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grep -f question

 
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# 1  
Old 03-22-2007
grep -f question
when using grep -f file1 file2

if you have multiple entries in the pattern file1 that are the same will it take the line out of file2 that matches file1 each time it comes up? if not by default can you set a flag to make this possible? or another way - can you get it to search for and match the same pattern more than once?
# 2  
Old 03-22-2007
Code:
$ cat file
1111
1111
2345
$ cat file1
1111
7777
$ grep -f file file1
1111

# 3  
Old 03-22-2007
the search is cutting out the doubles - it should be a one for one match all the way down. apparently i am doing something wrong.
# 4  
Old 03-22-2007
say i have file1

1
1
1
3
4
5

and file2

1 hello i am 1
2 hello i am 2
3 hello i am 3
4 hello i am 4
5 hello i am 5

when i grep this grep -f file1 file2 i need the result below

1 hello i am 1
1 hello i am 1
1 hello i am 1
3 hello i am 3
4 hello i am 4
5 hello i am 5
# 5  
Old 03-22-2007
Code:
# more file1
1
1
1
3
4
5
# more file2
1 hello i am 1
2 hello i am 2
3 hello i am 3
4 hello i am 4
5 hello i am 5
# join file1 file2
1 hello i am 1
1 hello i am 1
1 hello i am 1
3 hello i am 3
4 hello i am 4
5 hello i am 5

# 6  
Old 03-22-2007
Code:
#!/bin/ksh

while read line
do
  grep "$line" file2
done < file1

# 7  
Old 03-22-2007
also - the number pattern can be anywhere on the line in the second file so it needs to find the pattern then substitue the whole line in its place...
 
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