Which command is used to change directories in Linux?

The command used to change directories in Linux is "cd," which stands for "change directory." When you want to navigate from one directory to another in the Linux file system, you use this command followed by the path of the directory you wish to enter. For example, typing "cd Documents" would move you into the Documents directory from your current location.

In contrast, "ll" is a command often used to list files and directories in a detailed format and is simply an alias for "ls -l." The "pwd" command, on the other hand, stands for "print working directory" and is used to display the current directory you are in, rather than changing it. "Top" is a process management tool that provides a dynamic view of system processes and resource usage, which does not pertain to directory navigation. Thus, "cd" is the essential command for changing directories within the Linux environment.