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I wanted to do a test for the Job Control Commands.

So, I ran a cat command and then made it a background job using the bgcommand after stopping it with Ctrl +Z.

Now I wanted to first terminate that background process, so I used the command %kill-2%2 as the Process ID was [2] but it gave me an error saying "No such job". I tried it will %kill-9%2 but same error.

I checked it with fg command and that job was still running and it came on foreground

Similarly, I wanted to suspend a background job, so I used the command %kill-19%2 but it gave me an error that "No such Job"

I would like to know my fault or error.

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    It's unclear what you're actually typing which is why I hesitate in providing a direct answer. Did you type kill -2 %2 (with proper spacing and no beginning %)? – Julie Pelletier Jun 25 '16 at 1:57
  • No @JuliePelletier I typed %kill-2%2 without any space because if I give a space then it gives me an error "Too many arguments" – Anonymous Jun 25 '16 at 2:00
  • Then go ahead and try it as I said: kill -2 %2. If that doesn't work, show us the exact command and error message. – Julie Pelletier Jun 25 '16 at 2:09
  • Yeah, It is working. Thanks a lot. I have a question that why some websites say to use % sign before that "kill" word ? – Anonymous Jun 25 '16 at 2:23
  • Many shell command examples show the prompt before the command, but of course you're not supposed to type the prompt😃 – Hans-Martin Mosner Jun 25 '16 at 5:25
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The command should be kill -2 %2 with proper spacing.

The % sign at the beginning of your line is probably just the prompt they are using (PS1).

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