Backing up and restoring termux:
https://wiki.termux.com/wiki/Backing_up_Termux

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Setting up apache2 webserver + php
https://parzibyte.me/blog/en/2019/04/28/install-apache-php-7-android-termux/

START SERVER: apachectl
STOP SERVER: apachectl -k stop

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Accessing Phone storage
https://wiki.termux.com/wiki/Internal_and_external_storage


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SSH into Termux:
- Starting ssh server from termux: "sshd"
At boot time ( with termux boot)
- Find out local network device ip: "ifconfig"
- Find out username: "whoami"
- ssh into Termux: "ssh USERNAME@DEVICE_IP -p PORTNUMBER"

Or by adding entry to ~/.ssh/config

Example:
Host s7
	HostName 192.168.0.110
	User u0_a212
	PORT 8022

-> "ssh s7"

- To edit the sshd configuration edit ~/etc/ssh/sshd_config
Example:
"
PrintMotd yes
PasswordAuthentication yes
Subsystem sftp /data/data/com.termux/files/usr/libexec/sftp-server
"
To also enable sftp (can be used by FTP client to access filesystem (example Filezilla Client))

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Ssh into termux from externally:
Can be done by getting a Dynamic DNS
Example:
https://www.noip.com/

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Installing node on Termux
- "apt install nodejs"
- Check npm version "npm -v"
- Check node version "node -v"

- Install angular globally: "npm install -g @angular/cli"
- Install typescript compiler globally: "npm install -g tsc"