For the given data the following is an easy way to do it:
This will prepend "test_" to the last string containing "<space>table_name" on any line that contains one or more occurrences of that string.
PS. In vi (and ed, and ex) replacing the 1st or last occurrence of something on a line is easy. Replacing the 2nd occurrence of something that may appear 2 or more times takes multiple steps.
Last edited by Don Cragun; 12-03-2013 at 03:07 PM..
Reason: Add PS.
This User Gave Thanks to Don Cragun For This Post:
Hello All,
I have a string "CP_STATUS OSSRC_R6_0_Shipment_R1H_CU AOM_901046 R1H_LLSV1_2008031", and I just want to extract LLSV1, but I dont get the expected result when using the sed command below.
# echo "CP_STATUS OSSRC_R6_0_Shipment_R1H_CU AOM_901046 R1H_LLSV1_2008031" | awk '{print... (4 Replies)
Hi
i want to search two pattern on same line and replace onther pattern..
INPut file
aaaa bbbbb nnnnnn ttttt
cccc bbbbb nnnnnn ppppp
dddd ccccc nnnnnn ttttt
ffff bbbbb oooooo ttttt
now i want replace this matrix like.. i want search for "bbbbb","nnnnnn" and search and replace for... (4 Replies)
Hi,
i want to remove a certain pattern when i type pwd.
pwd will look like this:
..../....../....../Pat_logs/..../....../...../......
the dotted lines are just random directory names,
i want it to remove the "Pat_logs/...../....../....../" part
so for example:
... (8 Replies)
I need this.
aaa
OOOOO
bbb
ccc
OOOOO
ddd
fff
ggg
OOOOO
iii
OOOOO
I need all OOOOO replaced with PPPPP, but only change after the pattern ggg. So the first two OOOOO should not be changed.
OUTPUT should be :-
aaa (2 Replies)
I have a pattern
username:x:32005:32006::/usr/local/user:/bin/bash
I need to match the line containing username and replace /bin/bash with /usr/local/my/bin/noshell
So it becomes
username:x:32005:32006::/usr/local/user:/usr/local/my/bin/noshell (7 Replies)
Hi,
I have a requirement where I need to replace a string in a line and this line will be identified by search criteria on previous line:
E.g.:
I have an xml file and Contents as below:
<Root>
<NameValue>
<name>Global/Text/Data</name>
<value>This is valid... (14 Replies)
Hi, I am a rookie of Linux.
I have a problem on how can I replace a certain pattern in Linux with nothing. Can anyone help me?:(
sample.txt:
<binding>App189
ABC SampleMachine1 ABC
XXX
YYY
ZZZ
</binding>
<binding>App190
ABC SampleMachine2 ABC
XXX
YYY
ZZZ
</binding>
<binding>App191... (3 Replies)
Hi,
Need help to extract a pattern using sed or cut or any other means.
Input
'name1',1234567890
'name2',2222222222
'name3',3333333333
Expected output
name1,1234567890
name2,2222222222
name3,3333333333 (3 Replies)
Hi experts, I'm looking for a unix solution to replacing "NA" within a matrix with the mean of the column:
$cat file
ID a b c d
day 10 5 100 50
cat 20 6 200 50
dog NA 8 NA 50
car 15 NA NA ... (3 Replies)
Not able to paste my content. Please see the attachment :-( (2 Replies)
Discussion started by: vivek d r
2 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)