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How to check or remove IP address from a hashed known_hosts file?which

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# 1  
Old 05-13-2014
How to check or remove IP address from a hashed known_hosts file?which
Hi,

In my server, the hostname and IP addresses are added to the known_hosts which then be hashed by ssh-keygen -H -f. Is it possible to check if an IP address has already been added to the hashed known_hosts to avoid duplications (I think there will be problems if there are duplicated IP addresses in known_hosts)? Or delete the entry if there are duplicated hostname and IP address in the hashed known_hosts?

Thank you.
# 2  
Old 05-13-2014
Change the ip in ip='186.192.10.122' in the below code to check if the IP is available
Code:
 
awk '$0 ~ ip {print ip " exists in " FILENAME}' ip='186.192.10.122' known_hosts

# 3  
Old 05-15-2014
Quote:
Originally Posted by SriniShoo
Change the ip in ip='186.192.10.122' in the below code to check if the IP is available
Code:
 
awk '$0 ~ ip {print ip " exists in " FILENAME}' ip='186.192.10.122' known_hosts

Thanks for the response, but that won't work as I said the known_hosts is not a plain text, it has been hashed by ssh-keygen.
# 4  
Old 05-15-2014
Check if ssh-keygen on your system supports the -F option. It is used to find hashed hostnames in known_hosts files.
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