SaltyCrane Blog

Notes on Python, Django, and web development on Ubuntu Linux

Notes on debugging ssh connection problems

Date: Aug. 31, 2011 | Tags: linux, ssh, ubuntu | 1 Comment

Run the ssh client in verbose mode
```
$ ssh -vvv user@host 
```
On the server, check auth.log for errors
```
$ sudo tail -f /var/log/auth.log 
```
On Red Hat, it's /var/log/secure
For more debugging info, (assuming you have control of the ssh server) run the sshd server in debug mode on another port
```
$ sudo /usr/sbin/sshd -ddd -p 33333 
```
Then specify the port, -p 33333 with the ssh client. e.g.
```
$ ssh -vvv -p 33333 user@host 
```

Commands run on Ubuntu 10.04

sftp error: `Received message too long 170160758`¶

Problem was in the .bashrc. See http://www.snailbook.com/faq/sftp-corruption.auto.html

Fabric post-run processing Python decorator — posted 2010-11-06
Class-based Fabric scripts via a Python metaprogramming hack — posted 2010-09-23
Notes on sshfs on Ubuntu — posted 2010-04-05
Python paramiko notes — posted 2010-02-24
A hack to copy files between two remote hosts using Python — posted 2010-02-08

1 Comment — Comments feed for this post

#1 Test commented on 2012-02-21:

test

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