02-07-2012
Unless you define what "doesn't work" means, it's possible that no one can help you.
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Does anyone know what the microprograms behind cat (and other commands) are like? In what language are those programs designed? Is their source available somewhere?
No particular reason, just wondering.
I know it's a bit strange... (3 Replies)
Discussion started by: sanchopansa
3 Replies
2. UNIX for Dummies Questions & Answers
Hi
Can anybody tell the difference between Difference between cat , cat > , cat >> and touch command in UNIX?
Thanks (6 Replies)
Discussion started by: skyineyes
6 Replies
3. Shell Programming and Scripting
hi all
i have some script
echo $$ > process-id
d='cat process-id'
if test-s "TMP"$d then
echo "serv1"
else
echo "serv2"
fi
the variable d should contain the number of the process,
instead of that it contains 'cat process-id'
how shall i do that the d will contain only the number?... (6 Replies)
Discussion started by: naamas03
6 Replies
4. Shell Programming and Scripting
Hello Friends,
I have a question, i am trying to write a shell script in the bash shell.
#!/bin/sh
NAWK=/bin/nawk
AWK=/bin/awk
FIX_XML_PATH=/home/administrator/testfix/fix/
Y=`ls $FIX_XML_PATH | grep xml`
echo $Y
cat $Y
in this case when i do the echo $Y command it gives me the... (11 Replies)
Discussion started by: asirohi
11 Replies
5. OS X (Apple)
Hello,
I am trying to send text to a USB to serial adaptor and then to an external speech synthesizer. I tried using the cat and echo commands with no luck. I have gotten some audio output from my synthesizer using Kermit a terminal emulator, so I am pretty sure my synthesizer and my USB to serial... (1 Reply)
Discussion started by: jamesapp
1 Replies
6. Shell Programming and Scripting
I am having problems getting a list of filenames that I want from a directory.
example: I have 3 files - filename.xxx.20110505.123030
filename.yyy.20110505.123030
filename.zzz.20110505.123030
There may be multiple xxx,... (3 Replies)
Discussion started by: Drenhead
3 Replies
7. Shell Programming and Scripting
Can any one guide me how can i accomplish this by script
i continuously receive files via our ftp server into a certain folder is there a way i can take those files cat it to a new file by hour and create a new file when new hour starts? (4 Replies)
Discussion started by: shehzad_m
4 Replies
8. UNIX for Dummies Questions & Answers
Can we concatenate say,
I have a few files prefixing with 2009...
So now i want all the 2009 files into one single file..
Can this be achieved???? (4 Replies)
Discussion started by: saggiboy10
4 Replies
9. Shell Programming and Scripting
Apologies, probably a really simple problem:
I've got a text file (nh.txt) with this in it:
user1 email1 email2
user2 email1 email2
etc
With the following basic script:
for tline in $(cat nh.txt)
do
echo "**********"
echo $tline
done
... (3 Replies)
Discussion started by: nelmo
3 Replies
10. Homework & Coursework Questions
For the command below, I need to understand what exactly the command does and provide an examples for which the output will be saved to file save2... From my understanding, if the file provides an error in the first half of the pipe, it'll save to save1 and will never give an error to save to... (2 Replies)
Discussion started by: ayz649
2 Replies
LEARN ABOUT LINUX
difftime
DIFFTIME(3) Linux Programmer's Manual DIFFTIME(3)
NAME
difftime - calculate time difference
SYNOPSIS
#include <time.h>
double difftime(time_t time1, time_t time0);
DESCRIPTION
The difftime() function returns the number of seconds elapsed between time time1 and time time0, represented as a double. Each of the
times is specified in calendar time, which means its value is a measurement (in seconds) relative to the Epoch, 1970-01-01 00:00:00 +0000
(UTC).
CONFORMING TO
SVr4, 4.3BSD, C89, C99.
NOTES
On a POSIX system, time_t is an arithmetic type, and one could just define
#define difftime(t1,t0) (double)(t1 - t0)
when the possible overflow in the subtraction is not a concern. On other systems, the data type time_t might use some other encoding where
subtraction doesn't work directly.
SEE ALSO
date(1), gettimeofday(2), time(2), ctime(3), gmtime(3), localtime(3)
COLOPHON
This page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
GNU
2010-02-25 DIFFTIME(3)