SCP在.bashrc中回声时不工作？

我有两个用户在Fedora：

(i)Wani
(ii)根(很明显！)

我的用户Wani的.bashrc的内容是：

# .bashrc
 echo "Hello"
 # Source global definitions
 if [ -f /etc/bashrc ]; then
    . /etc/bashrc
 fi

 # User specific aliases and functions

现在登录到root后，我键入以下命令：

[root@Dell Wani]#touch try.txt
 [root@Dell Wani]#service sshd start
 [root@Dell Wani]#scp try.txt Wani@localhost:~/
 Wani@localhost's password: 
 Hello
 [root@Dell Wani]#

现在我登录到Wani，然后键入：

[Wani@Dell ~]$ cat try.txt
 cat: try.txt: No such file or directory
 [Wani@Dell ~]$

现在我再次登录到root并使用-v键入相同的命令：

[root@Dell Wani]# scp -v morph.log Wani@localhost:
 Executing: program /usr/bin/ssh host localhost,user Wani,command scp -v -t -- .
 OpenSSH_5.6p1,OpenSSL 1.0.0j-fips 10 May 2012
 debug1: Reading configuration data /etc/ssh/ssh_config
 debug1: Applying options for *
 debug1: Connecting to localhost [127.0.0.1] port 22.
 debug1: Connection established.
 debug1: permanently_set_uid: 0/0
 debug1: identity file /root/.ssh/id_rsa type -1
 debug1: identity file /root/.ssh/id_rsa-cert type -1
 debug1: identity file /root/.ssh/id_dsa type -1
 debug1: identity file /root/.ssh/id_dsa-cert type -1
 debug1: Remote protocol version 2.0,remote software version OpenSSH_5.6
 debug1: match: OpenSSH_5.6 pat OpenSSH*
 debug1: Enabling compatibility mode for protocol 2.0
 debug1: Local version string SSH-2.0-OpenSSH_5.6
 debug1: SSH2_MSG_KEXINIT sent
 debug1: SSH2_MSG_KEXINIT received
 debug1: kex: server->client aes128-ctr hmac-md5 none
 debug1: kex: client->server aes128-ctr 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 'localhost' is known and matches the RSA host key.
 debug1: Found key in /root/.ssh/known_hosts:2
 debug1: ssh_rsa_verify: signature correct
 debug1: SSH2_MSG_NEWKEYS sent
 debug1: expecting SSH2_MSG_NEWKEYS
 debug1: SSH2_MSG_NEWKEYS received
 debug1: Roaming not allowed by server
 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
 Credentials cache file '/tmp/krb5cc_0' not found

 debug1: Unspecified GSS failure.  Minor code may provide more information
 Credentials cache file '/tmp/krb5cc_0' not found

 debug1: Unspecified GSS failure.  Minor code may provide more information


 debug1: Unspecified GSS failure.  Minor code may provide more information


 debug1: Next authentication method: publickey
 debug1: Trying private key: /root/.ssh/id_rsa
 debug1: Trying private key: /root/.ssh/id_dsa
 debug1: Next authentication method: password
 Wani@localhost's password: 
 debug1: Authentication succeeded (password).
 Authenticated to localhost ([127.0.0.1]:22).
 debug1: channel 0: new [client-session]
 debug1: Requesting [e-mail]
 debug1: Entering interactive session.
 debug1: Sending environment.
 debug1: Sending env XMODIFIERS = @im=none
 debug1: Sending env LANG = en_US.UTF-8
 debug1: Sending command: scp -v -t -- .
 Hello
 [root@Dell Wani]# debug1: client_input_channel_req: channel 0 rtype exit-status      reply      0
 debug1: channel 0: free: client-session,nchannels 1
 debug1: fd 0 clearing O_NONBLOCK
 debug1: fd 1 clearing O_NONBLOCK
 Transferred: sent 1664,received 1976 bytes,in 0.1 seconds
 Bytes per second: sent 22961.5,received 27266.8
 debug1: Exit status 0

(然后按Enter键)

[root@Dell Wani]#

任何人都可以告诉我们这里发生了什么？为什么文件不能从根目录复制到Wani？

在.bashrc中使用echo会破坏scp，因为scp希望在stdin / stdout通道上看到它的协议数据。有关此问题的更多讨论，请参阅 https://bugzilla.redhat.com/show_bug.cgi?id=20527。

有几个可用的解决方法：

>条件在“交互式”标志(例如案件$ – 在* i *由三人建议)
>使用tty实用程序来检测交互式shell(例如，如果tty> / dev / null或if [-t 0])
>检查$ SSH_TTY的值

我想你应该使用任何一个为你工作。我不知道什么是最好的(最便携/最可靠)选项，不幸的是。