check hard disk RAID on linux

1. cat /proc/mdstat

2. check mainboad: dmidecode -t 2

3. mdadm --query --detail /dev/md126

Fix for an Expired Intermediate SSL Certificate Chain on MAc OS X

1. Find program Keychain Access
2. Go to Application->Utility->Keychain Access
3. Looking Certificates
4. Choose Certificates change Trust anyway 

Ref.
expired-intermediate-certificate