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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 li‐
       braries, which are configured in /etc/nsswitch.conf.  If one or more key arguments  are  pro‐
       vided,  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  enu‐
       meration).

       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 re‐
                    turned.

          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  enu‐
                    merate  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  dis‐
                    play the result.

          gshadow   When  no  key is provided, use setsgent(3), getsgent(3), and endsgent(3) to enu‐
                    merate 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 get‐‐
                    grouplist(3) and display the result.  Enumeration  is  not  supported  on  init‐‐
                    groups, so a key must be provided.

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

          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  getnetby‐‐
                    name(3) and display the result.

          passwd    When  no  key is provided, use setpwent(3), getpwent(3), and endpwent(3) to enu‐
                    merate 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 dis‐
                    play 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 pro‐
                    vided, 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  get‐‐
                    servbyname(3) and display the result.

          shadow    When  no  key is provided, use setspent(3), getspent(3), and endspent(3) to enu‐
                    merate 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  5.10 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                                        2020-12-21                                    GETENT(1)