.\" Copyright (c) 2011, Mark R. Bannister .\" Copyright (c) 2015, Robin H. Johnson .\" .\" %%%LICENSE_START(GPLv2+_DOC_FULL) .\" This is free documentation; you can redistribute it and/or .\" modify it under the terms of the GNU General Public License as .\" published by the Free Software Foundation; either version 2 of .\" the License, or (at your option) any later version. .\" .\" The GNU General Public License's references to "object code" .\" and "executables" are to be interpreted as the output of any .\" document formatting or typesetting system, including .\" intermediate and printed output. .\" .\" This manual is distributed in the hope that it will be useful, .\" but WITHOUT ANY WARRANTY; without even the implied warranty of .\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the .\" GNU General Public License for more details. .\" .\" You should have received a copy of the GNU General Public .\" License along with this manual; if not, see .\" . .\" %%%LICENSE_END .\" .TH GETENT 1 2015-04-19 "Linux" "User Commands" .SH NAME getent \- get entries from Name Service Switch libraries .SH SYNOPSIS .BR getent\ [\fIoption\fP]...\ \fIdatabase\fP\ \fIkey\fP... .SH DESCRIPTION The .B getent command displays entries from databases supported by the Name Service Switch libraries, which are configured in .IR /etc/nsswitch.conf . If one or more .I key arguments are provided, then only the entries that match the supplied keys will be displayed. Otherwise, if no .I key is provided, all entries will be displayed (unless the database does not support enumeration). .PP The .I database may be any of those supported by the GNU C Library, listed below: .RS 3 .TP 10 .B ahosts When no .I key is provided, use .BR sethostent (3), .BR gethostent (3), and .BR endhostent (3) to enumerate the hosts database. This is identical to using .BR hosts . When one or more .I key arguments are provided, pass each .I key in succession to .BR getaddrinfo (3) with the address family .BR AF_UNSPEC , enumerating each socket address structure returned. .TP .B ahostsv4 Same as .BR ahosts , but use the address family .BR AF_INET . .TP .B ahostsv6 Same as .BR ahosts , but use the address family .BR AF_INET6 . The call to .BR getaddrinfo (3) in this case includes the .B AI_V4MAPPED flag. .TP .B aliases When no .I key is provided, use .BR setaliasent (3), .BR getaliasent (3), and .BR endaliasent (3) to enumerate the aliases database. When one or more .I key arguments are provided, pass each .I key in succession to .BR getaliasbyname (3) and display the result. .TP .B ethers When one or more .I key arguments are provided, pass each .I key in succession to .BR ether_aton (3) and .BR ether_hostton (3) until a result is obtained, and display the result. Enumeration is not supported on .BR ethers , so a .I key must be provided. .TP .B group When no .I key is provided, use .BR setgrent (3), .BR getgrent (3), and .BR endgrent (3) to enumerate the group database. When one or more .I key arguments are provided, pass each numeric .I key to .BR getgrgid (3) and each nonnumeric .I key to .BR getgrnam (3) and display the result. .TP .B gshadow When no .I key is provided, use .BR setsgent (3), .BR getsgent (3), and .BR endsgent (3) to enumerate the gshadow database. When one or more .I key arguments are provided, pass each .I key in succession to .BR getsgnam (3) and display the result. .TP .B hosts When no .I key is provided, use .BR sethostent (3), .BR gethostent (3), and .BR endhostent (3) to enumerate the hosts database. When one or more .I key arguments are provided, pass each .I key to .BR gethostbyaddr (3) or .BR gethostbyname2 (3), depending on whether a call to .BR inet_pton (3) indicates that the .I key is an IPv6 or IPv4 address or not, and display the result. .TP .B initgroups When one or more .I key arguments are provided, pass each .I key in succession to .BR getgrouplist (3) and display the result. Enumeration is not supported on .BR initgroups , so a .I key must be provided. .TP .B netgroup When one .I key is provided, pass the .I key to .BR setnetgrent (3) and, using .BR getnetgrent (3) display the resulting string triple .RI ( hostname ", " username ", " domainname ). Alternatively, three .I keys may be provided, which are interpreted as the .IR hostname , .I username and .I domainname to match to a netgroup name via .BR innetgr (3). Enumeration is not supported on .BR netgroup , so either one or three .I keys must be provided. .TP .B networks When no .I key is provided, use .BR setnetent (3), .BR getnetent (3), and .BR endnetent (3) to enumerate the networks database. When one or more .I key arguments are provided, pass each numeric .I key to .BR getnetbyaddr (3) and each nonnumeric .I key to .BR getnetbyname (3) and display the result. .TP .B passwd When no .I key is provided, use .BR setpwent (3), .BR getpwent (3), and .BR endpwent (3) to enumerate the passwd database. When one or more .I key arguments are provided, pass each numeric .I key to .BR getpwuid (3) and each nonnumeric .I key to .BR getpwnam (3) and display the result. .TP .B protocols When no .I key is provided, use .BR setprotoent (3), .BR getprotoent (3), and .BR endprotoent (3) to enumerate the protocols database. When one or more .I key arguments are provided, pass each numeric .I key to .BR getprotobynumber (3) and each nonnumeric .I key to .BR getprotobyname (3) and display the result. .TP .B rpc When no .I key is provided, use .BR setrpcent (3), .BR getrpcent (3), and .BR endrpcent (3) to enumerate the rpc database. When one or more .I key arguments are provided, pass each numeric .I key to .BR getrpcbynumber (3) and each nonnumeric .I key to .BR getrpcbyname (3) and display the result. .TP .B services When no .I key is provided, use .BR setservent (3), .BR getservent (3), and .BR endservent (3) to enumerate the services database. When one or more .I key arguments are provided, pass each numeric .I key to .BR getservbynumber (3) and each nonnumeric .I key to .BR getservbyname (3) and display the result. .TP .B shadow When no .I key is provided, use .BR setspent (3), .BR getspent (3), and .BR endspent (3) to enumerate the shadow database. When one or more .I key arguments are provided, pass each .I key in succession to .BR getspnam (3) and display the result. .RE .SH OPTIONS .TP .BR \-s\ \fIservice\fP ", " \-\-service\ \fIservice\fP .\" commit 9d0881aa76b399e6a025c5cf44bebe2ae0efa8af (glibc) Override all databases with the specified service. (Since glibc 2.2.5.) .TP .BR \-s\ \fIdatabase\fP:\fIservice\fP ", "\ \-\-service\ \fIdatabase\fP:\fIservice\fP .\" commit b4f6f4be85d32b9c03361c38376e36f08100e3e8 (glibc) 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.) .TP .BR \-i ", " \-\-no\-idn .\" commit a160f8d808cf8020b13bd0ef4a9eaf3c11f964ad (glibc) Disables IDN encoding in lookups for .BR ahosts / getaddrinfo (3) (Since glibc-2.13.) .TP .BR \-? ", " \-\-help Print a usage summary and exit. .TP .B "\-\-usage" Print a short usage summary and exit. .TP .BR \-V ", " \-\-version Print the version number, license, and disclaimer of warranty for .BR getent . .SH EXIT STATUS One of the following exit values can be returned by .BR getent : .RS 3 .TP 10 .B 0 Command completed successfully. .TP .B 1 Missing arguments, or .I database unknown. .TP .B 2 One or more supplied .I key could not be found in the .IR database . .TP .B 3 Enumeration not supported on this .IR database . .RE .SH SEE ALSO .BR nsswitch.conf (5) .SH COLOPHON This page is part of release 4.16 of the Linux .I 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/.