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Top Forums UNIX for Advanced & Expert Users DNS issue still not looking in files Post 36756 by RTM on Wednesday 4th of June 2003 09:37:36 AM
Old 06-04-2003
Please put the information on what you are trying to solve such as version and info on the dataprotector (I checked Sunsolve and they had no documents containing that).

Your original message did not mention dataprotector -
Quote:
anyone ever seen this problem

with /etc/nsswitch.conf forcing the system to look in files then dns
but the system ignores the files and goes off check the dn servers
The answer for that is yes, some application software actually does not look at nsswitch.conf or /etc/hosts without setting it up to look at them (example: Sendmail - uses DNS only unless you set it up differently).

Your test that Optimus_P asked you to try was sucessful as far as I can see. When you had only dns in the nsswitch.conf your system did not know what testftp was (ping to a IP address will always work since it's not using /etc/hosts or DNS to find out an IP for a hostname). When you put files and DNS in nsswitch.conf, then the ping to testftp worked (it found it in /etc/hosts).

And nslookup will not look at nsswitch.conf as it is a DNS only query tool to check that DNS is working
 

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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)
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