I have a growing file . I knew only last few lines which is constant for evey job run. I'd need to pull the Nth record from the last line. In this case i should not use search pattern.
If you want the last line, use:
Code:
tail -n 1
How you pull the record from a specific position depends on how the record is delimited and what tools you have available (sed, awk, Perl, etc.).
I have a comma-separated record and I'd like to use sed to pull the Nth record from it.
It seems like it'd need to be something like this: sed -n 's/'"\,$1\,"'/&/p'
Am I close? (3 Replies)
does anyone have an awk one-liner to:
print the first line, the second line, then every Nth line, and the last line of a file.
Thanks,
Kenny. (5 Replies)
Hi,
I have a input file with the following entries:
1one
2two
3three
1four
2five
3six
1seven
1eight
1nine
2ten
The output should be
1one
2two
3three
1four
2five
3six (2 Replies)
Hi,
I have a input file with the following entries:
1one
2two
3three
1four
2five
3six
1seven
1eight
1nine
2ten
2eleven
2twelve
1thirteen
2fourteen
The output should be: (5 Replies)
Hi,
For my reuirement, I have to read a file from the 2nd line till the last line<EOF>.
Say,
I have a file as test.txt, which as a header record in the first line followed by records in rest of the lines.
for i in `cat test.txt`
{
echo $i
}
While doing the above loop, I have read... (5 Replies)
can you please tell me
(1) how to delete 1st and 3rd line only from a file.
(2) How to delete last 4 lines in a file that has 2 blank lines out of last 4 lines.
Thank you. (2 Replies)
Is there an awk script that can easily perform the following operation?
I have a data file that is in the format of
1944-12,5.6
1945-01,9.8
1945-02,6.7
1945-03,9.3
1945-04,5.9
1945-05,0.7
1945-06,0.0
1945-07,0.0
1945-08,0.0
1945-09,0.0
1945-10,0.2
1945-11,10.5
1945-12,22.3... (3 Replies)
Hi all,
Greetings. I am facing some troubles and hope that the professionals here could help me.
I am handling a large dataset, and part of it is like below:
1 ab139 0 752566 G A
1 ab151 0 846808 T C
1 ab142 0 854250 G A
1 ab061 0 861808 A G
1 ab043 0 873558 T G... (4 Replies)
Hi All,
I am using UNix Sun OS sun4u sparc SUNW,SPARC-Enterprise
My intention is to insert a line of text after 13th line of every file inside a particular directory.
While trying to do it for a single file , i am using sed
sed '3 i this is the 4th line' filename
sed: command garbled: 3... (5 Replies)
My file (the output of an experiment) starts off looking like this,
_____________________________________________________________
Subjects incorporated to date: 001
Data file started on machine PKSHS260-05CP
**********************************************************************
Subject 1,... (9 Replies)
Discussion started by: samonl
9 Replies
LEARN ABOUT DEBIAN
px_put_recordn
PX_PUT_RECORDN(3) Library Functions Manual PX_PUT_RECORDN(3)NAME
PX_put_recordn -- Stores record in Paradox file at certain position
SYNOPSIS
#include <paradox.h>
int PX_put_recordn(pxdoc_t *pxdoc, char *data, int recpos)
DESCRIPTION
Stores a record in the buffer data into a Paradox file at the given position recpos. The first position has number 0. The function will
determine the data block for this record. If the position is after the last data block, then as many as needed empty data blocks will be
added. If the position is in the middle of a data block and there is no record right before the position, then the position will be recal-
culated to make sure the new record will be stored in the first free slot of the datablock. For example, if a datablock contains H records
and the first call of PX_put_recordn wants to store a record at postion 11, then this will be corrected to position H. PX_put_recordn will
also add an empty data block and store the record as the first record of the second data block. Storing a second record at position 11
again, will be executed without any position change.
data must be constructed with PX_put_data_xxx(3) functions before. It is of the same structure as the record returned by PX_get_record(3)
and PX_get_record2(3).
RETURN VALUE
Returns the record position on success and -1 on failure. The first position has number 0.
SEE ALSO PX_get_record(3), PX_get_record2(3), PX_put_record(3), PX_put_data_byte(3), PX_put_data_short(3), PX_put_data_long(3), PX_put_data_dou-
ble(3), PX_put_data_alpha(3)AUTHOR
This manual page was written by Uwe Steinmann uwe@steinmann.cx.
PX_PUT_RECORDN(3)