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Hello all,
I am facing a memory related issue on my linux that is CentOS 4.0. What I see as an output of top command, free command is that memory usage is almost 90% which is quite high without much...

I am having a doubt with type casting in C. Very often in network programming, we have something like this:

char *data = ...;
struct iphdr *ip = (struct iphdr *) data;

where iphdr is define in...

I got over the problem. Actually, when you display the ssh dump over a remote monitor, even the bytes transferred for the display will be captured and will result in more packets in the tcpdump...

How can I write the full structure (obviously I am not interested in writing the pointer but the actual record) ?

I am trying to write binary data to a file. My program below:

#include <stdlib.h>
#include <stdio.h>

struct tinner {
int j;
int k[3];
};

struct touter {
int i;
struct tinner...

This is not the answer I am looking for. I believe tcpdump is a widely used free utility to capture network packets in a file. Can someone else update me on using tcpdump to capture all the packets...

I am trying to capture tcpdump for traffic to a port in a file but this does not seem to capture all the packets. Command I use is :

tcpdump -w tdump.dat port 22

Why is it not capturing all the...

Hi want to know the syntax of printing something (value or variable) in GNU make utility. I give this in the Makefile:

echo "Hi"
OR
@echo "Hi"

But I only get error this when I run make (at...

Somewhat better answer by bewing at OSDev.org &bull; View topic - POSIX threads and data safety (http://forum.osdev.org/viewtopic.php?f=13&t=19315)

I created multiple POSIX threads (on readhat Linux) in a C program in my app. What I am doing is - I am creating threads equal to the number of CPUs in the system and and equal number of instances...

It is red hat Linux (Red Hat Enterprise Linux AS release 4, Nahant Update 5 as per cat /etc/redhat-release command)

I am not happy with the answer - even top command seems to be a snapshot of the process(es) as per manual for top.

I am trying to get cpu util and memory occupied for a process. I use these (I am showing output also):

using top
----------
$ top p 25272 d 5
top - 01:52:17 up 2 days, 21:28, 2 users, load...

I have a platform whose base is Linux but not everything is available on that. Only necessary executables are available and any individual executable can run on that. It is 32-bit and uname -a shows...

I want to know all the locks on a file - read, write etc acquired by various processes. Is there any way to know ?

I particularly want to know the meaning of colon : and .* in the line. Can you pls explain ?

Can anyone explain me the meaning of line #2 in these lines of shell script:

if [ "${PMON}" == "yes" ] ; then
${EXPR} " ${MACTIONS
} " : ".* ${ACTION} " >/dev/null 2>&1 || die "$USAGE"
else...