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Update my notes on stuff Some CLI tools, also forgot to commit to move the exercise solutions of SICP where it should be. The usual hierarchy notebook update.
2021-05-31 15:37:32 +00:00
#+title: Network configuration in Linux
#+date: "2021-05-31 13:07:38 +08:00"
Update notes on the Cloud native computing course
2021-06-21 02:56:10 +00:00
#+date_modified: "2021-06-20 20:20:51 +08:00"
Update my notes on stuff Some CLI tools, also forgot to commit to move the exercise solutions of SICP where it should be. The usual hierarchy notebook update.
2021-05-31 15:37:32 +00:00
#+language: en
# TODO: Incomplete info, missing fragments.
# Improve the note later, pls.
To access the internet, you need the following components:
- The driver of the network device installed and enabled.
Update notes on the Cloud native computing course
2021-06-21 02:56:10 +00:00
(See [[id:a7d9897e-fbaa-4ab1-a26d-4a86d2621df8][Linux drivers]] for more details.)
Update my notes on stuff Some CLI tools, also forgot to commit to move the exercise solutions of SICP where it should be. The usual hierarchy notebook update.
2021-05-31 15:37:32 +00:00
- A network manager to manage your network devices ;p
- A DNS resolver to access domain names which are aliases to IP addresses.
* Network manager configuration
With a systemd-ful environment, you can run the network daemon (i.e., =systemd-networkd=).
Update notes on the Cloud native computing course
2021-06-21 02:56:10 +00:00
Once enabled, you can run =networkctl= to list all of the network devices. [fn:: You can also run ~ip address~ for it.]
Update my notes on stuff Some CLI tools, also forgot to commit to move the exercise solutions of SICP where it should be. The usual hierarchy notebook update.
2021-05-31 15:37:32 +00:00
Update notes on the Cloud native computing course
2021-06-21 02:56:10 +00:00
#+begin_src shell :cache yes
Update my notes on stuff Some CLI tools, also forgot to commit to move the exercise solutions of SICP where it should be. The usual hierarchy notebook update.
2021-05-31 15:37:32 +00:00
networkctl
#+end_src
Update notes on the Cloud native computing course
2021-06-21 02:56:10 +00:00
#+results[84c83a400d07ef38e6813bc9ce677cef8a38bd66]:
Update my notes on stuff Some CLI tools, also forgot to commit to move the exercise solutions of SICP where it should be. The usual hierarchy notebook update.
2021-05-31 15:37:32 +00:00
: IDX LINK TYPE OPERATIONAL SETUP
: 1 lo loopback carrier unmanaged
Update notes on the Cloud native computing course
2021-06-21 02:56:10 +00:00
: 2 enp1s0 ether routable configured
Update my notes on stuff Some CLI tools, also forgot to commit to move the exercise solutions of SICP where it should be. The usual hierarchy notebook update.
2021-05-31 15:37:32 +00:00
: 3 wlan0 wlan routable configured
:
: 3 links listed.
To configure network manager, you can create a network file in one of systemd unit file paths in the system.
Each of the device will be assigned an IP address.
You can either assign an IP address or dynamically assign them in some way.
One of the common ways to do dynamic IP addresses is installing a DHCP server (which is another thing to be configured).
Here's an example of configuring any wireless devices and assigning a dynamic IP addresses with [[https://wiki.archlinux.org/title/Network_configuration#DHCP][DHCP]].
#+begin_src
[Match]
Type=wlan
[Network]
DHCP=yes
IPv6PrivacyExtensions=yes
[DHCPv4]
RouteMetric=1024
[DHCPv6]
RouteMetric=1024
#+end_src
* DNS server configuration
While the network manager is enabled, you can access the internet.
Update notes on the Cloud native computing course
2021-06-21 02:56:10 +00:00
But only with raw IP addresses (e.g., 1.1.1.1 from Cloudflare, 93.174.95.27 for Library Genesis). [fn:: You can find the IP addresses with DNS clients such as [[https://github.com/ogham/dog][dog]] or the [[https://nodejs.org/api/dns.html][DNS library from NodeJS]].]
Update my notes on stuff Some CLI tools, also forgot to commit to move the exercise solutions of SICP where it should be. The usual hierarchy notebook update.
2021-05-31 15:37:32 +00:00
Accessing the domain names as you would browse the web normally is an additional layer of the web.
To access a domain name, you need a DNS client that can resolve them.
While there are plenty of DNS resolvers, systemd has a component =systemd-resolved= which you can control with =resolvectl= binary.
systemd-resolved takes a configuration from =/etc/resolve.conf= which most third-party programs also relies on.
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