1. line change $ -> \$
2. line * -> \*
3. line grouped \(...\) everything between start and end. \1 = replaced with value of group 1
in this case we don't need group, so other method is to use value of str = &
I think that heavy sed users has done filtering for those reserved chars.
Maybe better version, 1st simple example how to handle some of chars, in this example i like add <> marks for b and c chars.
Code:
echo "abcdef" | sed 's:[bc]:<&>:g'
#output will be: a<b><c>def
Then solution for $ * [ ] ..., 1st change those ex. * -> \* and so on and after that create delete rule like
/data/d
-f option you can make sed rule file and use it, add comments and so on = make maybe readable for writer also = easier to remember after one year ... need to change.
on the 1st sed rule you can add more reserved chars , if it's not in 1st line.
Code:
cat b.txt | sed 's:[]\[\^\$\.\*\/]:\\&:g' | \
sed "s:^.*$:/&/d:" > x.tmp
sed -f x.tmp a.txt
I have a reference file that needs to remain static and another file that may or may not have duplicate rows that match the reference file. I need help with a command that will delete any duplicate rows from the second file while leaving reference file intact
For example reference file would... (4 Replies)
Hi All,
Need your Help. when i tried deleting lines from one file using another file i got this below error:
$ sed "s/\(.*\)/\/^&$\/d/" a.txt > x.tmp
$ sed -f x.tmp b.txt > target.txt
sed: 0602-405 There are too many commands for the /^111111|.12|.00$/d function.
a.txt:
111111|.11|.00... (5 Replies)
We have a server that logs transactions to a file. I want to write a script that will delete the first 50 lines of the file daily without renameing the file or moving the file. (8 Replies)
Hi Friends
I have a flat file which has sentence like "Notice generated". It can be anywhere in the flat file.
What I want to do is, I want to delete all the lines which are above sentence "Notice generated".
How can I do it.
Kindly advice.
Anushree (5 Replies)
I have a file with 65 sets of 35 coordinates, and would like to isolate these coordinates so that I can easily copy the coordinates to another file. The problem is, I've got a 9 line header before each set of coordinates (so each set is 44 lines long). There are a zillion threads out there about... (3 Replies)
Hi,
Just consider there are around 10 lines in a file. Now is it possible to delete the first 2 lines in the file without opening the file. No matter whatever the content of the file is, I just wanna delete the first 2 lines without opening the file. Is that possible? If so, please help me out.... (3 Replies)
Hi
I have a file & always I need to remove or delete last 2 lines from that file. So in a file if I have 10 lines then it should return me first 8 lines.
Can someone help me? (4 Replies)
I have a file which has some lines starting with a particular word. I would like to delete 5 lines before each such line containing that particular word.
eg:
line1
line2
line3
line4
line5
line6
"particular word"...
I would like to delete line2-line6 and all such occurences in that... (4 Replies)
07-01-2009
for writer also = easier to remember after one year ... need to change.