scp報錯 -bash: scp: command not found

環境：RHEL6.5

使用scp命令報錯：

[root@oradb23 media]# scp /etc/hosts oradb24:/etc/
-bash: scp: command not found

查看openssh相關包：

[root@oradb23 ~]# rpm -qa openssh*
openssh-5.3p1-94.el6.x86_64
openssh-server-5.3p1-94.el6.x86_64

發現服務器默認沒有安裝openssh的客戶端。

yum 安裝openssh客戶端

[root@oradb23 ~]# yum install openssh-clients

[root@oradb23 ~]# rpm -qa openssh*
openssh-clients-5.3p1-94.el6.x86_64
openssh-5.3p1-94.el6.x86_64
openssh-server-5.3p1-94.el6.x86_64

yum配置本地源可參考：

# mkdir -p /media/cdrom

# mount -o loop -t iso9660 /opt/rhel-server-6.2-x86_64-dvd.iso /media/cdrom

# vi /etc/yum.repos.d/rhel-source.repo

[ISO]
name=iso
baseurl=file:///media/cdrom/Server/
enabled=1
gpgcheck=0

驗證scp命令可用

[root@oradb23 ~]# scp
usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]
           [-l limit] [-o ssh_option] [-P port] [-S program]
           [[user@]host1:]file1 ... [[user@]host2:]file2

再次執行：

[root@oradb23 ~]# scp /etc/hosts oradb24:/etc/
The authenticity of host 'oradb24 (192.168.1.24)' can't be established.
RSA key fingerprint is e0:fb:fb:67:a0:fc:cd:a5:dc:c8:bc:68:67:b1:93:3f.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'oradb24,192.168.1.24' (RSA) to the list of known hosts.
root@oradb24's password: 
bash: scp: command not found
lost connection

說明oradb24主機同樣沒有安裝openssh客戶端，
在oradb24主機也同樣yum 安裝,確定scp可用

[root@oradb24 ~]# yum install openssh-clients
[root@oradb24 ~]# scp
usage: scp [-1246BCpqrv] [-c cipher] [-F ssh_config] [-i identity_file]
           [-l limit] [-o ssh_option] [-P port] [-S program]
           [[user@]host1:]file1 ... [[user@]host2:]file2

再次嘗試scp拷貝，這次就可以正常拷貝了。

[root@oradb23 ~]# scp /etc/hosts oradb24:/etc/
root@oradb24's password: 
hosts                                                                                                                                                                            100%  380     0.4KB/s   00:00    

說明scp拷貝，兩端都需要保證scp命令可用才可以。