grep only a string on command output

How can I grep exactly a string that has .,/ characters using grep?

Example: I want to grep ONLY string1 and not string1.more or string1.more.evenmore

#lsauth ALL|grep 'string1'

All output:
string1 <--- This is the only I want.
string1.more
string1.evenmore.
more.string1
evenmore.string1.more

thanks in advance.
regards
Israel.

lsauth ALL | egrep '^string1$'

Hi bartus11
umm.. doesn't work for me...:frowning:

I'm testing on AIX 6.1. When I run the command it does not return any output.

regards,
Israel.

Hi

#lsauth ALL|grep 'string1[^.]'

Guru.

Maybe there is space after or before "string1"? Try

lsauth ALL | egrep '^string1 $'

or

lsauth ALL | egrep '^ string1$'

Anyway real output generated by "lsauth" would be much more helpful.