Again and again

When you have worked with Solaris 11 or 10 you have surely used SMF and loved it to a varying degree. Since 11.3 there is something new in it: SMF...

Only one time

Whenever you read something about security, there is a repeated suggestion that you use multi-factor authentication at best with a one time password (OTP) . I activated this wherever possible....

Network in the Shell - revisited

My long-time reader Lars Timmann pointed me to a another really cool usecase of the /dev/tcp pseudo device in the bash shell. You can use it to proxy ssh connections...

Network in the Shell

It’s a nifty small feature in the bash shell that i start to love quite a time ago when i just wanted to check some networking stuff from the shell....

Hate and responsibility

The best science fiction in my opinion is the fiction that extrapolates the science in a future that is maybe 5 years or 10 years away. Science fiction that takes...

A new start

Perhaps you know that I was the guy behind c0t0d0s0.org. I started it around 2004 and for the topic it was quite successful. As time went by, things changed. Around...

tar -x and NFS - or: The devil in the details

Sometimes some simple question leads you down deep to basic discussions: This was something I had to solve 2 years ago. The hard part was not finding it out, that...

Slapped by metaslabs

I just want to share something that I’ve learned a few days ago by doing this. Let’s assume you have a ZFS pool. 1 TB in size. You want to...

vHBA and LUN 0

This issue got on my table quite a number of times in the last 4 weeks. Customer is trying to use the vHBA feature of Oracle VM for SAPRC 3.3...

user_reserve_hint_pct

One of the usual lines in customers /etc/system is the line to limit the the size of the ARC. For a long time you used the zfs_arc_limit parameter for doing...

tar -x and NFS - or: The devil in the details

Sometimes some simple question leads you down deep to basic discussions: This was something I had to solve 2 years ago. The hard part was not finding it out, that...

NVMe hotplugging

As i get some questions about it in recent times: With a normal SATA/SAS disk you can simply unplug a disk without warning and preparation. NVMe are different. For all...

Empty homes

Recently I had a performance tuning gig at a customer reporting that despite having the same number of vCPUs configured into the Logical Domain, the performance of both systems was...

vHBA and LUN 0

This issue got on my table quite a number of times in the last 4 weeks. Customer is trying to use the vHBA feature of Oracle VM for SAPRC 3.3...

The "Enemy inside" ... now at your home

Given the news about the DDoS attacks carried out by “Internet of Things devices” that were in the news last week like in “Brace yourselves—source code powering potent IoT DDoSes...

user_reserve_hint_pct

One of the usual lines in customers /etc/system is the line to limit the the size of the ARC. For a long time you used the zfs_arc_limit parameter for doing...

Video "Oracle Solaris Essentials for Experienced Administrators"

A 6 hour kickstart for experienced UNIX administrators: Oracle Solaris Essentials for Experienced Administrators. Provided by Oracle University, presented by a colleague of the Oracle Elite Engineering Exchange and it’s...

Business Breakfast in Hamburg am 16. September : "SPARC S7, Cloud und MiniCluster."

Am 16. September findet ein Oracle Business Breakfast zu den Themen SPARC S7, Cloud und MiniCluster statt. Wenn ihr kommen möchtet, bitte eine kurze Bestätigung an meinen Kollegen. Ich werde...

24 hours of air traffic over northern germany.

I’m playing at the moment a little bit with SDR. One of the nice things is that you can use it to receive ASD-B information. This is a system that...

Ideas for Solaris 11 Cheatsheets?

Just a short question: Do you have any topics you would like to see in further versions of the Solaris 11 cheat sheet?