1,scp报错
[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，调试-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 for *
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 received
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<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 '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
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
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:
看到例如以下信息：
......
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
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
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
......
从debug1: No valid Key exchangecontext能够看出问题应该出在接收端server上的scp问题。
3，去接收端121.246上面查看scp
[root@localhost ~]# type scp
-bash: type: scp: not found
[root@localhost ~]#
果然不识别scp，试试yum安装，例如以下所看到的，无效：
[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到，yum安装scp包，是openssh-clients，所以又一次yum安装
运行yum install openssh-clients* -y安装
ok。在check，scp已经能用了。例如以下所看到的
[root@localhost ~]# type scp
scp is /usr/bin/scp
[root@localhost ~]#
4，如今原来的server上scp就能成功了
[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% 132MB 131.8MB/s 00:01
[root@localhost soft]#
5，总结
scp成功，须要两个server都安装了scp服务才行。