Remove strings after each first word in a text file

Question

File1:

hello   (OPTION1)   123456   123456   123456
world   (OPTION1)   123456   123456   123456
foo     (OPTION1)   123456   123456   123456
bar     (OPTION1)   123456   123456   123456

How would one remove each string after each first word in the textfile File1?

This would probably be down with awk/sed/cat - but I cannot figure it out. I'm still new to editing via these utilities - perhaps others will benefit from my question.

The first words are not predictive (no wild cards), each first word is unique.

Answer 1

awk one liner:

awk '{ print $1 }' < inputfile > outputfile

sed one liner:

sed 's/^\([A-Za-z0-9]*\).*/\1/' < inputfile > outpufile

Answer 2

You can just trim everything from the first white space onwards:

sed '\s.*$//' <File1

Answer 3

try

awk '{print $1}' filename > filename2

Answer 4

why to use the those tools even after after having the cut command

cut -f1 -d"\t" filename

Answer 5

Or just for fun, you could do it with perl

perl -ne '@a=split; print "$a[0]\n"' < file