06-01-2012
In what way did it not work?
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1. Shell Programming and Scripting
Hi Can any one help me remove the unwanted data? I would want to remove the complete event id 4910 ( the type there is INFO), that means, I have to remove starting from 7th - 19th lines. can any one of you please help?
Thanks, (24 Replies)
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2. Shell Programming and Scripting
Hi!
I store some data obtained with grep or awk in a file. The problem is that some lines have white space at the begining :
line1
line2
line3
I use something like
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awk >> OUTFILE
I would love if it were possible to remove the white whitout parsing the... (4 Replies)
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3. UNIX for Dummies Questions & Answers
Dear Members,
Suppose i have a variable test which stores a string as below:
test='John drives+++++++++a+++++car'
now i want to use sed on the above variable and replace + with a white space, so that i get
echo $test should give me
'john drives a car'
Between... (1 Reply)
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5. Shell Programming and Scripting
I have a .xml file, where i need some output. The xml file is like:
Code:
<?******?></ddddd><sssss>234</dfdffsdf><sdhjh>534</dfdfa>.........
/Code
I need the output like:
code
234
534
.
.
.
/code
How can i do it? (5 Replies)
Discussion started by: anupdas
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6. Shell Programming and Scripting
Hello
i have a text file like this:
1 AB AC AD EE
2 WE TR YT WW
3 AS UY RF YT
the file is bigger , but that's an example of the data
what i want to do is to merge all columns together except the first one,
it will become like this :
1 ABACADEE
2 WETRYTWW
3 ASUYRFYT (8 Replies)
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7. Shell Programming and Scripting
Hi Guys,
Can someone give me a hand on how I can remove unwanted strings like "<Number>" and "</Number>" and retain only the numbers from the input file below.
INPUT FILE:
<Number>10050000</Number>
<Number>1001340001</Number>
<Number>1001750002</Number>
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8. UNIX for Dummies Questions & Answers
our user creates a text file with a white space on the filename. this same file is transfered to unix via automation tool. i have a korn shell script that reads these files on a input directory and connects to oracle database to run the oracle procedures which will load the data from each of the... (2 Replies)
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I have a file called "dsout" with empty rows and duplicate headers.
DATE TIME TOTAL_GB USED_GB %USED
--------- -------- ---------- ---------- ----------
03/05/013 12:34 PM 3151.24316 2331.56653 73.988785 ... (3 Replies)
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10. Shell Programming and Scripting
i have file in which i want to remove white space from each column where ever it exist
there is white space at the end of line.
i know how to remove white space if i have only 1 column, but i have multiple columns
and white space can be in any column.
sed 's/ *$//' file
ath-miRf10005-akr... (5 Replies)
Discussion started by: mirwasim
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LEARN ABOUT FREEBSD
pcap_get_selectable_fd
PCAP_GET_SELECTABLE_FD(3) Library Functions Manual PCAP_GET_SELECTABLE_FD(3)
NAME
pcap_get_selectable_fd - get a file descriptor on which a select() can be done for a live capture
SYNOPSIS
#include <pcap/pcap.h>
int pcap_get_selectable_fd(pcap_t *p);
DESCRIPTION
pcap_get_selectable_fd() returns, on UNIX, a file descriptor number for a file descriptor on which one can do a select() or poll() to wait
for it to be possible to read packets without blocking, if such a descriptor exists, or -1, if no such descriptor exists. Some network
devices opened with pcap_create() and pcap_activate(), or with pcap_open_live(), do not support select() or poll() (for example, regular
network devices on FreeBSD 4.3 and 4.4, and Endace DAG devices), so -1 is returned for those devices.
Note that in:
FreeBSD prior to FreeBSD 4.6;
NetBSD prior to NetBSD 3.0;
OpenBSD prior to OpenBSD 2.4;
Mac OS X prior to Mac OS X 10.7;
select() and poll() do not work correctly on BPF devices; pcap_get_selectable_fd() will return a file descriptor on most of those versions
(the exceptions being FreeBSD 4.3 and 4.4), but a simple select() or poll() will not indicate that the descriptor is readable until a full
buffer's worth of packets is received, even if the read timeout expires before then. To work around this, an application that uses
select() or poll() to wait for packets to arrive must put the pcap_t in non-blocking mode, and must arrange that the select() or poll()
have a timeout less than or equal to the read timeout, and must try to read packets after that timeout expires, regardless of whether
select() or poll() indicated that the file descriptor for the pcap_t is ready to be read or not. (That workaround will not work in FreeBSD
4.3 and later; however, in FreeBSD 4.6 and later, select() and poll() work correctly on BPF devices, so the workaround isn't necessary,
although it does no harm.)
Note also that poll() doesn't work on character special files, including BPF devices, in Mac OS X 10.4 and 10.5, so, while select() can be
used on the descriptor returned by pcap_get_selectable_fd(), poll() cannot be used on it those versions of Mac OS X. Kqueues also don't
work on that descriptor. poll(), but not kqueues, work on that descriptor in Mac OS X releases prior to 10.4; poll() and kqueues work on
that descriptor in Mac OS X 10.6 and later.
pcap_get_selectable_fd() is not available on Windows.
RETURN VALUE
A selectable file descriptor is returned if one exists; otherwise, -1 is returned.
SEE ALSO
pcap(3), select(2), poll(2)
22 July 2011 PCAP_GET_SELECTABLE_FD(3)