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Vigneshvar Subramanian
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Vigneshvar's posts

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Apply SSL Certificate via HAproxy
Hi Again, Just thought to share, how a SSL certificate is applied to
HAproxy LB First we need to generate “pem” file which includes private
key  from “pfx”. It promts for password # openssl pkcs12
-in dummy.pfx -out dummy.pem  -nodes Note: pem file which in...

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Centos - How to undo a package Installation - Yum   Hi Friends, Yesterday someone in my server, accidently updated libvirt packages while trying to install something else. Puff !!! All my VMs started failing on reboot Identified that verions of libvirt and ...

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OpenStack - Do you know how to evacuate Instances from server which has gone down - "nova host-evacuate"
Hello again, Recently my server running openstack-compute had to be brought down for maintenance (which was running some 60 VMs). This is when i learnt how to use "nova evacuate" This is a cool feature in openstack using which you can get back instances fro...

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Cool aliases that i found from my friend's GitHub
Hey Guys, If you are a linux fan, you probably will love these aliases (short cuts or short forms of commands) https://github.com/rushiagr/myutils/tree/master/aliases If you are tired to copy it to your system, just use the script below to install these ali...

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Really Cool Python debugging Tool - "PUDB"
Hi once again, I came across this really cool python debugging tool called " PUDB ". Now i would rather say am using this tool for every code trace on openstack. " PuDB is a full-screen, console-based visual debugger for Python.
Its goal is to provide all t...

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"apt-mirror" does not understand non standard port
Hey, Today when i was setting up configuration for apt-mirror, i faced this problem of apt-mirror not recognizing non-standard port. I thought i would post the fix for the bug, as this might be helpful for others as well Step 1: Edit the apt-mirror script #...

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Hi everybody, Today i came across a situation, that my network interface(s) number gets incremented when ever i clone my virtual machine (by virtual box or other means). For some or the other reason certain people do not like their interfaces to be changed....

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Seagate Backup Plus Not Getting Detected in Linux
Hi all, Today i just bought my brand new Seagate backup plus 1 TB external hard disk and i was shocked when it did not get detected in my Linux PC. At first i was thinking, there was some fault with the drive and i almost started checking the process for cl...

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Postgreql - Import All Tables to CSV
Hi all, Today  i came across a situation where i need to import and export csv to postgresql db and to migrate all tables in a db to csv format. Lets see what i did, Step 1: Change to 'postgres user' # su postgres Step 2: Login to a database (In my case i u...
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