I assume that users A and B are using the same Linux machine(s) where you are the administrator. The following command will prevent the user with uid 1234 from sending packets on the interface eth0: # iptables -t mangle -A OUTPUT -o eth0 -m owner --uid-owner 1234 -j DROP Thanks to this StackExchange thread.
Today a quick how-to about repackaging of a Debian package with broken dependencies. The context I use a package automatically built from a custom repo who is broken. It uses a mandatory broken dependency libssl1.0.0. This outdated package has been retired from Debian Stretch repositories. As this custom repository don’t provide package sources, I had to dig into this debian package to edit the control file, where package dependencies are defined....
Today a quick command line to know installed packages from a specific repository. If you want to know all installed packages on your machine from download.virtualbox.org: for package in $(dpkg -l | awk '{print $2}'); do apt-cache madison $package | grep download.virtualbox.org; done Simple and easy ! Replace download.virtualbox.org with the repository you are searching for.
Today, a quick how-to on how to: Override nameservers provided by your DHCP server by the ones from https://www.opennicproject.org, when you are using network-manager Use Network-Manager with dnsmasq to speed up DNS resolution I assume you are using your Linux machine as a desktop, not a server, and with network-manager. Always use OpenNIC name servers In /etc/dhcp/dhclient.conf, add this line, this will override DNS provided by your DHCP server: supersede domain-name-servers 193....
Ce n’est pas un secret ni une recette magique et ça dépend un peu de la manière de faire de chacun. Traditionnellement, on ouvre la bal avec un paso-doble. Viennent ensuite tango, valse, cha-cha, rock, bolero. On commence toujours à peu près de cette manière. Après on recommence paso tango valse cha-cha, rock, bolero… MAIS : On ajuste ensuite en fonction du public et toujours en fonction du public et selon l’ambiance de l’après-midi ou soirée....