Kill is a program that can terminate or send a signal to process.
kill -9 pid
Would send signal 9 to process having specific pid. 9 Means KILL signal that is not catchable or ignorable. In other words it would signal process (some running application) to quit immediately.
pid - process identifier.
There is no traditional 'execute' command in Unix.
In UNIX: with command kill, in Windows: from Task Manager.
PID 1 on a Unix or Unix-like system is init. You cannot kill init.
There is no standard 'format' command in Unix.
The 'CD' command is not standard for Unix. The 'cd' command, however, will change directories (folders). It is a means of navigating the Unix file system.
In Unix, use the 'man' command.
The "who" command.
cat /proc/version The above answer will only work on certain systems. For most Unix systems, use the 'uname' command to get the Unix version. AIX uses the oslevel command.
dig
nslookup
kill kill-all Wait that might be in Unix... Windows has "k" and then the "Process ID" or "Process Name" taskkill is another command you could try.
Believe it or not, nslookup.