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Re: [HTCondor-users] ssh/scp returning exit code 255 in Bash jobs


<255> is the most generela return code you can get from SSH and means 'something went wrong' ;) 

You might want tor try something like: 

scp -vvv hostxy:/path/to/file/my.file . >&ssh_debug.txt

The debug messages should enlighten your problem ... 


Christoph Beyer
DESY Hamburg

Notkestr. 85
Building 02b, Room 009
22607 Hamburg

mail: christoph.beyer@xxxxxxx

----- UrsprÃngliche Mail -----
Von: "Todd Tannenbaum" <tannenba@xxxxxxxxxxx>
An: "htcondor-users" <htcondor-users@xxxxxxxxxxx>, "Koschmieder, Lukas" <Lukas.Koschmieder@xxxxxxxxxxxxxxxxxxx>
Gesendet: Dienstag, 16. Oktober 2018 22:49:16
Betreff: Re: [HTCondor-users] ssh/scp returning exit code 255 in Bash jobs

On 10/16/2018 9:51 AM, Koschmieder, Lukas wrote:
> Hi,
> When I try to run ssh/scp in a Condor Bash job, the command always fails 
> with exit code 255. Are you familiar with this behavior? How do I enable 
> ssh/scp in my Condor jobs?
> Cheers,
> Lukas

Couple quick thoughts:

- Do really want your job to deal with scripting to use scp and passing 
around credentials? I think usually it is better/easier/safer to use 
HTCondor's file transfer mechanism (which is scheduled) to move files 
from your submit machine to the execute machine ... see 

- If you need to use scp etc, the most common reason I've encountered 
for an exit status of 255 in scripts that run outside of my home 
environment is because I am contacting a host not in my 
$HOME/.ssh/known_hosts file (almost certainly not the case if you are 
using HTCondor without a shared file system or across administrative 
domains).  To remedy, consider passing command-line switches to scp/ssh 
like so:
   scp -o UserKnownHostsFile=./my_temporary_known_host ssh_host ...

Hope the above helps

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