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How to install DEB on RedHat/Centos & RPM on Debian/Ubuntu with Alien

Introduction There are packages in repositories and GitHub that are ready to use most of the time. But sometimes packages are not available in binaries...

How to use Certbot, create a certificate for domain and submain

Introduction Let's Encrypt is a non-profit certificate authority run by (ISRG) that provides (TLS) encryption certificates at no charge. Certbot identifies the server administrator by a public key. The...

How to Install SpamAssassin on Ubuntu/Debian

What is SpamAssassin? SpamAssassin is free and Open-source and relies on Perl language to scan and identify email headers, subject lines, and body to keep...

How to Upgrade Ubuntu 20.04 / 20.10 to Ubuntu 21.04

Introduction On April 22, 2021, Canonical released Ubuntu 21.04, codenamed ‘Hirsuite Hippo’. Ubuntu 21.04 ships with new features targeted at developers and innovators. These include Flutter...

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