Ubuntu Command-Line Interface for VPS Management

Ubuntu provides a powerful command-line interface (CLI) that serves as the primary management tool for Virtual Private Servers (VPS). The CLI offers comprehensive system control through text-based commands, enabling efficient file management, software installation, system monitoring, and service administration.

Essential File and Directory Commands

Command	Description	Example
`ls`	Lists files in a directory	`ls /home/user/Documents/`
`ls -a`	Displays all files including hidden ones	`ls -a ~/`
`cd`	Changes to specified directory	`cd /path/to/directory`
`pwd`	Shows current directory path	`pwd`
`mkdir`	Creates new directory	`mkdir new_folder/`
`rmdir`	Removes empty directory	`rmdir empty_folder/`
`cp`	Copies files	`cp file.txt /backup/`
`cp -r`	Copies directories recursively	`cp -r site/ /var/www/`
`mv`	Moves or renames files/directories	`mv old_file.txt new_location/`
`rm`	Deletes files	`rm unwanted_file.txt`
`rm -r`	Removes directories and contents	`rm -r old_folder/`

File Viewing and Editing

Command	Description	Example
`cat`	Displays complete file contents	`cat file.txt`
`less`	Views file contents page by page	`less logfile.log`
`nano`	Opens file in Nano text editor	`nano ~/document.txt`
`vim`	Opens file in Vim editor	`vim config.conf`
`touch`	Creates empty file	`touch newfile.txt`

Package Management (APT)

Command	Description	Example
`apt update`	Updates package repository list	`apt update`
`apt upgrade`	Upgrades installed packages	`apt upgrade`
`apt install`	Installs software packages	`apt install nginx`
`apt remove`	Removes packages	`apt remove apache2`
`apt autoremove`	Removes unused dependencies	`apt autoremove`
`apt search`	Searches for packages	`apt search docker`
`apt show`	Displays package information	`apt show nginx`

Process and System Monitoring

Command	Description	Example
`top -c`	Shows live running processes	`top -c`
`htop`	Enhanced interactive process viewer	`htop`
`ps aux`	Lists all running processes	`ps aux`
`ps aux \| grep`	Filters process output	`ps aux \| grep nginx`
`uptime`	Shows system uptime and load	`uptime`
`free -h`	Displays memory usage	`free -h`
`df -h`	Shows disk usage by filesystem	`df -h`
`du -sh`	Shows directory size	`du -sh /var/log`

Network Management

Command	Description	Example
`ping`	Tests network connectivity	`ping google.com`
`ip a`	Displays network interfaces	`ip a`
`ss -tuln`	Lists listening ports	`ss -tuln`
`netstat -tuln`	Shows open ports (legacy command)	`netstat -tuln`
`curl`	Transfers data from URLs	`curl -I https://valkyriehosting.com`
`wget`	Downloads files from web	`wget https://valkyriehosting.com/file.zip`

User and Permission Management

Command	Description	Example
`whoami`	Shows current username	`whoami`
`adduser`	Creates new user account	`adduser valkyriehosting`
`passwd`	Changes user password	`passwd valkyriehosting`
`usermod -aG`	Adds user to group	`usermod -aG sudo valkyriehosting`
`chmod`	Modifies file permissions	`chmod 755 script.sh`
`chown`	Changes file ownership	`chown user:user file.txt`
`su`	Switches to different user	`su root`
`sudo`	Executes commands as root	`sudo apt update`

Service Management

Command	Description	Example
`systemctl status`	Checks service status	`systemctl status nginx`
`systemctl start`	Starts service	`systemctl start nginx`
`systemctl stop`	Stops service	`systemctl stop nginx`
`systemctl restart`	Restarts service	`systemctl restart nginx`
`systemctl enable`	Enables service at boot	`systemctl enable nginx`
`journalctl -xe`	Views system logs	`journalctl -xe`

System Control

Command	Description	Example
`reboot`	Restarts the system	`reboot`
`shutdown -h now`	Shuts down immediately	`shutdown -h now`

Firewall Management

Command	Description	Example
`ufw status`	Shows firewall status	`ufw status`
`ufw enable`	Activates firewall	`ufw enable`
`ufw allow`	Opens port	`ufw allow 22`
`ufw deny`	Blocks port	`ufw deny 80`

Session and Automation Tools

Command	Description	Example
`screen`	Creates virtual terminal session	`screen -S my_workspace`
`screen -r`	Reattaches to screen session	`screen -r my_workspace`
`tmux`	Launches terminal multiplexer	`tmux new -s session1`
`crontab -e`	Edits scheduled tasks	`crontab -e`
`crontab -l`	Lists cron jobs	`crontab -l`
`history`	Shows command history	`history`
`clear`	Clears terminal display	`clear`
`exit`	Exits current session	`exit`

These Ubuntu CLI commands provide comprehensive control over VPS environments, enabling efficient server management.

SSH Connection Guide for VPS Servers - Learn how to connect to your VPS using SSH
SFTP Connection Guide - Transfer files securely using SFTP
VPS Setup Guide - Initial configuration and access setup
LAMP Stack Installation - Install Apache, MySQL, and PHP on Ubuntu

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