Author Archive
Linux solution for ARP flux
If for some reason you have to configure multiple network interfaces in the same subnet, e.g. eth0 – 192.168.1.1/24, eth1 – 192.168.1.2/24, eth2 – 192.168.1.3/24, etc., on Linux box you’d certainly face a so called ARP flux issue. To fix it (I assume you have kernel > 2.6.2) just set the following sysctl options as […]
What to do if HDvM reports unknown version
If you notice that HDvM web interface is saying that it’s running an unknown version (and also recommends to contact HDS support) or when applying a patch it fails like this: # ./UPDATE *********************************************************************** * Update Utility * *********************************************************************** [HDvM 072003] Hitachi Device Manager Now searching for target products… The target product is not found. […]
Enable CIM server on MDS Cisco switch
Want to add your shiny MDS Cisco switch into HTnM (Hitachi Tuning Manager) – that’s very easy. All you have to do is to enable cim, preferably secure cim server, and configure agtw (SAN agent) using HTnM cli. How I did it… ssh into a switch to configure CIM server. First I copied SSL certificate […]
RSA AM doesn’t start after kernel upgrade?
If you’ve just upgraded the kernel and your RSA AM server doesn’t start anymore and you see the following error: com.rsa.ims.security.keymanager.sys.SystemModificationThresholdException: System was modified beyond the allowed threshold, cannot decrypt. don’t lose consciousness since there is a simple remedy for that # su – rsa $ cd /opt/RSAAuthenticationManager/utils/ $ ./rsautil manage-secrets -a recover $ Just […]
Migrating Hi-Track
Yesterday I was moving Hi-Tack monitor from Window to Linux and just want to give a quick overview of the process. To save all your previous Hi-Track configuration just do the following: Install Hi-Track, no surprisingly. Copy devices.export from your old installation and apply it to a new one: /usr/hds/hitdfmon/rundfmon import ./devices.export Copy object.dat28 and […]
Fork Yeah! The Rise and Development of illumos
Oh gosh, I truly love the way Bryan Cantrill runs his public speeches/presentation. Purely amazing, full of energy, fun and endlessness positiveness shines through out his talks. And of course, they’re always full of the info one can’t find anywhere else. Highly recommended.
Back to school
Registered for the free online classes presented by Stanford University: CS101 Cryptography Computer security I do really hope I would have enough time to keep pace with the lectures, wouldn’t brake the timings and eventually finish all the classes I’ve subscribed to.
Bye-bye google reader
After Google had introduced an updated version of the Reader and deliberately turned it into a clunky, shitty and hard on the eyes application, I decided to pack my bag and move all my feeds to www.newsblur.com. As far as I could tell this is the best Google Reader replacement and I could find. It’s […]
SystemTap
Guys, that’s not funny ay all. To tell the truth, I’ve never used SystemTap myself but always treated it as a valid option when your on Linux as there is no dtrace. But hey, read another outstanding review from Brendan Gregg and decide yourself if you could trust it. Just a short excerpt: To write […]
HTnM data migration between Windows and Linux
Sometime ago I was trying to migrate HTnM data, more precisely HTnM agents datastore history information, from Windows to Linux and want to share my story. Migrating HTnM configuration and its data from Windows to Linux is very easy, just follow the documentation steps verbatim. But moving historical data from the HTnM agents, whether it’s […]