Browse our Cybersecurity technical articles here. We’re sharing our knowledge with fellow cybersecurity practitioners in the hope that we can all progress further and faster in protecting our information systems.

All HowTo's Cybersecurity

Encrypt Large Files With OpenSSL Using Public/Private Keys

This article explains how to encrypt large files with OpenSSL and Public/Private keys. Create your key-pair: openssl req -x509 -nodes -newkey rsa:2048 -keyout private.pem -out public_nopass.pem Encrypt your larger file: openssl smime -encrypt -aes256 -in bigfile.tar -binary -outform DEM -out bigfile.tar.ssl public.pem Decrypt your file: openssl smime -decrypt -in bigfile.tar.ssl

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All HowTo's Cybersecurity Linux Redhat, Fedora and CentOS Linux Ubuntu, Mint & Debian Linux

Sudo Without a Password & Restricted Commands/Groups – CentOS and Redhat

This article explains how to use SUDO without being prompted for the password. We can restrict which users and/or groups can do this. As root, edit the file “/etc/sudoers”. Add the line: agix ALL=(ALL) NOPASSWD: ALL The above means that the user “agix” can use sudo without being prompted for

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