The vdir command is an equivalent to the “ls -l -b” command, printing the content in long list format and showing escape characters on the file or directory name, just like the dir command is equivalent to the “ls -C -b” command.

Korn shell (or KSH) is a UNIX shell (that complies with POSIX 2) developed in the late 1980s by David Korn at Bell Labs, way earlier than Bash shell.

The C shell (or CSH) and Tcsh were the earliest UNIX/Linux shell interpreters in the late 1970s, inspired by the C programming language.

Dash (or the Debian Almquist shell) is a UNIX/Linux shell that complies with the POSIX standard and earned the title of “lightest shell” (10x smaller in size) compared to Bash.

The restricted bash shell (or rbash) is a Linux shell that blocks certain features of the bash shell for both commands and shell scripts executed inside the restricted shell.

The chroot jail is a process of creating a sandbox environment for a user or script with restricted permissions assigned by the jail creator that can come into use for various reasons, followed by

In this article, you will learn to read large files effectively using either the more or less command and find their huge difference.

The chsh is a UNIX/Linux command-line tool to change the existing or specified user login shell into a new login shell.

The mkdir command is used to create single or multiple directories while also setting a permission when they are created in a Linux system.

In this article, you will learn different ways to list all the available shells in your Linux system, including shells associated with specific users, your own default login shell, and many more.

In this article, you will learn three ways to change a user's login shell in a Linux system using the usermod, chsh, and vim or nano commands.

The touch command is used to create new files, change the file access time and file modification time, replicate another file's timestamp, and much more.

In this article, you will learn what the SSH protocol is, how it works, and a short history of this protocol, including how to install it in Debian, Ubuntu, RedHat, Fedora, Arch, and Manjaro systems.

In this article, you will learn the origin of the term "tty", how they work, what their role is on Linux, and how "tty" is related to "pty" on Linux.

The chvt command is an essential Linux built-in utility to help you switch between different TTY screens (or virtual consoles) from the command line interface.

In this article, you will learn to read large files effectively using either the more or less command and find their huge difference.

The watch command is used to monitor the changes in the command output over a certain interval of time that can also be manually adjusted.

The "most" command is a pager tool like "more" or "less" that is used to display big files on one page at a time and is especially known for the window splitting feature.

In this article, you will learn multiple ways to search for the largest files and directories in your Linux system that are consuming the most disk space.

In this article, you will learn how to list the most and least executed commands in your Linux system to find your favorite tool.