[Chapter 9] Appendix

1. Index of Basic Linux Commands for Beginners

ID	Command Name	Description	Featured Chapter
`cmd-01`	`apt update`	Check for software updates	[Chapter 3]
`cmd-02`	`apt upgrade`	Execute software updates	[Chapter 3]
`cmd-03`	`nano`	Text editor	[Chapter 4]
`cmd-04`	`systemctl restart`	Restart a service	[Chapter 4]
`cmd-05`	`adduser`	Add a new user to the system	[Chapter 4]
`cmd-06`	`apt install`	Install a software package	[Chapter 4]
`cmd-07`	`visudo`	Dedicated editor for sudo privileges	[Chapter 4]
`cmd-08`	`sudo`	Run a command with `root` privileges	[Chapter 4]
`cmd-09`	`chmod`	Change permissions of a file/folder	[Chapter 4]
`cmd-10`	`mkdir`	Create a new directory (folder)	[Chapter 5]
`cmd-11`	`systemctl reload`	Reload a service	[Chapter 5]
`cmd-12`	`wget`	Access (or download) a web file	[Chapter 6]
`cmd-13`	`acme.sh`	Commands related to acme.sh certificate management	[Chapter 6]
`cmd-14`	`rm`	Remove (delete) command	[Chapter 7]
`cmd-15`	`touch`	Create an empty file	[Chapter 7]
`cmd-16`	`systemctl`	Basic `systemd` service management command	[Chapter 7]
`cmd-17`	`reboot`	Reboot the Linux system	[Chapter 7]

ID	Config File Location	File Description	Featured Chapter
`conf-01`	`/etc/ssh/sshd_config`	SSH remote login program settings	[Chapter 3]
`conf-02`	`/etc/nginx/nginx.conf`	Nginx program settings	[Chapter 5]
`conf-03`	`/etc/sysctl.d/99-bbr.conf`	Custom kernel parameter config file	[Chapter 7]

ID	Config File Location	File Description	Featured Chapter
`xray-01`	`/usr/local/etc/xray/config.json`	Xray program settings	[Chapter 7]
`xray-02`	`/home/vpsadmin/xray_cert/xray.cert`	TLS Certificate	[Chapter 7]
`xray-03`	`/home/vpsadmin/xray_cert/xray.key`	TLS Private Key	[Chapter 7]
`xray-04`	`/home/vpsadmin/xray_log/access.log`	Xray Access Log	[Chapter 7]
`xray-05`	`/home/vpsadmin/xray_log/error.log`	Xray Error Log	[Chapter 7]