Thread: How to use SSH command

I'm trying to run the SSH command from PHP to be able to execute ssh commands on remote servers. I have tried this (ran from PHP/apache):

ssh -v -l user -o stricthostkeychecking=no host.tld
which works from command line, but not from PHP. Here's the output when it’s PHP:
Code:
OpenSSH_4.3p2, OpenSSL 0.9.8e-fips-rhel5
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to --- [---] port 22.
debug1: Connection established.
debug1: identity file /var/www/.ssh/identity type -1
debug1: identity file /var/www/.ssh/id_rsa type -1
debug1: identity file /var/www/.ssh/id_dsa type -1
debug1: loaded 3 keys
debug1: Remote protocol version 2.0, remote software version OpenSSH_4.3
debug1: match: OpenSSH_4.3 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_4.3
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host '---' is known and matches the RSA host key.
debug1: Found key in /var/www/.ssh/known_hosts:1
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,gssapi-with-mic,password
debug1: Next authentication method: gssapi-with-mic
debug1: Unspecified GSS failure. Minor code may provide more information
No credentials cache found

debug1: Unspecified GSS failure. Minor code may provide more information
No credentials cache found

debug1: Unspecified GSS failure. Minor code may provide more information
No credentials cache found

debug1: Next authentication method: publickey
debug1: Trying private key: /var/www/.ssh/identity
debug1: Trying private key: /var/www/.ssh/id_rsa
debug1: Trying private key: /var/www/.ssh/id_dsa
debug1: Next authentication method: password
debug1: read_passphrase: can't open /dev/tty: No such device or address
debug1: Authentications that can continue: publickey,gssapi-with-mic,password
Permission denied, please try again.
debug1: read_passphrase: can't open /dev/tty: No such device or address
debug1: Authentications that can continue: publickey,gssapi-with-mic,password
Permission denied, please try again.
debug1: read_passphrase: can't open /dev/tty: No such device or address
debug1: Authentications that can continue: publickey,gssapi-with-mic,password
debug1: No more authentication methods to try.
Permission denied (publickey,gssapi-with-mic,password).

How can I get it to work?

Obviously, there is an authentication problem when PHP is used rather than the command line. Check out OpenSSH and GSSAPI Mechglue to determine whether you have the patch they talk about in your software.

Also, check out Perl GSSAPI Bindings to see if you are missing some/all/any. Also, does the Apache user have the correct permissions to write to the kerberos cache? The problem may be an imap server problem rather than php.

Read this web page: Bug #33500 imap_open() fails when the server advertises GSSAPI. Make sure all of your software is up-to-date. Also. Why not try this post in the Web Design and Development sub forum where they may have more expertise in PHP problem solutions.Are you using any Linux distribution - i.e. your computer spec say Windows?