Show SSL cert expiration date

cert-check.sh

# Put this into ~/.profile
# Usage:
#   cert-check domain.name
# Example:
#   cert-check www.google.com

function cert-check() {
    yes QUIT | openssl s_client -showcerts -servername $1 -connect $1:443 > /tmp/$1.pem && openssl x509 -inform PEM -in /tmp/$1.pem -text -out certdata | grep -i 'not after'
}