Lab 5.1 - Copy the public key with ssh-copy-id
I am doing the Lab 5.1 and I try to issue the command
ssh-copy-id [email protected]
I see the message The authenticity of host 'localhost(::1)' can't be established.
Can anyone explain to me what that this message means? Is it expected to appear? What would be the solution?
Comments
-
It appears by this command, you are trying to copy your localhost's key back to itself.
The command "ssh-copy-id" allows you to copy an ssh public key to another machine. What you are doing above is the complete opposite. Your localhost already has the public key. I belive you are confusing your system as to what machine you are trying to copy the public key to.
Try that same command but direct it to another computer on your network, not that one you are on.
https://www.debian.org/doc/manuals/debian-handbook/sect.remote-login.en.html
0 -
The ssh protocol uses a public key to encrypt the information between two hosts. During the startup phase the server sends its public key over to the client to use for encryptyion. This key can be verified manually and after the client has confirmed the key is good it is stored locally on the client in $HOME/.ssh/known_hosts for future reference.What the prompt is telling you is " I the client have recieved a public key from systemX that is not previously known to me. Do you, the human, wish to accept this key? Here is the key fingerprint for your checking convienience." If the answer is "yes" the public key is stored in the known_hosts file. There is an option to disable this checking if desired.
For more information, check the man page for ssh, under the section VERIFYING HOST KEYS.
0
Categories
- 8.8K All Categories
- 13 LFX Mentorship
- 66 LFX Mentorship: Linux Kernel
- 355 Linux Foundation Boot Camps
- 227 Cloud Engineer Boot Camp
- 67 Advanced Cloud Engineer Boot Camp
- 23 DevOps Engineer Boot Camp
- 5 Cloud Native Developer Boot Camp
- 733 Training Courses
- 14 LFC110 Class Forum
- 16 LFD102 Class Forum
- 96 LFD103 Class Forum
- 2 LFD121 Class Forum
- 55 LFD201 Class Forum
- 1 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum
- 14 LFD254 Class Forum
- 422 LFD259 Class Forum
- 78 LFD272 Class Forum
- 1 LFD272-JP クラス フォーラム
- 15 LFS200 Class Forum
- 685 LFS201 Class Forum
- LFS201-JP クラス フォーラム
- 271 LFS211 Class Forum
- 50 LFS216 Class Forum
- 23 LFS241 Class Forum
- 26 LFS242 Class Forum
- 18 LFS243 Class Forum
- 4 LFS244 Class Forum
- 7 LFS250 Class Forum
- LFS250-JP クラス フォーラム
- 105 LFS253 Class Forum
- 753 LFS258 Class Forum
- 7 LFS258-JP クラス フォーラム
- 48 LFS260 Class Forum
- 75 LFS261 Class Forum
- 6 LFS262 Class Forum
- 76 LFS263 Class Forum
- 14 LFS264 Class Forum
- 10 LFS266 Class Forum
- 8 LFS267 Class Forum
- 8 LFS268 Class Forum
- 5 LFS269 Class Forum
- 173 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- 184 LFW211 Class Forum
- 100 LFW212 Class Forum
- 876 Hardware
- 205 Drivers
- 74 I/O Devices
- 43 Monitors
- 115 Multimedia
- 204 Networking
- 98 Printers & Scanners
- 82 Storage
- 716 Linux Distributions
- 78 Debian
- 64 Fedora
- 12 Linux Mint
- 13 Mageia
- 22 openSUSE
- 125 Red Hat Enterprise
- 33 Slackware
- 13 SUSE Enterprise
- 344 Ubuntu
- 445 Linux System Administration
- 33 Cloud Computing
- 63 Command Line/Scripting
- Github systems admin projects
- 88 Linux Security
- 73 Network Management
- 105 System Management
- 45 Web Management
- 50 Mobile Computing
- 18 Android
- 19 Development
- 1.2K New to Linux
- 1.1K Getting Started with Linux
- 499 Off Topic
- 119 Introductions
- 193 Small Talk
- 19 Study Material
- 743 Programming and Development
- 237 Kernel Development
- 472 Software Development
- 899 Software
- 245 Applications
- 178 Command Line
- 2 Compiling/Installing
- 72 Games
- 313 Installation
- 19 All In Program
- 19 All In Forum
Upcoming Training
-
August 20, 2018
Kubernetes Administration (LFS458)
-
August 20, 2018
Linux System Administration (LFS301)
-
August 27, 2018
Open Source Virtualization (LFS462)
-
August 27, 2018
Linux Kernel Debugging and Security (LFD440)