Ubuntu/Bespin/TIL - Revision history

Unknown user at 23:52, 7 July 2020

2020-07-07T23:52:13Z

← Older revision		Revision as of 23:52, 7 July 2020
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			{{Main\|Ubuntu/Bespin}}

	This page is the list of "today I learned" things that I learned while setting up a desktop Ubuntu 18.04 server.		This page is the list of "today I learned" things that I learned while setting up a desktop Ubuntu 18.04 server.

Unknown user at 23:51, 7 July 2020

2020-07-07T23:51:51Z

← Older revision		Revision as of 23:51, 7 July 2020
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	* In 18.04, ubuntu changed the way network interfaces are named, so the mac address is hard-coded in the device name		* In 18.04, ubuntu changed the way network interfaces are named, so the mac address is hard-coded in the device name
	* There is all kinds of shit in <code>/etc/network/iface-up.d/</code> - it is a directory containing a bunch of scripts, each script is run once each time an interface is brought up. same thing with if-down and if-post-down and etc.		* There is all kinds of shit in <code>/etc/network/iface-up.d/</code> - it is a directory containing a bunch of scripts, each script is run once each time an interface is brought up. same thing with if-down and if-post-down and etc.
	* You can use any IP in the range 127.0.0.0/8 as a loopback IP address.		* You can use any IP in the range 127.0.0.0/8 as a loopback IP address. Add up and down commands to the loopback entry in <code>/etc/network/interfaces</code>. See [https://askubuntu.com/a/1158080]
	* The IP addresses in <code>/etc/resolv.conf</code> that contain upstream nameservers have port 53 hard-coded, so there's no way to run multiple DNS servers on different ports. Instead, you can run different DNS servers on unusual loopback IP addresses, and access them that way.		* The IP addresses in <code>/etc/resolv.conf</code> that contain upstream nameservers have port 53 hard-coded, so there's no way to run multiple DNS servers on different ports. Instead, you can run different DNS servers on unusual loopback IP addresses, and access them that way.

Unknown user: /* Networking */

2020-07-07T23:42:51Z

Networking

← Older revision		Revision as of 23:42, 7 July 2020
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	* In 18.04, ubuntu changed the way network interfaces are named, so the mac address is hard-coded in the device name		* In 18.04, ubuntu changed the way network interfaces are named, so the mac address is hard-coded in the device name
	* There is all kinds of shit in <code>/etc/network/iface-up.d/</code> - it is a directory containing a bunch of scripts, each script is run once each time an interface is brought up. same thing with if-down and if-post-down and etc.		* There is all kinds of shit in <code>/etc/network/iface-up.d/</code> - it is a directory containing a bunch of scripts, each script is run once each time an interface is brought up. same thing with if-down and if-post-down and etc.
			* You can use any IP in the range 127.0.0.0/8 as a loopback IP address.
			* The IP addresses in <code>/etc/resolv.conf</code> that contain upstream nameservers have port 53 hard-coded, so there's no way to run multiple DNS servers on different ports. Instead, you can run different DNS servers on unusual loopback IP addresses, and access them that way.




	[[Category:Ubuntu]]		[[Category:Ubuntu]]

Unknown user: /* Networking */

2020-07-07T04:21:12Z

Networking

← Older revision		Revision as of 04:21, 7 July 2020
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	* Ubuntu 18.04 server runs a stub dns server - resolv.conf, and the systemd-ressolved service - and it is extremely confusing because turning it off can disable the internet. So don't just go around deleting stuff!		* Ubuntu 18.04 server runs a stub dns server - resolv.conf, and the systemd-ressolved service - and it is extremely confusing because turning it off can disable the internet. So don't just go around deleting stuff!
	* In 18.04, ubuntu changed the way network interfaces are named, so the mac address is hard-coded in the device name		* In 18.04, ubuntu changed the way network interfaces are named, so the mac address is hard-coded in the device name
			* There is all kinds of shit in <code>/etc/network/iface-up.d/</code> - it is a directory containing a bunch of scripts, each script is run once each time an interface is brought up. same thing with if-down and if-post-down and etc.

	[[Category:Ubuntu]]		[[Category:Ubuntu]]

Unknown user: /* Networking */

2020-07-05T17:47:22Z

Networking

← Older revision		Revision as of 17:47, 5 July 2020
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	* Network manager is a surprisingly difficult service to stop		* Network manager is a surprisingly difficult service to stop
	* Ubuntu 18.04 server runs a stub dns server - resolv.conf, and the systemd-ressolved service - and it is extremely confusing because turning it off can disable the internet. So don't just go around deleting stuff!		* Ubuntu 18.04 server runs a stub dns server - resolv.conf, and the systemd-ressolved service - and it is extremely confusing because turning it off can disable the internet. So don't just go around deleting stuff!
	*		* In 18.04, ubuntu changed the way network interfaces are named, so the mac address is hard-coded in the device name

Unknown user: /* Gnome */

2020-07-05T17:06:42Z

Gnome

← Older revision		Revision as of 17:06, 5 July 2020
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	* Gnome is highly configurable, but the GUI gives zero control over those settings.		* Gnome is highly configurable, but the GUI gives zero control over those settings.
	* Gnome themes are just files living in <code>/usr/share/themes</~~ode~~>		* Gnome themes are just files living in <code>/usr/share/themes</code>
	* More themes available online		* More themes available online

Unknown user: Created page with "This page is the list of "today I learned" things that I learned while setting up a desktop Ubuntu 18.04 server. ==Gnome== * Gnome is highly configurable, but the GUI gives..."

2020-07-05T17:06:33Z

Created page with "This page is the list of "today I learned" things that I learned while setting up a desktop Ubuntu 18.04 server. ==Gnome== * Gnome is highly configurable, but the GUI gives..."

New page

This page is the list of "today I learned" things that I learned while setting up a desktop Ubuntu 18.04 server.

==Gnome==

* Gnome is highly configurable, but the GUI gives zero control over those settings.
* Gnome themes are just files living in <code>/usr/share/themes</ode>
* More themes available online

==Networking==

* Debian (Raspberry Pi, Kali) comes with dhcpcd baked in
* Ubuntu comes with dhclient baked in
* Difference between dhcpcd and dhclient? dhclient is older, provided by ISC, serves as a reference; dhcpcd is newer and more lightweight
* Network manager is a surprisingly difficult service to stop
* Ubuntu 18.04 server runs a stub dns server - resolv.conf, and the systemd-ressolved service - and it is extremely confusing because turning it off can disable the internet. So don't just go around deleting stuff!
*

[[Category:Ubuntu]]
[[Category:Linux]]
[[Category:Unix]]
[[Category:Machine]]
[[Category:Bespin]]