電腦使用Android的網路
sudo pacman -S usb_modeswitch
手機開啟網路共享
Android使用usb連線電腦網路
yay -S gnirehte
gnirehtet run
Android 投屏到電腦
sudo pacman -S scrcpy
scrcpy
Plasma KDE Screen Locking Picture of the Day 每日一圖的圖片快取位置
~/.cache/plasma_engine_potd
Where is Bing's Picture of the Day stored on my system?
Gwenview支援avif格式圖片
sudo pacman -S kimageformats shared-mime-info libavif
EXT4 分割槽修復
檢查檔案系統並在發現任何錯誤時進行修復
umount /dev/sdb3
e2fsck -p /dev/sdb3
NTFS硬碟無法開啟
fdisk -l # 檢視硬碟名稱
sudo mount -t ntfs3 /dev/sdc1 /mnt
# 報錯
mount: /mnt: wrong fs type, bad option, bad superblock on /dev/sdc1, missing codepage or helper program, or other error.
dmesg(1) may have more information after failed mount system call.
#修復
sudo ntfsfix -d /dev/sdc1
sudo mount -t ntfs3 /dev/sdc1 /mnt
配置DNS
建立修改配置檔案
vim /etc/NetworkManager/conf.d/01-dns.conf
加入以下兩行，防止NetworkManager修改resolv.conf檔案
[main]
dns=none
修改隱藏許可權，去掉只讀
lsattr /etc/resolv.conf
chattr -i /etc/resolv.conf
vim /etc/resolv.conf
加入以下兩行
nameserver 223.5.5.5 # 阿里巴巴
nameserver 223.6.6.6 # 阿里巴巴
nameserver 8.8.8.8
nameserver 8.8.4.4
systemctl restart NetworkManager
chattr +i /etc/resolv.conf # 加上只讀隱藏許可權
lsattr /etc/resolv.conf
使用DOH 加密DNS
pacman -S dns-over-https
修改hosts順序
vim /etc/nsswitch.conf
hosts: myhostname mymachines resolve [!UNAVAIL=return] files dns
配置DOH客戶端
vim /etc/dns-over-https/doh-client.conf
修改
upstream_selector = "weighted_round_robin"
增加DOH地址
[[upstream.upstream_ietf]]
url = "https://223.5.5.5/dns-query"
weight = 50
修改 /etc/resolv.conf 檔案
nameserver ::1
nameserver 127.0.0.1
options edns0 single-request-reopen
設定開機自啟並立即啟動
sudo systemctl start doh-client.service
sudo systemctl enable --now doh-client.service
sudo systemctl status doh-client.service # 服務的狀態
sudo systemctl restart doh-client.service
sudo systemctl is-enabled doh-client.service #是否開機時啟動
sudo systemctl list-units --type=service #檢視系統中所有正在執行的服務以及它們的狀態
檢視是否生效
pacman -S dnsutils
nslookup www.baidu.com # 顯示是本地IP則已經生效
Server: ::1
Address: ::1#53
在 Arch Linux 使用 DOH 來加密你的 DNS
pacman -Syu時，error: could not open file /var/lib/pacman/local/cemu-2.0.439-2/files: No such file or directory
ls檢視此目錄顯示cannot access 'desc': Structure needs cleaning。
用一下方法：
sudo rm -r /var/lib/pacman/local/cemu-2.0.439-2
sudo pacman -S --dbonly cemu
不行再嘗試以下：
$df -h
/dev/sdb3 12G 2.0G 9.2G 18% /var
## 備份sdb3
dd if=/dev/sdb3 of=/path/to/backup.img bs=1M
# 重啟系統，進入命令介面
$umount /dev/sdb3 # 解除安裝
$fsck.ext4 /dev/sdb3 -y # 修復
# 重啟檢視，若進入系統有問題，需要恢復備份
$dd if=/path/to/backup.img of=/dev/sdb3 bs=1M
Linux備份與恢復的命令和使用方式：保障資料安全和業務連續性
[問題] Wifi連線時間長，wifi連線時斷時連
由於iwd和NetworkManager連線網路產生了衝突，進行以下操作並重啟
systemctl list-unit-files # 檢視iw是否開啟
# 下面顯示都開啟，需要關閉iwd
iwd.service enable disabled
NetworkManager.service enabled disabled
# 確保iwd開機處於關閉狀態
sudo systemctl disable iwd
# 立即關閉iwd
sudo systemctl stop iwd
# 啟動NetworkManager
sudo systemctl enable --now NetworkManager
Arch配置安裝使用
[問題] wine啟動某些應用，後臺沒報錯，介面不顯示
去WineHQ檢視相關應用說明，檢視是否需要安裝元件或字型
$ winetricks mfc42
$ winetricks droid
[問題] wine報錯winediag:ntlm_check_version ntlm_auth was not found. Make sure that ntlm_auth >= 3.0.25 is in your path. Usually, you can find it in the winbind package of your distribution.
pacman -S samba
[問題]service:scmdatabase_autostart_services Auto-start service L"WineBus" failed to start: 105
How to prevent Wine from launching native mono apps?
$ xdg-mime query default application/x-ms-dos-executable
[問題]wine執行exe時報錯誤 [VGL] ERROR: Could not open display :8
使用以下命令執行
optirun bash -c "wine [your game] && wineserver -w"
[VGL] ERROR: Could not open display :8 if a program forks and exits optirun #42
[問題] ArchLinux下開啟MagicSysRq組合鍵
用於系統完全當機時，重新啟動計算機
Alt+SysRq+REISUB，簡單記憶為「Reboot Even If System Utterly Broken」
開啟方法：
以下程式碼寫入檔案：/etc/sysctl.d/99-sysctl.conf
kernel.sysrq = 1
然後過載系統所有配置或者僅過載 /etc/sysctl.d/99-sysctl.conf 配置檔案：
sudo sysctl --system
sudo sysctl --load=/etc/sysctl.d/99-sysctl.conf
參考
[問題]pacman 設定代理
export http_proxy="..."
export https_proxy="..."
sudo -E pacman -Syu
# 或者修改 /etc/sudoers
Defaults env_keep += "ftp_proxy http_proxy https_proxy no_proxy"
參考
[問題]pacman 更新失敗後，啟動報錯
大機率是連線伺服器更新失敗
1、 sudo pacman -Syu 更新時大量報錯
==> ERROR: module not found: 'usbhid'
==> ERROR: module not found: xxxx
==> WARNING: No modules were added to the image. This is probably not what you want.
解決：不要重啟，需要重新執行命令
sudo pacman -S linux #重灌linux
sudo mkinitcpio -P linux #重新生成映象
2、重啟後報錯
mount: /new_root:unknown filesystem type 'ext4'.
dmesg(1) may have more information after failed mount system call.
You are new being dropped into an emergency shell.
sh: can`t access tty; job control turned off
檢視pacman日誌
...
creating zstd-compressed initcpio image: '/boot/initramfs-linux-faillback.img'
WARNING: No modules were added to the image.This is probably not what you want.
Running build hook:[fsck]
ERROR: module not found: 'ps2mult'
ERROR: module not found: 'ps2_gpio'
...
解決：
若已經進不去系統，則用Live CD啟動linux
# 1.連線網路
iwctl #執行iwctl命令，進入互動式命令列
device list #列出裝置名，比如無線網路卡看到叫 wlan0
station wlan0 scan #掃描網路
station wlan0 get-networks #列出網路 比如想連線YOUR-WIRELESS-NAME這個無線
station wlan0 connect YOUR-WIRELESS-NAME #進行連線 輸入密碼即可
exit #成功後exit退出
# 2.根據系統情況掛在目錄
mount /dev/sdb2 /mnt
mount /dev/sda1 /mnt/efi
mount /dev/sda3 /mnt/var
mount /dev/sda4 /mnt/home
# 3.重新安裝linux
arch-chroot /mnt
pacman -S linux
若不行可以降級系統，去/var/cache/pacman/pkg 尋找舊的安裝包，命令例如：
># pacman -U linux-3.5.6-1-x86_64.pkg.tar.xz linux-headers-3.5.6-1-x86_64.pkg.tar.xz virtualbox-host-modules-4.2.0-5-x86_64.pkg.tar.xz
[問題]系統報 Failed to create sink input: sink is suspended 錯誤
應該是由於PulseAudio的問題導致，建議直接用新一代PipeWire替換掉PulseAudio和Jack即可解決。
# 1.關掉，禁用pulseaudio的服務和socket
$ systemctl --user stop pulseaudio.{service,socket}
$ systemctl --user disable pulseaudio.{service,socket}
# 2.安裝
$ pacman -S pipewire pipewire-pulse pipewire-jack #選裝 pipewire-alsa
$ pacman -S wireplumber # 會話管理器
# 3.啟動
$ systemctl --user start pipewire pipewire-pulse
使用PipeWire取代PulseAudio
[問題]密碼忘記或誤修改檔案導致無法登入系統
1，GNU GRUB version中選中Arch Linux
2，按e鍵進入修改介面
3，在linux /boot/vmlinuz-linux 一行末尾加入 init =/bin/bash
4，按ctrl+x或F10，進入單使用者模式
5，此時已經可以修改檔案，去將誤修改的檔案還原即可
6，重新以讀寫的方式掛載根檔案系統
# mount -n -o remount,rw /
7，修改root密碼
# passwd
‘password updated successfully’.
8，最後，執行下面的命令來儲存更改並啟動ArchLinux。
# exec /sbin/init
原帖
[問題]系統hibernate後喚醒時畫面卡死，有時需要等待幾分鐘後才能操作，或一直卡死
lsblk -f # 檢視根目錄/的UUID
配置GRUB_CMDLINE_LINUX_DEFAULT，加入
root=UUID=0a3407de-014b-458b-b5c1-848e92a327a3
/etc/default/grub完整如下：
GRUB_CMDLINE_LINUX_DEFAULT="loglevel=5 nowatchdog root=UUID=560a74f2-582b-45c8-99c7-5572e592e263 resume=UUID=560a74f2-582b-45c8-99c7-5572e592e263 resume_offset=745472"
Hibernate doesn't work after hibernate
Persistent block device naming
[問題]解除安裝optimus-manager後，無法進入kde
yay -Rns optimus-manager optimus-manager-qt # 解除安裝optimus-manager
將/etc/X11/xorg.conf刪除
[問題] 睡眠後喚醒時卡死，顯示以下資訊
ata6.00: supports DRM functions and may not be fully accessible
ata1.00: ATA identify device log not supported
用lspci檢視
04:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTL8411B PCI Express Card Reader (rev 01)
...
ModuleNotFoundError: No module named 'optimus_manager'
/usr/lib/systemd/system-sleep/optimus-manager.py failed with exit status 1.
最後發現是因為optimus-manager導致，解除安裝optimus-manager，安裝bumblebee後恢復正常
ArchLinux安裝
Trouble mounting microSD card
ArchLinux無法正常休眠或掛起
Realtech PCI Card Reader HOW TO
Card Reader RTL8411B
Startx - AddScreen/ScreenInit Faild - Asus N76V - GT 650M
[問題] 桌面崩潰，黑屏後重啟
killall plasmashell # 殺死程序
kstart5 plasmashell # 開啟程序
kquitapp5 plasmashell # 退出桌面
[問題] error while loading shared libraries: libpcap.so.0.8:cannot open shared object file: No such file or directory
issues/98
$ locate libpcap
/usr/lib64/libpcap.so <-- was one among many results for me
$ cd /usr/lib64/ # go to that directory
$ sudo ln -s libpcap.so libpcap.so.0.8 # create a symlink to libpcap.so.0.8 from libpcap.so (or whatever you actually have instead)
$ cd - # go back to your bettercap directory
[問題]系統hibernate後休眠時無法切斷電源的問題
修改/etc/systemd/sleep.conf檔案，開啟HibernateMode的註釋，值設為shutdown
[Sleep]
# A fix for unable to poweroff after hibernation
# HibernateMode= plantform shutdown
HibernateMode=shutdown
解決 systemd 休眠時無法切斷電源的問題
Arch Wiki - System does not power off when hibernating