linux                             2019-03-06                         GETENT(1)