1.How you check load on server(CPU/memory) 2.I am unable to login on server with root and normal user also,why so? 3.If suddenly cpu load cross 85% what will you do,what actions you take? 4.What is commands/ways to check connectivity between two server other tha ping command. 5.what is file name for making changes in "kernel parameter" 6.after changed in kernel parameter file is restart required if no which is parameter to be passed 7.if i made changes in sshd_config file what is next to reflect changes. (sub question of Q7--other than service restart/server restart what is command to get reflection after change in config file )