@ Scrutinizer: The patterns in the original file are indeed spread over two consecutive lines. That is the reason I merged the two.
I did manage to get an answer for the problem from Jotne and Tom Fenech at stackoverflow.
To count the number of occurrences:
To get the position:
Another approach:
Thank you trying to help me.
@ Don Cragun: perfect explanation for why the script I tried did not work.
Amazed by the capabilities of what scripting can do.
Hi All,
I am pretty new to pattern matching and extraction using shell scripting. Could anyone please help me in extracting the word matching a pattern from a line in bash.
Input Sample (can vary between any of the 3 samples below):
1) Adaptec SCSI RAID 5445
2) Adaptec SCSI 5445S RAID
3)... (8 Replies)
I have a file with the below format,
GS*8*****
ST*1********
A*
B*
E*
RMR*123455(This is the unique number to locate this row)
F*
SE*1***
GE**
GS*9*****
ST*2
H*
J*
RMR*567889(This is the unique number to locate this row)
L*
SE*
GE***** (16 Replies)
I have a file a file having entries are like
@ram@sham@sita
@krishan@kumar
@deep@kumar@hello@sham
in this file all line are having different no of pattern-@.
need to fetch the substring after the last pattern.
like
sita
kumar
sham
thanks in advance (3 Replies)
Hi,
I have a string looks like the following:
USERS 32767.9844 UNDOTBS1 32767.9844 SYSAUX 32767.9844 SYSTEM 32767.9844 EMS 8192 EMS 8192 EMS_INDEXES 4096 EMS_INDEXES 4096 8 rows selected.
How do I extract a sub-string to get the expected output as following:
EMS 8192
EMS_INDEXES 4096
... (3 Replies)
I am facing a problem and I would be grateful if you can help me :wall:
I have a list of words like
And I have a datafile like
the box of
the box of tissues out of
of tissues out of
the book, the
the book, the pen and the
the pen and the
I want to find Patterns of “x.*x” where... (2 Replies)
here is what i want to achieve... consider a file contains below contents. the file size is large about 60mb
cat dump.sql
INSERT INTO `table1` (`id`, `action`, `date`, `descrip`, `lastModified`) VALUES (1,'Change','2011-05-05 00:00:00','Account Updated','2012-02-10... (10 Replies)
The sample file:
dept1: user1,user2,user3
dept2: user4,user5,user6
dept3: user7,user8,user9
I want to match by '/^dept2.*/' but don't want to have substring 'dept2:' in output. How to compose such regex? (8 Replies)
Hi All,
My Problem is like below.
I have a file which contains just one row and contains data like
PO_CREATE12457888888888889SK1234567878744551111111111SK89456321145789955455555SK8888888815788852222
i want to extract SK12345678
SK89456321
SK88888888
So basically SK and next 8... (4 Replies)
Hi,
I know how to replace a string with another in a file.
But, i wish to replace the below string pattern
EncryptedPassword="{gafgfa}]\asffafsf312a" i.e EncryptedPassword="<any random string>"
To
EncryptedPassword=""
i.e remove the random password to a empty string.
Can you... (3 Replies)
Discussion started by: mohtashims
3 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)