Unlock the Power of Ubuntu: 50 Must-Have Code Snippets for Beginners

Ubuntu is one of the most popular Linux distributions out there, and for good reason. With its user-friendly interface and vast array of features, it’s a great choice for both beginners and experienced programmers alike. But even if you’re new to Ubuntu, you can still unlock its full potential with the right code snippets. In this blog post, we’ll be sharing 50 must-have code snippets that will help you master Ubuntu and streamline your workflow. Whether you’re just starting out or are looking to take your skills to the next level, these code snippets will give you the tools you need to get the job done.

In this blog post, you will learn how to:

• Install and update software
• Manage files and directories
• Use the terminal
• Customize your Ubuntu environment
• Work with system settings and configurations
• And much more!

With these code snippets, you’ll be able to accomplish tasks quickly and easily, saving you time and making your work more efficient. So without further ado, let’s dive in and start unlocking the power of Ubuntu!

sudo apt-get update
sudo apt-get upgrade

This command updates the package list and upgrades any installed packages that have updates available.

sudo apt-get install [package-name]

This command installs a new package on the system.

sudo apt-get remove [package-name]

This command removes an installed package from the system.

apt-cache search [package-name]

This command searches for a package in the package list.

apt-cache policy [package-name]

This command shows the version number of a specific installed package.

mkdir [directory-name]

This command creates a new directory with the specified name.

cd [directory-name]

This command changes the current working directory to the specified directory.

ls [directory-name]

This command lists the files in a specified directory.

cp [source-file] [destination-file]

This command copies a file from the source location to the destination location.

mv [source-file] [destination-file]

This command moves a file from the source location to the destination location or renames a file.

cat [file-name]

This command displays the contents of a specified file.

nano [file-name]

This command opens a specified file in the nano text editor for editing.

service [service-name] status

This command shows the current status of a specified service.

sudo service [service-name] start

This command starts a specified service.

sudo service [service-name] stop

This command stops a specified service.

sudo service [service-name] restart

This command restarts a specified service.

sudo adduser [username]

This command creates a new user with the specified username.

sudo userdel [username]

This command deletes a specified user.

sudo usermod -a -G [group-name] [username]

This command adds a specified user to a specified group.

uname -a

This command shows system information such as the kernel version and system architecture.

Copy codedf -h

This command shows the disk usage of all mounted file systems on the system, including the amount of used and available space.

free -h

This command shows the current memory usage of the system, including the amount of used and available RAM.

uptime

This command shows the current uptime of the system, including the total amount of time the system has been running.

ps aux

This command shows all currently running processes on the system, including their process ID, user, and status.

kill [process-id]

This command kills a process with the specified process ID.

ip addr show

This command shows the IP address of the system.

ifconfig

This command shows information about the system’s network interfaces, including IP addresses, netmasks, and status.

ln -s [original-file] [link-name]

This command creates a symbolic link with the specified name that points to the original file.

tar -czvf [compressed-file-name.tar.gz] [file-to-compress]

This command creates a compressed archive of the specified file using gzip compression.

tar -xzvf [compressed-file-name.tar.gz]

This command extracts the contents of a compressed archive created using gzip compression.

sudo ufw status

This command shows the status of the firewall, including whether it is active and the rules that are currently in place.

sudo ufw enable

This command enables the firewall.

sudo ufw disable

This command disables the firewall.

sudo ufw allow [port-number]

This command allows incoming traffic on the specified port.

sudo ufw deny [port-number]

This command denies incoming traffic on the specified port.

crontab -e

This command opens the cron table for editing, where you can create a new cron job to run a specific command at a specified time.

crontab -l

This command lists the current cron jobs that are scheduled to run.

nano [script-name].sh

This command creates a new bash script with the specified name.

chmod +x [script-name].sh

This command makes the specified bash script executable.

Copy code./[script-name].sh

This command runs the specified bash script.

sudo netstat -tuln

This command shows all open ports and the process id (PID) associated with them.

tail -f [log-file-name]

This command will display the last 10 lines of a log file and will continue to display any new lines added to the file.

sudo journalctl -f

This command will show the system logs in real-time, and the new log entries will be displayed as they are added.

top

This command will show the system’s current resource usage, including CPU, memory, and process information.

systemctl list-units --type=service

This command will list all running services on the system, along with their status.

dpkg --list

This command will show a list of all packages installed on the system, along with their version numbers.

apt-cache depends [package-name]

This command will show the package’s dependencies and the packages that depend on it.

apt-cache show [package-name]

This command will show detailed information about a specific package, including its version, description, and dependencies.

sudo tail -f /var/log/syslog

This command displays the system log in real-time, which contains various system-related events such as system startup, service status, and error messages.

ps -eo pid,user,%cpu,%mem,comm --sort=-%cpu | head

This command shows the top processes that are currently running on the system, ordered by the highest CPU usage. It includes the process ID (PID), username, CPU usage, memory usage, and command name (comm). The head command at the end limits the output to the top 10 processes.

These are some common Ubuntu commands and their short descriptions, they may differ based on the version of Ubuntu and the distribution you are using.