HOWTO copy a file from the ifarm to home

From GlueXWiki
Revision as of 19:14, 9 April 2021 by Marki (Talk | contribs) (2. Use the tunnel to copy the file)

Jump to: navigation, search

Let us assume that you want to copy the file

/cache/halld/RunPeriod-2017-01/analysis/ver44/tree_pi0pippimeta__B5_M7_M17/merged/tree_pi0pippimeta__B5_M7_M17_030648.root

from the lab to home. For this example we start with a shell variable definition to save typing:

file=/cache/halld/RunPeriod-2017-01/analysis/ver44/tree_pi0pippimeta__B5_M7_M17/merged/tree_pi0pippimeta__B5_M7_M17_030648.root

We will assume bash throughout. You will also need a port number, something random between 10000[?] and 65000[?]. We will choose

port=12345

The randomness is to avoid conflicts with other users. And let us assume your JLab username is

user=janedoe

1. Set up an ssh tunnel

ssh -t -L${port}:localhost:${port} $user@login.jlab.org ssh -t -L${port}:localhost:22 ifarm

you will have to type your JLab password twice (unless you are using an ssh agent). Leave the tunnel running.

2. Use the tunnel to copy the file

In a different terminal use the scp command

scp -P$port $user@localhost:$file .

to copy to the current working directory.