Grep Multiple Strings

Shell Programming and Scripting
1

Hi,

Can any one pelase tell me how to grep multiple strings from multiple files in a singel folder?

grep -E "string1|string2|string3|string4|string..."

its taking lots of time..

can any please tell me fast grep???
URGENT

2

If files are big and too many then it will take time..
you can try awk version

awk '/string1/||/string/||...{print}' filenames
3

Hi,
There are multiple files,can we search in the folder or directory?

awk '/string1/||/string/||...{print}' filenames

4

put * in place of filenames to search multiple files

5

Yaa igot them,but iwant to take only one occurence for string.

6

one occurence??
you mean exact match or only the first match??

7

i have multiple records matching with the strings given,i want only 1 record matching.

8

from all the filea??
its better you provide some sample i/p and o/p

9

just an added question. how can i search for multiple strings and print the next string after the "found string"? thanks!

10

Can you provide an example?

11

my working file looks like this:

<empty>
<empty>
<empty>
NAME :ABC AGE :15
GENDER :MALE
<other strings>
<other strings>
NAME :DEF AGE :18
GENDER :FEMALE
<other strings>
<other strings>
NAME :GHI AGE :5
GENDER :FEMALE
<other strings>
<other strings>

output file should be:
ABC|15|MALE
DEF|18|FEMALE
GHI|5|FEMALE

i used this code:

awk -n 'data.awk > output

data.awk looks like this

{
if (substr($1,1,4) == "NAME")
{
name = substr($2,2) ; age = substr($4,2)
}
if (substr($1,1,6) == "GENDER")
{
gender = substr($2,2)
}
print name"|"age"|"gender
}

but it outputs like this:
||
||
ABC|15|MALE
ABC|15|MALE
ABC|15|MALE
ABC|15|MALE
DEF|18|FEMALE
DEF|18|FEMALE
DEF|18|FEMALE
DEF|18|FEMALE
GHI|5|FEMALE
GHI|5|FEMALE
GHI|5|FEMALE
GHI|5|FEMALE
||
||

what could be the problem?

---------- Post updated at 05:28 PM ---------- Previous update was at 05:26 PM ----------

im sorry, i forgot to disable smilies... that smiley is :smiley:

---------- Post updated at 05:37 PM ---------- Previous update was at 05:28 PM ----------

is this code valid?

awk '/NAME/{print ($2,2)}||/AGE/{print ($4,2)}||/GENDER/{print ($2,2)}'input_file >>output_file

---------- Post updated at 06:38 PM ---------- Previous update was at 05:37 PM ----------

pls help me on this...

---------- Post updated at 06:38 PM ---------- Previous update was at 06:38 PM ----------

can anyone help me