Adding trusted root certificates.

RedHat-like distributions :

openssldir=$(openssl version -a | awk -F'"' '/OPENSSLDIR/ { print $2 }')

cp ca_cert.pem $openssldir/certs/my_ca.crt

cd $openssldir/certs

ln -s my_ca.crt `openssl x509 -hash -noout -in my_ca.crt`.0

Debian-like distributions :

sudo cp foo.crt /usr/local/share/ca-certificates/foo.crt
sudo update-ca-certificates
# The certs and hash links are installed in /etc/ssl/certs

Additional tags : ssl, certificate, authority, ca, cert, root