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Note per troubleshooting

·444 words·3 mins
Table of Contents

Introduzione #

Qui mettero delle note personali per evitare di ritrovarmi sempre con gli stessi problemi (principalmente arch linux).

Config #

Wireless #

Bluetooth #

coexistence modules #

This solve some glitches with bluetooth headphones.

Arch Wiki: Network_configuration/Wireless - Bluetooth_coexistence

/etc/modprobe.d/iwlwifi.conf

options iwlwifi bt_coex_active=0

Networking #

Fail2ban #

wiki.archlinux.org/title/Fail2ban

sudo systemctl enable fail2ban.service

SSH ban #

www.linode.com/docs/guides/how-to-use-fail2ban-for-ssh-brute-force-protection/

/etc/fail2ban/jail.local

[sshd]
enabled = true
port = ssh
filter = sshd
logpath = /var/log/auth.log
maxretry = 3
findtime = 300
bantime = 3600
ignoreip = 127.0.0.1

SSH multi-port disable password #

unix.stackexchange.com/questions/128444/disable-ssh-password-authentication-on-specific-interface /etc/ssh/sshd_config

Port 22
Port 2222
...
PasswordAuthentication no
Match address 192.168.213.0/24
	PasswordAuthentication yes

Udiskie2 mount password #

gist.github.com/grawity/3886114#file-udisks2-allow-mount-internal-js /etc/polkit-1/rules.d/60-udiskie.rules

polkit.addRule(function(action, subject) {
  var YES = polkit.Result.YES;
  var permission = {
    // required for udisks1:
    //"org.freedesktop.udisks.filesystem-mount": YES,
    "org.freedesktop.udisks.filesystem-mount-system-internal": YES,
    //"org.freedesktop.udisks.luks-unlock": YES,
    //"org.freedesktop.udisks.drive-eject": YES,
    "org.freedesktop.udisks.drive-detach": YES,
    // required for udisks2:
    //"org.freedesktop.udisks2.filesystem-mount": YES,
    "org.freedesktop.udisks2.filesystem-mount-system": YES,
    //"org.freedesktop.udisks2.encrypted-unlock": YES,
    //"org.freedesktop.udisks2.eject-media": YES,
    //"org.freedesktop.udisks2.power-off-drive": YES,
    // required for udisks2 if using udiskie from another seat (e.g. systemd):
    //"org.freedesktop.udisks2.filesystem-mount-other-seat": YES,
    //"org.freedesktop.udisks2.filesystem-unmount-others": YES,
    //"org.freedesktop.udisks2.encrypted-unlock-other-seat": YES,
    //"org.freedesktop.udisks2.eject-media-other-seat": YES,
    //"org.freedesktop.udisks2.power-off-drive-other-seat": YES
  };
  if (subject.isInGroup("storage")) {
    return permission[action.id];
  }
});

Pacman #

Beauty things #

/etc/pacman.conf

Color
VerbosePkgLists
ILoveCandy

Parallel downloads #

/etc/pacman.conf

ParallelDownloads = 15

Arch news hook #

github.com/bradford-smith94/informant

AUR package: informant

Pipewire #

Disable power save #

To prevent pops when music starts.

echo 0 > /sys/module/snd_hda_intel/parameters/power_save

To make it permanent add to /etc/modprobe.d/audio_disable_powersave.conf:

options snd_hda_intel power_save=0

Fish Shell #

Ctrl+Backspace kill word #

bind \b backward-kill-word

Remove fish greeting #

set -U fish_greeting ""

Kernel #

Sysrq #

echo "kernel.sysrq = 1" >> /etc/sysctl.d/99-sysctl.conf

Bootloader #

rEFInd #

Themes #

Installation #

wiki.archlinux.org/title/Installation_guide

Partitioning #

wiki.archlinux.org/title/Partitioning

LVM #

wiki.archlinux.org/title/LVM

Resizing with filesystem #

lvresize -L +10G --resizefs MyVolGroup/mediavol

lvresize -L 15G --resizefs MyVolGroup/mediavol

lvresize -l +100%FREE --resizefs MyVolGroup/mediavol

Checklist #

  • loadkeys colemak
  • iwctl
  • timedatectl set-ntp true
  • fdisk
  • mkfs.ext4/mkfs.fat -F 32/mkswap
  • mount/swapon
  • pacstrap /mnt base linux-zen linux-firmware base-devel nano micro neovim sudo man-db man-pages texinfo neofetch
  • genfstab -U /mnt >> /mnt/etc/fstab
  • arch-chroot /mnt
  • ln -sf /usr/share/zoneinfo/Europe/Rome /etc/localtime
  • hwclock --systohc
  • micro /etc/locale.gen
  • locale-gen
  • micro /etc/locale.conf -> LANG=en_US.UTF-8
  • micro /etc/vconsole.conf -> KEYMAP=colemak
  • micro /etc/hostname -> my hostname
  • mkinitcpio -P
  • passwd
  • Install bootloader
  • useradd (TODO)

Utilities #

Sync #

To view progress of sync command:

watch -d grep -e Dirty: -e Writeback: /proc/meminfo

unix.stackexchange.com/questions/48235/can-i-watch-the-progress-of-a-sync-operation

VirtualBox #

Import OVA #

VBoxManage import KaliTraining.ova

Gnome #

Alt-tab behavior #

superuser.com/questions/394376/how-to-prevent-gnome-shells-alttab-from-grouping-windows-from-similar-apps

  • Change alt-tab keybing from switch-application to switch-windows
  • Open dconf-editor
  • Uncheck org/gnome/shell/window-switcher/current-workspace-only

BTRFS #

btrbk snapshots (fedora) #

mutschler.dev/linux/fedora-btrfs-35/ /etc/btrbk/btrbk.conf

transaction_log         /var/log/btrbk.log
lockfile                /var/lock/btrbk.lock
timestamp_format        long

snapshot_dir            _btrbk_snap
snapshot_preserve_min   3h
snapshot_preserve       6h 5d 3w 1m

volume /
  snapshot_create  always
  subvolume /
  subvolume home

/lib/systemd/system/btrbk.timer

[Unit]
Description=btrbk hourly backup

[Timer]
OnCalendar=hourly
AccuracySec=10min
Persistent=true

[Install]
WantedBy=timers.target

sudo systemctl enable --now btrbk.timer