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Archived Sun SysAdmin Articles
28 May 2014
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Solaris 11.2: Time based access limitations [36631]
Lesser known facts about Solaris

"Let's assume you want to limit ssh login for user junior to a certain timespan, let's say weekdays between 13:10 and 17:00. With Solaris 11.2 it's really easy to limit access to certain services based on times.

To enforce this, you can set access_time for certain PAM services for the use junior like this. The limitation is done by the pam_unix_account.so module and the man page states: ..."
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25 May 2014
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DNS client configuration steps in Oracle Solaris 11 [36630]
By Gurubalan Thangapandian

This guide covers Quick how to configure DNS client on Solaris 11.

DNS client configuration in Solaris 11 is based on SMF service rather than file based. When you configure a system as DNS client, you will be performing the following two configurations.

I. DNS client setup

II. Configure Name service switch to use DNS

Read on.
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24 May 2014
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Less known Solaris features: ptime [36517]
By Joerg Moellenkamp

Joerg writes, "Long time readers of my blog know that i'm preferring prstat over top at any time. The micro state accounting in prstat gives you a much deeper insight. Using a tool not capable to use microstate accounting is like looking a video in 240p instead of 4k ultra hd (to stay at this: dtrace is like 8k ;) ). prstat is doing a really useful job in telling you what's happening at the moment in a processes.

However sometimes it's interesting to know, what happened in the past since the startup of the process. And there is a tool that is doing this. With ptimes -m you can lookup the information of the micro state accounting since the creation of the process..."
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19 May 2014
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How to Set Up a Hadoop 2.2 Cluster From the Unified Archive [36518]
By Orgad Kimchi

Orgad writes, "Learn how to combine an Apache Hadoop 2.2 (YARN) cluster using Oracle Solaris Zones, the ZFS file system, and the new Unified Archive capabilities of Oracle Solaris 11.2 to set up a Hadoop cluster on a single system.

Also see how to configure manual or automatic failover, and how to use the Unified Archive to create a 'cloud in a box' and deploy bare-metal system..."
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06 May 2014
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Less known Solaris features [36388]
pwait

Joerg writes, "This is a nifty small tool that I'm using quite often in scripts that stop something and do some tasks afterwards and I don't want to hassle around with the contract file system. It's not a cool feature, but it's useful and relatively less known. An example: As I wrote long ago, you should never use kill -9 because often the normal kill is intercepted by the application and it starts to do some clean up tasks first before really stopping the process. So just because kill has returned, it doesn't imply that the process is away. How do you wait for process to disappear?..."
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07 May 2014
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Solaris-specific Providers for Puppet [36272]
By Drew Fisher

Drew writes, "As I mentioned in my previous post about Puppet, there are some new Solaris-specific Resource Types for Puppet 3.4.1 in Oracle Solaris 11.2. All of these new Resource Types and Providers have been available on java.net since integration into the FOSS projects gate. I am actively working with Puppet Labs to get this code pushed back upstream so that it's available for anybody to work with.

Here's a small description of a few (of 23) of the new Resource Types:..."
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