Ubuntu
帶有 Cron 的 SSH：不接受 RSA 密鑰
我正在嘗試讓 ssh 工作
cron，似乎我已經嘗試了所有標準技巧，但一點運氣都沒有。我可以通過使用執行非互動式 ssh>./some_script_with_ssh在重擊中。只有當我嘗試使用它時
cron它才會失敗。我能得到的任何幫助將不勝感激。以下是類似問題中要求的一些數據：
我的使用者的 crontab
PATH = /home/zach/.ssh/:/usr/bin 52 * * * * ssh -vvv my_account@my_remote "touch temp.temp"從發送給我的電子郵件 cron 的列印輸出
OpenSSH_7.3p1 Ubuntu-1, OpenSSL 1.0.2g 1 Mar 2016 debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: Applying options for * debug2: resolving "my_remote" port 22 debug2: ssh_connect_direct: needpriv 0 debug1: Connecting to my_remote [IP_HERE] port 22. debug1: Connection established. debug1: identity file /home/zach/.ssh/id_rsa type 1 debug1: key_load_public: No such file or directory debug1: identity file /home/zach/.ssh/id_rsa-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_7.3p1 Ubuntu-1 debug1: Remote protocol version 2.0, remote software version OpenSSH_6.2 debug1: match: OpenSSH_6.2 pat OpenSSH* compat 0x04000000 debug2: fd 3 setting O_NONBLOCK debug1: Authenticating to my_remote:22 as 'my_account' debug3: hostkeys_foreach: reading file "/home/zach/.ssh/known_hosts" debug3: record_hostkey: found key type ECDSA in file /home/zach/.ssh/known_hosts:1 debug3: load_hostkeys: loaded 1 keys from my_remote debug3: order_hostkeyalgs: prefer hostkeyalgs: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,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@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,ext-info-c debug2: host key algorithms: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc,3des-cbc debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,aes192-cbc,aes256-cbc,3des-cbc debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: compression ctos: none,zlib@openssh.com,zlib debug2: compression stoc: none,zlib@openssh.com,zlib debug2: languages ctos: debug2: languages stoc: debug2: first_kex_follows 0 debug2: reserved 0 debug2: peer server KEXINIT proposal debug2: KEX algorithms: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: host key algorithms: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256 debug2: ciphers ctos: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se debug2: ciphers stoc: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se debug2: MACs ctos: hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: MACs stoc: hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: compression ctos: none,zlib@openssh.com debug2: compression stoc: none,zlib@openssh.com debug2: languages ctos: debug2: languages stoc: debug2: first_kex_follows 0 debug2: reserved 0 debug1: kex: algorithm: ecdh-sha2-nistp256 debug1: kex: host key algorithm: ecdsa-sha2-nistp256 debug1: kex: server->client cipher: aes128-ctr MAC: umac-64-etm@openssh.com compression: none debug1: kex: client->server cipher: aes128-ctr MAC: umac-64-etm@openssh.com compression: none debug3: send packet: type 30 debug1: sending SSH2_MSG_KEX_ECDH_INIT debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug3: receive packet: type 31 debug1: Server host key: ecdsa-sha2-nistp256 SHA256:K8vzLDbyV5JKlcnHsIj6BK/yR4OTJaY4fFuHpsg0FdE debug3: hostkeys_foreach: reading file "/home/zach/.ssh/known_hosts" debug3: record_hostkey: found key type ECDSA in file /home/zach/.ssh/known_hosts:1 debug3: load_hostkeys: loaded 1 keys from my_remote debug3: hostkeys_foreach: reading file "/home/zach/.ssh/known_hosts" debug3: record_hostkey: found key type ECDSA in file /home/zach/.ssh/known_hosts:2 debug3: load_hostkeys: loaded 1 keys from 128.97.70.146 debug1: Host 'my_remote' is known and matches the ECDSA host key. debug1: Found key in /home/zach/.ssh/known_hosts:1 debug3: send packet: type 21 debug2: set_newkeys: mode 1 debug1: rekey after 4294967296 blocks debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug3: receive packet: type 21 debug2: set_newkeys: mode 0 debug1: rekey after 4294967296 blocks debug1: SSH2_MSG_NEWKEYS received debug2: key: /home/zach/.ssh/id_rsa (0x55f6f6440f50) debug3: send packet: type 5 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,gssapi-with-mic,password,keyboard-interactive debug3: start over, passed a different list publickey,gssapi-with-mic,password,keyboard-interactive debug3: preferred publickey,keyboard-interactive debug3: authmethod_lookup publickey debug3: remaining preferred: keyboard-interactive debug3: authmethod_is_enabled publickey debug1: Next authentication method: publickey debug1: Offering RSA public key: /home/zach/.ssh/id_rsa debug3: send_pubkey_test debug3: send packet: type 50 debug2: we sent a publickey packet, wait for reply debug3: receive packet: type 60 debug1: Server accepts key: pkalg ssh-rsa blen 279 debug2: input_userauth_pk_ok: fp SHA256:jsePXa9FO8c9f0bVwdgvXMJQ2GyHVqz5spaO13EQ0/M debug3: sign_and_send_pubkey: RSA SHA256:jsePXa9FO8c9f0bVwdgvXMJQ2GyHVqz5spaO13EQ0/M debug1: read_passphrase: can't open /dev/tty: No such device or address debug2: no passphrase given, try next key debug2: we did not send a packet, disable method debug3: authmethod_lookup keyboard-interactive debug3: remaining preferred: debug3: authmethod_is_enabled keyboard-interactive debug1: Next authentication method: keyboard-interactive debug2: userauth_kbdint debug3: send packet: type 50 debug2: we sent a keyboard-interactive packet, wait for reply debug3: receive packet: type 60 debug2: input_userauth_info_req debug2: input_userauth_info_req: num_prompts 1 debug1: read_passphrase: can't open /dev/tty: No such device or address debug3: send packet: type 61 debug3: receive packet: type 51 debug1: Authentications that can continue: publickey,gssapi-with-mic,password,keyboard-interactive debug2: userauth_kbdint debug3: send packet: type 50 debug2: we sent a keyboard-interactive packet, wait for reply debug3: receive packet: type 60 debug2: input_userauth_info_req debug2: input_userauth_info_req: num_prompts 1 debug1: read_passphrase: can't open /dev/tty: No such device or address debug3: send packet: type 61 debug3: receive packet: type 51 debug1: Authentications that can continue: publickey,gssapi-with-mic,password,keyboard-interactive debug2: userauth_kbdint debug3: send packet: type 50 debug2: we sent a keyboard-interactive packet, wait for reply debug3: receive packet: type 60 debug2: input_userauth_info_req debug2: input_userauth_info_req: num_prompts 1 debug1: read_passphrase: can't open /dev/tty: No such device or address debug3: send packet: type 61 debug3: receive packet: type 51 debug1: Authentications that can continue: publickey,gssapi-with-mic,password,keyboard-interactive debug2: we did not send a packet, disable method debug1: No more authentication methods to try. Permission denied (publickey,gssapi-with-mic,password,keyboard-interactive).本地 RSA 數據的權限
>ls -l ~/.ssh/ total 12 -rw------- 1 zach zach 1766 Dec 22 13:47 id_rsa -rw-r--r-- 1 zach zach 419 Dec 4 2015 id_rsa.pub -rw-r--r-- 1 zach zach 1332 Dec 21 13:51 known_hosts本地住宅的權限
>ls -l ~/.. total 20 drwx------ 2 root root 16384 Jul 17 2015 lost+found drwx------ 67 zach zach 4096 Dec 22 16:05 zach本地 ~/.ssh 文件夾的權限
drwx------ 2 zach zach 4096 Dec 22 15:11 .ssh遠端家庭的權限
drwx------ 31 my_account grad 4096 Dec 22 13:57 my_account遠端 RSA 數據的權限
> ls -l ~/.ssh/ total 12 -rwx------ 1 my_account grad 419 Dec 4 2015 authorized_keys -rw------- 1 my_account grad 36 Dec 20 22:45 config -rw------- 1 my_account grad 223 Sep 10 14:51 known_hosts遠端 ~/.ssh 文件夾的權限
> ls -l ~ drwx------ 2 my_account grad 4096 Dec 20 22:45 .ssh當地的
/etc/ssh/ssh_confighost * passwordauthentication no stricthostkeychecking no identityfile ~/.ssh/id_rsa sendenv lang lc_* hashknownhosts yes偏僻的
/etc/ssh/ssh_config> cat /etc/ssh/ssh_config Host * Protocol 2 ServerAliveInterval 120 TCPKeepAlive no ConnectTimeout 5 NoHostAuthenticationForLocalhost yes PreferredAuthentications gssapi-with-mic,publickey,keyboard-interactive,password GSSAPIAuthentication yes SendEnv "LOGNAME LANG LC_*" ForwardX11Trusted yes我的 ssh 密鑰沒有密碼保護。
>env | grep SSH SSH_AGENT_LAUNCHER=gnome-keyring SSH_AUTH_SOCK=/run/user/1000/keyring/ssh (I am user 1000)我還嘗試使用 ssh 的
-n、-T、-t和-t -t選項，沒有明顯區別。
debug1: Offering RSA public key: /home/zach/.ssh/id_rsa debug3: send_pubkey_test debug3: send packet: type 50 debug2: we sent a publickey packet, wait for reply debug3: receive packet: type 60 debug1: Server accepts key: pkalg ssh-rsa blen 279 debug2: input_userauth_pk_ok: fp SHA256:jsePXa9FO8c9f0bVwdgvXMJQ2GyHVqz5spaO13EQ0/M debug3: sign_and_send_pubkey: RSA SHA256:jsePXa9FO8c9f0bVwdgvXMJQ2GyHVqz5spaO13EQ0/M debug1: read_passphrase: can't open /dev/tty: No such device or address debug2: no passphrase given, try next key您的密鑰受密碼保護，但您可能沒有註意到，因為您正在使用
gnome-keyring它來解決這個問題。那麼有哪些可能性：
- 為 cron 作業使用未加密的單獨密鑰，因為您仍然沒有合理且安全的方式如何在 cron 作業中提供密碼。這是首選。
- 如果您不介意以明文形式儲存密碼，請使用
sshpass：sshpass -p your_passhprase -vvv my_account@my_remote "touch temp.temp"
- 其他可能性是嘗試“劫持”與您的連接
gnome-keyring（使用SSH_AUTH_SOCK環境變數）。但請注意，這可能並不總是有效（一旦您退出圖形會話，gnome-keyring將不再執行，您將再次看到失敗：SSH_AUTH_SOCK=/run/user/1000/keyring/ssh ssh -vvv my_account@my_remote "touch temp.temp"