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The analysis machines are accessible only from a SLAC network and not accessible through the "bastion hosts":pslogin
psdev
and from outside of SLAC using one of the nodes:psexport.slac.stanford.edu
psimport.slac.stanford.edu
To login to analysis host one has to first login to a dedicated "gateway" host with name pslogin. From pslogin one connects directly to analysis hosts(pslogin, psdev, psexport, or psimport), then connect to one of the analysis hosts trough the psana "gateway". The only login type supported by LCLS machines is ssh. Here is the example of the login session from SLAC general network:

yakut % ssh pslogin
....
pslogin % ssh psana
....
psana101psana105 %

Currently all LCLS machines run the same operating system which is RedHat Enterprise Linux 5 (RHEL5).

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