039 Log of migrating to Linux

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# ls all drivers info
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$ blkid
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# check `fstab` file, find a wrong value
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$ cat /etc/fstab
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# I don't know how to copy and paste in terminal...
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# So, edit driver's id to `/dev/sda1`
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$ vi /etc/fstab
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# reboot machine
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# edit `/etc/fstab` <file system> value to UUID of each driver

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# list ports of your video card
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$ xrandr --props
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# generate a "modeline" with cvt
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# eg. 4k monitor in 60FPS
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$ cvt 3840 2160 60
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# 3840x2160 59.98 Hz (CVT 8.29M9) hsync: 134.18 kHz; pclk: 712.75 MHz
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Modeline "3840x2160_60.00"  712.75  3840 4160 4576 5312  2160 2163 2168 2237 -hsync +vsync
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# edit Xsetup file
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$ sudo vim /usr/share/sddm/scripts/Xsetup
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# add following
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xrandr --newmode "3840x2160_60.00"  712.75  3840 4160 4576 5312  2160 2163 2168 2237 -hsync +vsync
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xrandr --addmode DisplayPort-1 3840x2160_60
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xrandr --output DisplayPort-1 --mode 3840x2160_60

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# list devices
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$ xsetwacom --list devices
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Wacom Intuos BT M Pen stylus            id: 10  type: STYLUS
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Wacom Intuos BT M Pad pad               id: 11  type: PAD
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Wacom Intuos BT M Pen eraser            id: 13  type: ERASER
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Wacom Intuos BT M Pen cursor            id: 14  type: CURSOR
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# change feature of button 2 to pan
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$ xsetwacom --set "Wacom Intuos BT M Pen stylus" Button 2 "pan"
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# increase the sensitivity of panning action
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$ xsetwacom --set "Wacom Intuos BT M Pen stylus" "PanScrollThreshold" 40

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# Wacom tablet, pan with middle mouse button
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xsetwacom --set "Wacom Intuos BT M Pen stylus" Button 2 "pan"
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xsetwacom --set "Wacom Intuos BT M Pen stylus" "PanScrollThreshold" 40

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# Wcaom tablet, press&click to work
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xsetwacom --set "Wacom Intuos BT M Pen stylus" TabletPCButton "on"

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" When editing a file, always jump to the last known cursor position.
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" Don't do it when the position is invalid, when inside an event handler
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" (happens when dropping a file on gvim) and for a commit message (it's
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" likely a different one than last time).
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autocmd BufReadPost *
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  \ if line("'\"") >= 1 && line("'\"") <= line("$") && &ft !~# 'commit'
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  \ |   exe "normal! g`\""
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  \ | endif

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# 1. check drive useage
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$ df -h
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# 2. check current kernel version
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$ uname -r
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# 3. list all the installed kernel packages
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$ dpkg -l | grep linux-image
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# 4. remove useless kernel packages
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$ apt remove --purge linux-image-*.**.*-**-generic
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# 5. clean up the dependencies of removed kernel packages
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$ apt autoremove --purge

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mkdir -p $HOME/.config/environment.d
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echo "IBUS_USE_PORTAL=1" > $HOME/.config/environment.d/99-ibus-use-portal.conf

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echo "IBUS_USE_PORTAL=1" > $HOME/.pam_environment

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# 1. :(
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[FAILED] Failed to start Load Kernel Modules.
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[FAILED] Failed to mount /boot/efi.
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[DEPEND] Dependency failed for Local File Systems.
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# 2. "journalctl -xb"
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mount: /boot/efi: unknown filesystem type 'vfat'.
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boot-efi.mount: Mount process exited, code=exited, status=32/n/a
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boot-efi.mount: Fialed with result 'exit-code'.
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Failed to mount /boot/efi.
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Dependency failed for Local File Systems.
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Failed to look up module alias 'crypto_user': Function not implemented
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Failed to look up module alias 'sg': Function not implemented
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Failed to look up module alias 'msr': Function not implemented
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Failed to look up module alias 'vboxdrv': Function not implemented
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Failed to look up module alias 'vboxnetadp': Function not implemented
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Failed to look up module alias 'vboxnetflt': Function not implemented
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Failed to look up module alias 'uinput': Function not implemented
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Failed to look up module alias 'vboxguest': Function not implemented
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Failed to look up module alias 'vboxsf': Function not implemented
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Failed to look up module alias 'vboxvideo': Function not implemented
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systemcd-modules-load.service: Failed with result 'exit-code'.
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Failed to start Load Kernel Modules.

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# output nothing shows that BBR is off
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lsmod | grep bbr

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# By default, Linux uses the Reno and CUBIC congestion control algorithm. To check available congestion control algorithms, run the following command:
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sysctl net.ipv4.tcp_available_congestion_control
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# Output:
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net.ipv4.tcp_available_congestion_control = cubic reno
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# To check the current congestion control algorithm in use, run:
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sysctl net.ipv4.tcp_congestion_control
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# Output:
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net.ipv4.tcp_congestion_control = cubic

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vim /etc/sysctl.d/local-bbr.conf
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# add following two lines
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net.core.default_qdisc=fq
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net.ipv4.tcp_congestion_control=bbr
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# apply change by
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deb-systemd-invoke restart procps.service

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# install packages
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sudo pacman -S nvidia-utils lib32-nvidia-utils linux59-nvidia
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# block nouveau
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vim /etc/modprobe.d/blacklist-nvidia-nouveau.conf
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# add following lines
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blacklist nouveau
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options nouveau modeset=0
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# reboot

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# 1. creat partition
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parted /dev/sdb
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(parted) mklabel gpt
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(parted) mkpart
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File system type? ext4
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Start? 1
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End? 5000
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# the Unit of End is "MB"
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# 2. build filesystem
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mkfs.ext4 /dev/sdb1
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# 3. mount it

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pacman-mirrors -id

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org.kde.klipper.klipper.clearClipboardContents
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org.kde.klipper.klipper.clearClipboardHistory
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org.kde.klipper.klipper.getClipboardContents
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org.kde.klipper.klipper.getClipboardHistoryItem
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org.kde.klipper.klipper.getClipboardHistoryMenu
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org.kde.klipper.klipper.saveClipboardHistory
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org.kde.klipper.klipper.setClipboardContents
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org.kde.klipper.klipper.showKlipperManuallyInvokeActionMenu
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org.kde.klipper.klipper.showKlipperPopupMenu

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# replace "file" with "photo"
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rename file photo *.png
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# rename multi files within Vim
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qmv -e vim

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# chroot
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manjaro-chroot -a
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# The first updates the system.
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# Second command rebuilds initramfs for all installed kernels.
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# Third command updates grub, so that entries for all the kernels are up to date.
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pacman -Syu
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mkinitcpio -P
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update-grub
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# remove a not valid kernel module
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# Check what you got under /use/lib/modules. If no linux57-58 folders there, then you can remove related files in /boot and /etc/mkinitcpio.d manually. Otherwise, you need to uninstall linux57-58 with pacman.

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journalctl -b --no-hostname --no-pager -u NetworkManager
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# Check journalctl
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# NetworkManager: <info>   device (enp): state change: unavailable -> disconnected (reason 'carrier-changed', sys-iface-state: 'managed')
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# As this post "Ethernet connection randomly disconnects, “reason: ‘carrier-changed”"
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# The reaseon is my wired cable...
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# And that's right, really a hardware problem...
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# Try another port on switch, restart NetworkManager, and everything OK...
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systemctl restart NetworkManager.service

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# First, remove local cached keyring files
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sudo rm -r /etc/pacman.d/gnupg
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# Then initialize the pacman keyring
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sudo pacman-key --init
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# Populate the keyrings (not sure whether necessary)
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sudo pacman-key --populate manjaro archlinux

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update-desktop-database ~/.local/share/applications -v

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sudo update-desktop-database /usr/share/applications -v