9,127 reputation
648106
bio website stefanco.com
location Berkeley, CA
age
visits member for 4 years, 4 months
seen 10 hours ago

profile for Stefan Lasiewski on Stack Exchange, a network of free, community-driven Q&A sites
Stefan Lasiewski

Daddy, Linux Guy, Bicyclist, Tinkerer, Fixer & Breaker of things.

I work as a Senior Server Team Engineer at the National Energy Research Scientific Computing Center (NERSC) Division at Lawrence Berkeley National Laboratory (LBNL) in Berkeley, CA.

Father of 3 cute children. Yes I'm a sysadmin and a parent.

Heavy user of CentOS, RHEL & FreeBSD for production services at work. I also run Ubuntu at home, for the simplicity. I'm a fan of Apache HTTP Server, Nagios & Cacti.

Original proposer of unix.stackexchange.com (Yes, this proposal predated askubuntu.com, and I wish they would have merged with the Unix proposal.).


1d
comment what distributed file system for a two-node failover setup?
Seriously, if a question like this is considered off topic then I'm not sure what the purpose of Serverfault is anymore.
Jul
3
awarded  Good Answer
Jul
3
awarded  Popular Question
Jul
2
awarded  Curious
Jul
2
awarded  Inquisitive
Jul
1
reviewed Approve suggested edit on Is there a better way of handling ossec-logcollector?
Jul
1
reviewed Approve suggested edit on ssh is no longer using ~/.ssh/config
Jul
1
reviewed Reject suggested edit on How do I specify a driver disk image that is on the local cdrom?
Jun
30
comment Accessing Supermicro IPMI via SSH
Note that you can reboot the BMC remotely using $ ipmitool -H 1.2.3.4 -U ADMIN -E -I lanplus bmc reset warm (or cold). I haven't found the SMASH-CLP useful at all. Supermicro provides different BMCs from different vendors, each with a different implementation of a CLP, learning what is possible is a serious pain and doesn't apply to all nodes.
Jun
26
comment How to maintain site.pp with many nodes?
Keep in mind that import 'nodes/*.pp' is deprecated in Puppet 3.5 and will be removed in Puppet 4.
Jun
25
comment Hide the output of a shell command only on success?
What I do is print stdout & stderr to a logfile so it doesn't clutter the screen. I also print stderr to the screen, so if there is and error I can see it. If I need details I can check the logfile, which contains the program output and the program errors in context. This way, I can 'see both but only if something goes wrong'. Does this help? See stackoverflow.com/questions/2871233/…
Jun
24
revised How should I calculate IOPS for RAID50 & RAID60?
edited title
Jun
24
awarded  Popular Question
Jun
24
revised Should I let email bounce or send it to a blackhole?
*Backscatter* not Backspatter
Jun
23
comment How much harm can a non-root user cause?
A user can install a compiler and compile a wide range of software, including tools used to exploit the system.
Jun
22
comment Is it legal to create an RPM which only runs %post scripts to modify a file owned by another RPM?
I think some shops do use RPMs regularly for this sort of configuration management. In particular, if you want to install Puppet/Chef/CFEngine from an RPM or during kickstart, you often need the repo files file installed first-- but normally you would want to do this using your Configuration Management system. It can be a catch-22 situation.
Jun
20
comment Why is Linux kdump not writing to /var/crash?
I'll check out the initrd and see what I find. The path option in #2 is the default path (/var/crash).
Jun
17
awarded  Popular Question
Jun
14
comment IPMI MAC address all zeros after update
I see. In that case, follow the suggestions of Supermicro support. However since you might be using a beta-release (Or at least, a non-production release) and we may not be able to help you. You might need to contact Supermicro support again; and make sure they provide you with the changelog for the firmware.
Jun
13
answered IPMI MAC address all zeros after update