Shell Programming and Scripting

Hi Guru's

I have a script that touch a file call "ready2prepro" and copy this file over to a remote host. I am using following scp commands were all the variables are exported before I run the script.

Code:

 scp -p ready2prepro ${REMOTE_USER_NAME}@${REMOTE_HOST}:${REMOTE_DST_PATH}

This script creates the file "ready2prepro" and I checked the permission of the file which I set up to 777. Even I tried to run the command itself but it hungs....not even coming back to the promt and no error.

Can someone please help me to resolve this issue?

You said you are running this from a script right?
You might want to escape @ as in

Code:

scp -p ready2prepro ${REMOTE_USER_NAME}\@${REMOTE_HOST}:${REMOTE_DST_PATH}

And make sure your destination is reachable. execute the script with set -x and see if all the variables are populated correctly.

regards,
Ahamed

Thanks Ahamed, for your quick reply.

I have checked the variables by echo and they are valid. However you made a good point...I can not ping the host although the host is in /var/hosts. Could it be firewall related or public key related issue?

Any thought?

That depends on many factors

1. may the destination machine is not up
2. interface may be down
3. required routes may not be present
4. firewall issue etc

so its obvious why scp is not working.

regards,
Ahamed

Adding the -v (verbose mode) option to the scp command might help. It will cause a bit of debuging information to be written to the standard error which might give you a better idea of what is going on.

Running the command

Code:

ssh -v user@host date

is something I use when things seem not to be working. Ssh will go through the same authorisation process as scp and executing the date command on the far host is easy and quick.

If ping -c 1 host-name fails, then your problem isn't related to scp, but is a network issue. Possible problems are a bad entry in /etc/hosts (if it is used) or a bad DNS entry, or as you said something like a firewall blocking the traffic. If ping does work, then there still could be an issue with the remote host; I've had many instances where a machine could be pinged, but ssh/scp wasn't able to establish a TCP session.

Hope maybe these might help.