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| Question | Answer |
|---|---|
| Why does ssh prompt me for a password? | If you don't have a Kerberos host keytab, password-less ssh will not work. Send a request to unix-admin to install a Kerberos host keytab. |
| Where is /nfs? | Client NFS access is on our to-do list. We have switched from NIS to LDAP, and the automounter maps are not in LDAP yet. In the mean time, you can use scp. |
| Where is /afs? | OpenAFS will be an option in CentOS 7, but not a requirement. We will soon have a Chef cookbook to automatically install and configure OpenAFS. If you need /afs before the cookbook is ready, you can send a request to unix-admin and we can install and configure it manually. |
| What is the difference between CentOS 7 and RHEL 7? | CentOS announced the official joining with Red Hat in January 2014. Although independent from Red Hat Enterprise Linux, the joining of CentOS and Red Hat strengthens the CentOS community and facilitates the CentOS build process since Red Hat is directly involved in supporting it. Scientific Computing Services (SCS) can offer a centrally managed CentOS 7 OS distribution because of the flexibility of the Chef configuration management tool. This provides SLAC the choice to pay for vendor support where required and appropriate, and also leverage the High Energy Physics Unix Information Exchange (HEPiX, https://www.hepix.org) and CentOS community for many use cases. SLAC has benefited from Red Hat Enterprise Linux (RHEL) vendor support since 2004 starting with RHEL 3. SLAC will continue to leverage vendor support from Red Hat, however it will be beneficial to for SCS to manage CentOS 7, and only use RHEL 7 where appropriate (ERP business systems and IBM GPFS servers, for example). |
Please send any questions to unix-admin@slac.stanford.edu
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