DNS on Ubuntu 18.04

Jovan Stosic July 16, 2021

For years it’s been simple to set up DNS on a Linux machine. Just add a couple of entries to /etc/resolv.conf and you’re done.

# Use Google's public DNS servers.
nameserver 8.8.4.4
nameserver 8.8.8.8

But things change and now it’s not that simple. If you now edit /etc/resolv.conf on Ubuntu you’ll find that the edits are ephemeral. If you restart (or even hibernate) your machine then they’ll be overwritten by default content.

nameserver 127.0.0.53
search Home

This is pretty simple to fix though.

  1. Install the resolvconf package.
sudo apt install resolvconf
  1. Edit /etc/resolvconf/resolv.conf.d/head and add the following:
# Make edits to /etc/resolvconf/resolv.conf.d/head.
nameserver 8.8.4.4
nameserver 8.8.8.8
  1. Restart the resolvconf service.
sudo service resolvconf restart

Fix should be permanent.

 

Source: DNS on Ubuntu 18.04 – datawookie

Via Panisperna boys

Jovan Stosic July 10, 2021

The Via Panisperna boys (Italian: I ragazzi di Via Panisperna) were a group of young scientists led by Enrico Fermi. In Rome in 1934, they made the famous discovery of slow neutrons which later made possible the nuclear reactor, and then the construction of the first atomic bomb.

The nickname of the group comes from the address of the Physics Institute, at the University of Rome La Sapienza. The Via Panisperna, a street of Rione Monti in the city center, got its name from a nearby monastery, San Lorenzo in Panisperna.

The other members of the group were Edoardo Amaldi, Oscar D’Agostino, Ettore Majorana, Bruno Pontecorvo, Franco Rasetti and Emilio Segrè. All of them were physicists, except for D’Agostino who was a chemist.

Source: Via Panisperna boys – Wikipedia

Dampen

Jovan Stosic June 29, 2021

…
Concise Oxford English Dictionary
dampen
■ verb
make damp.
make less strong or intense. ▶reduce the amplitude of (a sound source).

dampener noun
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EngMac
dampen
навлажнува, потиснува (чувства), се натопува; навлажува
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English-Serbian dictionary
Dampen
Ovlaziti-Utuci
…
Concise Oxford Thesaurus
dampen
▶ verb
the rain dampened her face: MOISTEN, damp, wet, dew, water; poetic/literary bedew.
nothing could dampen her enthusiasm: LESSEN, decrease, diminish, reduce, moderate, damp, put a damper on, throw cold water on, cool, discourage; suppress, extinguish, quench, stifle, curb, limit, check, restrain, inhibit, deter.

dry, heighten.
…
Merriam-Webster Collegiate® Dictionary
damp·en
Pronunciation: ‘dam-pən
Function: verb
Inflected Form: damp·ened ; damp·en·ing \’damp-niŋ, ‘dam-pə-\
Date: 1547

transitive verb
1 : to check or diminish the activity or vigor of : DEADEN 2 : to make damp 3 : DAMP 1C
intransitive verb
1 : to become damp
2 : to become deadened or depressed
–damp·en·er \-nər\ noun