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90%
Monitoring network computers with the Icinga Nagios fork
30.11.2025
Home
»
Archive
»
2010
»
Issue 1: System...
»
141.20.108.124 07 active_checks_enabled 1
08
passive_checks_enabled
0
09 max_check_attempts 3 10 check_command check-host-alive 11
90%
Creating an SFTP jail
30.11.2025
Home
»
Archive
»
2011
»
Issue 3: Are yo...
»
_config 03 bash#> vi sshd_config 04 AllowTcpForwarding no 05 ClientAliveCountMax 3 06 ClientAliveInterval
0
07 Compression delayed
08
LoginGraceTime 60s 09 LogLevel DEBUG3 10 MaxAuthTries 2
89%
OpenVPN with e-tokens in large-scale environments
30.11.2025
Home
»
Archive
»
2011
»
Issue 5: Pen Te...
»
/openvpn/keys/CA.crt
08
cert /etc/openvpn/keys/server.crt 09 key /etc/openvpn/keys/server.key 10 tls-auth /etc/openvpn/keys/tls-auth.key 11 12 server 192.168.1.
0
255.255.255.
0
13 14 keepalive 10 60 15 comp-lzo 16 17
89%
Julia: A new language for technical computing
30.11.2025
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Archive
»
2012
»
Issue 10: Traff...
»
.84 132.71 3,127.50 713.77 4.11 mandel 5.55 31.15 65.44 824.68 156.68 5.67 pi_sum
0
.74 18.03 1.
08
328
88%
Managing virtual machines
30.11.2025
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»
2012
»
Issue 09: Windo...
»
end (Figure 2). Listing 3 update-dns 01 #!/usr/bin/perl 02 03 use DBI; 04 05 $db_user = "powerdns"; 06 $db_passwd = "powerpass"; 07
08
$hostname = $ARGV[
0
] . ".my.org"; 09 $ip = $ARGV[1
88%
Targeted defense against brute force attacks
30.11.2025
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»
Archive
»
2011
»
Issue 3: Are yo...
»
.101 03 192.168.
0
.102 04 # The LAN in the Development dept.: 05 192.168.
0
/24 06 # Our branch offices: 07
08
branch1.example.com 09 branch2.example.com Assuming the file is called whitelist.txt, you
88%
Script utilities in depth: grep, awk, and sed
30.11.2025
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»
Archive
»
2011
»
Issue 4: Secure...
»
:
x
=1 while [ $
x
-gt
0
]; do sleep $waittime
x
=`ps aux | grep -c gauss` done /apps/bin/gauss $1 & The script begins by setting the variable
x
to 1. Next, a while loop continues until
x
becomes
0
87%
The next generation of Internet connectivity
30.11.2025
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»
Archive
»
2011
»
Issue 3: Are yo...
»
radvd Configuration 01 interface eth1 02 { 03 AdvSendAdvert on; 04 MinRtrAdvInterval 30; 05 MaxRtrAdvInterval
100
; 06 prefix 2001:42b5:d64a:
0
::/64 07 {
08
AdvOnLink on; 09
86%
Virtualization via Zones
30.11.2025
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»
Archive
»
2010
»
Issue 0: Active...
»
using? 07 1) ANSI Standard CRT
08
2) DEC VT
100
09 3) PC Console 10 4) Sun Command Tool 11 5) Sun Workstation 12 6)
X
Terminal Emulator (xterms) 13 7) Other 14 Type the number of your choice ...
0
84%
A Btrfs field test and workshop
31.10.2025
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»
Archive
»
2012
»
Issue 11: Cloud...
»
and subsequently renaming a subvolume can be done on the fly (Figure 16): mount -o subvolid=
0
/dev/dm-
0
/mnt && cd /mnt btrfs sub delete @ mv @apt-snapshot-2012-07-23_
08
\:52\:34/ @ cd && umount /mnt
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