I recently had to remove a number of columns from a sorted copy of a file, but couldn't get the cut command to take fields out, just what to keep. This is the only thing I could find as an example, but could it be simplified?
Could this be reduced to just one cut (or some other) command? The above just took out one character so everything would appear on one line, but I had to take out much more than that.
I am trying to cut the first 10 characters from a file only if the file has 'xyz' in field 185-188.
I tried this
cat filename | cut -c1-10
but this gives me all the records regardless of what is in field 185-188.
Is this doable ?
Thanks in advance for responses. (2 Replies)
Dear all
I have a large file w. ~ 10 million lines.
The first two cols have matching partners.
For example:
A A
A B
B B
or
A A
B A
B B
The matches may be separated by an unknown number of lines.
My intention is to group them and add a "group" value in the last col.
For... (12 Replies)
Hi
I have a requirement wherein the file is comma separated. Each records seems to have different number of columns, how I can detect like a row index wise, how many columns are present ?
Thanks in advance. (2 Replies)
Hi,
I am looking for a method to get column13 to column 50 data from the 1st line of a multiline reord. The records are stored in a large file and are separated by newline. sample format is
(data in red is to be extracted)
<header>
A001dfhskhfkdsh hajfhksdhfjh... (3 Replies)
I'm working with an extremely outdated and old system at work. We do not have ncurses, but we do have curses. I need to make a user interface for users connecting with xterm. One issue I've encountered is if the user resizes the window, I'd like to provide functionality to redraw the screen with... (4 Replies)
Hi Guys,
Hope you are doing well out there.
I have to format the output of a script.
Current output is auktltbr.dc-dublin.de:4322 ICCIR2Test13-PB-01 active
auktltbr.dc-dublin.de:8322 ICCIR2Test13-SB-02 active
auktlttr.dc-dublin.de:4422 ICCIR2Test24-CB-02 active... (10 Replies)
Dear all, could you please help me with awk please?
I have such input:
Input:
a d
b e
c f
The number of lines is unknown before reading the file.
I need to print possible combination between the two columns like this:
Output:
a d
b d
c d
a e
b e
c e
a f (2 Replies)
this is Korn shell unix.
The scenario is I have a pipe delimited text file which needs to be customized. say for example,I have a pipe delimited text file with 15 columns(| delimited) and 200 rows. currently the 11th and 12th column has null values for all the records(there are other null columns... (4 Replies)
Hello,
I want to compute the bitwise number of matches in pairwise fashion for all columns. The problem is I have 18486955 rows and 750 columns. Please help with code, I believe this will take a lot of time, is there a way of tracking progress?
Input
Org1 Org2 Org3
A A T
A ... (9 Replies)
I have two files and would need to filter out records based on certain criteria, these column are of variable lengths, but the lengths are uniform throughout all the records of the file. I have shown a sample of three records below. Line 1-9 is the item number "0227546_1" in the case of the first... (15 Replies)
Discussion started by: MIA651
15 Replies
LEARN ABOUT PLAN9
pcap_set_tstamp_type
PCAP_SET_TSTAMP_TYPE(3PCAP)PCAP_SET_TSTAMP_TYPE(3PCAP)NAME
pcap_set_tstamp_type - set the time stamp type to be used by a capture device
SYNOPSIS
#include <pcap/pcap.h>
int pcap_set_tstamp_type(pcap_t *p, int tstamp_type);
DESCRIPTION
pcap_set_tstamp_type() sets the the type of time stamp desired for packets captured on the pcap descriptor to the type specified by
tstamp_type. It must be called on a pcap descriptor created by pcap_create() that has not yet been activated by pcap_activate().
pcap_list_tstamp_types() will give a list of the time stamp types supported by a given capture device. See pcap-tstamp(7) for a list of
all the time stamp types.
RETURN VALUE
pcap_set_tstamp_type() returns 0 on success if the specified time stamp type is expected to be supported by the capture device, PCAP_WARN-
ING_TSTAMP_TYPE_NOTSUP on success if the specified time stamp type is not supported by the capture device, PCAP_ERROR_ACTIVATED if called
on a capture handle that has been activated, and PCAP_ERROR_CANTSET_TSTAMP_TYPE if the capture device doesn't support setting the time
stamp type.
SEE ALSO pcap(3PCAP), pcap_list_tstamp_types(3PCAP), pcap_tstamp_type_name_to_val(3PCAP), pcap-tstamp(7)
21 August 2010 PCAP_SET_TSTAMP_TYPE(3PCAP)