Adding certificates to different systems

Mac OS X

 Add Certificate ：
sudo security add-trusted-cert -d -r trustRoot -k /Library/Keychains/System.keychain ~/new-root-certificate.crt
 Remove Certificate ：
sudo security delete-certificate -c ""

Windows

 Add Certificate ：
certutil -addstore -f "ROOT" new-root-certificate.crt
 Remove Certificate ：
certutil -delstore "ROOT" serial-number-hex

Linux (Ubuntu, Debian)

 Add Certificate ：
1. Copy  CA  File to directory ： /usr/local/share/ca-certificates/
2. perform :
sudo cp foo.crt /usr/local/share/ca-certificates/foo.crt
3. to update  CA  Certificate Library :
sudo update-ca-certificates
 Remove Certificate ：
1.Remove your CA.
2.Update the CA store:
sudo update-ca-certificates --fresh
Restart Kerio Connect to reload the certificates in the 32-bit versions or Debian 7.

Linux (CentOs 6)

 Add Certificate ：
1. install  ca-certificates package:
yum install ca-certificates
2. Enable dynamic CA configuration feature:
update-ca-trust force-enable
3.Add it as a new file to /etc/pki/ca-trust/source/anchors/:
cp foo.crt /etc/pki/ca-trust/source/anchors/
4. perform :
update-ca-trust extract
Restart Kerio Connect to reload the certificates in the 32-bit version.

Linux (CentOs 5)

Add Certificate ：

Append your trusted certificate to file /etc/pki/tls/certs/ca-bundle.crt
cat foo.crt >> /etc/pki/tls/certs/ca-bundle.crt