For one of my learning projects I needed have passwordless sudo access for a user and group (my sys-admin brain goes "urg urg!"). * sudo access to a group which does not have sudo power * sudo access to a user who does not have a sudo power, not a…
On Fedora when we create a Virtual Machine (via libvirt) we get an IPv4 address (NAT). But for my experiment I wanted a NATed IPv6 address. With the following steps one can get NATed IPV6 address on VMs. On the host First, stop the default network and edit the configuration…
Keeping the system updated is a daily task of sys admins. To find out the available security updates on a Ubuntu machine use the commands here under. I have done this on a virtual machine Ubuntu [https://ubuntu.com/] 21.04. apt update This will update all the package information…
I wanted to upgrade one of my servers from CentOS 7 to CentOS 8 [https://www.centos.org/]. The following are the steps I followed : Check the kernel version Before we start the upgrade process, let us see the kernel version. # uname -a Linux centostest 3.10.0-1127.el7.x86_…
I have been maintaining dgplug [https://dgplug.org/] infrastructure for sometime now. We have a blogging platform, blogs.dgplug.org [https://blogs.dgplug.org] for our community. We were planning to migrate it to the latest version of Operating System and the blogging software, but my post covid symptoms hindered…
I was trying to install bat [https://github.com/sharkdp/bat], from source, the clone of cat command with syntax highlighting and Git integration, in a CentOS [https://www.centos.org/] machine, via cargo, Rust package installer. But it gave me this error: error: linker `cc` not found | = note: No…
To get the Let’s Encrypt [https://letsencrypt.org/] certificate in standalone mode, certbot [https://certbot.eff.org/] needs port 80 to be available, leading to stop the webserver each time before we start the renewal process. The other way of getting and subsequently renewing the certificate is through webroot…
Thunderbird [https://www.thunderbird.net/en-US/] is the free and open source email client by Mozilla Foundation [https://foundation.mozilla.org/en/]. I have been using it for some years now. Till now the Thunderbird users had to use an extension Enigmail [https://enigmail.net/index.php/en/] to use…