Quesi. Use the find command to compile a list of all directories in your system $($under the root'$/\text{'}$directory$).$ The command must redirect the output so that the list of directories ends up in a file called directories.txt and the list of error messages in a file called errors.txt$.$

while true

do echo hi Comp$311$ students$>$ out

done: wq$!$

$3.$ O$-$annn #$?$ Run the command forever in the background using &$.$

$4.$ Questand forever in the foreground, suspend it with CTRL $+z,$ and put it into the background using bg$.$ Next, run the command jobs, then the command ps$.$ Finally, bring the job back into the foreground with $fg.$

$5.$ O$...$ Dun the command forever four times in the background using &$,$ then use the kill command to terminate the process by its job number. Repeat this task but kill the process by specifying its PID.

$1$

$6.$ Quesin..." ~~ Run the command forever in the background using &$,$ then use the kill command to suspend $($stop$)$the process. Finally, use the bg command to resume running the process.

$7.$ Suppose there are many forever processes in the background, for example, more than $50$ processes in the jobs. We need to kill these processes at once. All processes must be killed unclearly, and the terminal mustn't be killed, terminated, or hanged. $($Justify your command line$)$

$8.$ Quen a create a variable called myprj$2$var in your current bash shell with value project, then make sure that the variable myprj$2$var is passed from bash to $ksh$ when you run a $ksh$ shell under your bash shell.

a$.$ Create a Prj$2$ directory under your home directory, add the directory to the end of your current PATH environment variable $($temporarily$)$ and display the value of the PATH variable on the screen.

$10.$ Questio $-410.$ What is the difference between nice and renice commands? Give a usage