Homework & Coursework Questions

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!

1. The problem statement, all variables and given/known data:

*I want to Write shell script to print the this pattern:
1
22
333
4444
55555


*I want to Write shell script to compare the strings, check and see if a command
line argument matched the string "net321" print on screen "** string
matches ** " if not print "** string not matched **"


2. Relevant commands, code, scripts, algorithms:



3. The attempts at a solution (include all code and scripts):



4. Complete Name of School (University), City (State), Country, Name of Professor, and Course Number (Link to Course):
Prince Noura University
Riyadh
KSA
Dr.Monther
NET 321
we don't have a link

Note: Without school/professor/course information, you will be banned if you post here! You must complete the entire template (not just parts of it).


ThanQ for everybody

These are so basic I'm having a hard time not just giving the entire thing away.

Your first question needs two loops. You can use this kind of loop to generate each line:

Code:

for X in 1 2 3 4 5
do
        ...
done

And inside that loop, you need another loop, to generate the string:

Code:

STR=""
while [ ... ]
do
        ...
done

You need to loop until STR is "$X" long, adding another character each time. You can get the length of STR with "${#STR}". See the advanced bash scripting guide and its test operators section, and my example below, to see how comparision inside [ ] brackets works.

For the second one:

Code:

if [ "a" = "a" ]
then
        echo "things are equal"
else
        echo "things are not equal"
fi

Commandline arguments become $1 for the first one, $2 for the second, and so forth.

Remember not to forget the spaces. ["a"="a"] is wrong.

Code:

[ "a" = "a" ]

is valid.

If the first part of your question is not related to the second part, then just create a file, e.g name it something like a.sh, chmod it to 755 and echo all the numbers above:

Code:

[root@tmp]# vi a.sh
echo "1"
echo "22"
echo "333"
echo "4444"
echo "55555"

Then run the file as such:

[root@tmp]# ./a.sh
1
22
333
4444
55555

it's really that simple, don't you have books and notes to refer to?