我正在从服务器 A 发送一些文件到服务器 B。
我创建了一个密钥文件，以便我可以非常轻松地从 A 到 B 使用 ssh。
然后我使用 scp 和 rsync 发送文件。
之前运行得很好，但突然就不行了。没有错误消息。我执行命令后机器就安静了（与我输入的命令完全相同，因为我把它保存在一个.sh文件中）。
更新2：
在接收端，日志来自/var/log/secure：
Jan 26 04:14:14 localhost sshd[17125]: Accepted publickey for root from *.*.*.* port ***** ssh2
Jan 26 04:14:15 localhost sshd[17125]: pam_unix(sshd:session): session opened for user root by (uid=0)
在发送端，的日志scp -v为：
➜ ~/megit:(master) ✗ scp -v /root/***.json root@*.*.*.*:/root/***.json
Executing: program /usr/bin/ssh host *.*.*.*, user root, command scp -v -t /root/***.json
OpenSSH_6.0p1 Debian-4+deb7u2, OpenSSL 1.0.1t 3 May 2016
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to *.*.*.* [*.*.*.*] port 22.
debug1: Connection established.
debug1: permanently_set_uid: 0/0
debug1: identity file /root/.ssh/id_rsa type 1
debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-2048
debug1: Checking blacklist file /etc/ssh/blacklist.RSA-2048
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: identity file /root/.ssh/id_ecdsa type -1
debug1: identity file /root/.ssh/id_ecdsa-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.3
debug1: match: OpenSSH_5.3 pat OpenSSH_5*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.0p1 Debian-4+deb7u2
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: Server host key: RSA **:**:**:**:**:**:**:**:**:**:**:**:**:**:**
debug1: Host '*.*.*.*' is known and matches the RSA host key.
debug1: Found key in /root/.ssh/known_hosts:31
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
No Kerberos credentials available
debug1: Unspecified GSS failure. Minor code may provide more information
No Kerberos credentials available
debug1: Unspecified GSS failure. Minor code may provide more information
debug1: Unspecified GSS failure. Minor code may provide more information
No Kerberos credentials available
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /root/.ssh/id_rsa
debug1: Server accepts key: pkalg ssh-rsa blen 279
debug1: read PEM private key done: type RSA
debug1: Authentication succeeded (publickey).
Authenticated to *.*.*.* ([*.*.*.*]:22).
debug1: channel 0: new [client-session]
debug1: Requesting [email protected]
debug1: Entering interactive session.
debug1: Sending environment.
debug1: Sending env LANG = en_US.UTF-8
debug1: Sending env LC_ALL = en_US.UTF-8
debug1: Sending env LC_CTYPE = en_US.UTF-8
debug1: Sending command: scp -v -t /root/***.json
有什么方法可以调试这个吗？（例如任何内部错误、消息、日志）
非常感谢！