How do I regenerate OpenSSH sshd server host keys stored in /etc/ssh/ssh_host_* files under Debian Linux server? Can I safely regenerate ssh host keys using remote ssh session as my existing ssh connections shouldn’t be interrupted?
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FAQ tagged as:
system administrator
I‘ve reinstalled Linux on remote server and now trying to connect it over ssh using Mac OS X:
ssh user@server1.example.com
But I’m getting an error which read as follows:
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ 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 is
5c:9b:16:56:a6:cd:11:10:3a:cd:1b:a2:91:cd:e5:1c.
Please contact your system administrator.
Add correct host key in /Users/user/.ssh/known_hosts to get rid of this message.
Offending key in /Users/user/.ssh/known_hosts:1
RSA host key for server1.example.com has changed and you have requested strict checking.
Host key verification failed.
How do I fix this problem under Mac OS X?
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Q. I am trying to copy a file called act.dat and I am getting an error “file size limit exceeded” under Linux. How do I get rid of this error? In addition, I do have enough disk space to copy this file.
A. Your system administrator must have imposed limitation on your account for file size [...]
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Q. Can you explain the role of the system administrator?
A. The person who is responsible for setting up and maintaining the system is called as the system administrator. System administrators may be members of an information technology department. Most of the following discussion also applies to network and Windows system admins.
Duties of a system administrator
The [...]
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