Termux is the best android application to learn about Linux as it give the Linux environment without root. It can be installed in mostly every android phone. However, it is the best way to practice your hacking skills via an Android phone. Termux made the penetration of web way more easier. As you can use it via Android phone anywhere. Here are some basic commands you need to know about termux.

How To Install Metasploit In Termux 2019
Basics Simple Operations:
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cp
Copy Filemv
Move Filels
List Directoryrm
Delete filesln
creates a symbolic link- wget Fetch files over the internet via HTTP or FTP
The are the basic operations you can use them on termux also on Linux machine. However, you can open a website in termux too just by installing a simple tool called w3m.
apt install w3m usage: w3m google.com
Here are some basic commands to install a package.
apt list (Used to check which package is available.) apt show {package name} for example apt show w3m (This is used for more information about the package) apt install {package name} for example apt install w3m (This command is used to install the available package.)
You can also use pkg instead of apt like
pkg install python
Install basic packages to execute programs like python, perl, ruby etc.
pkg update && pkg upgrade pkg install python pkg install curl pkg install wget pkg install perl pkg install ruby pkg install php
Install ngrok for port forwarding in termux. We already published an article on installing ngrok in termux.
Install ngrok in termux