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HPS-SOFTWARE  April 2012

HPS-SOFTWARE April 2012

Subject:

Re: jlab computing tips & clashps

From:

Maurik Holtrop <[log in to unmask]>

Reply-To:

Software for the Heavy Photon Search Experiment <[log in to unmask]>

Date:

Thu, 12 Apr 2012 10:04:45 -0400

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (78 lines)

Hello Matt,

One little tidbit that is often quite useful is that at Jlab there exists a machine: cvs.jlab.org, which plays by different firewall rules than login.jlab.org.  If you ssh there, you can use an ssh key rather than being forced a password as with login.jlab.org. Of course, you get an even more crippled zsh shell once you've done that. 

The cvs.jlab.org is useful because it allow access to the Jlab cvs repositories. It is also useful because it allows password free (ssh key driven) scp transfers. I don't know how it behaves if you run "cvs" from this system, but since you cannot even cd to a different directory, my guess is that it is a bit useless.

Another system: clas12svn.jlab.org, is setup to host the CLAS svn repositories. It does not allow anonymous access, it will ask for your CUE login credentials.

Best,
	Maurik




On Apr 12, 2012, at 9:24 AM, Graham, Mathew Thomas wrote:

> 
> Hi All...
> 
> I thought I'd sends a quick rundown of some useful stuff for traversing the computer landscape (*nix) at JLAB.
> 
> First off, if you want to log in to any of the Linux machines from a non-JLAB machine, you need to go through the login portal:
> login.jlab.org<http://login.jlab.org>
> 
> ...you can't really do anything from this login (really, not even copy a file).  You need to log into one of the interactive machines like:
> jlablX .jlab.org  (X=1-5)
> 
> or for prepping farm work
> ifarml64.jlab.org<http://ifarml64.jlab.org>
> 
> The firewall at JLAB is pretty strict.  Most domains are blocked by default for cvs or svn access (http seems to be ok mostly).  You can get around this by setting up an ssh tunnel through a more accommodating machine.  For example, to do this for the freehep cvs, first log into (e.g.) jlabl4 and do:
> 
> ssh -L localhost:2401:cvs.freehep.org:2401 [log in to unmask]<mailto:[log in to unmask]>
> 
> ...this will give you an ssh tunnel through noric at slac to localhost (jlabl4) for port 2401 (the default pserver ssh port).  Leave this connection open!  Then, login to jlabl4 again and get your cvs package through ocalhost, eg:
> 
> cvs -d :pserver:mgraham@localhost:/cvs/lcd co lcsim
> 
> For svn, the default port is 3690, so the tunnel command is:
> ssh -L localhost:3690:svn.freehep.org:3690 [log in to unmask]<mailto:[log in to unmask]>
> 
> HPS has a group account at JLAB called clashps.  If you need access to it, let FX know and he'll put your ssh public_id key into the list (there is no password, at least as far as we are concerned).  I think this is intended to be the "official" user for hps stuff...we'll put code releases under this user and run production from this account.
> 
> *   /u/home/clashps has 2GB, backed up...
> *   /work/clas/clashps:  1TB of permanent (but not backed up)
> *   /volatile/clas/clashps:  1TB for staging
>    *   these two above are only visible from ifarml64 machines...not jlablX
> *   /u/group/hps has 20GB (backed up) and is visible from farm and jlabl machines
>    *   also mounted on the clonusr3 (our online machine) at /misc/hps
>    *   need an generic hps online account on this machine...talk to Sergey
> 
> I've installed the hps-java software in /u/group/hps/production (although it's not up to date with all of the changes going on).  This is probably the place to keep the releases (backed up, visible all over).  We should discuss how this is going to work and where to put things.  We can also check-out and build everything; I've installed maven (and netbeans) and you can find them in ~clashps/bin.
> 
> Probably other stuff too...any questions/corrections or anything to add let me know.
> 
> Matt
> 
> ps...I'd like to set this up so that everyone can at least read from the clashps directories, but that's not the case now.
> 
> 
> 
> 
> 
> 
> 
> ########################################################################
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