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13%
Script utilities in depth: grep, awk, and sed
30.11.2025
Home
»
Archive
»
2011
»
Issue 4: Secure...
»
in a specified city. Listing 1 Display Date and Time 01 if [ "$1" = "" ]; then 02 echo "City name required." 03 exit 04 fi 05 city=`echo $1 | sed -e '
s
/ /_/g'` 06 z=`find /usr
13%
Tuning loops – from loop unrolling to Duff's device
28.07.2025
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2025
»
Issue 88: 5 Net...
»
. The highly tuned Assembler subroutines so crucial to the demoscene art [
12
] and interactive shoot-em-up videogames of the 1990
s
were handcrafted by iconic programmers such as Doom's John Carmack [13] or Quake
13%
Data acquisition with shell tools
30.11.2025
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2010
»
Issue 2: Backup...
»
while true 11 do
12
echo -n "Text entry: ";read text 13 echo -n "Numeric entry: ";read number 14 echo -n "Save (
s
) End (e) ";read we 15 if [ "$we" = "
s
" ]; 16 then 17 echo "Insert into demo values
13%
SSH Administration – Windows in a Unix World
30.11.2025
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2010
»
Issue 0: Active...
»
to a remote host, allow this with the command $ xhost +
and then export your display to the remote host on which you want to view the applications. $ export DISPLAY=hostname:
0.0
On the system
13%
Get the best out of your bandwidth with tc
30.11.2025
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2012
»
Issue 10: Traff...
»
later on, but in the meantime, the following is a class configuration line: tc class add dev $DEV parent 1:1 classid 1:
12
cbq bandwidth $BAND rate 25Mbit allot 1514 cell 8 weight 2500Kbit prio
3
maxburst
13%
I/O benchmarks with Fio
30.11.2025
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2011
»
Issue 5: Pen Te...
»
/0K /
s
] [4137 /0 iops] [eta
00
m:06
s
] In the example, the first job is performing a sequential read, marked as r in square brackets, while Fio hasn't initialized the second job, marked as P
13%
Monitoring virtualization environments with Nagios and Icinga
30.11.2025
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2010
»
Issue 2: Backup...
»
CPU PROCESS/NLWP # 173 daemon 17M 11M sleep 59 0
3
:18:42 0.2% rcapd/1 # 17676 apl 6916K 3468K cpu4 59 0 0:
00:00
0.1% prstat/1 # ... # ZONEID NPROC SWAP RSS MEMORY TIME
13%
Workshop: Container virtualization with LXC on Ubuntu 10.04
30.11.2025
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2011
»
Issue 6: Perfor...
»
.network.type = veth 04 lxc.network.flags = up 05 lxc.network.link = br0 06 lxc.network.hwaddr = 08:
00:12
:34:56:78 07 #lxc.network.ipv4 = 0.0.0.0 08 lxc.network.ipv4 = 192.168.1.69 09 lxc.network.name = eth0 10 lxc
13%
Connecting dissimilar IPsec implementations
30.11.2025
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2011
»
Issue 4: Secure...
»
endpoint1=192.168.80.0/24 07 endpoint2=192.168.2.0/24 08 action=requireinrequireout 09 auth1=computerpsk 10 auth1psk="test123" 11 qmsecmethods=esp:sha1-
3
des
12
qmpfs=dhgroup2 If you need
13%
Igel thin clients
30.11.2025
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2010
»
Issue 2: Backup...
»
is supplied free of charge to customers, is currently available as version
3
.06 for Windows and Linux. Figure 1: The Igel thin client UD
3
series (source: Igel
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