Openbsd

I am trying to change my Unix / Linux user account password using the passwd command. But, I am getting the following error:

passwd: pam_chauthtok(): conversation failure

OR

passwd: pam_chauthtok(): error in service module

How do I fix this problem on Unix like operating systems?

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I‘ve recently regenrated and uploaded a new public ssh-key using the ssh-copy-id command. Now I’m getting the following error:

ssh root@server3
Agent admitted failure to sign using the key.
root@server3’s password:

How do I fix this problem?

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How do I install Mozilla Firefox which is a free and open source web browser under OpenBSD operating systems?

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I want to use my local machine as the X server over ssh. But when I try to run ssh -X -v user@server1.example.com to the remote machine, I get the following error:

debug1: Remote: No xauth program; cannot forward with spoofing

How do I fix this problem and use X over ssh?

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How do I install nmap network security and auditing tool under OpenBSD operating system?

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How do I copy a file with a colon punctuation (:) name in it. When I type the following command to copy “file:name.txt” to a remote host called server1:

scp file:name.txt user@server1:/path

I get the following error:

ssh: Could not resolve hostname s: Name or service not known

How do I copy file with scp or rsync with a colon in it?

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Sometime my ssh session just stops working because of the internet connection problem. I tried pressing CTRL+Z and CTRL+C to terminate session, but failed to work. How do I properly kill a hung SSH session without killing my local terminal or using kill command?

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