Shell Programming and Scripting

Hi

First post on here hope you can help with something

I have a file with a couple of thousand lines (all lines are one string long, i.e a number

I have another file that is over 1 million lines long

Example entry from file 1
123456

Example from file 2
123456 mjhyuihbn ukghyug uigyu yuyuf utyf rtr

I need to grep the second file for all lines that contain one of the lines from file 1

so at the end i will be left with a line from file 2 that coresponds to each entry in file 1

Any ideas?

Thanks

man grep
look for -f option

Thanks for that, I had tried that but it didnt work i was doing

grep -f file1 file2

getting error
grep: illegal option -- f
Usage: grep -hblcnsviw pattern file . . .

any ideas, i must have usage wrong

this should work.....

Code:

awk 'FILENAME=="file1"{A[$0]=$0}
FILENAME=="file2"{if($0 ~ A[$0]) {print}}' file1 file2

Getting syntax error when I run that, It looks ok to me though,

Anyway i will stick at it, if i figure it out i will post up here

Thanks for your help

Code:

$
$ cat file1
1
5
3
$
$ cat file2
1 this line has 1
5 this line has 5
4 this line has 4
2 this line has 2
3 this line has 3
$
$ perl -ne 'BEGIN {open(F1,"file1"); while(<F1>){chomp; $x{$_}=1} close(F1)}
           {split; print if $x{$_[0]}==1}' file2
1 this line has 1
5 this line has 5
3 this line has 3
$
$

tyler_durden