Arul's Blog Posts

Nginx's "listen ... http2" directive is deprecated message
This blog post shows how to get rid of Nginx's "listen ... http2" directive is deprecated message for newer versions of Nginx.... continue reading

How to Find SSL Certificate Expiration Date With OpenSSL
This blog post shows how to check the SSL certification expiration date using openssl command. This works for both remote websites and certificates stored locally.... continue reading

How to Generate Self-Signed SSL certificate using OpenSSL
How to create self-signed SSL certificate in one line command. This generates ssl certificate and key and uses the openssl command.... continue reading

How to Run or Execute Remote Linux Commands over SSH
Blog post on how to execute or run remote Linux commands over ssh. Includes command to run bash aliases over ssh.... continue reading

How to find MD5, SHA1, SHA256 and SHA512 Checksums Of String
Blog post on how to find MD5, SHA1, SHA256 and SHA512 checksums from your computer without having to use any online tools.... continue reading

How to Remove File Attribute 'Where From' After Downloading on Mac
If you download a PDF or any other file from the Internet on your Mac, it may add a new attribute called "Where from" that shows the URL from where it was downloaded. This blog post shows how to get rid of it on macOS.... continue reading

How to encrypt and decrypt text files using Vim editor
This blog post shows you how to encrypt and decrypt text files using the built-in encryption support in the Vim editor. vim -x... continue reading