EC2实例允许我登录后关闭连接

如何解决EC2实例允许我登录后关闭连接

我一直在尝试登录EC2实例。直到我上一堂课，一切都很好。但是现在当我尝试使用ssh登录时，它显示欢迎使用ubuntu ，并且与xxxx.com的连接已关闭。

关闭连接后，我得到了以下内容

debug1: client_input_channel_req: channel 0 rtype exit-signal reply 0
debug1: client_input_channel_req: channel 0 rtype [e-mail] reply 0
debug1: channel 0: free: client-session,nchannels 1
Connection to xx.compute.amazonaws.com closed.
Transferred: sent 2876,received 4196 bytes,in 4.1 seconds
Bytes per second: sent 697.0,received 1016.9
debug1: Exit status -1

某种程度上我可以解决此问题，也无法使用AWS远程会话访问它们。

编辑1-添加完整的ssh调试

OpenSSH_8.1p1,LibreSSL 2.7.3
debug1: Reading configuration data /Users/abhishek/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 47: Applying options for *
debug1: Connecting to xxxx.eu-west-3.compute.amazonaws.com port 22.
debug1: Connection established.
debug1: identity file AbhishekTest.pem type -1
debug1: identity file AbhishekTest.pem-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.1
debug1: Remote protocol version 2.0,remote software version OpenSSH_7.6p1 Ubuntu-4ubuntu0.3
debug1: match: OpenSSH_7.6p1 Ubuntu-4ubuntu0.3 pat OpenSSH_7.0*,OpenSSH_7.1*,OpenSSH_7.2*,OpenSSH_7.3*,OpenSSH_7.4*,OpenSSH_7.5*,OpenSSH_7.6*,OpenSSH_7.7* compat 0x04000002
debug3: fd 5 is O_NONBLOCK
debug1: Authenticating to xxx.eu-west-3.compute.amazonaws.com:22 as 'ubuntu'
debug3: hostkeys_foreach: reading file "/Users/abhishek/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /Users/abhishek/.ssh/known_hosts:30
debug3: load_hostkeys: loaded 1 keys from xxxx.eu-west-3.compute.amazonaws.com
debug3: order_hostkeyalgs: prefer hostkeyalgs: [e-mail],[e-mail],[e-mail],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
debug3: send packet: type 20
debug1: SSH2_MSG_KEXINIT sent
debug3: receive packet: type 20
debug1: SSH2_MSG_KEXINIT received
debug2: local client KEXINIT proposal
debug2: KEX algorithms: curve25519-sha256,[e-mail],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,diffie-hellman-group14-sha1,ext-info-c
debug2: host key algorithms: [e-mail],ecdsa-sha2-nistp521,[e-mail],[e-mail],[e-mail],[e-mail],ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos: [e-mail],aes128-ctr,aes192-ctr,aes256-ctr,[e-mail],[e-mail]
debug2: ciphers stoc: [e-mail],[e-mail]
debug2: MACs ctos: [e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],[e-mail],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: [e-mail],hmac-sha1
debug2: compression ctos: none,[e-mail],zlib
debug2: compression stoc: none,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,diffie-hellman-group14-sha1
debug2: host key algorithms: ssh-rsa,ssh-ed25519
debug2: ciphers ctos: [e-mail],[e-mail]
debug2: compression stoc: none,[e-mail]
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: [e-mail] MAC: <implicit> compression: none
debug1: kex: client->server cipher: [e-mail] MAC: <implicit> compression: none
debug3: send packet: type 30
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug3: receive packet: type 31
debug1: Server host key: ecdsa-sha2-nistp256 SHA256:zgJBfhSG1OJaQv7OeLLZ5RVnfDORICavQN504jQmTr8
debug3: hostkeys_foreach: reading file "/Users/abhishek/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /Users/abhishek/.ssh/known_hosts:30
debug3: load_hostkeys: loaded 1 keys from xxxx.eu-west-3.compute.amazonaws.com
debug3: hostkeys_foreach: reading file "/Users/abhishek/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file /Users/abhishek/.ssh/known_hosts:30
debug3: load_hostkeys: loaded 1 keys from xx.xx.xx.xx
debug1: Host 'xxx.eu-west-3.compute.amazonaws.com' is known and matches the ECDSA host key.
debug1: Found key in /Users/abhishek/.ssh/known_hosts:30
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey out after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug3: receive packet: type 21
debug1: SSH2_MSG_NEWKEYS received
debug2: set_newkeys: mode 0
debug1: rekey in after 134217728 blocks
debug1: Will attempt key: AbhishekTest.pem  explicit
debug2: pubkey_prepare: done
debug3: send packet: type 5
debug3: receive packet: type 7
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,ssh-rsa,ssh-dss,ecdsa-sha2-nistp521>
debug3: receive packet: type 6
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug3: send packet: type 50
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey
debug3: start over,passed a different list publickey
debug3: preferred publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Trying private key: AbhishekTest.pem
debug3: sign_and_send_pubkey: RSA SHA256:kBwEaWBOFN1I8y0vW62EetzdvnYNsT/bnUs9109XIoA
debug3: sign_and_send_pubkey: signing using rsa-sha2-512
debug3: send packet: type 50
debug2: we sent a publickey packet,wait for reply
debug3: receive packet: type 52
debug1: Authentication succeeded (publickey).
Authenticated to xxx.eu-west-3.compute.amazonaws.com ([xx.xx.xx.xx]:22).
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug3: send packet: type 90
debug1: Requesting [e-mail]
debug3: send packet: type 80
debug1: Entering interactive session.
debug1: pledge: network
debug3: receive packet: type 80
debug1: client_input_global_request: rtype [e-mail] want_reply 0
debug3: receive packet: type 91
debug2: channel_input_open_confirmation: channel 0: callback start
debug2: fd 5 setting TCP_NODELAY
debug3: ssh_packet_set_tos: set IP_TOS 0x48
debug2: client_session2_setup: id 0
debug2: channel 0: request pty-req confirm 1
debug3: send packet: type 98
debug1: Sending environment.
debug3: Ignored env TERM_SESSION_ID
debug3: Ignored env SSH_AUTH_SOCK
debug1: Sending env LC_TERMINAL_VERSION = 3.3.12
debug2: channel 0: request env confirm 0
debug3: send packet: type 98
debug3: Ignored env COLORFGBG
debug3: Ignored env ITERM_PROFILE
debug3: Ignored env XPC_FLAGS
debug3: Ignored env PWD
debug3: Ignored env SHELL
debug1: Sending env LC_CTYPE = UTF-8
debug2: channel 0: request env confirm 0
debug3: send packet: type 98
debug3: Ignored env TERM_PROGRAM_VERSION
debug3: Ignored env TERM_PROGRAM
debug3: Ignored env PATH
debug1: Sending env LC_TERMINAL = iTerm2
debug2: channel 0: request env confirm 0
debug3: send packet: type 98
debug3: Ignored env COLORTERM
debug3: Ignored env TERM
debug3: Ignored env HOME
debug3: Ignored env TMPDIR
debug3: Ignored env USER
debug3: Ignored env XPC_SERVICE_NAME
debug3: Ignored env LOGNAME
debug3: Ignored env ITERM_SESSION_ID
debug3: Ignored env __CF_USER_TEXT_ENCODING
debug3: Ignored env SHLVL
debug3: Ignored env OLDPWD
debug3: Ignored env ZSH
debug3: Ignored env PAGER
debug3: Ignored env LESS
debug3: Ignored env LSCOLORS
debug3: Ignored env PERL5LIB
debug3: Ignored env PERL_LOCAL_LIB_ROOT
debug3: Ignored env PERL_MB_OPT
debug3: Ignored env PERL_MM_OPT
debug1: Sending env LC_ALL = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug3: send packet: type 98
debug3: Ignored env LDFLAGS
debug3: Ignored env CONDA_EXE
debug3: Ignored env _CE_M
debug3: Ignored env _CE_CONDA
debug3: Ignored env CONDA_PYTHON_EXE
debug3: Ignored env CONDA_SHLVL
debug3: Ignored env JAVA_HOME
debug3: Ignored env DERBY_HOME
debug3: Ignored env STARSHIP_SHELL
debug3: Ignored env _
debug2: channel 0: request shell confirm 1
debug3: send packet: type 98
debug2: channel_input_open_confirmation: channel 0: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
debug3: receive packet: type 99
debug2: channel_input_status_confirm: type 99 id 0
debug2: PTY allocation request accepted on channel 0
debug2: channel 0: rcvd adjust 2097152
debug3: receive packet: type 99
debug2: channel_input_status_confirm: type 99 id 0
debug2: shell request accepted on channel 0
Welcome to Ubuntu 18.04.4 LTS (GNU/Linux 5.3.0-1032-aws x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

  System information as of Wed Aug 12 10:44:36 UTC 2020

  System load:  0.07               Processes:           118
  Usage of /:   88.5% of 19.32GB   Users logged in:     0
  Memory usage: 46%                IP address for eth0: xx.xx.xx.xx
  Swap usage:   0%

  => / is using 88.5% of 19.32GB

 * Are you ready for Kubernetes 1.19? It's nearly here! Try RC3 with
   sudo snap install microk8s --channel=1.19/candidate --classic

   https://microk8s.io/ has docs and details.

 * Canonical Livepatch is available for installation.
   - Reduce system reboots and improve kernel security. Activate at:
     https://ubuntu.com/livepatch

2 packages can be updated.
0 updates are security updates.


Last login: Wed Aug 12 10:44:24 2020 from xx.xx.xx.xx
debug3: receive packet: type 96
debug2: channel 0: rcvd eof
debug2: channel 0: output open -> drain
debug2: channel 0: obuf empty
debug2: channel 0: chan_shutdown_write (i0 o1 sock -1 wfd 7 efd 8 [write])
debug2: channel 0: output drain -> closed
debug3: receive packet: type 98
debug1: client_input_channel_req: channel 0 rtype exit-signal reply 0
debug3: receive packet: type 98
debug1: client_input_channel_req: channel 0 rtype [e-mail] reply 0
debug2: channel 0: rcvd eow
debug2: channel 0: chan_shutdown_read (i0 o3 sock -1 wfd 6 efd 8 [write])
debug2: channel 0: input open -> closed
debug3: receive packet: type 97
debug2: channel 0: rcvd close
debug3: channel 0: will not send data after close