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Get the best out of your bandwidth with tc

30.11.2025

Home » Archive » 2012 » Issue 10: Traff... »

understand how shaping or throttling works with tc: When shaping a 10mbit/s connection to 1mbit/s, the link will be idle 90% of the time. If it isn't, it needs to be throttled so that it IS idle 90

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Boost performance of your Python programs

30.11.2025

Home » Archive » 2010 » Issue 2: Backup... »

oc.close() 20 21 if '__main__' == __name__: 22 23 uicores = cpu_count() 24 olck = Lock() 25 26 oque = Queue() 27 op, oc = Pipe() 28 29 for ui in xrange(1, 2*uicores): 30

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Targeted defense against brute force attacks

30.11.2025

Home » Archive » 2011 » Issue 3: Are yo... »

specific ports with sshguard, you can use the --destination-ports parameter to find them. For example, sudo iptables -A INPUT -m multiport -p tcp --destination-ports 21,22 -j sshguard would block only

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Monitoring network computers with the Icinga Nagios fork

30.11.2025

Home » Archive » 2010 » Issue 1: System... »

notification_interval 60 16 notification_options d 17 } 18 19 # Fileserver 20 define host{ 21 host_name fileserver 22 alias Fileserver 23

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Fast system management from Puppet Labs

30.11.2025

Home » Archive » 2011 » Issue 5: Pen Te... »

20 21 22 23 24

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Virtualization via Zones

30.11.2025

Home » Archive » 2010 » Issue 0: Active... »

: Man pages can be obtained by installing SUNWman 22 Postinstall: Copying SMF seed repository ... done. 23 Postinstall: Applying workarounds. 24 Done: Installation completed in 411.387 seconds

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An IT nomad's diary

30.11.2025

Home » Archive » 2011 » Issue 5: Pen Te... »

-tuxgeek.rhcloud.com,174.129.129.190' (RSA) to the list of known hosts. 20 Enter passphrase for key '/home/tscherf/.ssh/libra_id_rsa': 21 Confirming application spaceuploader is available 22 Attempt # 1 23 24 Success

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Shell scripts: Equal rights for Unix derivatives and Linux

30.11.2025

Home » Archive » 2010 » Issue 2: Backup... »

OS*) 15 PING="ping" 16 PING2="" 17 ;; 18 esac 19 ... 20 21 for i in server1 server2 server3 workstation1 workstation2 22 do 23 $PING $i $PING2 > /dev/null 24 if [ "$?" != "0

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Workshop: Container virtualization with LXC on Ubuntu 10.04

30.11.2025

Home » Archive » 2011 » Issue 6: Perfor... »

:5 rwm 18 # consoles 19 lxc.cgroup.devices.allow = c 5:1 rwm 20 lxc.cgroup.devices.allow = c 5:0 rwm 21 lxc.cgroup.devices.allow = c 4:0 rwm 22 lxc.cgroup.devices.allow = c 4:1 rwm 23 # /dev/{,u}random 24

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Dispatches from the world of IT

30.11.2025

Home » Archive » 2011 » Issue 5: Pen Te... »

the recently launched TouchPad tablet line. On September 22, 2011, the HP board of directors announced it was retiring Leo Apotheker. Plenty of controversy and commentary followed both announcements

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