GUI has this functionality, the cli does not.
It was decided a long time ago that a CLI "root" user could accomplish import using: cp <import_file> /etc/pki/entitlement
However, the design has changed so that an entitlement cert from rhsm-web can now have a key appended (see bug 712980). As such a CLI import function makes sense to handle splitting the contents of the import file..
fixed in master at eeb90f106bc8fe32baf797ae33bdfc48608738f2.
verified using following steps
[root@dhcp201-207 ~]# rpm -qa | grep subscription
[root@dhcp201-207 ~]# subscription-manager list --avail
Error: You need to register this system by running `register` command before using this option.
[root@dhcp201-207 ~]# subscription-manager import --certificate /tmp/4177067579706068544.pem
Successfully imported certificate 4177067579706068544.pem
[root@dhcp201-207 ~]# ls /etc/pki/entitlement/
successfully imported entitlement cert via cli
Working fine moving defect status from ON_QA to verified
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.