Merge branch 'dev' into vhs

Makefile

@@ -4,6 +4,8 @@ EDITOR ?= vi
 FZF != command -v sk || command -v fzy || command -v fzf || \
 	{ echo install a fuzzy finder && exit 1 ;}
 
+spill_contents = sed -e '1,/---/d'
+
 help: ## Print the help message
 	@awk 'BEGIN {FS = ":.*?## "} /^[0-9a-zA-Z._-]+:.*?## / {printf "\033[36m%s\033[0m : %s\n", $$1, $$2}' $(MAKEFILE_LIST) | \
 		sort | \
@@ -11,31 +13,38 @@ help: ## Print the help message
 
 articles != find * -type f -name "*.md"
 
-categories != ls -d */
+dirs != ls -d */
+categories = $(patsubst %/, %, $(dirs))
 
-databases = $(patsubst %/, .dbs/%.rec, $(categories))
+databases = $(patsubst %, .dbs/%.rec, $(categories))
 
 default += $(databases)
 
-$(databases): .dbs/%.rec: %/ | .dbs/
+$(foreach dir, $(categories), \
+	$(eval .dbs/$(dir).rec: $(wildcard $(dir)/*)) \
+	)
+
+$(databases): .dbs/%.rec: %/
 	$(info making $(@F))
-	mkdir -p $(@D)
+	@mkdir -p $(@D)
 	for entry in $(shell find $< -type f -name "*.md") ; do \
 		sed -n '2,/^---$$/ {/^---$$/d; p}' "$$entry" |\
 		sed -e 's/\[ //'  -e 's/ \]//' |\
 		tr -d '"' ;\
 		printf "wordcount: %s\n" "$$(wc -w < $$entry)" ;\
 		printf "file: %s\n\n" "$$entry" ;\
-	done >> $@
+	done > $@
 	for entry in $(shell find $< -type f -name "*.md"); do \
 		recset $@ -e "file = '$${entry}'" -f wordcount --set-add="$$(wc -w < $${entry})" ;\
+		recset $@ -e "file = '$${entry}'" -f content --set-add="$$($(spill_contents) $${entry})" ;\
 	done
 
 db.rec: $(databases)
 	printf '%s\n' '%rec: guide' > $@
+	printf '%s\n' '%key: title' >> $@
 	printf '%s\n' '%type: wordcount int' >> $@
 	printf '%s\n\n' '%sort: title' >> $@
-	cat $^ >> $@
+	recsel $^ >> $@
 	recsel $@ -e "requires != ''" -CR title,requires |\
 	while read title requires; do \
 		IFS=', ' && for provider in $$requires; do \

README.md

@@ -20,6 +20,7 @@ recsel db.rec -q gpg
 recsel db.rec -e "title = 'ssh'"
 recsel db.rec -e "title ~ 'ssh'"
 recsel db.rec -e "title ~ 'bash'" -R title,wordcount
+recsel db.rec -m 1 -P content | less -R
 ```
 
 # Style

basics/kernel.md

@@ -1,34 +0,0 @@
----
-title: "kernel"
-tags: [ "Basics" ]
----
-## Living Space
-
-Kernel modules live in lib/modules/$(uname -r)
-
-## Change
-
-Load them with
-
-```bash
-sudo modprobe ath9k
-```
-
-Or remove one with
-
-```bash
-sudo modprove uvcvideo
-```
-
-The PC's irritating speaker beep can be really annoying. Disable it with:
-
-```bash
-sudo modprobe -r pcspeaker
-```
-
-Permanently disable a module by blacklisting it in `/etc/modprobe.d`:
-
-```bash
-echo 'blacklist pcspkr' > /etc/modprobe.d/*nobeep*.conf
-```
-

data/base_16.md

@@ -1,6 +1,6 @@
 ---
 title: "Base 16"
-tags: [ "Data" ]
+tags: [ "data" ]
 ---
 
 ```bash

data/calcurse.md

@@ -5,5 +5,10 @@ tags: [ "data", "calendar", "daylight savings" ]
 
 ## Setup
 
-The UK government keeps an ics file with clock, [here](https://www.gov.uk/when-do-the-clocks-change/united-kingdom.ics).
+The UK government keeps an `ics` file with clock.
+
+```sh
+wget https://www.gov.uk/when-do-the-clocks-change/united-kingdom.ics
+calcurse -i united-kingdom.ics
+```
 

data/email.md

@@ -9,10 +9,10 @@ Install `opensmtpd` (or similar), then `ncat` or `nc` or `netcat` (this mysterio
 
 Start the `opensmtpd` service, then use netcat to speak with the mail-daemon:
 
-
+```sh
-```
 nc localhost 25
 ```
+
 The computer should respond with code `220`, which means 'I am listening'.
 
 > 220 hex ESMTP OpenSMTPD
@@ -40,7 +40,7 @@ Tell the mail daemon who you are in this format.
 
 Then tell it who you're sending to.
 
-```
+```sh
 RCPT TO: <www@dmz.rs>
 ```
 
@@ -67,7 +67,7 @@ You will find the email under `/var/spool` or `/var/mail` or similar.
 
 If unsure, just take a part of your email, like `FRAGMENT="turn off server please"`, then `grep` for it:
 
- ```bash
+ ```sh
 sudo grep -r $FRAGMENT /var/spool/*
  ```
 

data/exiftool.md

@@ -1,17 +1,17 @@
 ---
 title: "exiftool"
-tags: [ "Metadata" ]
+tags: [ "metadata", "exifdata" ]
 ---
 
-Find metadata.
+Find metadata:
 
-```bash
+```sh
-exiftool image.jpg
+exiftool "$file".jpg
 ```
 
-Find info on all images in current directory.
+Find info on all `.png` images in current directory.
 
-```bash
+```sh
 exiftool -ext .png .
 ```
 
@@ -19,22 +19,14 @@ You can make this recurring with the -r switch.
 
 And overwrite all metadata:
 
-```bash
+```sh
 exiftool -all= -overwrite_original -ext jpg .
 ```
 (NB: This does not work on pdf data. See [here](pdf_erasure.md) for erasing all pdf data)
 
 Or just GPS data:
 
-```bash
+```sh
 exiftool -gps:all= *.jpg
 ```
 
-You can also use the imagemagick tool:
-
-```bash
-identify -verbose
-```
-
-
-

data/git/git-lfs.md

@@ -1,24 +1,72 @@
 ---
 title: "git-lfs"
-tags: [ "data" ]
+tags: [ "data", "git" ]
 ---
 
-Install, and add with
+Git Large File Storage ('LFS') needs to change your `~/.gitconfig` to check out those binary files:
 
-```bash
+```sh
+cat ~/.gitconfig
 git lfs install
+cat ~/.gitconfig
 ```
 
-Then track some filetype with:
+Then track some filetypes with:
 
-```bash
+```sh
-git lfs track "\*.ttf"
+cd $git_repository
+ext=ttf
+git lfs track "*.$ext"
 ```
 
 Or a directory with:
 
-```bash
+```sh
 git lfs track "images/"
 ```
 
-All changes require adding `.gitattributes`.
+Track the changes to `.gitattributes`:
+
+```sh
+git status
+git add .gitattributes
+git commit -m "add $ext to lfs"
+```
+
+## Bash Completion
+
+If bash completion does not work, you'll have to add it:
+
+```sh
+git lfs completion bash |  sudo tee /usr/share/bash-completion/completions/git-lfs 
+```
+
+## Trouble Shooting
+
+You have some file "$FILE".png, which has some problem.
+
+Check the filetype:
+
+```sh
+file "$FILE".png
+```
+
+This should say the type is 'image'.
+If it says the type is 'text', then this file is really just a reminder to `git-lfs` to check out that file.
+
+Check `git-lfs` is expecting that file:
+
+```sh
+git lfs status
+git lfs ls-files
+```
+
+...then try these commands, and check the filetype again:
+
+```sh
+git lfs fetch --all
+git lfs fsck
+git lfs checkout
+git lfs status
+```
+

data/git/subtree.md

@@ -1,5 +1,5 @@
 ---
-title: "git"
+title: "git subtree"
 tags: [ "data", "git", "subtree" ]
 ---
 

data/gpg.md

@@ -1,6 +1,6 @@
 ---
 title: "gpg"
-tags: [ "data", "GPG" ]
+tags: [ "data", "gpg" ]
 ---
 
 - [Setup](gpg/basics.md)

data/gpg/extras.md

@@ -1,5 +1,5 @@
 ---
-title: "gpg"
+title: "gpg with vim"
 tags: [ "vim", "data", "GPG" ]
 requires: [ "GPG Basics", "vim basics" ]
 ---

data/groff.md

@@ -1,6 +1,6 @@
 ---
 title: "groff"
-tags: [ "Data" ]
+tags: [ "data", "logic" ]
 ---
 # Basic Documents
 

data/khard.md

@@ -4,57 +4,49 @@ tags: [ "Data" ]
 ---
 Get the basic config:
 
-```bash
+```sh
 mkdir ~/.config/khard
 ```
 
-```bash
+```sh
 cp /usr/share/doc/khard/examples/khard/khard.conf.example ~/.config/khard.conf
 ```
 
 Short list
 
-```bash
+```sh
 khard list
 ```
 
 Longer list
 
-```bash
+```sh
 khard show
 ```
 
 Show from addressbook 'work'
 
-```bash
+```sh
 khard list -a work
 ```
 
 Make a new contact in address book 'family'
 
-```bash
+```sh
 khard new -a family
 ```
 
-```bash
+```sh
 khard edit grampa
 ```
 
-```bash
+```sh
 khard remove bob
 ```
 
 Move contact 'nina' from 'work' to 'home' address book.
 
-```bash
+```sh
 khard move -a home nina -A work
 ```
 
-## Advanced
-
-Merge:
-
-```bash
-khard merge [-a source_abook] [-u uid|search terms [search terms ...]] [-A target_abook] [-U target_uid|-t target_search_terms]
-```
-

data/pass.md

@@ -1,42 +1,42 @@
 ---
 title: "pass"
 tags: [ "data" ]
+requires: "GPG Basics"
 ---
-[Video instructions](https://www.hooktube.com/watch?v=hlRQTj1D9LA)
 
 Setup [gpg](./gpg.md) keys.
 
 Show your gpg secret it:
 
-```bash
+```sh
 gpg --list-secret-keys
 ```
 
 Then use the id number under `sec` to make a pass repo:
 
-```bash
+```sh
 KEY="$(gpg --list-secret-keys  | grep -m 1 -A1 '^sec' | tail -n 1)"
 ```
 
-```bash
+```sh
 pass init $KEY
 ```
 
 To add a basic password, e.g. for `$WEBSITE`:
 
-```bash
+```sh
 pass $WEBSITE
 ```
 
 To insert a multiline password, e.g. with a login name:
 
-```bash
+```sh
 pass add -m $WEBSITE
 ```
 
 Remove a password:
 
-```bash
+```sh
 pass rm $WEBSITE
 ```
 

data/pdf-to-txt.md

@@ -2,7 +2,8 @@
 title: "pdf to txt"
 tags: [ "data", "pdf", "ocr" ]
 ---
-How to translate pdf book images to text (results are very poor, and will need lots of corrections).
+
+How to translate pdfs to text (results are very poor, and will need lots of corrections).
 
 ## Dependencies
 
@@ -17,8 +18,8 @@ pdftoppm -png *file*.pdf test
 ```
 
 ```bash
-for x in \*png; do
+for x in *png; do
-    tesseract -l eng  "$x" - >> *out*.txt
+    tesseract -l eng  "$x" - >> out.txt
 done
 ```
 

data/recfiles.md

@@ -44,6 +44,9 @@ recset -f "$new_field" --delete $database
 
 - [Extended example](recfiles/extended.md)
 - [Playing with board games data](recfiles/Board_Games.md)
+- [Playing with IP addresses](recfiles/IP_ASN.md)
+- [Manage LaTeX Bibliographies](recfiles/bibliography.md)
+- [Fixes](recfiles/recfixes.md)
 
 # Resources
 

data/recfiles/IP_ASN.md

@@ -0,0 +1,16 @@
+---
+title: "IP Addresses with Recfiles"
+tags: [ "data", "recfiles", "games" ]
+requires: "Recfiles"
+---
+
+## Download the Database
+
+Download the csv data, and separate the ipv4 data from the ipv6.
+
+```sh
+curl -Lo ips.zip 'https://www.kaggle.com/api/v1/datasets/download/ipinfo/ipinfo-country-asn'
+unzip -p ips.zip country_asn.csv | csv2rec | recsel -e "start_ip ~ '\.'"  > ipv4.rec
+unzip -p ips.zip country_asn.csv | csv2rec | recsel -e "start_ip ~ '::'"  > ipv6.rec
+```
+

data/recfiles/bibliography.md

@@ -0,0 +1,121 @@
+---
+title: "Recfile Bibliography for TeX"
+tags: [ "data", "database", "recfiles", "tex" ]
+requires: [ "Recfiles", "TeX", "Makefile" ]
+---
+
+Store your bibliography in a `recfile` database, then extract any part with `make`.
+
+For example, you could store books like this in `bibliography.rec`:
+
+```recfile
+%rec: book
+%key: slug
+
+slug: thinkingexperience
+author: H. H. Price
+title: Thinking and Experience
+year: 1953
+publisher: Harvard University Press, Cambridge
+
+slug: inventingrightwrong
+author: John Leslie Mackie
+title: Inventing Right and Wrong
+year: 1997
+publisher: Penguin Books, England
+
+```
+
+Run `make book` to extract `book.bib`, ready for LaTeX to use:
+
+```bib
+@book{thinkingexperience,
+   author = {H. H. Price},
+   title = {Thinking and Experience},
+   year = {1953},
+   publisher = {Harvard University Press, Cambridge},
+}
+
+@book{inventingrightwrong,
+   author = {John Leslie Mackie},
+   title = {Inventing Right and Wrong},
+   year = {1997},
+   publisher = {Penguin Books, England},
+}
+```
+
+The `makefile` syntax is just a few lines (though admittedly employs some garbled shell-crud):
+
+```make
+bibs != grep -Po '%rec: \K.*' bibliography.rec
+bibfiles = $(patsubst %, %.bib, $(bibs))
+
+$(bibfiles): %.bib: bibliography.rec
+	recsel $< -t $(basename $@) |\
+		sed 's/slug: \(.*\)/@$(basename $@){\1,/g' |\
+		sed 's/^\(\b.*\b\): \(.*\)/   \1 = {\2},/gI' |\
+		sed 's/^$$/}\n/g' > $@
+		echo '}' >> $@
+```
+
+Here's a longer `bibliography.rec` file, which can also produce `article.bib`:
+
+```recfile
+%rec: book
+%key: slug
+%type: year int
+%constraint: year > -2000
+%sort: year month
+
+slug: thinkingexperience
+author: H. H. Price
+title: Thinking and Experience
+year: 1953
+publisher: Harvard University Press, Cambridge
+
+slug: inventingrightwrong
+author: John Leslie Mackie
+title: Inventing Right and Wrong
+year: 1997
+publisher: Penguin Books, England
+
+slug: metaphysicscontemporaryintro
+author: Michael J. Loux
+title: Metaphysics: A Contemporary Introduction
+year: 1998
+publisher: Routledge, London
+
+slug: pluralityworlds
+author: David Lewis
+title: On the Plurality of Worlds
+publisher: Blackwell Publishing, Oxford
+year: 2001
+
+%rec: article
+%key: slug
+%sort: year month
+
+slug: genuinerealisttheory
+author: John Divers
+title: A Genuine Realist Theory of Advanced Modalizing
+year: 1999
+pages: 217–240
+month: april
+journaltitle: Mind
+uri: https://academic.oup.com/mind/article-abstract/108/430/217/975258?redirectedFrom=fulltext
+volume: 108
+publisher: Harvard University Press, Cambridge
+
+slug: twokindsmentalrealism
+author: Tam\'{a}s Demeter
+title: Two Kinds of Mental Realism
+year: 2009
+pages: 40:59-71
+uri: https://www.researchgate.net/profile/Tamas_Demeter2/publication/41554923_Two_Kinds_of_Mental_Realism/links/0deec53247f5a4ae21000000.pdf
+month: august
+journaltitle: Journal for General Philosophy of Science
+volume: 30
+publisher: Harvard University Press, Cambridge
+
+```
+

data/recfiles/recfixes.md

@@ -0,0 +1,33 @@
+---
+title: "Recfixes"
+tags: [ "data", "recfiles" ]
+requires: "Recfiles"
+---
+
+Sometimes `recsel` chokes on a large query, and you need to break the query into chunks with a pipe.
+
+This Kickstarter file has 374,853 records.
+Here's the chonky query:
+
+```sh
+recsel kick.rec -e "Category = 'Games'" -p "Subcategory,Avg(Goal)" -G Subcategory
+```
+
+It breaks down like this:
+
+| Chunk                         | Meaning                                       |
+|:-----------------------------:|:---------------------------------------------:|
+| `recsel kick.rec`             | Select records from `kick.rec`                |
+| `-e "Category = 'Games'"`     | Select only records where Category = 'Games'  |
+| `-p "Subcategory,Avg(Goal)"`  | Print the Subcategory and average goal        |
+| `-G "Subcategory"`            | Group by subcategory                          |
+
+Two ways to break the query apart:
+
+```sh
+recsel kick.rec -e "Category = 'Games'" | recsel -p "Subcategory,Avg(Goal)" -G "Subcategory"
+
+recsel kick.rec -e "Category = 'Games'" > games.rec
+recsel games.rec -p "Subcategory" -G "Subcategory"
+```
+

distros/arch/gpu.md

@@ -1,6 +1,6 @@
 ---
-title: "fonts"
+title: "Ach Linux GPU Setup"
-tags: [ "distros" ]
+tags: [ "arch", "GPU" ]
 ---
 # Step 1: Multilib
 
@@ -60,4 +60,3 @@ You should see 'true' here.
 ```bash
 sudo pacman -S --needed lib32-mesa vulkan-radeon lib32-vulkan-radeon vulkan-icd-loader lib32-vulkan-icd-loader xf86-video-amdgpu
 ```
-

hardware/keyboard.md

@@ -9,7 +9,7 @@ This works everywhere, including in a bare-ass tty.
 
 Select a keymap, and create a new custom map.
 
-```bash
+```sh
 su root
 
 basemap=/usr/share/kbd/keymaps/i386/qwerty/pl1.map.gz
@@ -22,7 +22,7 @@ gunzip -c $basemap | \
 
 Tell the system to use this keymap at startup by naming it in the `rc.conf` file:
 
-```bash
+```sh
 echo "KEYMAP=$newmap" >> /etc/rc.conf
 
 cat /etc/rc.conf
@@ -33,24 +33,24 @@ reboot
 
 Set layout to British English.
 
-```bash
+```sh
 setxkbmap -layout gb
 ```
 
 Or Polish with:
 
-```bash
+```sh
 setxkbmap -layout pl
 ```
 
 | Language | short |
-|:--------|:------|
+|:---------|:------|
-| Polish  | pl |
+| Polish   | `pl`  |
-| Serbian | rs |
+| Serbian  | `rs`  |
 
 Set 'alt + shift', as the command which cycles through the British English, Polish and Serbian keyboard layout.
 
-```bash
+```sh
 setxkbmap -layout gb,pl,rs -option grp:alt_shift_toggle
 ```
 

networking/wifi.md

@@ -1,7 +1,8 @@
 ---
-title: "wifi"
+title: "network"
 tags: [ "Networking" ]
 ---
+
 # Netstat Stuff
 
 Stats on local net usage within domain.

networking/wireguard.md

@@ -1,6 +1,6 @@
 ---
 title: "wireguard"
-tags: [ "Networking", "VPN" ]
+tags: [ "networking", "VPN" ]
 ---
 <!--
 from 
@@ -11,25 +11,22 @@ https://engineerworkshop.com/blog/how-to-set-up-wireguard-on-a-raspberry-pi/
 
 Install `wireguard-tools` on the server.
 
-```bash
+```sh
-sudo -i
+su root
-```
-
-```bash
 cd /etc/wireguard
 ```
 
 umask 077
 
-```bash
+```sh
 wg genkey | tee server_private_key | wg pubkey > server_public_key
 ```
 
-```bash
+```sh
 wg genkey | tee client_private_key | wg pubkey > client_public_key
 ```
 
-```bash
+```sh
     echo "
     [Interface]
     Address = 10.0.0.1/24
@@ -46,20 +43,20 @@ wg genkey | tee client_private_key | wg pubkey > client_public_key
     " > /etc/wireguard/wg0.conf
 ```
 
-```bash
+```sh
 echo 'net.ipv4.ip_forward=1' > /etc/sysctl.d/wg.conf
 ```
 
-```bash
+```sh
 systemctl enable --now wg-quiqck@wg0
 ```
 
-```bash
+```sh
 chown -R root:root /etc/wireguard/
 ```
 
-```bash
+```sh
-chmod -R og-rwx /etc/wireguard/\*
+chmod -R og-rwx /etc/wireguard/*
 ```
 
 Forward traffic from port 51900 to the server.
@@ -72,21 +69,25 @@ Install `wireguard-tools` on the client.
 
 Copy the client private key and server public key to the server (or just fill in the variables).
 
-> server_ip=*your server's public ip*
 
-    echo "
+```sh
-    [Interface]
+server_ip=$PUBLIC_IP
-    Address = 10.0.0.2/32
-    PrivateKey = $(cat client_private_key)
-    DNS = 9.9.9.9
 
-    [Peer]
+echo "
-    PublicKey = $(cat server_public_key)
+[Interface]
-    Endpoint = $(echo $server_ip:51900)
+Address = 10.0.0.2/32
-    AllowedIPs = 0.0.0.0/0, ::/0
+PrivateKey = $(cat client_private_key)
-    " > /etc/wireguard/wg0-client.conf
+DNS = 9.9.9.9
 
-> wg-quick up wg0-client
+[Peer]
+PublicKey = $(cat server_public_key)
+Endpoint = $(echo $server_ip:51900)
+AllowedIPs = 0.0.0.0/0, ::/0
+" > /etc/wireguard/wg0-client.conf
+
+wg-quick up wg0-client
+
+```
 
 ## Extras
 
@@ -98,6 +99,6 @@ Add multiple peers by copying the `[peer]` section (they each get called `peer`)
 
 Make a standard client configuration, then:
 
-```bash
+```sh
 qrencode -t ansiutf8 < /etc/wireguard/mobile_user.conf
 ```

networking/wireless.md

@@ -1,60 +1,63 @@
 ---
 title: "wireless"
-tags: [ "Networking" ]
+tags: [ "networking" ]
 ---
 
-# Check wifi's working
+Check wifi's working
-```bash
+
+```sh
 lspci -k
 ```
 
 Or for usb wifi: 
 
-```bash
+```sh
 dmesg | grep usbcore
 ```
 
-... and hopefully it'll say the new interface is registered.
+...and hopefully it'll say the new interface is registered.
 
-# Check if a wifi interface has been created
+Check if a wifi interface has been created
 
-```bash
+```sh
 ip link
 ```
 
-or
+...or
 
-```bash
+```sh
 iw dev
 ```
 
 Assuming it's wlan0, bring it up with 
 
-```bash
+```sh
 ip link set wlan0 up
 ```
 
 Error messages probably means your wireless chipset requires a firmware to function.  In this case, check the kernel messages for firmware being loaded
 
-```bash
+```sh
 dmesg | grep firmware
 ```
 
 # Utilities
 
-iw doesn't do wpa/wpa2.  wpa_supplicant does everything.  iwd does everything except WEXT encryption.
+- `iw` doesn't do wpa/wpa2.
+- `iwd` does everything except WEXT encryption.
+- `wpa_supplicant` does everything.
 
 # Connecting
 
 Get the link status:
 
-```bash
+```sh
 iw dev wlan0 link
 ```
 
 Scan for available points:
 
-```bash
+```sh
 iw dev wlan0 scan
 ```
 

networking/wpa_supplicant.md

@@ -3,55 +3,55 @@ title: "wpa_supplicant"
 tags: [ "Networking" ]
 ---
 
-wpa_supplicant configurations are stored in /etc/wpa_supplicant/wpa_supplicant-wlan0 (or equivalent).
+`wpa_supplicant` configurations are stored in `/etc/wpa_supplicant/wpa_supplicant-wlan0` (or equivalent).
 
 ## WiFi Connection
 
-```bash
+```sh
 wpa_cli
 ```
 
 Once in, scan the network, add an empty place to store credentials, then input them.
 
-```bash
+```sh
 scan
 ```
 
-```bash
+```sh
 scan_results
 ```
 
-```bash
+```sh
 add_network
 ```
 
 This outputs a network number, e.g. '3'.  This is the new network you'll work with.
 
-```bash
+```sh
 set_network *3* ssid *"Kosachok Cafe"*
 ```
 
-```bash
+```sh
 set_network 3 psk *"Kosachok2019"*
 ```
 
 OR (for no password)
 
-```bash
+```sh
 set_network *3* key_mgmt NONE
 ```
 
-```bash
+```sh
 enable_network 3
 ```
 
-```bash
+```sh
 save_config
 ```
 
 This takes a while to connect, so to speed things up, restart the service:
 
-```bash
+```sh
 sudo sv restart wpa_supplicant
 ```
 
@@ -59,13 +59,13 @@ sudo sv restart wpa_supplicant
 
 You can script like this:
 
-```bash
+```sh
 wpa_cli add_network
 ```
 
 That returns an ID, so you can say:
 
-```bash
+```sh
 newNetwork="$(wpa_cli add_network)"
 ```
 
@@ -73,19 +73,19 @@ Then `$newNetwork` would equal that number, and you can add/ remove networks wit
 
 But remember to escape the quotes, so adding a network would be:
 
-```bash
+```sh
 wpa_cli set_network *3* psk *\""passphrase"\"*
 ```
 
 ## Generating Keys Manually
 
-```bash
+```sh
 wpa_passphrase [ssid] [password]
 ```
 
 For example:
 
-```bash
+```sh
 wpa_passphrase 'Cafe Kosachok' 'Kosachok2019'
 ```
 
@@ -95,8 +95,11 @@ If you encounter problems, you will probably need to delete the old device pid i
 
 Next up, start wpa_supplicant:
 
-```bash
+```sh
 wpa_supplicant -B -iwlan0 -c /etc/wpa_supplicant/wpa_supplicant-wlan0
 ```
 
-The -B flag runs this as a background process.  Remove this to see real-time output in order to solve problems.  The -i flag denotes the physical device used for the wifi.  The -c flag points to the configuration file for use.
+The `-B` flag runs this as a background process.
+Remove this to see real-time output in order to solve problems.
+The `-i` flag denotes the physical device used for the wifi.
+The `-c` flag points to the configuration file for use.

system/Makefiles/help.md

@@ -1,5 +1,5 @@
 ---
-title: "Makefiles"
+title: "make help target"
 tags: [ "system", "make", "help" ]
 ---
 

system/kernel.md

@@ -1,8 +1,36 @@
 ---
-title: "kernel"
+title: "kernel modules"
 tags: [ "system" ]
 ---
 
+Kernel modules live in lib/modules/$(uname -r)
+
+## Change
+
+Load them with
+
+```sh
+modprobe ath9k
+```
+
+Or remove one with
+
+```sh
+modprove uvcvideo
+```
+
+The PC's irritating speaker beep can be really annoying. Disable it with:
+
+```sh
+modprobe -r pcspeaker
+```
+
+Permanently disable a module by blacklisting it in `/etc/modprobe.d`:
+
+```sh
+echo 'blacklist pcspkr' > /etc/modprobe.d/*nobeep*.conf
+```
+
 Check which kernel modules are loaded into memory:
 
 ```sh