Sample File
I just created a sample file above to show what I need. I need to grep two lines. e.g abc and xyz(only if they are one after the other) so output would be
(note abc followed by ggh line would not come out in the output). I may have to extend the same for three line grep. Would appreciate if some one can help .
Thanks
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Thank you very much for the quick response. I am sorry, my bad, I have lot of files and want to know the file name that has this two consecutive pattern. Can sed be used for the same as well ?
You could use awk for that, for instance
This prints the filename for every occurrence of the two-line pattern.
You could run it through sort -u to get a list of filenames:
grep has no memory, variables, conditionals; it's not really a language. It only matches lines. It can't do logic like "if one line, do something to another line".
That's just the sort of thing awk was made for, though.
Whenever a line matches the regex /abc/, it sets the variable C to -2.
It increments the value of C every single line, including lines matching /abc/, so matching /abc/ effectively sets C to -1.
Whenever the value of C(after increment) is 0, and the line matches /xyz/, and the special FILENAME variable isn't the same value it was last time the program printed, it prints the filename. The value of C would have to be -1 for (++C)==0 to be true, so this only ever happens when the last line matched /abc/ and the current line matches /xyz/.
---------- Post updated at 09:23 AM ---------- Previous update was at 09:21 AM ----------
Quote:
Originally Posted by Scrutinizer
You could use awk for that, for instance
This prints the filename for every occurrence of the two-line pattern.
You could run it through sort -u to get a list of filenames:
Neat idea, and much simpler than mine, but I think I see a minor flaw in that; what happens when you read the first line from one file, and the second line from another?
Come to think of it, that could be an error condition in mine too.
---------- Post updated at 09:30 AM ---------- Previous update was at 09:23 AM ----------
This should be more resilient:
These 2 Users Gave Thanks to Corona688 For This Post:
Neat idea, and much simpler than mine, but I think I see a minor flaw in that; what happens when you read the first line from one file, and the second line from another?
[..]
Hey, good catch !!
This should fix it, no?
These 2 Users Gave Thanks to Scrutinizer For This Post:
Hi all,
I have two files.
File A looks like this:
abkhasian com|hum
accent com|com|com|com|sta
acceptation act|com|sta
adventures com|hum
adversity com|hum|hum
and File B looks like this:
adventure
adventures
adversary
Adverse
adversity
I want to print those lines in File A... (9 Replies)
Hi guys,
This is probably very easy but I've no idea how to pull this out.
Basically, I need to find errors into a very large logfile. When you grep the ID, the output is like this:
+- Type: 799911 Code: Ret: 22728954 Mand: X Def: Des: UserDes: SeqNo: 2
+- Type: 799911 Code: Ret:... (5 Replies)
Hello. How does one grep lines in a file that have only one field?
AAA BBB CCC
DDD
AAA CCC
Is is possible to grep "DDD" becuase it has only one field?
Thanks.
---------- Post updated at 08:03 PM ---------- Previous update was at 07:25 PM ----------
I found it, thank you!
awk 'NF... (2 Replies)
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19900107 12 144 129 0.7380047
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Hi Friends,
I have a file which has many of the statements like below
******** MAKING > noun1 < cg_all
statements
statements
statements
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statements
statements
statements
********* MAKING > noun3 < all
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statements
statements
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abc xyz abc
This is a test
Test successful
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Just a test
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Hi,
I have for instance following INPUT file from which I want to grep ALL lines NOT containing the literal '{' into an OUTPUT file:
...
RUNJOB=1,AxBxALLxGEx
RUNJOB=0,AxBxDELxGExPRAEMxABLxZGS
RUNJOB=0,AxBxDELxGExPRAEMxHARM
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Hi,
I would like to ask if there is any method to grep a chuck of lines based on the latest file in a directory.
E.g
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Line 1: 532243
Line 2: 123456
Line 3: 334566
Line 4: 44567545
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