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I have this while loop:


while (notdone) {

//Set the timers
waitd.tv_sec = 5;
waitd.tv_usec = 0;

FD_ZERO(&tempreadfds);
FD_ZERO(&tempwritefds);

FD_ZERO(&readfds); ...

Thank You... I'm sorry if its a silly question but what is the difference between owning and reserving a partition?

I am trying to setup a computer where only the database can read/write to a partition. Basically, all other entities should fail. One thing I was thinking about was making the database own the...

Thank You. That works perfectly. I wanted to do this task in a directory recursively on the files and note down the file in which this was found. It was possible with grep but is there a way to make...

I am trying to find only those entries where 7018 and another number appear in the end of the line.


7018 2828 1423 2351
7018 2828 14887
2828 7018 1222
123 7018 1487


I am looking for a...

Thank you for your replies. I was in fact looking at the extension capabilities of firefox in doing certain things with ease... I tried exporting the display to null but it says Error in opening the...

I was wondering if it is possible to run a GUI window (say Firefox) without actually showing up the window on the desktop but still make it do its own regular stuff (like maybe do something via the...

Hi,

I am trying to figure out if there is a way to make linux take me back to the previous directory I was working in. For instance, I am in

/home/username/directory1

Then if I cd into...

@matrixmadhan: Thanks a lot... I have used an almost similar approach from your script but slightly adapted for my own datasets. I will try timing both the approaches and will paste the result here....

Actually I was thinking even PHP was not necessary but that being my core expertise, I thought I'd cover where it would be useful. Perl is more regex centric and so it seems to suffice for most large...

In a recent research experiment I was handling, I faced this task of managing huge amounts of data to the order of Terabytes and with the help of many people here, I managed to learn quite a lot of...

Thank You :) Just learning Unix so got curious in messing around with things...

Yes... That is it... I used a while true loop instead. Thanks a lot... :)

Added to that, I have a small question (not so sure if its silly though but can't seem to understand it completely)...

If I have four datasets like in the problem above and all I have to do is...

Hmm... that's an interesting idea! :) I'd love to try that out... Actually by the time I woke up, it was able to process some 1 TB (so that makes it 7 hours). I don't know how to formally write down...

Sure. Thank You so much. I am open to any advice as I am more interested in learning :) Please let me know if there is some obvious mistake I am doing.

My perl code is:


open (FILE,...

I am processing some terabytes of information on a computer having 8 processors (each with 4 cores) with a 16GB RAM and 5TB hard drive implemented as a RAID. The processing doesn't seem to be...

Thanks for the improvement :) Actually, on my system, for some reason, the find command doesn't work. I mean, extraction is taking place but the gzipping part doesn't seem to work.

The first time...

Hi,

I am trying to grep for the following type of string from a document given below:

12637 1239 3356 12956 7004 7004 7004 13381 13381


*> 12.0.1.63 ...

An easy way to know is to type the following in a unix shell. That's the exhaustive solution you can get.

man command-name

If I am not mistaken, skill and snice are now obsolete and were used...

How about this?


#!/bin/bash

for FILE in `ls`
do
rm {};
done;


But even these can be used:

find ./ -maxdepth 1 -name "*" -exec rm {} \;

and

rm *

Note that rm does not...

I never imagined, I would face so many problems with a directory archived the wrong way :) In any case, I was able to convert a complete directory archive into a directory of archives. In any case,...

Coming to think of it, I am now facing another problem. If the file is in the middle of execution, there is a chance that the cron will take even this file into consideration and execute a gzip on it...

Thank You for the advice. There is a heavy resource constraint so I will try to explore more. I could think of one solution and I would appreciate if someone could provide a better one...

I would...

I have a 13G gz archive... The problem is that when I expand it, it goes to 300G and I don't have so much of hdd space. The file is a one huge file: rrc.tar.gz. What I want to do is to extract the...