If the server genuinely only supports SSH-1, then you need to either change the ‘SSH protocol version’ setting (see section 4.18.4), or use the -1 command-line option; in any case, you should not treat the resulting connection as secure. Be replaced by a hostname or an ip address of the server you want to connect to. If not, make sure you are connecting to a server of which you know that you. To connect to the remote server, run a single command and then exit again. The scp command allows you to copy files over ssh connections.
I have some cloud boxes that change their IP frequently.I ssh using the hostname but have to edit the knownhosts file every time the server launches because of this error message: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!Someone could be eavesdropping on you right now (man-in-the-middle attack)!It is also possible that the RSA host key has just been changed.The fingerprint for the RSA key sent by the remote host isAside from any security risks and such that are associated with what I want to do, is there a way to either ignore this error or overwrite the knownhosts file automatically such that I don't always have to edit it myself?
A lot of the answers here will work - but technically they're workarounds. OpenSSH already has a built-in feature with this in mind: HostKeyAlias.In your.ssh/config file, add HostKeyAlias to a host configuration: host myserver.example.comHostKeyAlias myserver.example.comWith this in place, connecting to server myserver.example.com will not use the hostname or the IP address for the local reference - it will always only use the given HostKeyAlias when connecting to that server. For me it makes sense to use the hostname - but you can of course use any alias you like.Typical configs for myself for dynamic hosts are like so: host myserverhostname myserver.dyn.example.comHostKeyAlias myserver.private.example.comThis can also be used in some obscure scenarios where you know a bunch of your servers have the same host keys (generally this should not be the case). This would then prevent duplicate entries. In future, if the keys legitimately change, you don't have to replace/delete multiple entries.
Gitlab Geo servers are a good example of this.Regarding clearing the knownhosts file, I would suggest looking at other questions/answers specifically related to maintaining/removing stale knownhosts entries. For example, see; I'm especially impressed by user1953828's answer, though I see it doesn't have many upvotes (yet).:).
I avoid adding the fingerprints to my knownhosts file when connecting to transient AWS machines. I use a command such as ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -i secret.pem [email protected] connect to them.
It will not ask you if you want to add the machine “to the list of known hosts.” Replace 10.0.0.5 by the IP address of your machine and secret.pem by the full path of your Ssh key. You will still get a warnings that the 10.0.0.5 has been added, but it has really vanished into /dev/null. I do this often enough that I set an alias in my /.profile alias awsssh='ssh -i secret.pem -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no'I reserve ssh [email protected] type commands for machines were I went to the trouble of checking the fingerprint.
. Applies to: Grid. Difficulty: Medium. Time: 20. Tools needed: Account Center access, SSH enabled. Applies to: Managed WordPress.
Difficulty: Medium. Time: 20.
Tools needed: Account Center access. Applies to: DV. Difficulty: Medium. Time: 20. Tools needed: Account Center access, SSH enabled. Applies to: DV Developer. Difficulty: Medium.
Time: 20. Tools needed: Account Center access, SSH. Applies to: DV 4.0. Difficulty: Medium.
Time: 20. Tools needed: Account Center access, SSH enabled. Applies to: (ve). Difficulty: Medium.
Time: 20. Tools needed: Account Center access, SSH. IntroductionSecure Shell (SSH) is a UNIX-based command interface and protocol for securely getting access to a remote computer. SSH is actually a suite of three utilities - slogin, ssh, and scp - that are secure versions of the earlier UNIX utilities, rlogin, rsh, and rcp. SSH commands are encrypted and secure in several ways.
Both ends of the client/server connection are authenticated using a digital certificate, and passwords are protected by being encrypted.SSH allows you to connect to your server securely and perform Linux command-line operations. Instructions Enable SSH accessOn the DV and DV Dedicate-Virtual servers, you have several possible SSH users. Choose the appropriate one for your needs. SSH for FTP userFor domain-specific tasks, you can enable SSH access for the FTP user associated with that domain.
This is the best option if you plan to copy or create web-accessible files. Log into your domain's.
Note the name of your System user, then click FTP Access. Click on your System user. Click on the drop-down menu and select /bin/bash.
Then click OK or Apply to save your changes.SSH for root userFor high-level configuration tasks and server administration, you can enable the root user for your server. This user can modify absolutely everything, so make sure you use it wisely. See for instructions.
SSH using sudoFor high-level tasks coupled with increased security, you can set up a sudo user instead. This user normally functions as a lower-level user, but can perform the same tasks as root when necessary. See for more information. Connect to the serverYou will first need to choose an SSH client.
Mac OS X includes the SSH client Terminal by default. Windows-based Operating Systems do not come with an SSH client by default. We recommend PuTTY. For information, please see:. Linux distributions include support for SSH by default as well. Simply start up a terminal.Login credentialsYou should use the following information to log into the server via SSH (replace 00000 with your site number):.
Server: s00000.gridserver.com. Username: example.com. Password: This is the same as your Server Administrator FTP password. If you need to reset this password.You should use the following information to log into the server via SSH (replace example.com with a domain name that resolves to your server):. Server: example.com or your IP address.
Username: This depends on which user you chose to enable. The root username is just root. Your domain FTP user or a different sudo user will have a custom name depending on what you typed when you created the user. Password: This depends on which user you chose to enable. The root and sudo articles above show how to set a password for those users.
The domain FTP user will have the same password that you use for FTP.If you are new to command-line interfaces, you may want to with some of the commands first.It is standard to hit 'Enter' after each command, to execute it after you finish typing.PuTTY is a free software application for Windows 95, 98, XP, Vista, and 7 which can be used to make an SSH connection to your server. You can download the application at.For detailed instructions on using PuTTY, please read our article on. Open your SSH client.
To initiate a connection, type:ssh username@hostnameReplace 'username' with the username and 'hostname' with the hostname found in the SETTINGS section of your WordPress control panel under SSH & SFTP. Type:ssh [email protected][email protected]. NOTE:If you are trying to connect as a sub-FTP user on the Grid, you will want to use the following command context: ssh subftpuser%[email protected] this case, the username is the full email address. But, you will need to replace the @ symbol in the email address with a% to make sure the command works. Username: subftpuser%example.comPassword: This is the same as your email password. Make sure you use your own domain name or IP address.
If you want a user other than root, type the other username before the @ symbol.Type: ssh [email protected] (IP address version)ssh [email protected] (domain FTP user version)ssh [email protected]. Be sure to replace xxx.xxx.xxx.xxx with your server's IP address. Type:ssh [email protected]. If this is your first time connecting to the server from this computer, you will see the following output. Accept the connection by typing 'yes.' The authenticity of host 'example.com (12.33.45.678)' can't be established.RSA key fingerprint is 3c:6d:5c:99:5d:b5:c6:25:5a:d3:78:8e:d2:f5:7a:01.Are you sure you want to continue connecting (yes/no)?yes.
You will now be prompted to enter your password. Please note that you will NOT see your cursor moving, or any characters typed (such as.), when typing your password. This is a standard Terminal security feature. Hit enter.
You can also copy and paste, using Command+V to paste.Password:. That's it, now you're connected to your Managed WordPress service via SSH. You are now logged into your Grid via SSH. You should see output like this:The programs included with the Debian GNU/Linux system are free software;the exact distribution terms for each program are described in theindividual files in /usr/share/doc/./copyright.Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extentpermitted by applicable law.example.com@n11:$You can begin typing commands at the prompt.