我正在从 ubuntu 20.04 连接到 raspberry pi 4 B，同样在 Ubuntu 20.04 上，telnet 立即死机，可以使用 ssh -T user@host 强制使用 ssh，但是没有提示符，可以通过键入 bash -i 来恢复提示符，但后来我得到了关于没有 pty/tty 的提示，并搜索了几个小时如何恢复 tty 或 pty，结果发现这是一个常见问题，没有通用解决方案。此外，箭头不起作用，虽然可以执行命令，但它并不友好。putty 的工作方式与终端会话一样，箭头和复制粘贴、remina 也能按预期工作。
我问这个问题只是为了通关，我可以使用 remina 而不是 telnet 或 ssh。
我尝试了很多方法，包括将网络添加到 /etc/hosts.allow 以及在许多具有类似错误的站点中找到的大多数解决方案。大多数人在尝试以其他用户身份运行脚本时都会遇到这些错误，我没有这样做。我对这两台机器都有 root 访问权限，它们都在我的防火墙内。
我最喜欢的错误是：bash：无法设置终端进程组 (4978)：设备的 ioctl 不合适 bash：此 shell 中没有作业控制这导致我花了数小时尝试将作业控制添加到 shell，:( 并学习了所有关于进程组的知识这个也很好 sudo：需要终端来读取密码；使用 -S 选项从标准输入读取所以基本上 ssh 和 telnet 不会创建正确的终端。怎么样？为什么？请帮忙……；）
的结果ssh -vvv user@host：
buntu@ubuntu:~$ ssh -vv [email protected]
OpenSSH_8.2p1 Ubuntu-4ubuntu0.1, OpenSSL 1.1.1f 31 Mar 2020
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: include /etc/ssh/ssh_config.d/*.conf matched no files
debug1: /etc/ssh/ssh_config line 21: Applying options for *
debug2: resolve_canonicalize: hostname 192.168.1.241 is address
debug2: ssh_connect_direct
debug1: Connecting to 192.168.1.241 [192.168.1.241] port 22.
debug1: Connection established.
debug1: identity file /home/ubuntu/.ssh/id_rsa type 0
debug1: identity file /home/ubuntu/.ssh/id_rsa-cert type -1
debug1: identity file /home/ubuntu/.ssh/id_dsa type -1
debug1: identity file /home/ubuntu/.ssh/id_dsa-cert type -1
debug1: identity file /home/ubuntu/.ssh/id_ecdsa type -1
debug1: identity file /home/ubuntu/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/ubuntu/.ssh/id_ecdsa_sk type -1
debug1: identity file /home/ubuntu/.ssh/id_ecdsa_sk-cert type -1
debug1: identity file /home/ubuntu/.ssh/id_ed25519 type -1
debug1: identity file /home/ubuntu/.ssh/id_ed25519-cert type -1
debug1: identity file /home/ubuntu/.ssh/id_ed25519_sk type -1
debug1: identity file /home/ubuntu/.ssh/id_ed25519_sk-cert type -1
debug1: identity file /home/ubuntu/.ssh/id_xmss type -1
debug1: identity file /home/ubuntu/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.2p1 Ubuntu-4ubuntu0.1
debug1: Remote protocol version 2.0, remote software version OpenSSH_8.2p1 Ubuntu-4ubuntu0.1
debug1: match: OpenSSH_8.2p1 Ubuntu-4ubuntu0.1 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to 192.168.1.241:22 as 'marc'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: local client KEXINIT proposal
debug2: KEX algorithms: curve25519-sha256,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,ext-info-c
debug2: host key algorithms: [email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],ssh-ed25519,[email protected],rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,[email protected],zlib
debug2: compression stoc: none,[email protected],zlib
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug2: peer server KEXINIT proposal
debug2: KEX algorithms: curve25519-sha256,[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256
debug2: host key algorithms: rsa-sha2-512,rsa-sha2-256,ssh-rsa,ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: ciphers stoc: [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
debug2: MACs ctos: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,[email protected]
debug2: compression stoc: none,[email protected]
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none
debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:AR3puAqOfjZkJiwFOZEtYNcJPBnPcDRtUZhP08OrSz4
debug1: Host '192.168.1.241' is known and matches the ECDSA host key.
debug1: Found key in /home/ubuntu/.ssh/known_hosts:1
debug2: set_newkeys: mode 1
debug1: rekey out after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug2: set_newkeys: mode 0
debug1: rekey in after 134217728 blocks
debug1: Will attempt key: /home/ubuntu/.ssh/id_rsa RSA SHA256:5QNcvcNfqDsoKEAmvzH0FPbFwHcNag9f1IFNLjDjc5w
debug1: Will attempt key: /home/ubuntu/.ssh/id_dsa
debug1: Will attempt key: /home/ubuntu/.ssh/id_ecdsa
debug1: Will attempt key: /home/ubuntu/.ssh/id_ecdsa_sk
debug1: Will attempt key: /home/ubuntu/.ssh/id_ed25519
debug1: Will attempt key: /home/ubuntu/.ssh/id_ed25519_sk
debug1: Will attempt key: /home/ubuntu/.ssh/id_xmss
debug2: pubkey_prepare: done
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,[email protected],ssh-rsa,rsa-sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[email protected]>
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Offering public key: /home/ubuntu/.ssh/id_rsa RSA SHA256:5QNcvcNfqDsoKEAmvzH0FPbFwHcNag9f1IFNLjDjc5w
debug2: we sent a publickey packet, wait for reply
debug1: Authentications that can continue: publickey,password
debug1: Trying private key: /home/ubuntu/.ssh/id_dsa
debug1: Trying private key: /home/ubuntu/.ssh/id_ecdsa
debug1: Trying private key: /home/ubuntu/.ssh/id_ecdsa_sk
debug1: Trying private key: /home/ubuntu/.ssh/id_ed25519
debug1: Trying private key: /home/ubuntu/.ssh/id_ed25519_sk
debug1: Trying private key: /home/ubuntu/.ssh/id_xmss
debug2: we did not send a packet, disable method
debug1: Next authentication method: password
[email protected]'s password:
debug2: we sent a password packet, wait for reply
debug1: Authentication succeeded (password).
Authenticated to 192.168.1.241 ([192.168.1.241]:22).
debug1: channel 0: new [client-session]
debug2: channel 0: send open
debug1: Requesting [email protected]
debug1: Entering interactive session.
debug1: pledge: network
debug1: client_input_global_request: rtype [email protected] want_reply 0
debug2: channel_input_open_confirmation: channel 0: callback start
debug2: fd 3 setting TCP_NODELAY
debug2: client_session2_setup: id 0
debug2: channel 0: request pty-req confirm 1
debug1: Sending environment.
debug1: Sending env LANG = C.UTF-8
debug2: channel 0: request env confirm 0
debug2: channel 0: request shell confirm 1
debug2: channel_input_open_confirmation: channel 0: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
debug2: channel_input_status_confirm: type 99 id 0
debug2: PTY allocation request accepted on channel 0
debug2: channel 0: rcvd adjust 2097152
debug2: channel_input_status_confirm: type 99 id 0
debug2: shell request accepted on channel 0
Welcome to Ubuntu 20.04.1 LTS (GNU/Linux 5.4.0-1019-raspi aarch64)
* Documentation: https://help.ubuntu.com
* Management: https://landscape.canonical.com
* Support: https://ubuntu.com/advantage
System information as of Mon Sep 28 14:17:45 CDT 2020
System load: 0.0
Usage of /: 5.7% of 58.27GB
Memory usage: 8%
Swap usage: 0%
Temperature: 34.6 C
Processes: 177
Users logged in: 2
IPv4 address for eth0: 192.168.1.241
IPv6 address for eth0: 2600:1700:30c1:7cd0::14
IPv6 address for eth0: 2600:1700:30c1:7cd0:dea6:32ff:fe5b:e91b
* Kubernetes 1.19 is out! Get it in one command with:
sudo snap install microk8s --channel=1.19 --classic
https://microk8s.io/ has docs and details.
0 updates can be installed immediately.
0 of these updates are security updates.
Last login: Mon Sep 28 14:05:09 2020 from 192.168.1.241