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It was someone from ACM again that put me onto TTL. When your lab has NIS it is master for sysctl. I do not recall if he was LBL or LLNL.</div>
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That is NIS admin can set TTL for entire domain added into NIS.</div>
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bing - <span style="font-family: -apple-system, Roboto, SegoeUI, "Segoe UI", "Helvetica Neue", Helvetica, "Microsoft YaHei", "Meiryo UI", Meiryo, "Arial Unicode MS", sans-serif; font-size: 14px; display: inline !important; color: rgb(17, 17, 17); background-color: rgb(255, 255, 255);" class="ContentPasted1">Searching
for:<span class="ContentPasted1"> </span></span><code style="user-select: text; word-break: break-word; font-size: 14px; color: rgb(17, 17, 17); background-color: rgb(255, 255, 255);" class="ContentPasted1">ip_default_ttl to sys/proc</code></div>
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sysctl
<pre style="margin: 0px 0px 4px; padding: 10px; box-sizing: border-box; border: 1px solid var(--cib-color-stroke-neutral-primary); color: rgb(17, 17, 17);"><code class="language-bash ContentPasted0">-w net.ipv4.ip_default_ttl=<value></code></pre>
<pre style="margin: 0px 0px 4px; padding: 10px; box-sizing: border-box; border: 1px solid var(--cib-color-stroke-neutral-primary); color: rgb(17, 17, 17);"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(17, 17, 17);">or</span><br></pre>
<pre style="margin: 0px 0px 4px; padding: 10px; box-sizing: border-box; border: 1px solid var(--cib-color-stroke-neutral-primary); color: rgb(17, 17, 17);"><a href="https://linux.die.net/man/8/sysctl" id="OWA3620f59e-2f59-1973-7c74-5da687df8e8f" class="OWAAutoLink ContentPasted2">sysctl(8) - Linux man page (die.net)</a><br></pre>
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<a target="_blank" id="LPUrlAnchor258669" href="https://linux.die.net/man/8/sysctl" style="text-decoration: none;">sysctl(8) - Linux man page</a></div>
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sysctl is used to modify kernel parameters at runtime. The parameters available are those listed under /proc/sys/. Procfs is required for sysctl(8) support ...</div>
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linux.die.net</div>
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<pre style="margin: 0px 0px 4px; padding: 10px; box-sizing: border-box; border: 1px solid var(--cib-color-stroke-neutral-primary); color: rgb(17, 17, 17);">your shell on unix variant</pre>
<pre style="margin: 0px 0px 4px; padding: 10px; box-sizing: border-box; border: 1px solid var(--cib-color-stroke-neutral-primary); color: rgb(17, 17, 17);">so value is anything</pre>
<pre style="margin: 0px 0px 4px; padding: 10px; box-sizing: border-box; border: 1px solid var(--cib-color-stroke-neutral-primary); color: rgb(17, 17, 17);">so sysctrl must check args</pre>
<pre style="margin: 0px 0px 4px; padding: 10px; box-sizing: border-box; border: 1px solid var(--cib-color-stroke-neutral-primary); color: rgb(17, 17, 17);">or when reboot i guess it goes back to default it could boot with</pre>
<pre style="margin: 0px 0px 4px; padding: 10px; box-sizing: border-box; border: 1px solid var(--cib-color-stroke-neutral-primary); color: rgb(17, 17, 17);">or NIS is master</pre>
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