arch linux: ntp added to sync time

wiki/games/lutris.md

@@ -1,7 +1,7 @@
 # Lutris
 
 [Lutris](https://lutris.net/) is a free and open source video game platform for
-Linux systems.
+[Linux](/wiki/linux/linux.md) systems.
 It features compatibility with [GOG](https://www.gog.com/),
 [Humble Bundle](https://humblebundle.com/),
 [Epic Games](https://www.epicgames.com/), [Steam](/wiki/games/steam.md) and many

wiki/linux/arch-linux/arch-linux.md

@@ -1,6 +1,7 @@
 # Arch Linux
 
-[Arch Linux](https://archlinux.org/) is a rolling-release, general-purpose Linux
+[Arch Linux](https://archlinux.org/) is a rolling-release, general-purpose
+[Linux](/wiki/linux/linux.md)
 distribution.
 Arch Linux uses the [pacman](./package_manager.md) package manager.
 The Arch User Repositories (AUR) features community-made packages that can be

wiki/linux/arch-linux/installation.md

@@ -101,31 +101,18 @@ Now the created filesystems will be mounted for the installation.
 - `mount /dev/sda1 /mnt/boot` - Mount EFI partition
 - `swapon /dev/mapper/main-swap` - Mounting swap partition
 
-## 6. Prepare base installation (optional)
-
-In this step the country specific mirrorserver for the installation will be configured.
-This will improve the download speed.
-
-- `cp /etc/pacman.d/mirrorlist /etc/pacman.d/mirrorlist.bak` - Create a backup
-  of mirrorlist
-- `grep -E -A 1 ".*Germany.*$" /etc/pacman.d/mirrorlist.bak | sed '/--/d' > /etc/pacman.d/mirrorlist`
-- Example command to only use _German_ mirrors
-- `cat /etc/pacman.d/mirrorlist` - Check if the file is to your liking. If it is
-  not, you can just recover by using `mirrorlist.bak`
-
-## 7. Starting base installation
+## 6. Starting base installation
 
 Now you need a working internet connection.
 Plug in your lan cable or use `wifi-menu` to get a wireless connection.
 
-- `pacstrap /mnt base base-devel dosfstools gptfdisk lvm2 linux linux-firmware vim networkmanager`
-- Installation of main system with needed tools
+- `pacstrap /mnt base base-devel dosfstools gptfdisk lvm2 linux linux-firmware vim networkmanager ntp`
 - `genfstab -Up /mnt > /mnt/etc/fstab` - creation of fstab
 - `arch-chroot /mnt` - Switch into the newly installed system
 - `echo ArchLinux > /etc/hostname` - Assign hostname. `ArchLinux` can be changed
   for any name of your preference.
 
-## 8. Set Region and Language
+## 7. Set Region and Language
 
 - `echo LANG=en\_US.UTF-8 > /etc/locale.conf` - Assign system Language to be
   english (you can use other languages, look into the `/etc/locale.gen` for a list of all available languages)
@@ -139,14 +126,13 @@ en_US.UTF-8 UTF-8
 
 - `locale-gen` - Generate languages
 - `echo KEYMAP=de-latin1-nodeadkeys > /etc/vconsole.conf` - set the keymap
-- `cp /usr/share/zoneinfo/Europe/Berlin /etc/localtime` - set your timezone
+- `ln -sf  /usr/share/zoneinfo/Europe/Berlin /etc/localtime` - set your timezone
   (select the first file accordingly to your location)
-- `date +%Y%m%d -s "<yyyymmdd>"` - set the current date (change
-  values accordingly)
-- `date +%T -s "<hh:mm:ss>"` - set the current time (change values accordingly)
-- `hwclock -w` - sync the current date and time with the hardware clock
+- `ntpdate -q 0.de.pool.ntp.org` - sync the time and date with
+  [NTP](/wiki/linux/ntp.md) (note that a german time server is used and
+  depending on the needs a adjustments should be made)
 
-## 9. Configure and create kernel-image
+## 8. Configure and create kernel-image
 
 - `vim /etc/mkinitcpio.conf`
 
@@ -157,12 +143,10 @@ en_US.UTF-8 UTF-8
 
 - `mkinitcpio -p linux` - generate Kernel-Image
 
-## 10. Install and configure UEFI bootloader
+## 9. Install and configure UEFI bootloader
 
 - `bootctl install` - Prepare bootloader
-- `ls -l /dev/disk/by-uuid` - find out the UUID
-- `lsblk -no UUID /dev/sda2 | head -n1 > /boot/loader/entries/arch.conf` - print
-  the UUID in your configuration file
+- `ls -l /dev/disk/by-uuid` - find out the UUID of your root partition
 - `vim /boot/loader/entries/arch.conf` - Create configuration
 
   - Change the config to look similar to this:
@@ -174,8 +158,8 @@ en_US.UTF-8 UTF-8
     options  cryptdevice=UUID=<enter your uuid here>:lvm:allow-discards root=/dev/mapper/main-root resume=/dev/mapper/main-swap rw quiet
     ```
 
-- `cp /boot/loader/entries/arch.conf /boot/loader/entries/arch-fallback.conf`
-- Create a fallback
+- `cp /boot/loader/entries/arch.conf /boot/loader/entries/arch-fallback.conf` -
+  create a fallback
 - `vim /boot/loader/loader.conf` - Create loader configuration
 
   - Insert the following text
@@ -185,12 +169,12 @@ en_US.UTF-8 UTF-8
     default arch
     ```
 
-## 11. Finishing base installation
+## 10. Finishing base installation
 
 - `passwd` - set password for the root account
 - `systemctl enable NetworkManager.service`
 
-## 12. Finish the setup
+## 11. Finish the setup
 
 - `exit` - exit the installed system
 - `umount /mnt/{boot,}` - unmount all partitions
@@ -201,7 +185,7 @@ en_US.UTF-8 UTF-8
 If the system is installed in a virtual environment or a system with deactivated
 UEFI, don't forget to enable the EFI option, otherwise the system won't boot.
 
-## 13. Further steps and graphical environment
+## 12. Further steps and graphical environment
 
 Now you can follow the recommended larbs installation script of this wiki
 (`curl -o larbs.sh https://raw.githubusercontent.com/tiyn/larbs/master/larbs.sh`)

wiki/linux/linux.md

@@ -0,0 +1,14 @@
+# Linux
+
+Linux is a family of open-source operating systems that are based on the kernel
+with the same name.
+Linux based operating systems are Unix-like.
+
+## Distributions
+
+The different operating systems that are based on the Linux kernel are called
+distributions.
+
+- [Arch Linux](/wiki/linux/arch-linux/arch-linux.md) is a rolling-release
+  distribution whose base system is as minimal and needs heavy user
+  configuration.

wiki/linux/ntp.md

@@ -0,0 +1,26 @@
+# NTP
+
+[NTP](https://www.rfc-editor.org/rfc/rfc5905) - short for Network Time Protocol
+- is the most common method to synchronize the software clock of a
+[Linux](/wiki/linux/linux.md) system.
+
+## Setup
+
+NTP can be installed on most distributions by installing the
+`ntp` package.
+
+## Usage
+
+The following section describes the usage of the NTP package.
+
+### Synchronize Time once
+
+For one time synchronization of the time and date the `ntpdate` command can be
+used.
+The following command is an example for a one time sync.
+Note that the server has to be changed for different time zones.
+In this case a german time server is used.
+
+```sh
+ntpdate -q 0.de.pool.ntp.org
+```

wiki/windows/windows.md

@@ -0,0 +1,28 @@
+# Windows
+
+[Windows](https://windows.com/) is an operating system developed by
+[Microsoft](https://www.microsoft.com/).
+
+## Telemetry
+
+Windows has a `Windows Compatibility Telemetry` process running in the
+background.
+To disable it follow this
+[guide](https://answers.microsoft.com/en-us/windows/forum/windows_10-performance/permanently-disabling-windows-compatibility/6bf71583-81b0-4a74-ae2e-8fd73305aad1):
+
+- Start the `Task Scheduler`
+- In the `Task Scheduler` navigate to the path
+  `Task Scheduler Library\Microsoft\Windows\Application Experience`
+- Look for the `Microsoft Compatibility Appraiser` on the `Application Experience`
+  folder, right-click it and select `Disable`.
+
+## Make Windows compatible with UTC
+
+Making Windows use UTC can be useful for dual-boot systems.
+This can be done by running the following command in the Windows command prompt.
+
+```txt
+reg add "HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\TimeZoneInformation" /v RealTimeIsUniversal /d 1 /t REG_DWORD /f
+```
+
+Disabling of UTC time is done with the same command with a `0` instead of a `1`.

wiki/windows10/windows10.md

@@ -1,15 +0,0 @@
-# Windows 10
-
-[Windows 10](https://windows.com/) is an operating system developed by
-[Microsoft](https://www.microsoft.com/).
-
-## Telemetry
-
-Windows 10 has a `Windows Compatibility Telemetry` process running in the background.
-To disable it follow this [guide](https://answers.microsoft.com/en-us/windows/forum/windows_10-performance/permanently-disabling-windows-compatibility/6bf71583-81b0-4a74-ae2e-8fd73305aad1):
-
-- Start the `Task Scheduler`
-- In the `Task Scheduler` navigate to the path
-`Task Scheduler Library\Microsoft\Windows\Application Experience`
-- Look for the `Microsoft Compatibility Appraiser` on the `Application Experience`
-folder, right-click it and select `Disable`.