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89%
Creating and evaluating kernel crash dumps
31.10.2025
Home
»
Archive
»
2012
»
Issue 11: Cloud...
»
kernel sles:~ # grep crash /proc/cmdline root=/dev/disk/by-uuid/10
a
83ffe-5
a
9
f-48
a
2-b8cb-551c2cc6b42d resume=/dev/sda3 splash=silent text showopts crashkernel=128 sles:~ # /etc/init.d/boot.kdump status
89%
A Btrfs field test and workshop
31.10.2025
Home
»
Archive
»
2012
»
Issue 11: Cloud...
»
. Figure
12
: Another rebalance, this time only of the metadata, recovers 7GB of
9
GB for general use – per block device. To compensate for this, the sum of all block devices on the volume is displayed
89%
Getting started with I/O profiling
30.11.2025
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»
Archive
»
2012
»
Issue 08: FreeNAS
»
of read requests issued to the device per second. w/s : Number of write requests issued to the device per second. r
MB
/s : Number of megabytes read from the device per second. w
MB
/s : Number
89%
Monitoring with Zabbix
30.11.2025
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Archive
»
2012
»
Issue 07: Xen v...
»
types (geographical, infrastructure, and so on), which is part of the default installation scope. Shapes and Sizes Zabbix is released under the GNU GPL, and the latest version 1.8.
9
can be downloaded
88%
Comparing 5 to 50TB NAS storage boxes
31.10.2025
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Archive
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2012
»
Issue 12: NAS S...
»
lacks support for SSH access and access to the hard disks' S.M.
A
.R.T data. Thecus
N
6850 We imported the Thecus
N
6850 from its vendor in the Far East, but you can buy it directly from dealers. What you ...
12
87%
pfSense firewall and router distribution
30.11.2025
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Archive
»
2012
»
Issue 07: Xen v...
»
Chris Buechler and Scott Ullrich were unhappy. Although the FreeBSD m0
n
0wall distribution gave them a quick option for setting up a firewall and a router, it was designed for use on embedded systems
87%
Debugging the Linux kernel with the Qemu emulator
30.11.2025
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Archive
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2012
»
Issue 07: Xen v...
»
_world[]="Hello World\
n
"; 08 static dev_t hello_dev_number; 09 static struct cdev *driver_object; 10 static struct class *hello_class; 11 static struct device *hello_dev;
12
13 static ssize_t driver_read( struct file
86%
Checking password complexity with John the Ripper
30.11.2025
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»
Archive
»
2011
»
Issue 6: Perfor...
»
for checking a password hash file against a password dictionary is very high. A hacker can recover dictionary-based passwords in minutes, whereas a brute force attack can take days. Brute force is a single-character-at-
a
85%
A standard cloud computing API
30.11.2025
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Archive
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2011
»
Issue 6: Perfor...
»
total = summary.values.inject(0) { |sum, i| sum += i }
12
puts "Found #{total} instances in the following states:" 13 summary.keys.sort.each do |s| 14 printf "%20s %d\
n
", s, summary[s] 15 end 16 puts
84%
Creating RAID systems with Raider
31.10.2025
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»
Archive
»
2012
»
Issue 12: NAS S...
»
Read Speed Write Speed Capacity 1 1+1 1x 1x 1x 5
1+2
2x
1/2
x 2x 6 1+3 2x 1/3x 2x ...
12
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