Aktivéiert Debugging Modus am SSH fir Konnektivitéitsprobleemer ze léisen
An dësem Artikel wäerte mir Iech weisen wéi Dir de Debugging-Modus aktivéiert wann Dir SSH a Linux leeft. Dëst erlaabt Iech ze gesinn wat tatsächlech entfalt wann Dir en ssh Kommando ausféiert fir mat engem Remote Linux Server mat dem verbose Modus oder Debugging Modus ze verbannen.
Den -v
Schalter vum ssh Client erlaabt Iech ssh am verbose Modus ze lafen, deen Debugging Informatioun iwwer SSH Verbindung Fortschrëtter dréckt, wat wierklech nëtzlech ass fir Debugging Verbindungen, Authentifikatioun an all Konfiguratiounsproblemer. Et gi verschidde Niveaue vu Verbositéit; mat multiple -v
Fändelen erhéicht d'Verbositéit (maximal Verbositéitsniveau ass 3).
De folgende Kommando wäert SSH am éischte Niveau vun der Verbositéit lafen, wat eis vill Debugging Informatioun gëtt wéi gewisen.
[email ~ $ ssh -v [email
OpenSSH_7.2p2 Ubuntu-4ubuntu2.2, OpenSSL 1.0.2g-fips 1 Mar 2016 debug1: Reading configuration data /home/aaronkilik/.ssh/config debug1: /home/aaronkilik/.ssh/config line 18: Applying options for * debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: Applying options for * debug1: Connecting to 192.168.56.10 [192.168.56.10] port 22. debug1: Connection established. debug1: identity file /home/aaronkilik/.ssh/id_rsa type 1 debug1: key_load_public: No such file or directory debug1: identity file /home/aaronkilik/.ssh/id_rsa-cert type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/aaronkilik/.ssh/id_dsa type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/aaronkilik/.ssh/id_dsa-cert type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/aaronkilik/.ssh/id_ecdsa type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/aaronkilik/.ssh/id_ecdsa-cert type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/aaronkilik/.ssh/id_ed25519 type -1 debug1: key_load_public: No such file or directory debug1: identity file /home/aaronkilik/.ssh/id_ed25519-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.2 debug1: Remote protocol version 2.0, remote software version OpenSSH_7.4 debug1: match: OpenSSH_7.4 pat OpenSSH* compat 0x04000000 debug1: Authenticating to 192.168.56.10:22 as 'tecmint' debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: algorithm: [email debug1: kex: host key algorithm: ecdsa-sha2-nistp256 debug1: kex: server->client cipher: [email MAC: compression: [email debug1: kex: client->server cipher: [email MAC: compression: [email debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: ecdsa-sha2-nistp256 SHA256:1778erqyug4tHJa7D6y/Ep4UWsUtNEOBSMaj32k9oO8 debug1: Host '192.168.56.10' is known and matches the ECDSA host key. debug1: Found key in /home/aaronkilik/.ssh/known_hosts:8 debug1: rekey after 134217728 blocks debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: rekey after 134217728 blocks debug1: SSH2_MSG_NEWKEYS received 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,gssapi-keyex,gssapi-with-mic,password debug1: Next authentication method: publickey debug1: Offering RSA public key: /home/aaronkilik/.ssh/id_rsa debug1: Server accepts key: pkalg rsa-sha2-512 blen 279 debug1: Enabling compression at level 6. debug1: Authentication succeeded (publickey). Authenticated to 192.168.56.10 ([192.168.56.10]:22). debug1: channel 0: new [client-session] debug1: Requesting [email debug1: Entering interactive session. debug1: pledge: network debug1: client_input_global_request: rtype [email want_reply 0 debug1: Sending environment. debug1: Sending env LC_PAPER = lg_UG.UTF-8 debug1: Sending env LC_ADDRESS = lg_UG.UTF-8 debug1: Sending env LC_MONETARY = lg_UG.UTF-8 debug1: Sending env LC_NUMERIC = lg_UG.UTF-8 debug1: Sending env LC_TELEPHONE = lg_UG.UTF-8 debug1: Sending env LC_IDENTIFICATION = lg_UG.UTF-8 debug1: Sending env LANG = en_US.UTF-8 debug1: Sending env LC_MEASUREMENT = lg_UG.UTF-8 debug1: Sending env LC_NAME = lg_UG.UTF-8 Last login: Sat Jan 6 16:20:11 2018 from 192.168.56.1
Wann Dir probéiert d'Sessioun auszeginn oder auszeschléissen, gesitt Dir och Debugging Messagen wéi gewisen.
[[email ~]$ exit logout debug1: client_input_channel_req: channel 0 rtype exit-status reply 0 debug1: client_input_channel_req: channel 0 rtype [email reply 0 debug1: channel 0: free: client-session, nchannels 1 Connection to 192.168.56.10 closed. Transferred: sent 3392, received 3120 bytes, in 118.1 seconds Bytes per second: sent 28.7, received 26.4 debug1: Exit status 0 debug1: compress outgoing: raw data 1159, compressed 573, factor 0.49 debug1: compress incoming: raw data 573, compressed 1159, factor 2.02
Als nächst kënnt Dir zousätzlech (Niveau 2 an 3) Verbositéit aktivéieren fir nach méi Debugging Messagen wéi gewisen.
$ ssh -vv [email $ ssh -vvv [email
Dat ass et! Fir méi Benotzung vu SSH, liest dës folgend verbonne Artikelen.
- Wéi fannt Dir all gescheitert SSH Login Versuche am Linux
- Wéi de SSH Root Login op Linux auszeschalten
- SSH Passwuertlos Login Mat SSH Keygen a 5 einfache Schrëtt
- Wéi trennt een Inaktiv oder Idle SSH Verbindungen op Linux
Mir hoffen Dir fannt dësen Artikel hëllefräich. Dir kënnt all Froen stellen oder Gedanken deelen iwwer de Kommentarformular hei drënner.