Linuxbash: scp: commandnotfound problem record

Linuxbash: scp: commandnotfound problem record
1. scp Error

[Root @ localhost soft] # scpjdk-7u55-linux-x64.tar.gz 192.168.121.246:/soft/

Root@192.168.121.246's password:

Bash: scp: command not found

Lost connection

[Root @ localhost soft] #

 

 

2. debug-v

[Root @ localhost soft] # scp -vjdk-7u55-linux-x64.tar.gz 192.168.121.246:/soft/

Executing: program/usr/bin/ssh host192.168.121.246, user (unspecified), command scp-v-t/soft/

OpenSSH_5.3p1, OpenSSL 1.0.1e-fips 11 Feb2013

Debug1: Reading configuration data/etc/ssh/ssh_config

Debug1: Applying options *

Debug1: Connecting to 192.168.121.246 [192.168.121.246] port 22.

Debug1: Connection established.

Debug1: permanently_set_uid: 0/0

Debug1: identity file/root/. ssh/identitytype-1

Debug1: identity file/root/. ssh/identity-cert type-1

Debug1: identity file/root/. ssh/id_rsatype-1

Debug1: identity file/root/. ssh/id_rsa-cert-type-1

Debug1: identity file/root/. ssh/id_dsatype-1

Debug1: identity file/root/. ssh/id_dsa-cert-type-1

Debug1: identity file/root/. ssh/id_ecdsatype-1

Debug1: identity file/root/. ssh/id_ecdsa-cert-type-1

Debug1: Remote protocol version 2.0, remotesoftware version OpenSSH_5.3

Debug1: match: OpenSSH_5.3 pat OpenSSH *

Debug1: Enabling compatibility mode forprotocol 2.0

Debug1: Local version stringSSH-2.0-OpenSSH_5.3

Debug1: SSH2_MSG_KEXINIT sent

Debug1: SSH2_MSG_KEXINIT initialized ed

Debug1: kex: server-> client aes128-ctrhmac-md5 none

Debug1: kex: client-> server aes128-ctrhmac-md5 none

Debug1: SSH2_MSG_KEX_DH_GEX_REQUEST (1024 <1024) 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 '192. 168.121.246 'is known andmatches the RSA host key.

Debug1: Found key in/root/. 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 ed

Debug1: SSH2_MSG_SERVICE_REQUEST sent

Debug1: SSH2_MSG_SERVICE_ACCEPT received ed

Debug1: Authentications that can continue: publickey, gssapi-keyex, gssapi-with-mic, password

Debug1: Next authentication method: gssapi-keyex

Debug1: No valid Key exchange context

Debug1: Next authentication method: gssapi-with-mic

Debug1: Unspecified GSS failure. Minor code may provide more information

Cannot determine realm for numeric hostaddress

 

Debug1: Unspecified GSS failure. Minor code may provide more information

Cannot determine realm for numeric hostaddress

 

Debug1: Unspecified GSS failure. Minor code may provide more information

 

 

Debug1: Unspecified GSS failure. Minor code may provide more information

Cannot determine realm for numeric hostaddress

 

Debug1: Next authentication method: publickey

Debug1: Trying private key:/root/. ssh/identity

Debug1: Trying private key:/root/. ssh/id_rsa

Debug1: Trying private key:/root/. ssh/id_dsa

Debug1: Trying private key:/root/. ssh/id_ecdsa

Debug1: Next authentication method: password

Root@192.168.121.246's password:

 

The following information is displayed:

......

Debug1: Host '192. 168.121.246 'is known andmatches the RSA host key.

Debug1: Found key in/root/. 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 ed

Debug1: SSH2_MSG_SERVICE_REQUEST sent

Debug1: SSH2_MSG_SERVICE_ACCEPT received ed

Debug1: Authentications that can continue: publickey, gssapi-keyex, gssapi-with-mic, password

Debug1: Next authentication method: gssapi-keyex

Debug1: No valid Key exchange context

Debug1: Next authentication method: gssapi-with-mic

......

 

From debug1: No valid Key exchangecontext, we can see that the problem should be the scp problem on the receiving end server.

 

3. Go to the acceptor 121.246 to view the scp

[Root @ localhost ~] # Type scp

-Bash: type: scp: not found

[Root @ localhost ~] #

Sure enough, scp is not recognized. Try yum installation, as shown below. It is invalid:

[Root @ localhost ~] # Yum install-y scp

Loaded plugins: fastestmirror

Loading mirror speeds from cached hostfile

* Base: ftp.sjtu.edu.cn

* Extras: mirrors.163.com

* Updates: centos.ustc.edu.cn

Setting up Install Process

No package scp available.

Error: Nothing to do

[Root @ localhost ~] #

 

Baidu to, yum install scp package, is openssh-clients, so re-install yum

Run yum install openssh-clients *-y to install

 

OK. check and scp can be used, as shown below:

[Root @ localhost ~] # Type scp

Scp is/usr/bin/scp

[Root @ localhost ~] #

 

4. Now the scp is successful on the original server.

[Root @ localhost soft] # scpjdk-7u55-linux-x64.tar.gz 192.168.121.246:/soft/

Root@192.168.121.246's password:

Jdk-7u55-linux-x64.tar.gz 100% 132 MB 131.8 MB/s

[Root @ localhost soft] #

 

5. Summary

Scp is successful. You need to install the scp service on both servers.