GlusterFS fix faulty bricks

Great tutorial to manage glusterFS


if you are getting error like

volume add-brick: failed: Incorrect number of bricks supplied 1 with count 2

Then you are trying to add  distribute leg, which requires multiple bricks based on replication setting, try following command

gluster vol add-brick <vol-name> <brick1><brick2>


NMAP TLS/SSL cipher suites a particular website offers

List the SSL/TLS cipher suites a particular website offers

 Command Line

Nmap with ssl-enum-ciphers 

This will be a very simple and and  faster way to get a list of available ciphers from a network service.  and nmap will provide a strength rating of strong, weak, or unknown for each available cipher. Which will help to determine overall strength of server security.

nmap --script ssl-enum-ciphers -p 443

To install nmap on osx run : brew install nmap


sslscan is a also nice little utility to get details regarding website ssl.
To install on osx run : brew install sslscan

Online Tool

SSL Labs‘ website also have good tool to test tls/ssl ciphers and other utility.

Source :


OpenSSH 7.3 on CentOs 6.7

A simple script to upgrade OpneSSH on CentOs 6.7.

To use you can run following command with root user

bash <( curl -s )