12-16-2012
First of all you did not clearly mention how
Sieve of Eratosthenes is not working properly. What issues or errors you are observing while running.
But I looked at your
Sieve of Eratosthenes and found several lines with
Useless Use of Cat which you can avoid. Also here are few corrections that you can make and re-run:-
Replace
let calc1=`expr $calc+1` with
let calc1=$( expr $calc + 1 ) (should have space b/w operators and operands)
Replace
let a=`expr $Wordcounter+1` with
let a=$( expr $Wordcounter + 1 ) (should have space b/w operators and operands)
Replace
== with
-eq while performing numeric comparison.
This User Gave Thanks to Yoda For This Post:
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
I was just wondering if anyone has, or knows where to download a prime number finder program. I would like a fairly simple bash program, and also I would like one that could take advantage of multiple processors. I have 500 cores I can use, and would like to take advantage of them using a... (2 Replies)
Discussion started by: Kweekwom
2 Replies
2. UNIX for Dummies Questions & Answers
Hi,
I am generating a file through some Datastage commands:
cat $TempDir/stage.txt |while read line
do
stagename=`echo $line`
dsjob -llinks $proj $jobname $stagename 2>/dev/null >> $TempDir/LinkName.txt
Now i have to assign the number... (5 Replies)
Discussion started by: Amey Joshi
5 Replies
3. Programming
Hi,
How can we generate 16 digit random nos in C. (10 Replies)
Discussion started by: ajaysahoo
10 Replies
4. Programming
Im new to C, and Im having a hard time getting a random number.
In bash, I would do something similar to the following to get a random number;
#!/bin/bash
seed1=$RANDOM
seed2=$RANDOM
seed3=$RANDOM
SEED=`expr $seed1 * $seed2 / $seed3`
echo ${SEED%.*}
Now, in online examples... (4 Replies)
Discussion started by: trey85stang
4 Replies
5. Shell Programming and Scripting
Hello,
I have some extra time at work and I'm trying to come up with a good prime number generator for very large numbers that can take advantage of multiple (hundreds) cores. I realize Perl may not be the best solution for this, any ideas?
Thanks! (1 Reply)
Discussion started by: Kweekwom
1 Replies
6. Shell Programming and Scripting
Hi,
I have a series of data files for which I wish to plot using "splot". Say, the files names are like:
950_data,951_data,952_data,......1000_data.
For one file , say to plot 950_data, i write following lines into a single file and load it in the gnuplot as :
gnuplot> load 'plot'
... (6 Replies)
Discussion started by: begin_shell
6 Replies
7. Shell Programming and Scripting
Hi there I am trying to generate a random number between 40 and 70 using the shell here is my code so far and it keeps going above 70. all help much appreciated!
comp=$(( RANDOM%70+40 ))
echo $comp (4 Replies)
Discussion started by: faintingquiche
4 Replies
8. Shell Programming and Scripting
Having a hard time with this. Very new to scripting and linux. Spent all sunday trying to do this. Appreciate some help and maybe help breaking down what the syntax does.
Create a Bash program. It should have the following properties
• Creates a secret number between 1 and 100
i. The... (3 Replies)
Discussion started by: LINUXnoob15
3 Replies
9. Shell Programming and Scripting
Hi Guys and gals...
As you know I am getting to grips with POSIX and hit this stumbling block.
Generating two random numbers 0 to 255 POSIXly. Speed in not important hence the 'sleep 1' command.
I have done a demo that works, but it sure is ugly! Is there a better way?
#!/bin/sh
# Random... (12 Replies)
Discussion started by: wisecracker
12 Replies
10. UNIX for Beginners Questions & Answers
I have a factor program that runs and outputs to stdout all the prime numbers that are specified in the given paramters, in this case 30000000-31000000.
Command:
factor/factor 30000000-31000000
Sample output:
30999979 = 30999979
30999980 = 2^2 5 11 140909
30999981 = 3 10333327... (6 Replies)
Discussion started by: steezuschrist96
6 Replies
LEARN ABOUT DEBIAN
sysprofile
SYSPROFILE(8) System Manager's Manual SYSPROFILE(8)
NAME
sysprofile - modular centralized shell configuration
DESCRIPTION
sysprofile is a generic approach to configure shell settings in a modular and centralized way mostly aimed at avoiding work for lazy sysad-
mins. It has only been tested to work with the bash shell.
It basically consists of the small /etc/sysprofile shell script which invokes other small shell scripts having a .bash suffix which are
contained in the /etc/sysprofile.d/ directory. The system administrator can drop in any script he wants without any naming convention
other than that the scripts need to have a .bash suffix to enable automagic sourcing by /etc/sysprofile.
This mechanism is set up by inserting a small shell routine into /etc/profile for login shells and optionally into /etc/bashrc and/or
/etc/bash.bashrc for non-login shells from where the actual /etc/sysprofile script is invoked:
if [ -f /etc/sysprofile ]; then
. /etc/sysprofile
fi
For using "sysprofile" under X11, one can source it in a similar way from /etc/X11/Xsession or your X display manager's Xsession file to
provide the same shell environment as under the console in X11. See the example files in /usr/share/doc/sysprofile/ for illustration.
For usage of terminal emulators with a non-login bash shell under X11, take care to enable sysprofile via /etc/bash.bashrc. If not set
this way, your terminal emulators won't come up with the environment defined by the scripts in /etc/sysprofile.d/.
Users not wanting /etc/sysprofile to be sourced for their environment can easily disable it's automatic mechanism. It can be disabled by
simply creating an empty file called $HOME/.nosysprofile in the user's home directory using e.g. the touch(1) command.
Any single configuration file in /etc/sysprofile.d/ can be overridden by any user by creating a private $HOME/.sysprofile.d/ directory
which may contain a user's own version of any configuration file to be sourced instead of the system default. It's names have just to
match exactly the system's default /etc/sysprofile.d/ configuration files. Empty versions of these files contained in the $HOME/.syspro-
file.d/ directory automatically disable sourcing of the system wide version.
Naturally, users can add and include their own private script inventions to be automagically executed by /etc/sysprofile at login time.
OPTIONS
There are no options other than those dictated by shell conventions. Anything is defined within the configuration scripts themselves.
SEE ALSO
The README files and configuration examples contained in /etc/sysprofile.d/ and the manual pages bash(1), xdm(1x), xdm.options(5), and
wdm(1x). Recommended further reading is everything related with shell programming.
If you need a similar mechanism for executing code at logout time check out the related package syslogout(8) which is a very close compan-
ion to sysprofile.
BUGS
sysprofile in its current form is mainly restricted to bash(1) syntax. In fact it is actually a rather embarrassing quick and dirty hack
than anything else - but it works. It serves the practical need to enable a centralized bash configuration until something better
becomes available. Your constructive criticism in making this into something better" is very welcome. Before i forget to mention it: we
take patches... ;-)
AUTHOR
sysprofile was developed by Paul Seelig <pseelig@debian.org> specifically for the Debian GNU/Linux system. Feel free to port it to and use
it anywhere else under the conditions of either the GNU public license or the BSD license or both. Better yet, please help to make it into
something more worthwhile than it currently is.
SYSPROFILE(8)