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NAME | SYNOPSIS | DESCRIPTION | EXAMPLE | SEE ALSO | COLOPHON |
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NSS-SYSTEMD(8) nss-systemd NSS-SYSTEMD(8)
nss-systemd, libnss_systemd.so.2 - Provide UNIX user and group name
resolution for dynamic users and groups.
libnss_systemd.so.2
nss-systemd is a plug-in module for the GNU Name Service Switch (NSS)
functionality of the GNU C Library (glibc), providing UNIX user and
group name resolution for dynamic users and groups allocated through
the DynamicUser= option in systemd unit files. See systemd.exec(5)
for details on this option.
This module also ensures that the root and nobody users and groups
(i.e. the users/groups with the UIDs/GIDs 0 and 65534) remain
resolvable at all times, even if they aren't listed in /etc/passwd or
/etc/group, or if these files are missing.
To activate the NSS module, add "systemd" to the lines starting with
"passwd:" and "group:" in /etc/nsswitch.conf.
It is recommended to place "systemd" after the "files" or "compat"
entry of the /etc/nsswitch.conf lines so that /etc/passwd and
/etc/group based mappings take precedence.
Here is an example /etc/nsswitch.conf file that enables nss-systemd
correctly:
passwd: compat mymachines systemd
group: compat mymachines systemd
shadow: compat
hosts: files mymachines resolve [!UNAVAIL=return] dns myhostname
networks: files
protocols: db files
services: db files
ethers: db files
rpc: db files
netgroup: nis
systemd(1), systemd.exec(5), nss-resolve(8), nss-myhostname(8),
nss-mymachines(8), nsswitch.conf(5), getent(1)
This page is part of the systemd (systemd system and service manager)
project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have a bug
report for this manual page, see
⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩. This
page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2018-02-02. (At that
time, the date of the most recent commit that was found in the repos‐
itory was 2018-02-02.) If you discover any rendering problems in
this HTML version of the page, or you believe there is a better or
more up-to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not part
of the original manual page), send a mail to man-pages@man7.org
systemd 234 NSS-SYSTEMD(8)
Pages that refer to this page: systemd.exec(5), systemd.directives(7), systemd.index(7), nss-myhostname(8), nss-mymachines(8), nss-resolve(8)
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HTML rendering created 2018-02-02 by Michael Kerrisk, author of The Linux Programming Interface, maintainer of the Linux man-pages project. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH.
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