scp

rpd25 · 01-30-2012, 12:58 AM

Hi,

I used the scp command to transfer files in different clusters.

scp -rp username@remotehost.edu:/DirectoryLocation/udisp.{0,{100..10000..100}}.* .

The files are transferred, however after every 100'th iteration, it asks me the password to transfer files.
This is very irritating. Is there any option to grant transfer permission once?

One more thing, how to transfer multiple files
udisp.{0,{100..10000..100}}.* and vdisp.{0,{100..10000..100}}.*
(in interval of 100's) at once using scp?

Thanks,
Rakesh

rodrifra · 01-30-2012, 01:23 AM

You can use public key to avoid having to introduce the password.

eehmke · 01-30-2012, 01:32 AM

Quote:

Originally Posted by rpd25

Hi,

I used the scp command to transfer files in different clusters.

scp -rp username@remotehost.edu:/DirectoryLocation/udisp.{0,{100..10000..100}}.* .

The files are transferred, however after every 100'th iteration, it asks me the password to transfer files.
This is very irritating. Is there any option to grant transfer permission once?

You can transfer your public ssh key to the target system (even using scp) and add it the authorized_keys file. The key is here:

Code:

~/.ssh/id_rsa.pub

If this does not exist, create it:

Code:

ssh-keygen

On the target system, add it like this:

Code:

cat id_rsa.pub >> ~/.ssh/authorized_keys

You will never been asked for a password again.

Jebram · 01-30-2012, 01:47 AM

To really avoid being asked for a password, use public key
authentication together with ssh-agent and the Batch option of "scp":
ssh-keygen -2 -b 2048
ssh-agent >$HOME/.ssh/ssh-agent-env.sh; source $HOME/.ssh/ssh-agent-env.sh; ssh-add
scp -rpB username@remotehost.edu:udisp*

You did not say what kind of shell you are using. bash supports brace expansion,
but not with step arguments.