Shell Programming and Scripting

Hi,

Long list of Input file1 content:
1285_t
4860_i
4817_v
8288_c
9626_a
.
.
.

Long list of Input file2 content:
1285_t chris germany
8288_c steve england
9626_a dave swiss
9260_s stephanie denmark
.
.
.

Output file:
1285_t chris germany
8288_c steve england
9626_a dave swiss
.
.
.

How I can extract the Input file2 content that got match with Input file1 data?
Thanks a lot for advise

Code:

$ grep -f file1 file2
1285_t chris germany
8288_c steve england
9626_a dave swiss

Hi, do you got any idea if I deal with long list of data ?
For short list of data, I believe "grep" is able to handle it.
But for long list of data, it might be difficult
thanks for your advice ^^

With -m, can save the search time.

-m NUM, --max-count=NUM
Stop reading a file after NUM matching lines. If the input is standard input from a regular
file, and NUM matching lines are output, grep ensures that the standard input is positioned to
just after the last matching line before exiting, regardless of the presence of trailing
context lines. This enables a calling process to resume a search. When grep stops after NUM
matching lines, it outputs any trailing context lines. When the -c or --count option is also
used, grep does not output a count greater than NUM. When the -v or --invert-match option is
also used, grep stops after outputting NUM non-matching lines.

Code:

grep -m 1 -f file1 file2

what about join

Code:

join file1 file2

Hi, I just try the code that you suggested.
Sad to said that it is not worked
Do you have better suggestion?
Both of my input file 1 and file 2 got different line number.
I just want to print out those content that file 1 and file 2 match at first column.
Really thanks for your help

---------- Post updated at 04:01 AM ---------- Previous update was at 03:57 AM ----------

thanks a lot.
Even though take some time to do for huge data
It is worked

apologize, you have to specify the output file like

Code:

join file1 file2 > file3

I've tried with your sample data and it outputs
1285_t chris germany
8288_c steve england
9626_a dave swiss