Recently, I opened an unmanaged VPS hosting account with Digital Ocean (of which I am an affiliate), and created a barebone Debian virtual server. Because the hosting was unmanaged, I had to apply all the system changes to the machine myself. Below were the steps I took to set up the Debian virtual machine after spinning it up for the first time.
On one of my local Ubuntu workstations at home, I sometimes have the need to send mail out using mailutils/mailx inside of scripts or on the command line. I also don't necessarily want/need to set up an entire mail server on my workstation. In addition, Verizon FiOS doesn't take too kindly to this for purposes of preventing malicious activity, SPAM, etc. They actually block outbound connections on the default SMTP port (25).
My colleague Carsten Czarski
>recently presented on the href="https://github.com/oracle/node-oracledb" >node-oracledb
driver for Node.js. One of his demos used WebSockets. It was a live
demo, not captured in slides. I thought I'd explain how I got it to
run in my Oracle Linux 64 bit environment.
ownCloud is enterprise file sync and share that is self-hosted in your data center, on your servers, using your storage. ownCloud provides Universal File Access through a single front-end to all of your disparate systems. Users can access company files on any device, anytime, from anywhere while IT can manage, control and audit file sharing activity to ensure security and compliance measures are met.
WebDAV (Web Distributed Authoring and Versioning) allows you to "mount" your ownCloud content as a local mount point on your local Linux environment.
Our XenServer hypervisors use Nicira/NSX for Software Defined Networking (orchestrated by CloudStack). We had to migrate from one controller to another and that could easily be done by changing the Open vSwitch configuration on the hypervisors, like this: It will then get a list of all nodes and use those to communicate. Although this works, […]
By using –limit argument with ansible-playbook command we can exclude a host from playbook execution.
If hostname starts with “!” it will excluded from host execution.
Lets say if we want to exclude host1 and host2 from ansible-playbook execution use following command:
$ ansible-playbook --limit '!hoost1:!host2' yourPlaybook.yml
To exclude only host1 from execution use following command:
This is a nice Video to explain what is Hadoop in Youtube
netaddr is a Python library for representing and manipulating network addresses.
Installing netaddr library:
Use any of following command to install netaddr library
$ sudo pip install netaddr
$ easy_install netaddr
Observe following example for more details:
Do note that for Red Hat Enterprise Virtualization you must attach a directory server to the Manager using the Domain Management Tool, engine-manage-domains.
Identity Management (IdM)
Red Hat Directory Server 9 (RHDS 9)
# rhevm-manage-domains add --domain=your_active_directory_domain --user=spmstest --ldap-servers=name_or_ip_address_of_AD_Servers --provider=ad
Restart the ovirt-engine