RCS archive in /etc


 
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Old 11-16-2008
Well it is not a bad idea. I have worked for one place that did that. It wasn't my idea but I did not object. The reason it is done is to put critical files like nsswitch.conf, hosts, and so on under RCS control. Previous versions are then available to see how stuff changed over the years. And recent changes will be checked in by the person who made the change. That way you can ask why a change was made.
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NSS-SYSTEMD(8)							    nss-systemd 						    NSS-SYSTEMD(8)

NAME
nss-systemd, libnss_systemd.so.2 - Provide UNIX user and group name resolution for dynamic users and groups. SYNOPSIS
libnss_systemd.so.2 DESCRIPTION
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. EXAMPLE
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 SEE ALSO
systemd(1), systemd.exec(5), nss-resolve(8), nss-myhostname(8), nss-mymachines(8), nsswitch.conf(5), getent(1) systemd 237 NSS-SYSTEMD(8)