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ssh terminated
I am using scientific linux 6
I wrote the command line # ssh master but got the output root@master's password: Terminated ( it gives a terminated message without giving any time to write the password even ) Why does the ssh fails to run ? What causes it to terminate ? Can somebody help ? Thanks in advance |
Did you download the os from th internet?
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You need to explain in full what you are doing. What OS is the server running and what OS is the guest running? Have you set SSH up so that root login is allowed (a bad idea if SSH is exposed to the internet)?
Assuming you have a CentOS server and are using a CentOS guest and haven't made any configuration changed to SSH then you should be able to SSH between them using your normal, no root, account. |
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no root ? you mean root can't access ssh ? |
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What is the difference ? How can the source affect ( ssh) ? Thanks |
Try the command ssh -vvv master and post the output. It will add additional debug information. logging in as root is discouraged but possible.
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gives the following output : OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb 2013 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug2: ssh_connect: needpriv 0 debug1: Connecting to master [192.168.0.200] port 22. debug1: Connection established debug1: permanently_-set_uid: 0/0 debug1: identity file /root/.ssh/identity type -1 debug1: identity file /root/.ssh/identity-cert type -1 debug1: identity file /root/.ssh/id_rsa type -1 debug1: identity file /root/.ssh/id rsa-sert type -1 debug1: identity file /root/.ssh/id_dsa type -1 debug1: identity file /root/.ssh/id_dsa_cert type -1 debug1: identity file /root/.ssh/id_ecdsa type -1 debug1: identity file /root/.ssh/id_ecdsa-cert type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3 debug1: match: OpenSSH_5.3 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_5.3 debug2: fd 3 setting 0_NONBLOCK debug1: SSH2_MSG_KEXINIT sent debug3: Wrote 960 bytes for a total of 981 debug1: SSH2_MSG_KEXINIT received debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256, diffie-hellman-group-exchange-shal, diffie-hellman-group14-shall,diffie-hellman-group1-shal debug2: kex_parse_kexinit: ssh-rsa-cert-v01@openssh.com, ssh-dss-cert-v01@openssh.com, ssh-rsa-cert-v00@openssh.com,ssh-dss...00@openssh.com,ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-ctr, aes192-ctr, arcfour256,arcfour128,aes128-cdc,3des-cdc-blowfish-cbc,cast128-cdc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se debug2: kex_parse_kexinit: aes128-ctr, aes192-ctr, arcfour256,arcfour128,aes128-cdc,3des-cdc-blowfish-cbc,cast128-cdc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se debug2: Kex_parse_kexinit: hmac-md5, hmac-shal, umac-64@openssh.com,hmac-sha2-256,hm...60@openssh.com,hmac-shal-96,hmac-md5-96 debug2: Kex_parse_kexinit: hmac-md5, hmac-shal, umac-64@openssh.com,hmac-sha2-256,hm...60@openssh.com,hmac-shal-96,hmac-md5-96 debug2: Kex_parse_kexinit: none, zlib@openssh.com ,zlib debug2: Kex_parse_kexinit: none, zlib@openssh.com ,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-shal, diffie-hellman-group14-shall,diffie-hellman-group1-shal debug2: Kex_parse_kexinit: ssh-rsa, ssh-dss debug2: kex_parse_kexinit: aes128-ctr, aes192-ctr, arcfour256,arcfour128,aes128-cdc,3des-cdc-blowfish-cbc,cast128-cdc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se debug2: kex_parse_kexinit: aes128-ctr, aes192-ctr, arcfour256,arcfour128,aes128-cdc,3des-cdc-blowfish-cbc,cast128-cdc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se debug2: Kex_parse_kexinit: hmac-md5, hmac-shal, umac-64@openssh.com,hmac-sha2-256,hm...60@openssh.com,hmac-shal-96,hmac-md5-96 debug2: Kex_parse_kexinit: hmac-md5, hmac-shal, umac-64@openssh.com,hmac-sha2-256,hm...60@openssh.com,hmac-shal-96,hmac-md5-96 debug2: Kex_parse_kexinit: none, zlib@openssh.com ,zlib debug2: Kex_parse_kexinit: none, zlib@openssh.com ,zlib debug2: Kex_parse_kexinit: debug2: Kex_parse_kexinit: debug2: Kex_parse_kexinit: first_kex_follows 0 debug2: Kex_parse_kexinit: reserved 0 debug2: mac_setup: found hmac-md5 debug1: Kex: server->client aes128-ctr hmac-md5 none debug2: mac_setup: found hmac-md5 debug1: Kex: server->client aes128-ctr hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug3: Wrote 24 bytes for a total of 1005 debug2: dh_gen_key: priv key bits set 123/256 debug2: bits set: 527/1024 debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug3: Wrote 144 bytes for a total of 1149 debug3: check_host_in_hostfile: host master filename /root/.ssh/known_hosts debug3: check_host_in_hostfile: host master filename /root/.ssh/known_hosts debug3: check_host_in_hostfile: match line 6 debug3: check_host_in_hostfile: host 192.168.0.200 filename /root/.ssh/known_hosts debug3: check_host_in_hostfile: host 192.168.0.200 filename /root/.ssh/known_hosts debug3: check_host_in_hostfile: match line 6 debug1: Host 'master' is known and matches the RSA host key. debug1: Found key in /root/.ssh/known_hosts:6 debug2: bits set: 498/1024 debug1: ssh_rsa_verify: signature correct debug2: Kex_drive_keys debug2: set_newkeys: mode 1 debug1: SSH2_MSG_NEWKEYS sent debug3: Wrote 16 bytes for a total of 1165 debug2: set_newkeys: mode 0 debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_REQUEST sent debug3: wrote 48 bytes for a total of 1213 debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: /root/.ssh/identity ((nil)) debug2: key: /root/.ssh/id_rsa ((nil)) debug2: key: /root/.ssh/id_dsa ((nil)) debug2: key: /root/.ssh/id_ecdsa ((nil)) debug3: worte 64 bytes for a total of 1277 debug1: Authentications that can continue: publickey,gssapi-keyey,gssapi-with-mic,password debug3: start over, passed a different list publickey,gssapi-keyex,gssapi-with-mic,password debug3: preferred host based, publickey,keyboard-inteactive,password debug3: authmethod_lookup publickey debug3: remaining preferred: keyboard-interactive,password debug3: authmethod_is_enabled publickey debug1: Next authentication method: publickey debug1: Trying private key: /root/.ssh/identity debug3: no such identity: /root/.ssh/identity debug1: Trying private key: /root/.ssh/id_rsa debug3: no such identity: /root/.ssh/id_rsa debug1: Trying private key: /root/.ssh/id_dsa debug3: no such identity: /root/.ssh/id_dsa debug1: Trying private key: /root/.ssh/id_ecdsa debug3: no such identity: /root/.ssh/id_ecdsa debug2: we did not send a packet, disable method debug3: authmethod_lookup password debug3: remaining preferred: ,password debug3: authmethod_is_enabled password debug1: Next authentication method: password root@master's password: Terminated |
Does ssh command requires internet connection as a necessity ?
even if I am trying to use the master to access the master itself ? |
No, "internal networking" is via the local loopback adapter i.e localhost or lo (127.0.0.1)
What happens if you try to connect with a normal user. ssh user@master |
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Can the output of #ssh -vvv master written above be helpful ? I still can't figure out how to get ssh to work ? Hope you can help thanks |
What happens if you try to connect with a regular user. Did you create a regular user?
ssh user@master |
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What are you trying to achieve here? Most SSH implementations don't allow root login, especially with password, as that would leave a system open to brute-force attacks. Sorry, I don't have any good links about SSH but hopefully somebody else will as it is well worth reading a bit about things before you start using them and SSH is very useful -- whether you're just connecting a couple of machines at home to swap files or wanting to learn towards a career in Linux. |
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Couldn't open /dev/null: Permission denied so what do you think I shall do ? Thanks |
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Hope somebody can help Thanks |
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If you don't know what SSH is and how it works then please explain why you want to install it. People here will try to help but as far as I am aware none are mind readers so can only do on the information you give. |
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