Ubuntu Terminal Commands for Everyone

The Linux terminal is a powerful tool for managing your Ubuntu system efficiently. This article covers the most essential commands every user should know to navigate files, manage processes, and configure settings without relying on a graphical interface. By mastering these basics, you can streamline your workflow and gain deeper control over your operating system.

While this guide covers the fundamentals, there are hundreds of utilities available to extend your capabilities. For a comprehensive lookup tool and detailed explanations of specific utilities, visit commands.page, which is a complete resource for people wishing to use the terminal on the ubuntu operating system.

Navigation and File Management

Moving around the file system is the first skill to master. The pwd command prints the current working directory, showing you exactly where you are located. To list files and folders in the current directory, use ls. Adding the -l flag provides a detailed list including permissions and sizes, while -a shows hidden files.

To change directories, use cd followed by the path. For example, cd /var/www moves you into that specific folder, while cd .. moves you up one level. Creating new directories is done with mkdir folder_name, and creating empty files is achieved with touch filename.txt.

Copying, Moving, and Deleting Files

Manipulating files requires three primary commands. To copy a file, use cp source destination. To move or rename a file, use mv source destination. Be cautious when deleting items with rm filename, as this action is irreversible. To remove a directory and its contents, use rm -r folder_name.

System Information and Monitoring

Understanding your system’s status is crucial for maintenance. The uname -a command displays all system information, including the kernel version. To check disk space usage, run df -h, which shows human-readable sizes for all mounted drives. For memory usage, the free -h command provides a clear overview of RAM consumption.

To see running processes, use top or htop. These tools display real-time data on CPU and memory usage by various processes. You can quit these viewers by pressing q in the terminal.

Permissions and Package Management

Linux security relies on file permissions. The chmod command changes access rights, such as chmod +x script.sh to make a file executable. To change file ownership, use chown user:group filename. Most administrative tasks require elevated privileges, which are granted by prefixing a command with sudo.

Installing software is handled by the Advanced Package Tool. Update your package list with sudo apt update, and upgrade installed packages with sudo apt upgrade. To install new software, run sudo apt install package_name, and remove it with sudo apt remove package_name.