Thanks jim, you're amazing. That's what I was looking for. I'm guessing I should just do
if I want more than just 1 match right (so there can be three, four, etc matches)?
I've been coding away at this for a few hours now and yet you gave me that line in a few minutes. Anyway, thanks!
I am doing KSH script to remove duplicate lines in a file. Let say the file has format below.
FileA
1253-6856
3101-4011
1827-1356
1822-1157
1822-1157
1000-1410
1000-1410
1822-1231
1822-1231
3101-4011
1822-1157
1822-1231
and I want to simply it with no duplicate line as file... (5 Replies)
Hi,
I have a file with duplicate lines in it. I want to keep only the duplicate lines and delete the non duplicates. Can some one please help me?
Regards
Narayana Gupta (3 Replies)
Hi,
I am trying to remove duplicate lines from a file. For example the contents of example.txt is:
this is a test
2342
this is a test
34343
this is a test
43434
and i want to remove the "this is a test" lines only and end up with the numbers in the file, that is, end up with:
2342... (4 Replies)
I have a log file "logreport" that contains several lines as seen below:
04:20:00 /usr/lib/snmp/snmpdx: Agent snmpd appeared dead but responded to ping
06:38:08 /usr/lib/snmp/snmpdx: Agent snmpd appeared dead but responded to ping
07:11:05 /usr/lib/snmp/snmpdx: Agent snmpd appeared dead but... (18 Replies)
Hi,
does somebody know how can I step on the lines in a file?
I would like to read a file line by line. And after every line I'd like to do other commands.
Lets help me! ;) (4 Replies)
Hi All,
I am trying to remove the duplicate entries in a file and print them just once. For example, if my input file has:
00:44,37,67,56,15,12
00:44,34,67,56,15,12
00:44,58,67,56,15,12
00:44,35,67,56,15,12
00:59,37,67,56,15,12
00:59,34,67,56,15,12
00:59,35,67,56,15,12... (7 Replies)
Hi All,
I have a very huge file (4GB) which has duplicate lines. I want to delete duplicate lines leaving unique lines. Sort, uniq, awk '!x++' are not working as its running out of buffer space.
I dont know if this works : I want to read each line of the File in a For Loop, and want to... (16 Replies)
Hi,
I copied the contents of a binary file into a .text file using hd (hexdump) command. The data in binary file is such that I get in many places like following
00000250 00 00 00 00 3f 2d 91 68 3f 69 fb e7 00 00 00 00 |....?-.h?i......|
00000260 00 00 00 00 00 00 00 00 00 00 00 00 00... (2 Replies)
hello all
in my bash script I have a file and I only want to keep the lines that appear twice in the file.Is there a way to do this?
thanks in advance! (4 Replies)
I have a file with following data
A
B
C
I would like to print like this n times(For eg:5 times)
A
B
C
A
B
C
A
B
C
A
B
C
A (7 Replies)
Discussion started by: nsuresh316
7 Replies
LEARN ABOUT PLAN9
grep
GREP(1) General Commands Manual GREP(1)NAME
grep - search a file for a pattern
SYNOPSIS
grep [ option ... ] pattern [ file ... ]
DESCRIPTION
Grep searches the input files (standard input default) for lines (with newlines excluded) that match the pattern, a regular expression as
defined in regexp(6). Normally, each line matching the pattern is `selected', and each selected line is copied to the standard output.
The options are
-c Print only a count of matching lines.
-h Do not print file name tags (headers) with output lines.
-i Ignore alphabetic case distinctions. The implementation folds into lower case all letters in the pattern and input before interpre-
tation. Matched lines are printed in their original form.
-l (ell) Print the names of files with selected lines; don't print the lines.
-L Print the names of files with no selected lines; the converse of -l.
-n Mark each printed line with its line number counted in its file.
-s Produce no output, but return status.
-v Reverse: print lines that do not match the pattern.
Output lines are tagged by file name when there is more than one input file. (To force this tagging, include /dev/null as a file name
argument.)
Care should be taken when using the shell metacharacters $*[^|()= and newline in pattern; it is safest to enclose the entire expression in
single quotes '...'.
SOURCE
/sys/src/cmd/grep.c
SEE ALSO ed(1), awk(1), sed(1), sam(1), regexp(6)DIAGNOSTICS
Exit status is null if any lines are selected, or non-null when no lines are selected or an error occurs.
GREP(1)