GETENT
Section: User Commands (1)
Updated: 2020-12-21
Page Index
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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