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为什么我不能scp到特定的机器?

scp ssh linux

mgibson · 技术社区 · 8 年前

我有一台机器,我似乎无法scp到,但我可以SSH到。我试过从两台不同的机器上执行scping。我得到的基本输出是:

scp /tmp/file dest@IP:/tmp

Password:
IP Address:

当我向scp添加一些调试标志时,我可以看到一些失败消息,但我不确定它们的含义:

Password:
debug2: input_userauth_info_req
debug2: input_userauth_info_req: num_prompts 0
debug1: Authentication succeeded (keyboard-interactive).
Authenticated to <IP> ([<IP>]:22).
debug2: fd 4 setting O_NONBLOCK
debug2: fd 5 setting O_NONBLOCK
debug1: channel 0: new [client-session]
debug2: channel 0: send open
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug2: callback start
debug2: fd 3 setting TCP_NODELAY
debug2: client_session2_setup: id 0
debug1: Sending environment.
debug1: Sending env LANG = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug1: Sending command: scp -v -t /tmp
debug2: channel 0: request exec confirm 1
debug2: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
debug2: channel 0: rcvd adjust 2097152
debug2: channel_input_status_confirm: type 99 id 0
debug2: exec request accepted on channel 0
IP Address:
debug2: channel 0: read<=0 rfd 4 len 0
debug2: channel 0: read **failed**
debug2: channel 0: close_read
debug2: channel 0: input open -> drain
debug2: channel 0: ibuf empty
debug2: channel 0: send eof
debug2: channel 0: input drain -> **closed**
user:current_dir # debug2: channel 0: write **failed**
debug2: channel 0: close_write
debug2: channel 0: send eow
debug2: channel 0: output open -> **closed**
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
debug2: channel 0: rcvd eof
debug2: channel 0: rcvd close
debug2: channel 0: almost dead
debug2: channel 0: gc: notify user
debug2: channel 0: gc: user detached
debug2: channel 0: send close
debug2: channel 0: is dead
debug2: channel 0: garbage collecting
debug1: channel 0: free: client-session, nchannels 1
debug1: fd 0 clearing O_NONBLOCK
debug1: fd 1 clearing O_NONBLOCK
Transferred: sent 2660, received 2380 bytes, in 0.1 seconds
Bytes per second: sent 40626.2, received 36349.8
debug1: Exit status 0

任何信息都将不胜感激!

3 回复 | 直到 8 年前

mgibson 8 年前

这是因为我试图scp to的机器上的.bashrc正在寻找一个别名shell脚本,该脚本有一个 回波变量 命令移除回声解决了问题。

Stian Skjelstad 8 年前

scp不使用sftp协议,但需要scp存在并安装在接收器上(它将在接收主机的shell中生成scp命令)

Community CDub 8 年前

Authenticated to <IP> ([<IP>]:22).
...
debug1: Entering interactive session.
...
debug2: exec request accepted on channel 0
IP Address:

这些都表明您已成功通过远程系统的身份验证并在那里启动了会话。“IP地址:”提示符必须来自会话中远程系统上运行的程序。

简而言之,当您登录时,远程系统会自动启动一个专用程序。这将阻止scp和其他通过ssh启动的程序工作,除非该程序 special steps to permit them to work .

我猜远程系统设置为“ jump server “。它会提示您输入要连接的另一台计算机的IP地址。当您输入IP地址时,它会与该系统建立ssh连接(或重新启动,或其他)。

无论该计划的目的是什么,如果不知道该计划是如何启动的,就不可能说出如何解决它。如果您有向系统复制文件或从系统复制文件的合法需要,您应该与远程系统的管理员联系。