# ----- Initial VPS Security Setup -----

A step-by-step guide to securing your new VPS.

Learn how to create a sudo user, disable root login,

and configure a UFW firewall to protect your server.

# 1. Create a new user and add to SUDO group:

root@localhost:~$ adduser your_new_user

root@localhost:~$ usermod -aG sudo your_new_user

# 2. Lock the root account to disable direct password login:

xinit@localhost:~$ …

# Mastering SSH from basic login to port forwarding for remote access:

# Learn how to connect to custom SSH port, use identity keys, run remote commands, forward ports for database access with these practical examples

xinit@localhost:~$ # Basic SSH connection:

xinit@localhost:~$ ssh user@remote-address

xinit@localhost:~$ # Connect with a custom port (e.g., 2222):

xinit@localhost:~$ …

# Quickly find the largest files and folders that are eating up your disk space

# A practical guide to using "du" and sort to find the top 5 largest directories in Linux

# Check disk usage in the current or any specific path

xinit@localhost:~$ # Top 5 largest files/folders in CURRENT directory:

xinit@localhost:~$ du -sh * | sort -rh | head -n 5

5.7G    Downloads

3.8G    Share …

# Working with .tar.gz archives

# Create and extract .tar.gz files

xinit@localhost:~$ # Create a .tar.gz archive:

xinit@localhost:~$ tar -czvf archive.tar.gz /path/to/source/dir

xinit@localhost:~$ # Create a .tar.gz archive with long options:

xinit@localhost:~$ tar \

    --create --gunzip --verbose --file \

    archive.tar.gz /pat…

# The basic commands for navigation in Linux terminal

# See current location (print working directory)

# List files in directory

# Change directory, return in homedir of current user

xinit@localhost:~$ pwd # Where am I?

/home/xinit

xinit@localhost:~$ ls # What's in here?

Desktop   Documents   Downloads   Music   Pictures   Public   Te…