Firmware flashing

how_to

@@ -31,6 +31,8 @@ Usefull packages :
         lnav
     Backlight management:
         light               # http://haikarainen.github.io/light/
+    IRC:
+        catgirl             # https://git.causal.agency/catgirl
 
 System setup:
     display/drivers:
@@ -106,9 +108,8 @@ keyboard :
 Nice environment :
     cd ~
     git clone http://gitlab.rezometz.org/lhark/rc.git
-    [git -C rc checkout v2]
     rc/install.sh
-    chsh -s </bin/zsh|/usr/bin/fish>
+    chsh -s /bin/zsh
 
 pacman :
     -Syu        Upgrade system
@@ -117,7 +118,9 @@ pacman :
     -Sc         Clean packages cache
     -Rns <>     Remove program, its unused dependencies, and config files
     -Qi <>      Package information
-    -Fo <file>  Which package the file belongs to
+    -Ql <>      List files owned by package
+    -Qo <file>  Which package the file belongs to
+    -Qs <>      Search install packages
     Recover installed packages from /var/log/pacman.log
         (awk '$3 ~ /installed/{print $4}' /var/log/pacman.log | sort | uniq; sed -En 's@.*/home/lhark/aur/(.*)/.*@\1@p' /var/log/pacman.log) | sort | uniq -u > package-list
 
@@ -231,6 +234,9 @@ PDF :
         convert [jpg|png|txt|pdf|...] output.pdf
         # Might need to tweak /etc/ImageMagick-7/policy.xml
         # https://stackoverflow.com/questions/52998331/imagemagick-security-policy-pdf-blocking-conversion
+    Create pdf from images losslessly:
+        pacman -S img2pdf
+        img2pdf -o <out.pdf> <in1.jpg..inN.jpg>
     Fill form & annotate:
         For well formatted interactive forms:
             evince
@@ -242,6 +248,7 @@ PDF :
             inkscape
         Batch mode with pdftk:
             # http://www.myown1.com/linux/pdf_formfill.shtml
+            # https://blog.nemirwen.me/posts/batch-pdf-form-filling
             Finding the fields:
                 # pdftk needs java-commons-lang
                 pdftk form.pdf dump_data_fields_utf8 > fields.flds
@@ -254,11 +261,11 @@ PDF :
             Filling the form:
                 pdftk form.pdf fill_form fields.fdf output filled_form.pdf
 
-Generate a PDF quickly from Markdown:
+    Generate a PDF quickly from Markdown:
         # tectonic is pretty nice as a "it just works" latex compiler
         pandoc --pdf-engine=tectonic in.md -o out.pdf
 
-Fill dynamic XFA forms on linux:
+    Fill dynamic XFA forms on linux:
         Run Acrobat Reader DC 2019 on wine:
             https://linuxconfig.org/how-to-install-latest-adobe-acrobat-reader-dc-on-ubuntu-18-04-bionic-beaver-linux-with-wine
             https://www.quora.com/How-do-I-install-Adobe-Reader-on-Ubuntu-using-the-Wine-software
@@ -306,6 +313,8 @@ Wallpapers :
             center selection
             etc.
 
+        Or use https://github.com/aearil/dustr in a loop
+
 
 Drag & drop files:
     dragon : https://github.com/mwh/dragon
@@ -341,6 +350,9 @@ Network Manager:
         Under IPv4:
             select Shared
 
+    Chrony integration:
+        trizen -S https://aur.archlinux.org/networkmanager-dispatcher-chrony.git/
+
 Power saving :
     echo "vm.dirty_writeback_centisecs = 6000" >> /etc/sysctl.d/dirty.conf
     echo "vm.laptop_mode = 5" >> /etc/sysctl.d/laptop.conf
@@ -459,19 +471,18 @@ Borg backup:
 
 Serial terminal
     st -l /dev/ttyUSB0 <baud>
+    # Or
+    minicom -D /dev/ttyUSB0 -b <baud>
 
 Wifi AP:
-    https://wiki.archlinux.org/index.php/Software_access_point
+    # https://wiki.archlinux.org/index.php/Software_access_point
     sudo pacman -S create_ap
-    https://github.com/oblique/create_ap/issues/107
+    # https://github.com/oblique/create_ap/issues/107
     sed -i '/CHANNEL=$WIFI_IFACE_CHANNEL/d' /usr/bin/create_ap
-    Replace is_wifi_connected with:
-        is_wifi_connected() { return 1 }
+    # Replace is_wifi_connected with:
+    #    is_wifi_connected() { return 1 }
     sudo create_ap [-c <channel>] wlp2s0 wlp2s0 <ssid> <pwd>
 
-Sync from phone:
-    adb-sync -R /sdcard/<folder>/ <dest>
-
 fail2ban unban:
     Check if/where IP is banned
         iptables -L -n | less
@@ -485,33 +496,6 @@ fail2ban unban:
         # Remove leading "-A "
         iptables -D <rule>
 
-Backup non rooted phone with adb:
-    adb backup -all -shared -obb -f <file>
-    need adb < 1.0.31
-    sometimes you might need to quote all arguments together
-
-Root Samsung GT-S7275R "Ace 3" :
-    Use heimdall (cross platform equivalent to Samsung's Odin)
-    Install TWRP recovery:
-        Boot phone to download mode (Hold vol-down & home at boot)
-        Connect USB
-        $ heimdall flash --RECOVERY <recovery.img>
-        Keep vol-up & home pressed during reboot to go straight into recovery or img is overwritten by stock ROM
-    Flash CM13:
-        Use TWRP to Wipe system, data, dalvik & cache
-        $ adb push <cm13.zip> /sdcard
-        Use TWRP to flash CM13
-    Setup tips:
-        Activate dev mode by spamming Settings > About > Build
-        Enable USB debugging
-        Settings > Developer Options > Root Access
-    Sources:
-        https://forum.xda-developers.com/ace-3/development/recovery-t-r-p-samsung-galaxy-ace-3-lte-t2989278
-        https://web.archive.org/web/20160321062212/https://davideddu.org/blog/posts/how-to-flash-a-recovery-image-using-heimdall/
-        https://twrp.me/devices/samsunggalaxyace3.html
-        https://forum.xda-developers.com/ace-3/development/gt-s7275r-b-t-cyanogenmod-13-ace-3-lte-t3242054
-        https://forum.xda-developers.com/ace-3/development/gt-s7275r-b-t-cyanogenmod-14-samsung-t3468084
-
 Nginx + uwsgi:
     $ pacman -S nginx (nginx-runit) uwsgi uwsgi-plugin-python
     /etc/
@@ -568,25 +552,39 @@ Nginx + uwsgi:
     runit:
         echo "exec uwsgi --ini /etc/uwsgi/emperor.ini --logto /var/log/uwsgi.log" > /etc/sv/uwsgi/run
 
-Easy LaTeX compilation:
+LaTeX:
+    Easy LaTeX compilation:
         $ trizen -S tectonic
         $ tectonic <file>.tex
         Should automatically resolve all dependencies
         Also takes care of biblatex
         Uses Xetex to compile
+    Subtle enby non-binary flag in latex:
+        # Thx @Scarlet
+        \newcommand\crule[3][black]{\textcolor{#1}{\rule{#2}{#3}}}
+        \definecolor{nb1}{RGB}{255,244,48}
+        \definecolor{nb2}{RGB}{220,220,220}
+        \definecolor{nb3}{RGB}{156,89,209}
+        \definecolor{nb4}{RGB}{0,0,0}
+        \begin{center}
+        \crule[nb1]{0.5cm}{0.1cm}
+        \crule[nb2]{0.5cm}{0.1cm}
+        \crule[nb3]{0.5cm}{0.1cm}
+        \crule[nb4]{0.5cm}{0.1cm}
+        \end{center}
 
 Rename files from date of creation:
     for f in *;do
         mv "$f" "$(date "+IMG_%Y%m%d_%H%M%S.${f##*.}" -r "$f")"
     done
 
-    Dans le cas d'android, utiliser tar -cf pour garder les timestamps
+    In Android's case, use tar -cf to keep the timestamps
 
-Deduplication de fichiers:
+file deduplication:
     find ./ -type f -exec md5sum '{}' + | tee imgmd5
     cat imgmd5| sort | uniq --check-chars=32 -d | cut --characters=35- | xargs rm
-    # Pour le debug : | xargs feh -.
-    # Voir aussi la commande cmp, plus efficace qu'un calcul de hash dans certains cas
+    # For debugging : | xargs feh -.
+    # See also the `cmp` command, might be more efficient than a hash computation
 
 Install and update YouCompleteMe on Arch:
     sudo pacman -S clang cmake
@@ -627,7 +625,8 @@ Install 64 bits kernel on 32 bits system (and 64 bits hardware) (bad idea)
 
 Compile C for ATmega328p/Arduino:
     sudo xbps-install -S avr-gcc avr-libc avrdude
-    sudo usermod -aG dialout <user> # Or /dev/ttyACM0 group
+    sudo pacman -S avr-libc avrdude
+    sudo usermod -aG dialout <user> # Or /dev/ttyACM0 group (might be uucp)
 
     avr-gcc -g -Os -DF_CPU=16000000UL -mmcu=atmega328p -c -o <name>.o <name>.c
     avr-gcc -mmcu=atmega328p <name>.o -o <name>
@@ -676,15 +675,15 @@ Get hardware informations:
         dmidecode -t memory
     Others values are <bios|baseboard|chassis>
 
-Music fingerprinting
+Music fingerprinting:
     # https://github.com/beetbox/pyacoustid
     for f in *.mp3;do echo $f; python ~/src/pyacoustid/aidmatch.py $f;done > ident
     awk '/\.mp3/{f = $0;next} f{printf "mv %s \"../%s.mp3\"\n", f, $0; f=0}' ident > rename.sh
 
-Echo to stderr
+Echo to stderr:
     >&2 echo "message"
 
-Reset gpg-agent passphrase cache
+Reset gpg-agent passphrase cache:
     Useful mainly for testing purposes
     echo RELOADAGENT | gpg-connect-agent
 
@@ -703,84 +702,29 @@ Better Bibtex, Zotero:
 Bumblebee runit fix:
     sed -i 's/Driver=$/Driver=nvidia/' /etc/bumblebee/bumblebee.conf
 
-Uncompress android .ab backup files:
+Runit logging:
+    socklog
+        * syslogd replacement
+        * gets messages sent via syslog() (into /dev/log)
+    svlogd
+        * builtin log rotation
+        * needs to be setup for each service (/etc/runit/sv/<service>/log/run)
+            `exec chpst -u log svlogd -tt /var/log/<service>`
+            $ sudo mkdir /var/log/<service>
+            $ sudo chown -R :log /var/log/<service>
+            $ sudo chmod g+w /var/log/<service>
+    runsvdir
+        * sends its stdout to /dev/console
+        * sends its stderr to its own command line (ps aux | grep runsvdir)
+    runsv
+        * if <service>/log exists, redirects service's stdout to logger's stdin
+        * by default, runsv's stderr, stdout (and stdin?) are redirected to /dev/console
+Android:
+    Uncompress android .ab backup files:
         # https://stackoverflow.com/questions/18533567/how-to-extract-or-unpack-an-ab-file-android-backup-file
         ( printf "\x1f\x8b\x08\x00\x00\x00\x00\x00" ; tail -c +25 backup.ab ) |  tar xfvz -
 
-Fix: Failed to activate service 'org.freedesktop.login1': timed out:
-    If dbus has been restarted, don't forget to restart elogind/systemd-logind
-
-Artix:
-    Artixlinux pacman gpg unknown trust fix:
-        sudo pacman-key --init
-        sudo pacman-key --populate archlinux artix
-    Or if it's an old system:
-        sudo pacman -S archlinux-keyring
-    Artixlinux steam lib32-systemd fix:
-        https://forum.artixlinux.org/index.php/topic,633.msg7437.html
-        [Attached file]: resources/lib32-systemd-dummy.pkgbuild
-    Open-rc keymap:
-        /etc/conf.d/keymaps
-
-LibreOffice unlock write-protected doc:
-    Format -> Sections... -> [Uncheck Protect in "Write protection"]
-
-Euro truck simulator 2:
-    Enable additional beams (roof, bumper, etc.)
-        <F4> then tick "Roof" and "Aux"
-    Run ETS2Studio under wine
-        winetricks dotnet45
-        Confirmed to work on a 32 bits prefix, untested on 64
-
-ssh:
-    get machine fingerprints:
-        Local
-            find /etc/ssh/ -name "ssh_host_*.pub" -exec ssh-keygen -lf '{}' \;
-        Remote
-            ssh-keyscan <hostname> 2>/dev/null | ssh-keygen -lf /dev/stdin
-    Generate secure keypairs
-        # https://security.stackexchange.com/a/144044
-        Elliptic curve: best but maybe not supported everywhere
-            ssh-keygen -t ed25519 -a 100
-        Good ol' RSA, with 4096 bits for good measure
-            ssh-keygen -t rsa -b 4096 -o -a 100
-
-Run MSVC on linux with Wine:
-    As seen on the internet, not tested:
-    https://hackernoon.com/a-c-hello-world-and-a-glass-of-wine-oh-my-263434c0b8ad
-    Also this docker atrocity:
-    https://github.com/mstorsjo/msvc-wine
-    /!\ You need to get the original files from a windows machine/VM
-
-Simple python HTTP server:
-    Supports --help option
-    python3:
-        python -m http.server [port]
-    python2:
-        python -m SimpleHTTPServer [port]
-
-Elegant deduplication lines in file:
-    https://iridakos.com/how-to/2019/05/16/remove-duplicate-lines-preserving-order-linux.html
-    awk '!visited[$0]++' your_file > deduplicated_file
-
-Run studiotax on wine:
-    http://pnijjar.freeshell.org/2018/studiotax/
-    WINEARCH=win32
-    winetricks settings win7  # Might not be necessary
-    winetricks dlls dotnet45 ie6
-    winetricks settings win7
-    wine ./StudioTax2017Install.exe /extract
-    msiexec /i StudioTax.msi
-
-Easily switch to russian phonetic keyboard:
-    setxkbmap fr,ru -variant ,phonetic -option grp:shift_caps_toggle
-    man xkeyboard-config  # get list of possible toggles
-
-Image/photo sorting with feh:
-    feh --action1 'mv -v %F "/path/to/target/"%N' \
-        --action[2-9] [...] /dir/to/sort
-
-Setup udev for android device with adb:
+    Setup udev for android device with adb:
         # Solves "adb: error: failed to get feature set: insufficient permissions for device"
         # https://wiki.archlinux.org/index.php/Android_Debug_Bridge#Adding_udev_Rules
         Get Vendor and and product IDs with
@@ -798,33 +742,37 @@ Setup udev for android device with adb:
             SUBSYSTEM=="usb",ATTR{idVendor}=="<your vendor id>",ATTR{idProduct}=="<your product id>",SYMLINK+="android_fastboot"
         $ sudo udevadm control --reload-rules
 
-Get original windows key from linux:
-    # From: https://twitter.com/BrandonPrry/status/1038269038881898498
-    # Not guaranted to work
-    sudo cat /sys/firmware/acpi/tables/MSDM | tail -c 32 | xargs -0 echo
+    Setup android emulator:
+        trizen -S android-emulator \
+                android-google-apis-x86-system-image-23 \
+                android-sdk-cmdline-tools-latest  # Some tools are borked in the original package
+        source /etc/profile  # Update PATH
+        # avdmanager will complain about permissions at first start but will
+        # happily put AVDs in /root/.android/avd if you let it have it for too long
+        /opt/android-sdk/cmdline-tools/latest/bin/avdmanager create avd \
+                --force \
+                --name <your AVD name> \
+                --package 'system-images;android-23;google_apis;x86'  # Match path in /opt/android-sdk/system-images/
+        # AVD is stored in ~/.android/avd/
+        # Enable using the hardware keyboard, and switch layout to azerty
+        sed -i  -e 's/\(hw.keyboard=\).*/\1yes/' \
+                -e 's/\(hw.keyboard.charmap=\).*/\1azerty/' \
+                ~/.android/avd/<your AVD name>.avd/config.ini
+        # If you have issues running image from different arch, try checking the PATH or
+        # https://www.bram.us/2017/05/12/launching-the-android-emulator-from-the-command-line/
+        emulator -avd <your AVD name> [-camera-back <none|emulated|webcam0|virtualscene>]
 
-Wayland install:
-    Qt issues:
-        sudo pacman -S qt5-wayland
-        export QT_QPA_PLATFORM="wayland"
-    sudo/root issues with GUI apps:
-        # https://bugzilla.redhat.com/show_bug.cgi?id=1274451
-        xhost +SI:localuser:root
-        sudo <gui>
-        xhost -SI:localuser:root  # Clean up the security hole
+        # Other method, never tried: https://acavalin.com/p/android_emu
 
-MSI ge62 webcam not found:
-    Activate using fn+F6
-
-Air Canada PNR access:
-    https://services.aircanada.com/ServicingPNR/Ancillary/ACO/
-
-Android diagnostic debug phone codes:
+    Android diagnostic debug phone codes:
         # https://www.itworld.com/article/2708985/debug-your-phone-with-these-hidden-android-secret-codes.html
         # https://www.redmondpie.com/hidden-android-secret-codes-for-samsung-htc-motorola-sony-lg-and-other-devices/
+
+        Confirmed working on Samsung Galaxy Ace 3:
             *#06# – IMEI number
-    *#0*# – Enter the service menu on newer phones like Galaxy S III
             *#*#4636#*#* – Phone information, usage statistics and battery
+
+        *#0*# – Enter the service menu on newer phones like Galaxy S III
         *#*#34971539#*#* – Detailed camera information
         *#*#273282*255*663282*#*#* – Immediate backup of all media files
         *#*#197328640#*#* – Enable test mode for service
@@ -872,9 +820,156 @@ Android diagnostic debug phone codes:
         ##3282# – Show EPST menu
         ##786# – Reverse Logistics Support
 
-Android wpa_supplicant conf file path:
+    Android wpa_supplicant conf file path:
         /data/misc/wifi/wpa_supplicant.conf
 
+    Sync from phone:
+        adb-sync -R /sdcard/<folder>/ <dest>
+
+    Backup non rooted phone with adb:
+        adb backup -all -shared -obb -f <file>
+        need adb < 1.0.31
+        sometimes you might need to quote all arguments together
+
+    Root Samsung GT-S7275R "Ace 3" :
+        Use heimdall (cross platform equivalent to Samsung's Odin)
+        Install TWRP recovery:
+            Boot phone to download mode (Hold vol-down & home at boot)
+            Connect USB
+            $ heimdall flash --RECOVERY <recovery.img>
+            Keep vol-up & home pressed during reboot to go straight into recovery or img is overwritten by stock ROM
+        Flash CM13:
+            Use TWRP to Wipe system, data, dalvik & cache
+            $ adb push <cm13.zip> /sdcard
+            Use TWRP to flash CM13
+        Setup tips:
+            Activate dev mode by spamming Settings > About > Build
+            Enable USB debugging
+            Settings > Developer Options > Root Access
+        Sources:
+            https://forum.xda-developers.com/ace-3/development/recovery-t-r-p-samsung-galaxy-ace-3-lte-t2989278
+            https://web.archive.org/web/20160321062212/https://davideddu.org/blog/posts/how-to-flash-a-recovery-image-using-heimdall/
+            https://twrp.me/devices/samsunggalaxyace3.html
+            https://forum.xda-developers.com/ace-3/development/gt-s7275r-b-t-cyanogenmod-13-ace-3-lte-t3242054
+            https://forum.xda-developers.com/ace-3/development/gt-s7275r-b-t-cyanogenmod-14-samsung-t3468084
+
+    Update Emojis on old androids:
+        # https://toot.party/@SigmaOne/106159205703917847
+        Custom NotoColorEmoji.ttf in /system/fonts/
+
+Fix: Failed to activate service 'org.freedesktop.login1': timed out:
+    If dbus has been restarted, don't forget to restart elogind/systemd-logind
+
+Artix:
+    Artixlinux pacman gpg unknown trust fix:
+        sudo pacman-key --init
+        sudo pacman-key --populate archlinux artix
+    Or if it's an old system:
+        sudo pacman -S archlinux-keyring
+    Artixlinux steam lib32-systemd fix:
+        https://forum.artixlinux.org/index.php/topic,633.msg7437.html
+        [Attached file]: resources/lib32-systemd-dummy.pkgbuild
+    Open-rc keymap:
+        /etc/conf.d/keymaps
+
+LibreOffice unlock write-protected doc:
+    Format -> Sections... -> [Uncheck Protect in "Write protection"]
+
+Euro truck simulator 2:
+    Enable additional beams (roof, bumper, etc.)
+        <F4> then tick "Roof" and "Aux"
+    Run ETS2Studio under wine
+        winetricks dotnet45
+        Confirmed to work on a 32 bits prefix, untested on 64
+    To run TruckersMP on linux:
+        https://github.com/truckersmp-cli/truckersmp-cli
+
+ssh:
+    get machine fingerprints:
+        Local
+            find /etc/ssh/ -name "ssh_host_*.pub" -exec ssh-keygen -lf '{}' \;
+        Remote
+            ssh-keyscan <hostname> 2>/dev/null | ssh-keygen -lf /dev/stdin
+    Generate secure keypairs
+        # https://security.stackexchange.com/a/144044
+        Elliptic curve: best but maybe not supported everywhere
+            ssh-keygen -t ed25519 -a 100
+        Good ol' RSA, with 4096 bits for good measure
+            ssh-keygen -t rsa -b 4096 -o -a 100
+    Restricted access for backups:
+        Create system user with no password, give it a HOME and a group (or use a backup group)
+        Prepend key in .ssh/authorized_keys with
+            command="scp -f /path/to/<file|wildcard>",no-agent-forwarding,no-port-forwarding,no-pty,no-X11-forwarding ssh-rsa AAAAB[...]
+        Setup rssh
+            pacman -S rssh
+            # Access bits order: rsync, rdist, cvs, sftp, scp, svnserve
+            echo "user=<backup user>:<umask>:000010:" >> /etc/rssh.conf
+            sudo chsh -s /usr/bin/rssh <backup user>
+    Fix key auth:
+        chmod 700 ~/.ssh/
+        chmod 600 ~/.ssh/authorized_keys
+    Allow connections from behind a NAT:
+        from NAT-ed machine:
+            ssh -R 2222:localhost:22 <user>@<server>
+        from server:
+            ssh -p 2222 <user>@127.0.0.1
+
+Run MSVC on linux with Wine:
+    As seen on the internet, not tested:
+    https://hackernoon.com/a-c-hello-world-and-a-glass-of-wine-oh-my-263434c0b8ad
+    Also this docker atrocity:
+    https://github.com/mstorsjo/msvc-wine
+    /!\ You need to get the original files from a windows machine/VM
+
+Simple python HTTP server:
+    Supports --help option
+    python3:
+        python -m http.server [port]
+    python2:
+        python -m SimpleHTTPServer [port]
+
+Elegant deduplication lines in file:
+    https://iridakos.com/how-to/2019/05/16/remove-duplicate-lines-preserving-order-linux.html
+    awk '!visited[$0]++' your_file > deduplicated_file
+
+Run studiotax on wine:
+    http://pnijjar.freeshell.org/2018/studiotax/
+    WINEARCH=win32
+    winetricks settings win7  # Might not be necessary
+    winetricks dlls dotnet45 ie6
+    winetricks settings win7
+    wine ./StudioTax2017Install.exe /extract
+    msiexec /i StudioTax.msi
+
+Easily switch to russian phonetic keyboard:
+    setxkbmap fr,ru -variant ,phonetic -option grp:shift_caps_toggle
+    man xkeyboard-config  # get list of possible toggles
+
+Image/photo sorting with feh:
+    feh --action1 'mv -v %F "/path/to/target/"%N' \
+        --action[2-9] [...] /dir/to/sort
+
+Get original windows key from linux:
+    # From: https://twitter.com/BrandonPrry/status/1038269038881898498
+    # Not guaranted to work
+    sudo cat /sys/firmware/acpi/tables/MSDM | tail -c 32 | xargs -0 echo
+
+Wayland install:
+    Qt issues:
+        sudo pacman -S qt5-wayland
+        export QT_QPA_PLATFORM="wayland"
+    sudo/root issues with GUI apps:
+        # https://bugzilla.redhat.com/show_bug.cgi?id=1274451
+        xhost +SI:localuser:root
+        sudo <gui>
+        xhost -SI:localuser:root  # Clean up the security hole
+
+MSI ge62 webcam not found:
+    Activate using fn+F6
+
+Air Canada PNR access:
+    https://services.aircanada.com/ServicingPNR/Ancillary/ACO/
+
 Grub2 theme customization:
     theme.txt reference:
         http://wiki.rosalab.ru/en/index.php/Grub2_theme_/_reference#Main_file_syntax
@@ -889,7 +984,7 @@ Limit bandwidth, download/upload speed of process:
         XferCommand = /usr/bin/wget --limit-rate 100K --passive-ftp -c -O %o %u
 
 Qutebrowser
-    Adblocking:
+    Adblocking (obsolete, now builtin):
         https://gitlab.com/jgkamat/jblock
     Config:
         :set auto-save.session true
@@ -997,9 +1092,12 @@ Check for available package updates with Arch/Artix:
     sudo pacman -S pacman-contrib
     checkupdates
 
-Git push and pull using different URL/protocols:
+Git:
+    Git push and pull using different URL/protocols:
         # https://www.scivision.dev/git-pull-https-push-ssh/
         git config url."git@example.org:user/".pushInsteadOf "https://example.org/user/"
+    Prevent git from trying to auto-detect user name and email:
+        user.useConfigOnly = true
 
 Setup a midi synth:
     # http://www.tedfelix.com/linux/linux-midi.html
@@ -1061,3 +1159,76 @@ GPG:
 
 Windows use realtime clock as UTC:
     HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation\RealTimeIsUniversal = QWORD 0x01
+
+sway / wayland:
+    Get current active (first) keyboard layout name:
+        # https://queer.hacktivis.me/objects/73823f56-1954-44fe-b046-39e726cca67b
+        swaymsg -t get_inputs | jq 'map(select(.type == "keyboard"))[0].xkb_active_layout_name'
+
+Bluetooth:
+    Get access to deprecated gatttool, hcitool or sdptool:
+        trizen -S bluez-utils-compat
+            Add `--disable-systemd` to ./configure command on Artix
+    Setup new device with bluetoothctl:
+        # https://wiki.archlinux.org/title/Bluetooth#Pairing
+        bluetoothctl
+        [bluetooth]# power on
+        [bluetooth]# scan on
+        [bluetooth]# pair <MAC>
+    Fix `Failed to connect: org.bluez.Error.Failed`:
+        # In my case it was apparently pulseaudio's fault oO
+        sudo pacman -S pulseaudio-bluetooth
+        pactl load-module module-bluetooth-discover
+    Send files (WIP, still not working here):
+        # https://www.garron.me/en/go2linux/how-transfer-files-bluetooth-linux.html
+        # https://wiki.archlinux.org/title/ObexFTP
+        OBEX Object Push method:
+            trizen -S obexftp
+            sdptool search --bdaddr 00:18:31:12:3A:3F OPUSH | grep -i channel
+            # `--nopath --noconn --uuid none` result in making an Obex Push request
+            obexftp --nopath --noconn --uuid none --bluetooth <MAC> --channel <CHANNEL> --put <FILE>
+        OBEX File Transfer method:
+            trizen -S obexftp
+            sdptool search --bdaddr 00:18:31:12:3A:3F FTP | grep -i channel
+            # `--channel` (and so sdptool search) might be superfluous (autodetect?)
+            obexftp --bluetooth <MAC> --channel <CHANNEL> --put <FILE>
+        Blueman method:
+            sudo pacman -S blueman
+            blueman-sendto --device=<MAC> <FILE>
+            # Also, for the GUI:
+            blueman-manager
+        ussp-push method:
+            trizen -S ussp-push
+            ussp-push <MAC> <LOCAL FILE> <REMOTE FILE NAME>
+    Receive files:
+        # https://gitlab.com/obexpushd/mainline
+        # Not even packaged on the AUR for now
+    Bluetooth tools recap' (2007):
+        # https://hanishkvc.wordpress.com/2007/05/16/short-and-simple-commandline-bluetooth-in-any-new-linux-distros/
+
+Extract debian .deb package:
+    ar x <package>.deb
+    tar xf data.tar.xz
+
+Convert docx to text format in CLI:
+    # Better fidelity wrt. the document layout
+    docx2txt <name>.docx
+    # Can output markdown
+    pandoc <name>.docx -o <name>.md
+
+Flash BIOS using CH341A and SOP8 clip:
+    Hardware setup:
+        /!\ Don't connect USB before everything else is plugged-in correctly
+        /!\ Remove all source of alimentation from the target board (power jack AND battery)
+        Connect clip to EEPROM: red wire is pin 1
+        Connect clip to CH341A: use the SPI/BIOS side of the programmer
+    Reading firmware:
+        sudo pacman -S flashrom
+        # Flashrom list of supported chips: https://www.flashrom.org/Supported_hardware
+        # https://wiki.archlinux.org/title/Flashing_BIOS_from_Linux#Flashrom
+        sudo flashrom --programmer ch341a_spi -r backup1.bin
+        sudo flashrom --programmer ch341a_spi -r backup2.bin
+        # Check we got a correct read
+        cmp backup1.bin backup2.bin
+    Flashing firmware:
+        sudo flashrom --programmer ch341a_spi -w <new_firmware.bin>

vimtricks

@@ -6,6 +6,7 @@ NORMAL MODE
     <C-W>[HJKL]     Move split to extreme left, bottom, top, right
     c%              Replace argument with arbitrary nested paren/brackets/etc...
                     https://thepugautomatic.com/2014/03/vims-life-changing-c-percent/
+    g<C-G>          count words
 
 VISUAL MODE
     <C-V>g<C-A/X>        Convert column of identical number to inc/decrementing list