The touch command in Linux is used to create a new empty file and to change the timestamps of existing files. You can use it with the syntax: touch myfile.txt.

Here’s a simple example:

touch myfile.txt ls -l myfile.txt # Output: # -rw-r--r-- 1 user group 0 Jan 1 00:00 myfile.txt.

In this example, we use the touch command to create a new file named ‘myfile.txt’. If the file ‘myfile.txt’ already exists, this command will update its timestamp.