UNIX for Dummies Questions & Answers

From what you've said so far, the solution seems to be using grep and sed. I won't do the entire exercise for you, but here's an example:

Code:

(bill@vm) ~ > cat in
99999999999 maximum number(0)
ksuisikjjsl;;l skjss''llsl(0)
minimum number 0000000(0)
maximum number of golds(0)

(bill@vm) ~ > for i in `cat in`; do echo $i | grep "maximum number of golds" >/dev/null 2>&1; if [ $? -eq 0 ]; then echo $i | sed 's/0/1/g' >> newfile; fi; done

(bill@vm) ~ > cat newfile 
maximum number of golds(1)

Let me know if you still have questions.

I need to replace the line in same file not in new file or not to append.....

Ex:
my file :

1 is one
2 is two
3 is three

If i use "sed '/2/s/two/twoTWO/g' >> my file" thn "my file" is like :

1 is one
2 is two
3 is three
2 is twoTWO

but i want like :
1 is one
2 is twoTWO
3 is three
without creating new file (i.e) my file1
"sed '/2/s/two/twoTWO/g' my file >> my file1"

If you are using GNU sed you can use the -i option to edit the file in-place. Otherwise you will have to create a new file and then replace the original with the new file (this is actually what -i does too, but it is automatic), because you can't use a file both for input and output in a pipeline.