Question

challenge question #4 what is the command that displays the version of the os running?

Explanation:

In Linux - based operating systems, the uname -r or cat /etc/os - release (for more detailed OS - specific info) or lsb_release -a (in some Linux distros) can be used. For Windows, the ver command in the command prompt shows the Windows OS version. If we consider a common general - purpose command (especially in Unix - like systems which are widely used in technical and server - side contexts), uname -r is a common command to display the kernel version (which is related to the OS version). Another common one for more OS - specific details in Linux is cat /etc/os - release.

Answer:

Some common commands: For Linux (kernel version): uname -r; For Linux (OS - specific details): cat /etc/os - release or lsb_release -a; For Windows: ver