Bash conditionals: how to “and” expressions? (if [ ! -z $VAR && -e $VAR ])

Question

I guess I\'m not clear on how to do \"and\" tests. I wanted to make sure an argument existed which was working well with [ -e $VAR ], but it turns out that was also

Answer 1

I found an answer now. Thanks for your suggestions!

for e in ./*.cutoff.txt; do
if grep -q -E 'COX1|Cu-oxidase' $e
then
    echo xyz >$e.match.txt
else
    echo
fi

if grep -q -E 'AMO' $e
then
    echo abc >$e.match.txt
else
    echo
fi; done

Any comments on that? It seems inefficient to grep twice, but it works...