What command would you use to list all files, including hidden ones, in a directory?

The command to list all files in a directory, including hidden ones, is accomplished using "ls -a." In Linux, the "ls" command is used to list directory contents. Normally, when you run "ls," it displays only the visible files and directories, leaving out any that start with a dot (.), which are considered hidden files.

By adding the "-a" option, you instruct the command to include all entries, including those hidden files that start with a dot. This is particularly useful for users who need to see configuration files or other hidden items that may not appear in a standard directory listing.

The other options, such as "ls" by itself, will not show hidden files, "list -all" is not a valid command in Linux, and "show all" does not correspond to any existing command for listing files. Hence, "ls -a" is the appropriate command for this purpose.