On Thu, Sep 18, 2014 at 04:31:03PM -0500, Chris Kottaridis wrote: > In a bash shell script I want to see if a string has nothing but > hexadecimal values in it. > > So: > > A098FE or af098fe > > should be true > > hello > > should not. > > How do I check for that ? > > I've been playing with > > if [[ $val =~ '/^[A-Fa-f0-9]+$/' ]] ; then > echo is hex > else > echo is not hex > fi > > I've tried various incantations of above and also tried using grep > but can't seem to get it just right. > > Any help appreciated. Have you looked in the Advanced Bash Scripting guide? I dunno if it discusses that particular thing, but there is a lot of tricky stuff there that may help you. http://tldp.org/LDP/abs/html/ -- ---- Fred Smith -- fredex@xxxxxxxxxxxxxxxxxxxxxx ----------------------------- "For the word of God is living and active. Sharper than any double-edged sword, it penetrates even to dividing soul and spirit, joints and marrow; it judges the thoughts and attitudes of the heart." ---------------------------- Hebrews 4:12 (niv) ------------------------------ -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
