Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

Random

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Random
# 8  
Old 05-24-2007
Quote:
Originally Posted by anbu23
Code:
no=$(( RANDOM % 21 + 1 ))
while read str
do
	(( no = no - 1 ))
	if [[ $no -eq 0 ]]; then
		word=$str
		break
	fi
done < words_list_file 
letters=$(echo $word | wc -c)
letters=$(( $letters - 1 ))
template="$(echo $word | tr '[a-z A-Z 0-9]' '.')"
remaining=$letters

I have a question or two to better understand this script:

1- $str=string???
2- how dose the script compare and reads the word line?

i hope the questions are not stupid, just trying to get a better understanding.

Thx

K
# 9  
Old 05-24-2007
Quote:
Originally Posted by keyvan
I have a question or two to better understand this script:

1- $str=string???
2- how dose the script compare and reads the word line?

i hope the questions are not stupid, just trying to get a better understanding.

Thx

K
1.Do you mean that how str get the word from file?
While loop reads file line by line and str variable receive the word read from file

2.For each line read from file, variable no is decremented and when its value reaches zero, we reached the desired line in the file and assign value read to variable word and exit the loop.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Homework & Coursework Questions

Random numbers

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! Write a shell script that will take the sum of two random number? Ex: Random n1 +Random n2 = result i tries to write it but i had some dufficulties ... (3 Replies)
Discussion started by: renegade755
3 Replies

2. Shell Programming and Scripting

Need to generate a file with random data. /dev/[u]random doesn't exist.

Need to use dd to generate a large file from a sample file of random data. This is because I don't have /dev/urandom. I create a named pipe then: dd if=mynamed.fifo do=myfile.fifo bs=1024 count=1024 but when I cat a file to the fifo that's 1024 random bytes: cat randomfile.txt >... (7 Replies)
Discussion started by: Devyn
7 Replies

3. Shell Programming and Scripting

Random Variable

Hi, Could you please let me know what the following code does, I know that it means generating random numbers, however not sure what is the entire purpose. R=$(($RANDOM % 2)) delay=$(($RANDOM % 10)) if then TEXT='X' else ... (3 Replies)
Discussion started by: susankoperna1
3 Replies

4. Shell Programming and Scripting

Random ordering

1 2 4 5 3 I would like to use a script so that i can randomly rearrange these numbers such as 3 5 2 4 1 Thanks! (3 Replies)
Discussion started by: johnkim0806
3 Replies

5. UNIX for Dummies Questions & Answers

Random Crashing

Over the last month or so my CentOS server has been crashing for reasons I do not know. It has been running for over a year with regular yum updates without problems. The load on the server is perfectly normal with CPU usage at 5-6% and RAM usage at less than half of 32GB of RAM (multiple smaller... (3 Replies)
Discussion started by: spinner0205
3 Replies

6. Programming

random number

How can I choose randomly the row numbers of my file in awk? (4 Replies)
Discussion started by: Homa
4 Replies

7. Ubuntu

expect script for random password and random commands

Hi I am new to expect. Please if any one can help on my issue its really appreciable. here is my issue: I want expect script for random passwords and random commands generation. please can anyone help me? Many Thanks in advance (0 Replies)
Discussion started by: vanid
0 Replies

8. UNIX for Dummies Questions & Answers

random words

Hi there folks, for an exercise for my pupils (you know i am always thinking of them!) i need to randomly re-arrange the words (blank space separated) in a sentence (a line in a textfile). Any inspiration?? Txk so much. (9 Replies)
Discussion started by: eldeingles
9 Replies

9. Shell Programming and Scripting

$random

I need to use the $RANDOM command to get a line from a list of lines in a file randomly. file is help go three house film how do i randomly get one word without looking into the file? (6 Replies)
Discussion started by: relle
6 Replies

10. Shell Programming and Scripting

Getting a random file

Hello, I am very new to shell scripting. This problem seems quite easy so it should be quite easy (I hope ^^) I want to get a random file from a directory. this file will be in one subdirectory, and it will contain spaces. code I have got so far: N=find ./*/*.jpg | wc -l ((N=RANDOM%N)) ... (6 Replies)
Discussion started by: davidY
6 Replies
Login or Register to Ask a Question