n/essentialsoftware: systemd sockets recap

n/essentialsoftware.md

@@ -51,6 +51,7 @@ _{{ page.excerpt }}_
   - [Encrypted DNS](#encrypted-dns)
   - [`/etc/xdg/autostart`](#etcxdgautostart)
   - [`aminda-*.{service,socket}`](#aminda-servicesocket)
+  - [systemd sockets](#systemd-sockets)
 - [Remember!](#remember)
   - [Accessing UEFI setup without key smashing](#accessing-uefi-setup-without-key-smashing)
   - [Recovering selinux policy issues](#recovering-selinux-policy-issues)
@@ -176,7 +177,7 @@ Just remember to `pipx upgrade-all` occassionally!
 This section is a WIP and to avoid having to install some rpm-ostree...
 
 ```
-brew install aircrack-ng btop htop inxi ipfs llvm mpv mtr neovim nmap node pipx pre-commit qrencode ruby smartmontools symlinks zsh
+brew install aircrack-ng btop htop inxi ipfs llvm mtr neovim nmap node pipx pre-commit qrencode ruby smartmontools symlinks
 ```
 
 ## Fedora Atomic
@@ -189,7 +190,7 @@ bit...
 # Ensure third party Fedora repos are available, this is part of KDE Prompt?
 sudo fedora-third-party enable
 # Layer packages I need on top of the base image.
-sudo rpm-ostree install android-tools cronie cronie-anacron darkman duperemove foot foot-terminfo gamescope git-lfs haveged iwd mangohud mosh rng-tools setroubleshoot snapd sshguard steam-devices syncthing terminus-fonts-console tmux tor torsocks unbound zsh
+sudo rpm-ostree install android-tools cronie cronie-anacron darkman duperemove foot foot-terminfo gamescope git-lfs haveged iwd mangohud mosh mpv rng-tools setroubleshoot snapd sshguard steam-devices syncthing terminus-fonts-console tmux tor torsocks unbound zsh
 # Remove packages I don't need from the base image. (Challenge to remove
 # nothing failed by using rpmfusion codecs anyway)
 sudo rpm-ostree override remove firefox firefox-langpacks
@@ -217,17 +218,14 @@ Consider also adding
   there is repository breakage risk stopping system upgrades, at least it will
   upgrade itself as opposed to errorring about being a local not upgraded
   package in the future.
-- You need it when using either Broadcom WiFi or
+- You need it when using e.g. Broadcom WiFi or `mpv` and receiving
-  `Failed to initialize a decoder for codec 'hevc'.` from `mpv` which gets
+  `Failed to initialize a decoder for codec 'hevc'.`
-  resolved by following the instructions for your hardware or software codecs.
 
 ### Additional rpm-ostree install
 
 - In general `neilalexander`'s yggdrasil copr makes life easier with
   `sudo rpm-ostree install yggdrasil`
 - For ThinkPads: `sudo rpm-ostree install tlp tlp-rdw` is good for battery
-- For Broadcom WiFi with `rpmfusion-nonfree` enabled:
-  `sudo rpm-ostree install akmod-wl kernel-devel`
 - For NVIDIA propietary drivers with `sudo fedora-third-party enable`:
   `sudo rpm-ostree install akmod-nvidia xorg-x11-drv-nvidia-cuda`
   - This also requires
@@ -236,11 +234,16 @@ Consider also adding
     [rpmfusion howto nvidia#ostree](https://rpmfusion.org/Howto/NVIDIA#OSTree_.28Silverblue.2FKinoite.2Fetc.29)
 - For Steam Deck and other handhelds with their copr:
   `sudo rpm-ostree install hhd adjustor hhd-ui`
-- Also with rpmfusion for DVD playback
+- rpmfusion packages
-  `sudo rpm-ostree install rpmfusion-free-release-tainted` and
+  - For Broadcom WiFi with `rpmfusion-nonfree` enabled:
-  `sudo rpm-ostree install libdvdcss`
+    `sudo rpm-ostree install akmod-wl kernel-devel`
-- rpmfusion also has `sudo rpm-ostree install pipewire-codec-aptx` which allows
+  - DVD playback: `sudo rpm-ostree install rpmfusion-free-release-tainted` and
-  better quality playback with some BT devices such as Fairbuds XL.
+    `sudo rpm-ostree install libdvdcss`
+  - Bluetooth APTX HD codec: `sudo rpm-ostree install pipewire-codec-aptx` which
+    allows better quality playback with some devices e.g. Fairbuds XL.
+  - For
+    [hevc playback support](https://discussion.fedoraproject.org/t/how-do-i-enable-h265-hevc-playback-in-fedora-41-or-42-2025/147870),
+    `sudo rpm-ostree install libavcodec-freeworld`
 
 ### Flatpaks
 
@@ -551,6 +554,18 @@ don't forget `/etc/sysctl.d`
 
 - https://codeberg.org/Aminda/shell-things/src/branch/cxefa/etc/systemd/system
 
+### systemd sockets
+
+Starting services on-demand rather than keeping them on all the time. Some of
+these are already on this page, but to recap and have them all in one place:
+
+```bash
+# User services or sockets
+sudo systemctl --global enable foot-server.socket
+# System sockets
+sudo systemctl enable --now ssh.socket sshd.socket avahi-daemon.socket systemd-oomd.socket oidentd.socket
+```
+
 ## Remember!
 
 Not quite configuration, but I am not going to start inventing a new place for