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Top Forums UNIX for Advanced & Expert Users How to generate expiring SSH Key ? Post 302676187 by nathsaba on Tuesday 24th of July 2012 08:05:06 AM
Old 07-24-2012
How to generate expiring SSH Key ?

Hi Gurus,

I am stuck with a problem here for which I need your expert advice.
I need to generate an SSH key in my Sun OS machine which should expire in 2 years. I usually generate the keys using ssh-keygen -t dsa but the keys generated like this would be non-expiring.

I checked for the man pages for ssh-keygen but could not find an option for expiring the key. Another option I could find was to use ssh-add -t xh option which will expire the key in x hrs. Is this the route I should take ? I want to confirm this first since I need to do this in production environment.

Thanks,
Sabari Nath S
 

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SSH-COPY-ID(1)						      General Commands Manual						    SSH-COPY-ID(1)

NAME
ssh-copy-id - install your public key in a remote machine's authorized_keys SYNOPSIS
ssh-copy-id [-i [identity_file]] [user@]machine DESCRIPTION
ssh-copy-id is a script that uses ssh to log into a remote machine and append the indicated identity file to that machine's ~/.ssh/autho- rized_keys file. If the -i option is given then the identity file (defaults to ~/.ssh/id_rsa.pub) is used, regardless of whether there are any keys in your ssh-agent. Otherwise, if this: ssh-add -L provides any output, it uses that in preference to the identity file. If the -i option is used, or the ssh-add produced no output, then it uses the contents of the identity file. Once it has one or more fin- gerprints (by whatever means) it uses ssh to append them to ~/.ssh/authorized_keys on the remote machine (creating the file, and directory, if necessary.) NOTES
This program does not modify the permissions of any pre-existing files or directories. Therefore, if the remote sshd has StrictModes set in its configuration, then the user's home, ~/.ssh folder, and ~/.ssh/authorized_keys file may need to have group writability disabled manu- ally, e.g. via chmod go-w ~ ~/.ssh ~/.ssh/authorized_keys on the remote machine. SEE ALSO
ssh(1), ssh-agent(1), sshd(8) OpenSSH 14 November 1999 SSH-COPY-ID(1)
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