Ubuntu

The “z” is the operator in the Bash script considered for checking whether the variable is empty or not utilized in the “if” conditions.

To install CUDA on Ubuntu, execute the “sudo apt install nvidia-cuda-toolkit” command. Before it, check the status of the GPU that supports the CUDA or not.

In Linux, the timestamp is generated through the date command, bash script, and the python module in various formats like “Year-Month-Day Hour-Minutes-Seconds”.

To fix the client/server “connection refused” error, open the port on the server side and make communication with the client using a specific port.

A M3U8 consists of the URLs of the playlists, and it can be viewed online or downloaded using the FFmpeg tool. The file is then played using the VLC player.

To test the PHP script in Linux, create a .php script file and run the “php script_name.php” command. Also, users can access the script file in the web browser.

To boot into Rescue or Emergency modes, users must enter “systemd.unit=rescue.target” and “systemd.unit=emergency.target” in the boot parameters.

In Ubuntu, the GOPATH environment variable is set by exporting the directory path using the syntax “export GOPATH=$HOME/” in the “.bashrc” file.

A user can renew the DHCP lease on Ubuntu by first releasing the current DHCP lease and then by renewing the DHCP lease.

A user can static IP in Ubuntu using a command line by modifying the netplan configuration file or using the network manager command line interface.

Allowing ports through the UFW firewall can help secure your system by only allowing network traffic on specific ports. Read this article for more details.

To restart the “PostgreSQL” server in Ubuntu, use the “systemctl” and “service” command line managers with the “sudo” support in case of non-root users.

To create desktop shortcuts, copy an application’s “.desktop” file to the “~/Desktop.” Use the “ln” command in the terminal for the desktop file shortcut.

To customize GNOME in Ubuntu, install the “Extension Manager” tool that provides many free and open-source extensions. Read this post for more details.

The “ClamAV” CLI is installed from the Ubuntu standard repository via the “apt” and “ClamTK” GUI interface from the “Ubuntu Software” center.

To access the Windows files from Ubuntu, a dual-boot system, the mount command is used with the NTFS-3G driver to mount the unmounted disk.

The superblock, inode, dentry, and file combine to make a virtual file system, with each of them having different uses, but work together in Linux VFS.

The “ncdu” provides a command line interface to check the disk space details at the window’s bottom. For more details, follow this post.

The “rsync” command provides the options to delete the destination file, such as “–delete,” “–delete-after,” and “–delete-before.”

Ubuntu operating system supports a large list of command line text editors from which, most commonly, “nano” and “vim” are used to edit files.

Ubuntu supports “Evince”, “Zathura”, and “Atril”, PDF document viewers. These PDF viewers have simple interfaces alongside their unique functionalities.

Learn how to remove Niginx from the Linux system, i.e., removing only executables, removing only dependencies, removing dependencies/configurations

Discover if there’s a free VPN service compatible with Ubuntu. Learn about the best options and benefits of using a VPN on Ubuntu.

The “rar” utility is available on the default packages list of Ubuntu and can be installed using the command “sudo apt install rar” and the snap store.

To set the default gateway in Ubuntu, execute the “sudo ip route add default via ” command or edit the “01-network-manager-all.yaml” file.

To remove NodeJS from Ubuntu, use the APT package manager and source directory to remove packages along with all dependent and configuration files.

In Linux, the “daemon-reload” reloads the entire systemd unit files while the “reload” only reloads the specific service configuration files.

In Ubuntu, the alternatives to Notepad++ are “Nano”, “Gedit”, “Vim”, “Sublime text”, “Geany”, and “Kate”. Read this post for their detailed description.

The “/var/lib/apt/lists” directory stores all the package information downloaded from the ubuntu server when the user runs the “sudo apt command”.

To reattach an existing screen session, use the “screen” tool followed by the “-r(reattach)” argument and the “SID” or the “specific session name”.

To reinstall the “pip3” for Python3 and “pip” for Python 2 use the default “apt” package manager with superuser privileges or log in as a root user.

To update the NodeJs versions in Ubuntu, use the “NVM(Node Version Manager)”, “NPM(Node Package Manager)”, and “Binary Packages”.

In Linux, SUID, SGID, and Sticky bit are permission bits that are utilized to specify special permission rules for the file or directory.

gdm3, kdm, and lightdm are display managers of Linux that provide the interface for the login screen and can be installed or uninstalled.

Google meet is an online platform for making audio or video calls. It is a super useful tool, especially if you are working remotely.

In Ubuntu, the “wheel” group is a special user group that provides administrative access to certain users on a system to perform administrative tasks.

To check the version of Apache running on a Ubuntu, use the “apache2”, “type”, “apt”, “apachectl”, and “tail” commands or web browser (GUI).

In Ubuntu, the “ls”, “locate”, and “grep” command-line utilities can be utilized to get the absolute path of the “php.ini” configuration file.

To get the complete and exact list of the mounted file system in Linux, the built-in “findmnt”, “df” and “lsblk” utilities are considered.

In Ubuntu, the Apache access log files are stored in the “/var/log/apache2” directory. These files contain details of all the requests made to the web server.

Ubuntu supports “apt” and “snap” package managers to remove the firefox browser completely. It can also be done using the “rm(remove)” command.

To upgrade Java on Ubuntu, use the “sudo apt install openjdk-19-jdk” command or download the latest version of Java from the Oracle website and install it.

Ubuntu has no default device manager. This post has listed the best alternatives for Device Managers. Read this post for installation methods

Learn how to easily install Netflix on Ubuntu and enjoy all your favorite shows and movies without any hassle. Follow our detailed guidelines.

To use Microsoft Office without wine, the user can access the online version of Microsoft Office or use alternatives such as Onlyoffice and LibreOffice.

To make ZSH the default shell in Ubuntu, use the “chsh -s $(which zsh)” or “sudo usermod -s /usr/bin/zsh ” commands or edit the “/etc/passwd” file.

Multiple freezing states of Ubuntu are faced, such as freeze at boot time, the specific program, or the mouse stopping working. See the guide for solutions.

In Ubuntu, use the “add-apt” command line tool to delete the repository and the “gpg” to delete the “GPG” keys i.e “public” and “private”

To install FileZilla on Ubuntu, use the command “sudo apt install filezilla” from the default or the PPA repository, or the GUI (Ubuntu Software Center) method.

n Ubuntu, the user can install applications using “apt”, “snap”, “flatpak”, and “dpkg” package managers. It can also be done via “third-party” repositories.

The top 3 free alternatives for MS Paint in Ubuntu are Krita, Pencil2D, and Pinta. These applications provide the same functionalities as MS Paint.

In Ubuntu, major log files are located in the “/var/log” directory. It includes “sys.log”, “auth.log”, and “kern.log” log files.

Install the PHP version to switch, disable the current PHP module, and enable the new one. Or you can use the “update-alternatives” command.

To get a list of all installed PPA repositories, utilize the “apt policy” command, “Software & Updates” utility, and “/etc/apt/sources.list” file.

To remove PostgreSQL from the system, remove all the packages of PostgreSQL by listing them. After that remove the directories and PostgreSQL users as well.

To enable the dark mode in the LibreOffice application access the “Options” window from the “Tools” menu list and select “dark” in the “Colour Scheme” section.

To install fonts on Ubuntu, use the “Font-Manager” application, add the font to the default font directory, or, manually create the font directory.

To install the latest Kernel on Ubuntu, use the “Mainline” tool or manually download the Debian files to update the Kernel.

Ubuntu offers the “apt-cache search”, “apt search”, “apt list”, and “dpkg” commands to search available packages from the command line.

On Ubuntu 22.04 LTS, the Laravel application can be easily installed through “composer” as a command with “superuser”, i.e., “sudo” privileges.

Ubuntu offers the “.bashrc”, “.profile”, and “/etc/environment” files to add a path to the PATH environment variable permanently.

To install the GNOME disks utility on Ubuntu, use the command “sudo apt install gnome-disk-utility” on your system. Read this post for more details on it.

To enable and disable the root user account in Ubuntu, utilize the “sudo -i” and “sudo -s”, “usermod”, “passwd” commands, and “sshd_config” files.

Learn how to easily access and use AppImage files on Ubuntu with our step-by-step guide. No need to follow the complex installation process.

Learn how to clear the DNS cache on Ubuntu for better internet performance and troubleshoot DNS issues with our detailed guide on flushing the DNS.

On Ubuntu, reset the lost administrative password using the “root shell prompt” with the “passwd” command through the “recovery mode” from the “GNU GRUB”.

To install Portainer CE with Docker-Compose, install the Docker, Docker-Compose, and then set up the Portainer CE in that directory