$1.$ Create a directory in your home directory called $$assignment$-3$ then,

A$.$ List the files that are in the $/$etc directory that start with the letter $$c$.$ Redirect the output to a file in the assignment$-3$ directory called etc$-$c$-$files. Redirect any errors that you may encounter with this command to a file in your home directory called etc$-$errors.

B$.$ Show the contents of the two created files in step $1-$A$.$

C$.$ Explain the results you got in step $1-$B

D$.$ Append the contents of the file you created in assignment$-1$MyFirstFile$$ to the etc$-$c$-$files file.

E$.$ Show the new contents of the etc$-$c$-$files file

F$.$ Replace any occurrence of the character $$c$$ in the etc$-$c$-$files with the letter $$z$$ in two different ways $($one using the pipe metacharacter, the other using the stdin file descriptor$).$ Show the contents of the updated or newly created file

$2.$ Find the value of the environment variable that contains the commands that you previously executed. Then show a list of the commands that you previously used.

$3.$ Create a file in your home directory called myPhones

A$.$ Insert at least $5$ lines in that file that contain dummy data about different phones. Each line has to have $4$ fields separated by the $+$ character indicating the model, cost, colour and weight of a phone. Example: iPhone$11+1200+$Silver$+\mathrm{.}25$

B$.$ Use the awk command to display the phone models that come in a Silver colour

$4.$ Write a bash shell script named myFirstScript in your assignment$-3$ directory, in which:

A$.$ Input a product name, that could be car, computer, phone,..etc.

B$.$ Output a list of the top $3$ manufacturers of the selected product. Example, if the input is computer, the output could be HP$,$ Lenovo, Apple

C$.$ Repeat steps A & B for at least $4$ times

D$.$ Execute the script, then show its exit status

$5.$ Where is the Linux kernel located?

A$.$ Show the kernel$$s size in Kilobytes

B$.$ Show the kernel$$s major, minor and revision numbers

C$.$ Show the Linux distribution name.

$6.$ You must be running a shell program when you connect to the lab server.

A$.$ Which Shell are you running?

B$.$ What is the PID of your Shell

C$.$ What is PPID of your Shell

D$.$ What is the Priority and Nice value for your Shell

E$.$ Show all the processes that led to your Shell

$7.$ Find the highest percentage of CPU cycles consumed by a process running on the lab server.

$8.$ Find the configuration file for the rsyslogd daemon, then explain the fields in any of the uncommented lines in that file.

$9.$ Issue a command to find your own UID and GID. Find any other groups you are a member of$,$ if any.