Your requirements are ambiguous and the output that you say should be produced does not match the sample input you provided. You say that:
should appear at the start of your output, but it did not appear in you input??? Are we supposed to produce random data when we see a line starting with a colon? Or are we supposed to always output the line:
at the start of the output?
Do you want the 1st four lines of each section that starts with a line containing a colon?
After inventing "some data", do you want all lines in the file except for lines five and on when you find a line starting with :7023: and restart printing everything when you find the next line starting with a colon?
Please give us a clear statement of what you are trying to do, a clear sample input file (in CODE tags), and a clear sample output file (in CODE tags) that shows what you want done to the given sample input. Have you sample input contain at least two complete groups of lines that start with a colon.
Hi,
I have file 1.txt with following entries as shown:
0152364|134444|10.20.30.40|015236433
0233654|122555|10.20.30.50|023365433
**
**
**
In file 2.txt I have the following entries as shown:
0152364|134444|10.20.30.40|015236433
0233654|122555|10.20.30.50|023365433... (4 Replies)
I have a file that will sometimes contain a pattern. The pattern is this:
W/D FRM CHK 00
I want to find any lines with this pattern, delete those lines, and also delete the line above and the line below. (1 Reply)
I have a file that will sometimes contain a pattern. The pattern is this:
FRM CHK 0000
I want to find any lines with this pattern, delete those lines, and also delete the line above and the line below. (4 Replies)
I am trying to delete the line with pattern and the next line. Found the below command in forum which also deleted the previous line. how should i modify that to make sure that only the line with pattern and the next line are deleted but not the previous line?
awk '/key... (1 Reply)
Hi,
Before insert, delete everything. If ' available before insert, then we need to keep this.
Input:
====
l_s := ' INSERT INTO TEST1'
INSERT INTO TEST2
Output:
====
'INSERT INTO TEST'
INSERT INTO TEST2 (2 Replies)
if the given pattern exists in the file with the very next line starting and ending
with the same pattern , delete the line that starts and ends with the given pattern.
So upon running on this file
=====================
hai people<PATTERN> we had
<PATTERN>a lot of fun<PATTERN>
... (1 Reply)
How to delete the next lines of the below pattern matches a certain criteria using sed
it is rainy heavily<name>
<name> how is it there <name>
gfhafje
qwfwfqw
eeqewqrt
<name>
there is heavy raining <name>
so that the output will be
it is rainy heavily<name>
gfhafje
qwfwfqw... (2 Replies)
Hi all,
I'm trying to delete line contains pattern from file using ex editor
I have tried something like this
user@host ~ $/usr/bin/echo "/$pattern/d\nwq!"| /usr/bin/ex -s file.txt
This line is from script
but it doesn't work
any idea (4 Replies)
here is what i want to achieve.. i have a file with below contents
cat fileName
blah blah blah
.
.DROP this
REJECT that
.
--sport 7800 -j REJECT --reject-with icmp-port-unreachable
--dport 7800 -j REJECT --reject-with icmp-port-unreachable
.
.
.
more blah blah blah
--dport 3306... (14 Replies)
Discussion started by: vivek d r
14 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)