Alfonso Siciliano<p>nsysctl 2.2 is out!</p><p>New features and improvements:<br><a href="https://alfonsosiciliano.gitlab.io/posts/2025-06-28-nsysctl-2-2.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">alfonsosiciliano.gitlab.io/pos</span><span class="invisible">ts/2025-06-28-nsysctl-2-2.html</span></a></p><p>Manual and tutorial already updated!<br><a href="https://mastodon.bsd.cafe/tags/documentation" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>documentation</span></a> <a href="https://mastodon.bsd.cafe/tags/docs" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>docs</span></a> <a href="https://mastodon.bsd.cafe/tags/manual" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>manual</span></a> <a href="https://mastodon.bsd.cafe/tags/tutorial" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tutorial</span></a></p><p>Port update in progress sysutils/nsysctl<br><a href="https://mastodon.bsd.cafe/tags/FreeBSD" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FreeBSD</span></a> <a href="https://mastodon.bsd.cafe/tags/UNIX" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>UNIX</span></a> <a href="https://mastodon.bsd.cafe/tags/sysadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sysadmin</span></a> <a href="https://mastodon.bsd.cafe/tags/sysctl" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sysctl</span></a> <a href="https://mastodon.bsd.cafe/tags/HappyHacking" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>HappyHacking</span></a> <a href="https://mastodon.bsd.cafe/tags/runbsd" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>runbsd</span></a> :runbsdBg: <a href="https://mastodon.bsd.cafe/tags/OpenSource" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>OpenSource</span></a></p>
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#sysctl
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Alfonso Siciliano<p>🖥️ My ultra-budget server powering <a href="http://websysctl.alfonsosiciliano.net" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">http://</span><span class="">websysctl.alfonsosiciliano.net</span><span class="invisible"></span></a> has been running smoothly for the past 2 months. So far, so good!</p><p>📈 <a href="https://mastodon.bsd.cafe/tags/Crawlers" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Crawlers</span></a> hit tens of thousands of sysctl parameter pages daily. That's fine, since robots.txt allows it. But why keep requesting non-existent pages as if the site were built with WordPress 😤 ? Fortunately, the stack (<a href="https://mastodon.bsd.cafe/tags/FreeBSD" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FreeBSD</span></a> :freebsd: + <a href="https://mastodon.bsd.cafe/tags/OpenResty" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>OpenResty</span></a> 🌐 + <a href="https://mastodon.bsd.cafe/tags/Lapis" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Lapis</span></a> ✏️ + a custom-built <a href="https://mastodon.bsd.cafe/tags/database" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>database</span></a> 📦 ) stays well within the limited resources of my $5/month cloud server.</p><p>The code might soon be <a href="https://mastodon.bsd.cafe/tags/OpenSource" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>OpenSource</span></a> stay tuned!</p><p><a href="https://mastodon.bsd.cafe/tags/UNIX" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>UNIX</span></a> <a href="https://mastodon.bsd.cafe/tags/sysctl" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sysctl</span></a> <a href="https://mastodon.bsd.cafe/tags/WebDev" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>WebDev</span></a> <a href="https://mastodon.bsd.cafe/tags/WebServer" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>WebServer</span></a> <a href="https://mastodon.bsd.cafe/tags/ThePowerToServe" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ThePowerToServe</span></a> <a href="https://mastodon.bsd.cafe/tags/coding" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>coding</span></a> <a href="https://mastodon.bsd.cafe/tags/Lua" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Lua</span></a> <a href="https://mastodon.bsd.cafe/tags/kernel" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>kernel</span></a></p>
Alfonso Siciliano<p>sysctlview <a href="https://www.freshports.org/deskutils/sysctlview/" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">freshports.org/deskutils/sysct</span><span class="invisible">lview/</span></a> is a GUI utility for sysctl on <a href="https://mastodon.bsd.cafe/tags/FreeBSD" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FreeBSD</span></a>. :freebsd: <br>It's probably my first <a href="https://mastodon.bsd.cafe/tags/opensource" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>opensource</span></a> project 👨💻 , it's still in the Ports Collection 📦 and runs fine, but it hasn't been updated in years.</p><p>Maybe it's finally time to brush up on <a href="https://mastodon.bsd.cafe/tags/C" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>C</span></a>++ and give sysctlview a proper rewrite.<br>The original version uses <a href="https://mastodon.bsd.cafe/tags/gtkmm" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>gtkmm</span></a> (<a href="https://mastodon.bsd.cafe/tags/GTK" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>GTK</span></a> for C++), but a few years ago I ran a poll and most people preferred <a href="https://mastodon.bsd.cafe/tags/qt" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>qt</span></a> <br>So maybe a QTsysctlview is on the horizon? 👀</p><p><a href="https://mastodon.bsd.cafe/tags/staytuned" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>staytuned</span></a> <a href="https://mastodon.bsd.cafe/tags/sysctl" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sysctl</span></a> <a href="https://mastodon.bsd.cafe/tags/FreeBSDDev" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FreeBSDDev</span></a> <a href="https://mastodon.bsd.cafe/tags/coding" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>coding</span></a> <a href="https://mastodon.bsd.cafe/tags/kernel" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>kernel</span></a> <a href="https://mastodon.bsd.cafe/tags/Desktop" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Desktop</span></a> <a href="https://mastodon.bsd.cafe/tags/Laptop" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Laptop</span></a></p>
Alfonso Siciliano<p>SysctlTUI is Out!</p><p>The sysctl() system call can get or set the state of the system, the <a href="https://mastodon.bsd.cafe/tags/FreeBSD" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FreeBSD</span></a> kernel exposes the parameters for sysctl() as objects of a Management information Base (MIB).</p><p>sysctltui is a Text User Interface <a href="https://mastodon.bsd.cafe/tags/sysctl" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sysctl</span></a> <a href="https://mastodon.bsd.cafe/tags/MIB" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>MIB</span></a> explorer. It allow to view a parameter’s properties and get or set its value. </p><p>Link: <a href="https://alfonsosiciliano.gitlab.io/posts/2025-05-29-sysctltui.html" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">alfonsosiciliano.gitlab.io/pos</span><span class="invisible">ts/2025-05-29-sysctltui.html</span></a></p><p><a href="https://mastodon.bsd.cafe/tags/UNIX" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>UNIX</span></a> <a href="https://mastodon.bsd.cafe/tags/kernel" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>kernel</span></a> <a href="https://mastodon.bsd.cafe/tags/C" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>C</span></a> <a href="https://mastodon.bsd.cafe/tags/terminal" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>terminal</span></a> <a href="https://mastodon.bsd.cafe/tags/opensource" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>opensource</span></a></p>
TomAoki<p><span class="h-card" translate="no"><a href="https://social.lol/@robn" class="u-url mention" rel="nofollow noopener" target="_blank">@<span>robn</span></a></span> <br>I don't have GitHub account, so replying here.</p><p>Not sure it's trivial enough or not, but wouldn't it nice if this deletions are done in 3 steps, like below in single commit per step?<br> Step1: Implement new SYSCTL macro to create alias of<br> any sysctl/tunable node (i.e., SYSCTL_ALIAS).<br> Step2: Use it for to-be-removed nodes.<br> Step3: Actually remove now-actually-alias old nodes.</p><p>This kind of renaming could happen in the future. So having clear way like<br> Step1: Add new node as usual and make existing<br> to-be-deleted ones alias of the new one.<br> Step2: In next or later *.0-Release, search and delete aliases<br> to avoid POLA violations within single stable branch.</p><p>This way, the 2nd step would become trivial (look for SYSCTL_ALIAS).</p><p><a href="https://mastodon.bsd.cafe/tags/FreeBSD" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FreeBSD</span></a> <a href="https://mastodon.bsd.cafe/tags/OpenZFS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>OpenZFS</span></a> <a href="https://mastodon.bsd.cafe/tags/SYSCTL" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>SYSCTL</span></a></p>
Alfonso Siciliano<p>I don't know why, but <a href="https://mastodon.bsd.cafe/tags/FreeBSD" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>FreeBSD</span></a> users love TUIs. I've received several requests for a <a href="https://mastodon.bsd.cafe/tags/TUI" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>TUI</span></a> version of <a href="https://mastodon.bsd.cafe/tags/sysctl" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sysctl</span></a>. The project is in progress, ideas and suggestions are welcome!</p><p><a href="https://mastodon.bsd.cafe/tags/coding" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>coding</span></a> <a href="https://mastodon.bsd.cafe/tags/kernel" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>kernel</span></a> <a href="https://mastodon.bsd.cafe/tags/UNIX" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>UNIX</span></a> <a href="https://mastodon.bsd.cafe/tags/terminal" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>terminal</span></a> <a href="https://mastodon.bsd.cafe/tags/opensource" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>opensource</span></a></p>
Peter N. M. Hansteen<p>New sysctl(8) -f option supports reading entire settings file in one go <a href="https://www.undeadly.org/cgi?action=article;sid=20250408120131" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">undeadly.org/cgi?action=articl</span><span class="invisible">e;sid=20250408120131</span></a><br><a href="https://mastodon.social/tags/openbsd" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>openbsd</span></a> <a href="https://mastodon.social/tags/sysctl" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sysctl</span></a> <a href="https://mastodon.social/tags/sysadmin" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sysadmin</span></a> <a href="https://mastodon.social/tags/devops" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>devops</span></a> <a href="https://mastodon.social/tags/development" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>development</span></a> <a href="https://mastodon.social/tags/security" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>security</span></a> <a href="https://mastodon.social/tags/freesoftware" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>freesoftware</span></a> <a href="https://mastodon.social/tags/libresoftware" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>libresoftware</span></a></p>
Axel ⌨🐧🐪🚴😷 | R.I.P Natenom<p><a href="https://chaos.social/tags/TIL" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>TIL</span></a>: <a href="https://chaos.social/tags/Firefox" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Firefox</span></a> on <a href="https://chaos.social/tags/Linux" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Linux</span></a> works fine with</p><p>user.max_user_namespaces = 0</p><p>as well as with</p><p>user.max_user_namespaces = 100</p><p>but not with</p><p>user.max_user_namespaces = 1</p><p>which seems to have been set by default on my <a href="https://chaos.social/tags/DebianUnstable" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>DebianUnstable</span></a> since last week or so.</p><p>Also Firefox' error messages on the shell were I started it weren't really that helpful:</p><p>Failed to launch tab subprocess @fork (Error:28): file ipc/[…]<br>fork() failed: No space left on device: file ipc/[…]</p><p><a href="https://chaos.social/tags/UserNS" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>UserNS</span></a> <a href="https://chaos.social/tags/UserNamespace" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>UserNamespace</span></a> <a href="https://chaos.social/tags/sysctl" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sysctl</span></a></p>
Peter N. M. Hansteen<p>-current now has more flexible performance policy <a href="https://www.undeadly.org/cgi?action=article;sid=20241129093132" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">undeadly.org/cgi?action=articl</span><span class="invisible">e;sid=20241129093132</span></a> <a href="https://mastodon.social/tags/openbsd" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>openbsd</span></a> <a href="https://mastodon.social/tags/perfpolicy" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>perfpolicy</span></a> <a href="https://mastodon.social/tags/sysctl" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sysctl</span></a> <a href="https://mastodon.social/tags/performance" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>performance</span></a></p>
Peter N. M. Hansteen<p>Demise of Nagle's algorithm (RFC 896 - Congestion Control) predicted via sysctl <a href="https://www.undeadly.org/cgi?action=article;sid=20240514075024" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">undeadly.org/cgi?action=articl</span><span class="invisible">e;sid=20240514075024</span></a> <a href="https://mastodon.social/tags/openbsd" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>openbsd</span></a> <a href="https://mastodon.social/tags/networking" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>networking</span></a> <a href="https://mastodon.social/tags/tcp" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>tcp</span></a> <a href="https://mastodon.social/tags/congestion" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>congestion</span></a> <a href="https://mastodon.social/tags/nagle" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nagle</span></a> <a href="https://mastodon.social/tags/nodelay" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>nodelay</span></a> <a href="https://mastodon.social/tags/sysctl" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>sysctl</span></a></p>
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