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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

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