Shell Programming and Scripting

helo all

i have 2 files. and i want to grep the contents of first file from the 2nd file. but these files are too large contaning lacks of lines .
i'm using for loop but it takes so moch times . is there any other sol.
i'm using this code
"
for var in `cat succ_migrated`
do
grep $var spiceoutdata170_HLR2_new >> output1
done "

files 1st like

404140150599149
404145000433885
404145000562292
404145001022201
404145001108578
2nd file
404140150599149F,919814152178FFFF,1,1,1,1,0,0,0,
404145000433885F,919855014052FFFF,1,1,1,1,0,0,0,
404145000562292F,919855580916FFFF,1,1,1,1,0,0,0,

Hi try this...

awk 'FNR==NR {a[$0]++; next} a[$0]' file1 file2

Thanks
Sha

Hi,

Try this

awk '{ if(FNR==NR) arr[substr($0,1,15)]=$0;
else if(length(arr[$0]) > 0 ) print arr[$0];
}' second_file first_file

Regards

Ranjith

sir plz explain me these codes properly
i'm not able to execute these codes

Above ...both the scripts do the same task that you require..
it takes array of all the data from file1 as well as from file2 and it compares
both the files - kind of loop here.
mean from first file it will keep going on one by one with comparing second file.
Hope this helps you
Thanks
Sha