[Hardy] bash-completion takes too long for scp

[Alejandro Díaz-Caro]

Binary package hint: bash-completion

Bash-completion for scp in Gutsy was a very nice feature, but in Hardy, it takes too long to complete the remote paths, and some times, it also hangs the shell.

I tried it trying to connect a Hardy (where I expect completion to work) to a Gutsy. Both system are Kubuntu amd64 with the latest packages.

-----------------------------------------
Client:
Description: Ubuntu hardy (development branch)
Release: 8.04

Server:
Description: Ubuntu 7.10
Release: 7.10

Bash-completion on the client:
janus@ernestina:~$ apt-cache policy bash-completion
bash-completion:
  Instalados: 20060301-3ubuntu2
  Candidato: 20060301-3ubuntu2
  Tabla de versión:
 *** 20060301-3ubuntu2 0
        500 http://ar.archive.ubuntu.com hardy/main Packages
        100 /var/lib/dpkg/status

OpenSSH-Client on the client:
janus@ernestina:~$ apt-cache policy openssh-client
openssh-client:
  Instalados: 1:4.7p1-8ubuntu1
  Candidato: 1:4.7p1-8ubuntu1
  Tabla de versión:
 *** 1:4.7p1-8ubuntu1 0
        500 http://ar.archive.ubuntu.com hardy/main Packages
        100 /var/lib/dpkg/status

OpenSSH-Server on the client:
janus@Roberta-III:~$ apt-cache policy openssh-server
openssh-server:
  Instalados: 1:4.6p1-5ubuntu0.2
  Candidato: 1:4.6p1-5ubuntu0.2
  Tabla de versión:
 *** 1:4.6p1-5ubuntu0.2 0
        500 http://ar.archive.ubuntu.com gutsy-updates/main Packages
        500 http://ar.archive.ubuntu.com gutsy-security/main Packages
        100 /var/lib/dpkg/status
     1:4.6p1-5build1 0
        500 http://ar.archive.ubuntu.com gutsy/main Packages

[Alejandro Díaz-Caro (janus)]

New info: It takes too long in general for any ssh connection (compared with Gutsy)

[Mika Fischer (zoop)]

Reassigning to SSH then.

[Nicolas Valcarcel (nvalcarcel)]

I don't fully understand what do you mean by "it takes too long to complete the remote paths". Can you describe a situation to reproduce it.

[Alejandro Díaz-Caro (janus)]

Oh, sorry, my English is not so good enough.
I mean, when I try to access to a remote file using scp, in general, if the remote system doesn't ask for a password (e.g. if I added a key to allow connecting to it without password), then I usually use [Tab] to complete the path (e.g. if I don't remember it). It worked excellent in Gutsy, but in Hardy it takes to long to complete the path, because it takes to long to access trough ssh.
I obtain the same behaviour when I try to start a ssh connection, it take excessive time (15 second, and it is a direct wired connection in a home network). It was definitively much faster in Gutsy.

[Nicolas Valcarcel (nvalcarcel)]

I can confirm it, i have speed problem even with my virtual machine running in a virtual network.

[Colin Watson (cjwatson)]

Please run ssh with the -vvv option and attach the output to this bug, noting carefully any point in the output where it appears to hang for a substantial period of time.

[Alejandro Díaz-Caro (janus)]

Here is the output, I marked with three dashed lines the point in where it appears to hang for some seconds

janus@ernestina:~$ ssh -vvv roberta-iii
OpenSSH_4.7p1 Debian-8ubuntu1, OpenSSL 0.9.8g 19 Oct 2007
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to roberta-iii [192.168.1.3] port 22.
debug1: Connection established.
debug1: identity file /home/janus/.ssh/identity type -1
debug1: identity file /home/janus/.ssh/id_rsa type -1
debug3: Not a RSA1 key file /home/janus/.ssh/id_dsa.
debug2: key_type_from_name: unknown key type '-----BEGIN'
debug3: key_read: missing keytype
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug2: key_type_from_name: unknown key type '-----END'
debug3: key_read: missing keytype
debug1: identity file /home/janus/.ssh/id_dsa type 2
debug1: Remote protocol version 2.0, remote software version OpenSSH_4.6p1 Debian-5ubuntu0.2
debug1: match: OpenSSH_4.6p1 Debian-5ubuntu0.2 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_4.7p1 Debian-8ubuntu1
debug2: fd 3 setting O_NONBLOCK
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,<email address hidden>,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,<email address hidden>,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,<email address hidden>,hmac-ripemd160,<email address hidden>,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,<email address hidden>,hmac-ripemd160,<email address hidden>,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,<email address hidden>,zlib
debug2: kex_parse_kexinit: none,<email address hidden>,zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,<email address hidden>,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,<email address hidden>,aes128-ctr,aes192-ctr,aes256-ctr
de...

[Nicolas Valcarcel (nvalcarcel)]

Don't confirm your own bugs, wait until someone else confirm it.

[Alejandro Díaz-Caro (janus)]

Oh, sorry, but it was "Incomplete", and I added the necessary
information, so I thought that I had to change it. I'm sorry.

[Mathias Gug (mathiaz)]

May be related to bug 84899.

[Alejandro Díaz-Caro (janus)]

I don't know if this is the same bug. I tried by setting GSSAPIAuthentication to "no", but it didn't resolve the problem.

[Alejandro Díaz-Caro (janus)]

I don't know what changed (packages versions for openssh-client and openssh-server are the same as reported on the first post), but the problem is gone.
I updated my hardy and installed several new packages, so I don't know which was exactly the solution.