원격 유닉스 서버에서 ssh 명령을 실행하고 출력을 변수에 저장하고 변수를 인쇄하는 다음 스크립트가 있습니다.
()를 사용하여 전경이나 배경에서 실행하면 세션이 활성 상태인 한 스크립트가 제대로 실행되지만 nohup ./script &세션을 종료하면 "인증 실패 가능성이 너무 높습니다"라는 메시지와 함께 실패합니다.
확인해 보니 ps -ef | grep script백그라운드 프로세스가 /dev/pts1 터미널에 할당되어 있고 이제 "?"가 표시됩니다. 이것은 악마적인 프로세스입니다.
ssh -n 또는 -f 옵션을 확인했지만 동일한 문제가 발생했습니다. SSH 명령은 자동 비밀번호로 실행됩니다.
스크립트: (다음으로 명령을 실행합니다 nohup ./script.sh > script.log 2>&1 &)
#!/usr/bin/ksh
while ture;
do
x=`ssh username@remote_server "ls -l /dir1/dir2/*|wc -l"`
echo "the count is $x"
sleep 2m
done
그 후 ssh -v 옵션을 사용하여 캡처를 시도했는데 실패한 출력을 찾아보십시오. 나는 /dev/tty를 찾을 수 없다는 것을 알았습니다. nohup &를 실행하는 세션을 종료했기 때문에 악마 프로세스에 할당되어 터미널이 없기 때문인 것 같습니다.
debug1: Host 'username' is known and matches the DSA host key.
debug1: Found key in /home/.ssh/known_hosts:15
debug1: rekey after 4294967296 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey after 4294967296 blocks
debug1: pubkey_prepare: ssh_get_authentication_socket: No such file or directory
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/.ssh/id_rsa --------here it was like Offering RSA public key: local_user_name
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: Trying private key: /home/.ssh/id_dsa
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: Trying private key: /home/.ssh/id_ecdsa
debug1: Trying private key: /home/.ssh/id_ed25519
debug1: Next authentication method: keyboard-interactive
debug1: read_passphrase: can't open /dev/tty: No such device or address
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: read_passphrase: can't open /dev/tty: No such device or address
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: read_passphrase: can't open /dev/tty: No such device or address
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: Next authentication method: password
debug1: read_passphrase: can't open /dev/tty: No such device or address
Received disconnect from remote_IP_address:2: Too many authentication failures
Authentication failed.
성공 로그의 요청에 따라 여기에서 편집하십시오.
nohup: ignoring input
OpenSSH_7.4p1, OpenSSL 1.0.1e-fips 11 Feb 2013
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 58: Applying options for *
debug1: Connecting to remote_server [remoteserver_ip] port 22.
debug1: Connection established.
debug1: identity file /home/.ssh/id_rsa type 1
debug1: key_load_public: No such file or directory
debug1: identity file /home/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.4
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.2
debug1: match: OpenSSH_7.2 pat OpenSSH* compat 0x04000000
debug1: Authenticating to remote_server:22 as 'remote_server_user'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: [email protected]
debug1: kex: host key algorithm: ssh-dss
debug1: kex: server->client cipher: aes128-ctr MAC: hmac-sha1 compression: none
debug1: kex: client->server cipher: aes128-ctr MAC: hmac-sha1 compression: none
debug1: kex: [email protected] need=20 dh_need=20
debug1: kex: [email protected] need=20 dh_need=20
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ssh-dss SHA256some_key_goes_here
debug1: Host 'remote_server' is known and matches the DSA host key.
debug1: Found key in /home/.ssh/known_hosts:15
debug1: rekey after 4294967296 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey after 4294967296 blocks
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug1: Next authentication method: publickey
debug1: Offering RSA public key: MY_user_id
debug1: Server accepts key: pkalg rsa-sha2-512 blen 533
debug1: Authentication succeeded (publickey).
Authenticated to remote_server ([remote_server_ip]:22).
debug1: channel 0: new [client-session]
debug1: Requesting [email protected]
debug1: Entering interactive session.
debug1: pledge: network
debug1: client_input_global_request: rtype [email protected] want_reply 0
debug1: Sending environment.
debug1: Sending env LANG = C
debug1: Sending command: MY COMMAND HERE
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
debug1: fd 2 clearing O_NONBLOCK
Transferred: sent 3784, received 2544 bytes, in 0.1 seconds
Bytes per second: sent 37022.5, received 24890.4
debug1: Exit status 0
이 문제를 해결하는 방법을 알려주십시오. 이 문제에 대한 해결책을 제공하기 위해 추가 정보가 필요한 경우 알려주십시오. 로컬 서버: GNU Linux
원격 서버: sunSolaris