This command will give us all the information regard the Linux kernel .
lsb_release -aThis command will give us information about the Linux distribution and version of the distribution. This is useful when trying to get help for problem in our distribution, people would like to know you Linux distribution and version.
This command will give use information about the current run level. run level can tell us for example if we have network enable or not, whether we are in a single use or multi user.