LAB 39: JOB CONTROL

At the command line type the following:
```
mail <user>Press Ctrl-z
```
Now type:
```
jobs
```
What is the number in the square brackets?
Now type:
```
sleep 300

jobs

bg
```
What does bg do? What do the + and – signs indicate?
Kill the mail job using job control.
Go into the editor. Type ^Z to stop the job. Now bring the stopped vi job back into the foreground. What command did you type?
Type the following command:
```
jobs –l
```
What is the output?
What is the TMOUT variable used for?
How much time was spent by the kernel when executing the following command:
```
(sleep 5 ; ps –eaf )
```