Setup Environment

Before doing anything else, please verify the system date on your local machine.  It needs to be reasonably accurate for the grid security infrastructure to work.

date
date MMDDhhmm    		    to check the current time   
    to set the current time

At the beginning of every shell session, you will need to set some environment variables and initialize a grid proxy.  This can be done by issuing the following commands:

source ~/ldg-3.0/setup.sh   
grid-proxy-init

 Note:  The source command assumes the LSC DataGrid Client software was installed into your home directory.  Adjust if necessary.

You can quickly verify that the setup script worked correctly by issuing the command:

echo $GLOBUS_LOCATION

This variable should have a value associated with it (e.g. /home/<userid>/ldg-3.0/globus).

Problems? Contact support.

Verify SSH

Make sure that the Grid SSH is the one in your path by issuing:

which ssh

This should find the ssh executable in the ~/ldg-3.0/globus/bin directory.

At this point, you should be able to ssh to any of the LSC DataGrid servers without specifying a password (the grid proxy certificate is used instead), e.g.:

ssh ldas-grid.ligo-la.caltech.edu

Exit the remote shell to return back to your local machine.

exit

Problems? Contact support.

Verify GridFTP

First, issue the globus-hostname command:

globus-hostname

If the server, ldas-grid.ligo-la.caltech.edu, cannot open connections back to your machine using this name, then issue the following export command:

export GLOBUS_HOSTNAME=141.142.22.154   <-- IP Address of your client machine

Copy a local file to a remote GridFTP server by doing something like this:

# create a test file

cd
cat >mytestfile.txt
line1
line2
line3
<Cntl-D>

# send it to server

globus-url-copy file:/home/<userid>/mytestfile.txt \
   gsiftp://ldas-grid.ligo-la.caltech.edu/data2/<userid>/mytestfile.txt

# check that file transferred okay

ssh ldas-grid.ligo-la.caltech.edu
ls
cat mytestfile.txt

exit

Problems? Contact support.