linux:commands:network:dns [ともやん・どっと・ねっと]

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====== 名前解決 (dig, nslookup) ======

===== Avahi =====
Fedore での ''/etc/nsswitch.conf'' の設定内容...🤔\\
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<font color="#0087FF"><b>$</b></font> <font color="#26A269">bat</font> <font color="#A347BA">-p</font> <font color="#A347BA">-l</font> conf <u style="text-decoration-style:solid">/etc/nsswitch.conf</u>
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<font color="#75715E"># Generated by authselect</font>
<font color="#75715E"># Do not modify this file manually, use authselect instead. Any user changes will be overwritten.</font>
<font color="#75715E"># You can stop authselect from managing your configuration by calling &apos;authselect opt-out&apos;.</font>
<font color="#75715E"># See authselect(8) for more details.</font>

<font color="#75715E"># In order of likelihood of use to accelerate lookup.</font>
<font color="#F8F8F2">passwd:     </font><font color="#F92672">files</font><font color="#FFFFFF"> sss systemd</font>
<font color="#F8F8F2">shadow:     </font><font color="#F92672">files</font>
<font color="#F8F8F2">group:      </font><font color="#F92672">files</font><font color="#FFFFFF"> [SUCCESS=merge] sss [SUCCESS=merge] systemd</font>
<font color="#F8F8F2">hosts:      </font><font color="#F92672">files</font><font color="#FFFFFF"> myhostname mdns4_minimal [NOTFOUND=return] resolve [!UNAVAIL=return] dns</font>
<font color="#F8F8F2">services:   </font><font color="#F92672">files</font><font color="#FFFFFF"> sss</font>
<font color="#F8F8F2">netgroup:   </font><font color="#F92672">files</font><font color="#FFFFFF"> sss</font>
<font color="#F8F8F2">automount:  </font><font color="#F92672">files</font><font color="#FFFFFF"> sss</font>

<font color="#F8F8F2">aliases:    </font><font color="#F92672">files</font>
<font color="#F8F8F2">ethers:     </font><font color="#F92672">files</font>
<font color="#F8F8F2">gshadow:    </font><font color="#F92672">files</font>
<font color="#F8F8F2">networks:   </font><font color="#F92672">files</font><font color="#FFFFFF"> dns</font>
<font color="#F8F8F2">protocols:  </font><font color="#F92672">files</font>
<font color="#F8F8F2">publickey:  </font><font color="#F92672">files</font>
<font color="#F8F8F2">rpc:        </font><font color="#F92672">files</font>
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===== 参考文献 =====
[[arc>Dnsmasq|dnsmasq - ArchWiki]]\\
[[ow>docs/guide-user/base-system/dhcp.dnsmasq|[OpenWrt Wiki] Dnsmasq DHCP server]]\\
[[arc>Avahi|Avahi - ArchWiki]]\\
[[arc>Systemd-networkd|systemd-networkd - ArchWiki]]\\
[[arc>Systemd-resolved|systemd-resolved - ArchWiki]]\\
[[git>systemd/systemd/issues/9473|[networkd] description of UseDNS= / UseDomains= · Issue #9473 · systemd/systemd]]\\
[[https://discussion.fedoraproject.org/t/placement-of-myhostname-inside-etc-nsswitch-conf/71315|Placement of "myhostname" inside "/etc/nsswitch.conf" - Fedora Discussion]]\\

[[https://www.cyberciti.biz/faq/linux-unix-dig-command-examples-usage-syntax/|Linux and Unix dig Command Examples - nixCraft]]\\
[[https://phoenixnap.com/kb/nslookup-command|How to Use the nslookup Command {10 Examples}]]\\