[SOLVED] shell scripting

sryzdn · 06-15-2014, 12:01 AM

Hello

I have the follwoing command:

Quote:

[me@localhost ~]$ for i in {1..10}; do echo "(${RANDOM:0:3}) ${RANDOM:0:3}-${RANDOM:0:4)" >> numlist.txt; done

But it does not work. I cannot figure out where I am going wrong. Could anyone please give me a hint on it?

unSpawn · 06-15-2014, 02:59 AM

Quote:

Originally Posted by sryzdn

Could anyone please give me a hint on it?

Learn where to use parentheses and where not?

eklavya · 06-16-2014, 08:26 AM

Are you going to generate phone numbers?
As unSpawn said, using parentheses at correct place is important.

I am little curious about your third random variable which is of four digit. You have started it with curly braces and ended with parentheses (round bracket). Does it not give you any error?

Do you want to generate 10 numbers like this?

Quote:

(250) 116-1101

sryzdn · 06-16-2014, 09:37 AM

Quote:

Originally Posted by eklavya

Do you want to generate 10 numbers like this?

yes

sryzdn · 06-16-2014, 11:16 PM

Hi,

I changed the script as follows:

Quote:

for i in {1..10}; do echo "^$${RANDOM:0:3}$? ${RANDOM:0:3}-${RANDOM:0:4)" >> numlist.txt; done

I think the problem of the parantheses is solved ?! But, I don't get anything in "numlist"!!!

grail · 06-17-2014, 12:06 AM

I would suggest performing each substring echo individually as you are still not formatting the data correctly.

Code:

echo "^\(${RANDOM:0:3}\)?"
echo "${RANDOM:0:3}"
echo "${RANDOM:0:4)"

Hopefully from here you can see some issues

eklavya · 06-17-2014, 12:42 AM

Are you checking numlist.txt at correct place because it will be created in the directory where you are executing the code.

Your code is working fine for me which you have posted in first post if I change round bracket into curly braces.

Code:

for i in {1..10}; do echo "(${RANDOM:0:3}) ${RANDOM:0:3}-${RANDOM:0:4}" >> numlist.txt; done