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HELP simple script to find e-mail address on a file

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# 1  
Old 07-30-2014
HELP simple script to find e-mail address on a file
Hello guys, im new to to unix/linux

i have a text file like this:

person1@test.com iisiiasasas
person2@test.com 123w2 3233
sajsja person3@test.com jsajjsa
sajsjasaj person4@test.com


I want to extract only e-mail address and get rid of all other stuff, i want an output like this

person1@test.com
person2@test.com
person3@test.com
person4@test.com

Can someone help? thanks for your time
# 2  
Old 07-30-2014
Please use code tags as required by forum rules!
Try
Code:
grep -o "[^ ]*@[^ ]*" file
person1@test.com
person2@test.com
person3@test.com
person4@test.com

# 3  
Old 07-30-2014
Quote:
Originally Posted by RudiC
Please use code tags as required by forum rules!
Try
Code:
grep -o "[^ ]*@[^ ]*" file
person1@test.com
person2@test.com
person3@test.com
person4@test.com



Thanks but that didnt work on my enviroment.. what could be wrong?
# 4  
Old 07-30-2014
What IS your environment? You failed to mention it. What IS not working? Check the grep man page to see if your grep supports the -o option.
# 5  
Old 07-30-2014
Not highly robust, but for your sample input, here are a couple of ways to do it using awk in the 1st case, and just using standard shell built-in features in the 2nd case:
Code:
echo 'Using awk:'
awk '{for(i = 1; i <= NF; i++) if($i ~ /@/) print $i}' file
printf '\nJust using shell built-ins:\n'
while read -r line
do	set -- $line
	while [ $# -gt 0 ]
	do	if [ "${1#*@}" != "$1" ]
		then	printf '%s\n' "$1"
		fi
		shift
	done
done < file

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