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List processes with their listening ports with netstat

Sang

Jul 13, 2019

netstat -nlpt

To include information of tasks which are executed with sudo privilege

sudo netstat -nlpt

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Create a multiple domains (SAN) self-signed SSL certificate

This post includes the following content: * Create a certificate signing request (CSR) * Create your own certificate authority (CA) certificate to self-sign the CSR * Test the signed certificate with chrome and curl Part 1: Create a certificate signing request (CSR) Step 1: Create a private RSA key openssl genrsa -out server.

Aug 31, 2022 — 9 min read

3 ways to use apt in a private server

In this post, I will show 3 ways to use apt in a private server (a server that does not have direct internet access). Method 1: Download the .deb files and install them manually Adding --print-uris to the apt command will print the URLs to download necessary .deb files. You

Aug 31, 2022 — 3 min read

SSH through a proxy server in one command line

This post shows you how to SSH through a proxy server. Prerequisites The local client is required to have OpenBSD netcat installed. There are 2 versions of netcat. Traditional netcat and OpenBSD netcat. This tutorial explicitly requires OpenBSD netcat. Traditional netcat won't work. See their difference here. In macOS: # nc

Aug 1, 2022 — 5 min read

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