Ubuntu¶
Xenial (16.04)¶
How to override the default nameservers
This files needs to be modified /etc/dhcp/dhclient.conf.
Use this directive supersede domain-name-servers 1.1.1.1, 1.0.0.1;
Then restart the networking service # invoke-rc.d networking restart
Note that most answers on askubuntu.com are complete bullshit.
Bionic (18.04)¶
How to override the default nameservers
Bionic uses netplan to handle the configuration of it’s networking stack.
Example of mininum valid netplan config:
root@devonh-desktop:/etc/netplan# cat /etc/netplan/01-network-manager-all.yaml
# Let NetworkManager manage all devices on this system
network:
version: 2
renderer: networkd
ethernets:
enp3s0:
dhcp4: yes
dhcp6: no
gateway4: 192.168.1.1
nameservers:
addresses: [1.1.1.1, 1.0.0.1]
Note that renderer: NetworkManager will not work since this version of Ubuntu uses systemd-resolve as it’s stub resolver.
Useful command to really see what nameservers you’re using systemd-resolve --status
How to update default browser
It needs to be set int he mimeapps.list. 1
All preferences about default applications your user located in file "mimeapps.list". I am use Gnome 3 and Debian, so for me it is ~/.config/mimeapps.list.
I you don`t know where is may be located this file, try command:
locate mimeapps.list
For override default a web browser you need, at least, change values in category [Default Applications]
x-scheme-handler/http
text/html
application/xhtml_xml
image/webp
x-scheme-handler/https
x-scheme-handler/ftp
x-scheme-handler/https
x-scheme-handler/ftp
and in category [Added Associations]
text/html
text/xml
application/xhtml_xml
image/webp
x-scheme-handler/https
x-scheme-handler/ftp
For Opera the file ~/.config/mimeapps.list must contains:
[Default Applications]
x-scheme-handler/http=opera-browser.desktop
text/html=opera-browser.desktop
text/xml=opera-browser.desktop
application/xhtml_xml=opera-browser.desktop
image/webp=opera-browser.desktop
x-scheme-handler/https=opera-browser.desktop
x-scheme-handler/ftp=opera-browser.desktop
[Added Associations]
text/html=opera-browser.desktop;
text/xml=opera-browser.desktop;
application/xhtml_xml=opera-browser.desktop;
image/webp=opera-browser.desktop;
x-scheme-handler/https=opera-browser.desktop;
x-scheme-handler/ftp=opera-browser.desktop;
Try it (must be open in Opera, if it installed)
xdg-open somehtmlfile.html
For Chrome the file ~/.config/mimeapps.list must contains:
[Default Applications]
x-scheme-handler/http=google-chrome.desktop
text/html=google-chrome.desktop
text/xml=google-chrome.desktop
application/xhtml_xml=google-chrome.desktop
image/webp=google-chrome.desktop
x-scheme-handler/https=google-chrome.desktop
x-scheme-handler/ftp=google-chrome.desktop
[Added Associations]
text/html=google-chrome.desktop;
text/xml=google-chrome.desktop;
application/xhtml_xml=google-chrome.desktop;
image/webp=google-chrome.desktop;
x-scheme-handler/https=google-chrome.desktop;
x-scheme-handler/ftp=google-chrome.desktop;
References