565 reputation
29
bio website zlynx.org
location Greenwood Village, CO
age 39
visits member for 5 years, 1 month
seen 13 hours ago

Nothing interesting about me. This is not the user you are looking for. Move along. Move along.


Jun
24
comment How do I protect my company from my IT guy?
Definitely. Also, someone needs to verify/audit the documentation to know it is currently accurate and works.
Jun
21
revised Zeroing SSD drives
Add some supporting links.
Jun
21
comment Zeroing SSD drives
@Chopper3: You cannot see that ATA TRIM and SCSI UNMAP are the same command? UNMAP is definitely used in thin provisioning. TRIM does zero out blocks on at least some SSD drives. After TRIM the data is gone: there is no supported method to retrieve it, the drive might as well return zeros and some do.
Jun
21
comment What is faster? A local mechical hard drive or a solid state drive over gigabit ethernet?
This depends greatly on your server. A system optimized for network file service (ie, a SAN) can out-perform 20 local 15K SAS drives on a database workload. It just all depends.
Jun
21
answered Zeroing SSD drives
Jun
14
comment Employee no longer with the company
Also, its been my experience that sysadmins miss a lot of stuff. One guy still had an open SSH session on a server after his account had been closed. He used Unix talk to tease us before he closed it down. The point: You pretty much have to have some trust, so you may as well treat them well.
Jun
14
comment Employee no longer with the company
Such a good point!
May
25
comment Does it make sense to install SSDs on server?
@alex: There are plenty of companies who will sell very expensive SSD solutions designed for databases and they guarantee the results. Some people have been able to replace 30 servers with one. It's like going from disks to memcached.
May
11
answered Hardware Firewall Vs. Software Firewall (IP Tables, RHEL)
Apr
25
answered What's the best way to manage package updates on an office full of Ubuntu desktop machines?
Apr
6
answered Internet speed in Linux via command
Mar
21
comment Server RAM vs PC RAM
Why would you buy one piece of 8 GB RAM? Most any server has at least 4 RAM slots. If you needed maximum RAM you would buy 4 8GB pieces. If you needed 8GB you would buy 4 2GB pieces. But never 1 8GB piece...
Mar
9
comment Is it normal to get hundreds of break-in attempts per day?
Instead of iptables rules or hosts.deny try using ipsets. You make a iptables rule to block every IP/network in the set, then add IPs to the set. The ipset implementation is very fast: much faster than the iptables rule chains.
Mar
4
answered Mirrored Mode RAM: Is it worth it?
Feb
22
awarded  Scholar
Feb
22
accepted VirtualBox cannot start a virtual machine on Windows 7
Feb
8
answered VirtualBox cannot start a virtual machine on Windows 7
Feb
8
asked VirtualBox cannot start a virtual machine on Windows 7
Feb
2
comment Is it safe to use consumer MLC SSDs in a server?
One trick to get more reserve space out of a drive is to do the secure erase, then partition it with a large fraction unused. This free space will add to the SSD's performance and lifetime.
Nov
15
answered How to detect a hidden process in linux?