Inglorious Quad : excellent !
Oesterstout: excellent !
Embrasse: very good.
Zumbi: excellent !
Barbe Noire: very good.
2015-03-26
black beer
There is always room for beer (linky).
Inglorious Quad : excellent !
Oesterstout: excellent !
Embrasse: very good.
Zumbi: excellent !
Barbe Noire: very good.
Inglorious Quad : excellent !
Oesterstout: excellent !
Embrasse: very good.
Zumbi: excellent !
Barbe Noire: very good.
2014-09-06
Vagrantfile (this is just a bookmark)
This is my (thank you Abel) current Vagrantfile to quickly create a number of servers with two extra disks and three extra network cards:
VAGRANTFILE_API_VERSION = "2"
Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
config.vm.provider :virtualbox do |vb|
vb.customize ["storagectl", :id, "--add", "sata", "--name", "SATA" , "--portcount", 2, "--hostiocache", "on"]
end
(1..3).each do |i|
config.vm.define "server#{i}" do |node|
node.vm.hostname = "server#{i}"
node.vm.box = "hfm4/centos7"
config.vm.box_check_update = true
node.vm.network :public_network, ip: "10.1.1.#{i}", netmask: '255.255.255.0'
node.vm.network :public_network, ip: "10.1.2.#{i}", netmask: '255.255.255.0'
node.vm.network :public_network, ip: "10.1.3.#{i}", netmask: '255.255.255.0'
config.vm.provider "virtualbox" do |v|
v.name = "server#{i}"
v.memory = 512
v.cpus = 1
v.customize ['createhd', '--filename', "server_#{i}a.vdi", '--size', 8192 ]
v.customize ['createhd', '--filename', "server_#{i}b.vdi", '--size', 8192 ]
v.customize ['storageattach', :id, '--storagectl', 'SATA', '--port', 1, '--device', 0, \
'--type', 'hdd', '--medium', "./server_#{i}a.vdi"]
v.customize ['storageattach', :id, '--storagectl', 'SATA', '--port', 2, '--device', 0, \
'--type', 'hdd', '--medium', "./server_#{i}b.vdi"]
end
end
end
end
2014-05-19
Reserved DNS TLD's .invalid ?
I (wrongly) assumed that using a .local domain would never bother the root dns servers. It does (about 1500 q/sec).
So I read the relevant rfc's (2606 and 6761) where it clearly states:
root@debian7:~# tcpdump port 53 -l | grep NX &
[1] 5699
root@debian7:~# tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
root@debian7:~# nslookup
> server 127.0.0.1
Default server: 127.0.0.1
Address: 127.0.0.1#53
> linux-training.local
09:22:15.932194 IP f.root-servers.net.domain > 10.0.2.15.46669: 49328 NXDomain*- 0/6/1 (656)
09:22:15.997731 IP j.root-servers.net.domain > 10.0.2.15.47262: 43556 NXDomain*- 0/6/1 (669)
Server: 127.0.0.1
Address: 127.0.0.1#53
** server can't find linux-training.local: NXDOMAIN
> linux-training.localhost
09:22:23.099452 IP e.root-servers.net.domain > 10.0.2.15.60696: 22464 NXDomain*- 0/6/1 (673)
Server: 127.0.0.1
Address: 127.0.0.1#53
** server can't find linux-training.localhost: NXDOMAIN
> linux-training.test
Server: 127.0.0.1
Address: 127.0.0.1#53
** server can't find linux-training.test: NXDOMAIN
> linux-training.example
09:22:42.124036 IP e.root-servers.net.domain > 10.0.2.15.7293: 8476 NXDomain*- 0/6/1 (661)
09:22:42.141847 IP e.root-servers.net.domain > 10.0.2.15.15481: 31139 NXDomain*- 0/6/1 (671)
Server: 127.0.0.1
Address: 127.0.0.1#53
** server can't find linux-training.example: NXDOMAIN
> linux-training.invalid
09:22:49.660427 IP e.root-servers.net.domain > 10.0.2.15.60321: 15655 NXDomain*- 0/6/1 (671)
09:22:49.753120 IP l.root-servers.net.domain > 10.0.2.15.63563: 48281 NXDomain*- 0/6/1 (671)
Server: 127.0.0.1
Address: 127.0.0.1#53
** server can't find linux-training.invalid: NXDOMAIN
So I visit the root dns server stats and notice the top queries (in queries/second):
1 .com 3500
2 .net 2500
3 .local 1400
4 . 1100
5 .home 1100
6. (.com base 64)
7 .org 400
8. .belkin 300
The top five queries for BRU01 (a Belgian root name server) are a surprise:
1 .home 240
2 .localhost 53
3 .local 50
4 .com 19
5 .ru 12
(.be is negligible with 0.4 queries/second)
cheers,
paul
So I read the relevant rfc's (2606 and 6761) where it clearly states:
...caching DNS servers SHOULD, by default, generate immediate negative responses for all such queries. This is to avoid unnecessary load on the root name servers and other name servers...
So I did a small test with the most recent bind9 in Debian as a caching only server, and it turns out it sends .local .localhost .example and .invalid to the root name servers ?! Only .test has an immediate response.
root@debian7:~# tcpdump port 53 -l | grep NX &
[1] 5699
root@debian7:~# tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
root@debian7:~# nslookup
> server 127.0.0.1
Default server: 127.0.0.1
Address: 127.0.0.1#53
> linux-training.local
09:22:15.932194 IP f.root-servers.net.domain > 10.0.2.15.46669: 49328 NXDomain*- 0/6/1 (656)
09:22:15.997731 IP j.root-servers.net.domain > 10.0.2.15.47262: 43556 NXDomain*- 0/6/1 (669)
Server: 127.0.0.1
Address: 127.0.0.1#53
** server can't find linux-training.local: NXDOMAIN
> linux-training.localhost
09:22:23.099452 IP e.root-servers.net.domain > 10.0.2.15.60696: 22464 NXDomain*- 0/6/1 (673)
Server: 127.0.0.1
Address: 127.0.0.1#53
** server can't find linux-training.localhost: NXDOMAIN
> linux-training.test
Server: 127.0.0.1
Address: 127.0.0.1#53
** server can't find linux-training.test: NXDOMAIN
> linux-training.example
09:22:42.124036 IP e.root-servers.net.domain > 10.0.2.15.7293: 8476 NXDomain*- 0/6/1 (661)
09:22:42.141847 IP e.root-servers.net.domain > 10.0.2.15.15481: 31139 NXDomain*- 0/6/1 (671)
Server: 127.0.0.1
Address: 127.0.0.1#53
** server can't find linux-training.example: NXDOMAIN
> linux-training.invalid
09:22:49.660427 IP e.root-servers.net.domain > 10.0.2.15.60321: 15655 NXDomain*- 0/6/1 (671)
09:22:49.753120 IP l.root-servers.net.domain > 10.0.2.15.63563: 48281 NXDomain*- 0/6/1 (671)
Server: 127.0.0.1
Address: 127.0.0.1#53
** server can't find linux-training.invalid: NXDOMAIN
So I visit the root dns server stats and notice the top queries (in queries/second):
1 .com 3500
2 .net 2500
3 .local 1400
4 . 1100
5 .home 1100
6. (.com base 64)
7 .org 400
8. .belkin 300
The top five queries for BRU01 (a Belgian root name server) are a surprise:
1 .home 240
2 .localhost 53
3 .local 50
4 .com 19
5 .ru 12
(.be is negligible with 0.4 queries/second)
cheers,
paul
2014-05-16
Coffee or Tea ? Yes!
When people ask me:
"Do you want coffee or tea?" (*)
Then I answer:
"Yes."
... and most assume that I want to be funny, but I don't. I just don't care which of the two (coffee or tea) you give me, I am happy with both.
Turns out I am a hacker.
(*) Do you want spaghetti or rice ? Yes!
(*) Leffe or Chimay ? Yes!
(*) Can I see you tonight or tomorrow ? Yes!
It gets worse when questions contain all possible actions:
(*) Should I stay or should I go?
(*) Can I keep the book or do you want it back ?
(*) With or without sugar ?
You just gave me all possible options ?! What kind of trickery questions are these ?!
;-)
"Do you want coffee or tea?" (*)
Then I answer:
"Yes."
... and most assume that I want to be funny, but I don't. I just don't care which of the two (coffee or tea) you give me, I am happy with both.
Turns out I am a hacker.
(*) Do you want spaghetti or rice ? Yes!
(*) Leffe or Chimay ? Yes!
(*) Can I see you tonight or tomorrow ? Yes!
It gets worse when questions contain all possible actions:
(*) Should I stay or should I go?
(*) Can I keep the book or do you want it back ?
(*) With or without sugar ?
You just gave me all possible options ?! What kind of trickery questions are these ?!
;-)
2014-04-19
Vagrant: Creating 10 vm's with 6 disks each
Hello lazyweb,
the Vagrantfile below works fine, but can probably be written simpler. I've been struggling to create variables like "servers=10" and "disks=6" to automate creation of 10 servers with 6 disks each.
Drop me a hint if you feel like creating those two loops.
paul@retinad:~/vagrant$ cat Vagrantfile
hosts = [ { name: 'server1', disk1: './server1disk1.vdi', disk2: 'server1disk2.vdi' },
{ name: 'server2', disk1: './server2disk1.vdi', disk2: 'server2disk2.vdi' },
{ name: 'server3', disk1: './server3disk1.vdi', disk2: 'server3disk2.vdi' }]
Vagrant.configure("2") do |config|
config.vm.provider :virtualbox do |vb|
vb.customize ["storagectl", :id, "--add", "sata", "--name", "SATA" , "--portcount", 2, "--hostiocache", "on"]
end
hosts.each do |host|
config.vm.define host[:name] do |node|
node.vm.hostname = host[:name]
node.vm.box = "chef/centos-6.5"
node.vm.network :public_network
node.vm.synced_folder "/srv/data", "/data"
node.vm.provider :virtualbox do |vb|
vb.name = host[:name]
vb.customize ['createhd', '--filename', host[:disk1], '--size', 2 * 1024]
vb.customize ['createhd', '--filename', host[:disk2], '--size', 2 * 1024]
vb.customize ['storageattach', :id, '--storagectl', "SATA", '--port', 1, '--device', 0, '--type', 'hdd', '--medium', host[:disk1] ]
vb.customize ['storageattach', :id, '--storagectl', "SATA", '--port', 2, '--device', 0, '--type', 'hdd', '--medium', host[:disk2] ]
end
end
end
end
the Vagrantfile below works fine, but can probably be written simpler. I've been struggling to create variables like "servers=10" and "disks=6" to automate creation of 10 servers with 6 disks each.
Drop me a hint if you feel like creating those two loops.
paul@retinad:~/vagrant$ cat Vagrantfile
hosts = [ { name: 'server1', disk1: './server1disk1.vdi', disk2: 'server1disk2.vdi' },
{ name: 'server2', disk1: './server2disk1.vdi', disk2: 'server2disk2.vdi' },
{ name: 'server3', disk1: './server3disk1.vdi', disk2: 'server3disk2.vdi' }]
Vagrant.configure("2") do |config|
config.vm.provider :virtualbox do |vb|
vb.customize ["storagectl", :id, "--add", "sata", "--name", "SATA" , "--portcount", 2, "--hostiocache", "on"]
end
hosts.each do |host|
config.vm.define host[:name] do |node|
node.vm.hostname = host[:name]
node.vm.box = "chef/centos-6.5"
node.vm.network :public_network
node.vm.synced_folder "/srv/data", "/data"
node.vm.provider :virtualbox do |vb|
vb.name = host[:name]
vb.customize ['createhd', '--filename', host[:disk1], '--size', 2 * 1024]
vb.customize ['createhd', '--filename', host[:disk2], '--size', 2 * 1024]
vb.customize ['storageattach', :id, '--storagectl', "SATA", '--port', 1, '--device', 0, '--type', 'hdd', '--medium', host[:disk1] ]
vb.customize ['storageattach', :id, '--storagectl', "SATA", '--port', 2, '--device', 0, '--type', 'hdd', '--medium', host[:disk2] ]
end
end
end
end
2014-01-15
The grand Windows vs Linux fight
A lot of muggles are convinced there is some big battle going on between Microsoft and Linux. They are wrong.
Truth is that only a minority of very noisy wannabe-Linux users see this as a fight. I imagine this loud minority as people who once installed Ubuntu but actually spend most of their time playing games on Windows.
The reality is that most organizations use Microsoft on the Desktop and a lot of them also have one or more products like MS Active Directory, MS Exchange or MS Sharepoint.
But every other computer runs a form of Unix, very often this is Linux:
- the millions of servers from Facebook, Google, Twitter, ...
- millions of DSL modems
- more than a billion Android phones
- 98 percent of the 500 largest supercomputers in the world
- Lego robots
- space station laptops
- (in Belgium specifically stuff like the bbox and digibox etc)
- tablets, routers, firewalls, NAS devices (aka "external harddisks"), stock exchanges, radar control, gps navigation and much more
There was no battle, there is no fight, there will never be a Linux vs Windows. They are just different things, Microsoft is used for end user intranet, Linux for servers and all other devices.
(*) Sure there is also iPad, iPhone and Mac, I know that.
Truth is that only a minority of very noisy wannabe-Linux users see this as a fight. I imagine this loud minority as people who once installed Ubuntu but actually spend most of their time playing games on Windows.
The reality is that most organizations use Microsoft on the Desktop and a lot of them also have one or more products like MS Active Directory, MS Exchange or MS Sharepoint.
But every other computer runs a form of Unix, very often this is Linux:
- the millions of servers from Facebook, Google, Twitter, ...
- millions of DSL modems
- more than a billion Android phones
- 98 percent of the 500 largest supercomputers in the world
- Lego robots
- space station laptops
- (in Belgium specifically stuff like the bbox and digibox etc)
- tablets, routers, firewalls, NAS devices (aka "external harddisks"), stock exchanges, radar control, gps navigation and much more
There was no battle, there is no fight, there will never be a Linux vs Windows. They are just different things, Microsoft is used for end user intranet, Linux for servers and all other devices.
(*) Sure there is also iPad, iPhone and Mac, I know that.
2013-11-04
nieuwe laptop kopen ?
Ik zou een nieuwe laptop willen kopen, graag advies:
- moet uiteraard Debian kunnen draaien zonder proprietary binary drivers (dus radeon hd?)
- liefst zonder Microsoft of Apple tax
- kleine harde schijf (ik gebruik amper 50GB)
- rond de 8GB ram
- snelle cpu i5 of i7
- maar wil vooral dus dat Debian er op werkt...
- us qwerty!
Ik was tevreden over de macbook pros die ik heb, maar vind online amper informatie over Debian op die retina Macbook Pro.
Heel wat laptops komen met Intel hd 4000 video, werkt die vlot onder Linux ?
Zou je vandaag nog Lenovo Thinkpad aanraden ? Zo ja welke ?
- moet uiteraard Debian kunnen draaien zonder proprietary binary drivers (dus radeon hd?)
- liefst zonder Microsoft of Apple tax
- kleine harde schijf (ik gebruik amper 50GB)
- rond de 8GB ram
- snelle cpu i5 of i7
- maar wil vooral dus dat Debian er op werkt...
- us qwerty!
Ik was tevreden over de macbook pros die ik heb, maar vind online amper informatie over Debian op die retina Macbook Pro.
Heel wat laptops komen met Intel hd 4000 video, werkt die vlot onder Linux ?
Zou je vandaag nog Lenovo Thinkpad aanraden ? Zo ja welke ?
2013-08-04
Recovering lvm2 on degraded mdadm raid 1
An mdadm raid 1 had one disk crash, the other was moved to a new computer (/dev/sdb2).
Step 1: Does fdisk see the disk: yes
Step 2: Gently look with fsck, yes it is part of mdadm
Step 3: Let's see what mdadm says
Step 4: Let's fix the md device
Step 5: Gently look with mount and lvs/pvs
Step 6: Fix the lvm2 device
Step 1: Does fdisk see the disk: yes
root@debian6~# fdisk -l /dev/sdb Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00060f19 Device Boot Start End Blocks Id System /dev/sdb1 1 254 2040254+ 83 Linux /dev/sdb2 255 121602 974722329 83 Linux
Step 2: Gently look with fsck, yes it is part of mdadm
root@debian6~# fsck -n /dev/sdb2 fsck from util-linux-ng 2.17.2 fsck: fsck.linux_raid_member: not found fsck: Error 2 while executing fsck.linux_raid_member for /dev/sdb2
Step 3: Let's see what mdadm says
root@debian6~# mdadm --examine /dev/sdb2 /dev/sdb2: Magic : a92b4efc Version : 1.0 Feature Map : 0x0 Array UUID : e8221214:354aaaf1:e9e15d78:075bfc18 Name : storage:1 Creation Time : Thu May 6 20:00:16 2010 Raid Level : raid1 Raid Devices : 2 Avail Dev Size : 1949444384 (929.57 GiB 998.12 GB) Array Size : 1949444384 (929.57 GiB 998.12 GB) Super Offset : 1949444640 sectors State : clean Device UUID : 0c265a25:cc3f2ddd:ae7a1511:f447c74e Update Time : Tue May 1 23:09:11 2012 Checksum : 498b9bd4 - correct Events : 33039098 Device Role : Active device 0 Array State : A. ('A' == active, '.' == missing)
Step 4: Let's fix the md device
root@debian6~# mdadm --assemble --scan mdadm: /dev/md/storage:1 has been started with 1 drive (out of 2). mdadm: /dev/md/0_0 has been started with 1 drive (out of 2). root@debian6~# cat /proc/mdstat Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] md126 : active (auto-read-only) raid1 sdb1[0] 2040128 blocks [2/1] [U_] md127 : active (auto-read-only) raid1 sdb2[0] 974722192 blocks super 1.0 [2/1] [U_] unused devices:
root@debian6~# fdisk -l .... Disk /dev/md127: 998.1 GB, 998115524608 bytes 2 heads, 4 sectors/track, 243680548 cylinders Units = cylinders of 8 * 512 = 4096 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/md127 doesn't contain a valid partition table
Step 5: Gently look with mount and lvs/pvs
root@debian6~# mount /dev/md127 /mnt mount: unknown filesystem type 'LVM2_member' root@debian6~# lvs No volume groups found root@debian6~# pvs
Step 6: Fix the lvm2 device
root@debian6~# vgscan Reading all physical volumes. This may take a while... Found volume group "md1_vg" using metadata type lvm2 root@debian6~# vgs VG #PV #LV #SN Attr VSize VFree md1_vg 1 1 0 wz--n- 929.57g 0 root@debian6~# pvs PV VG Fmt Attr PSize PFree /dev/md127 md1_vg lvm2 a- 929.57g 0 root@debian6~# lvs LV VG Attr LSize Origin Snap% Move Log Copy% Convert md1vol1 md1_vg -wi--- 929.57g
Step 7: The lvm2 device is not activated, yet
root@debian6~# lvdisplay --- Logical volume --- LV Name /dev/md1_vg/md1vol1 VG Name md1_vg LV UUID qSpslc-nO70-8jjX-5lBl-ge20-fFdR-dSEnWk LV Write Access read/write LV Status NOT available LV Size 929.57 GiB Current LE 475938 Segments 1 Allocation inherit Read ahead sectors auto
Step 8: Activate lvm2 device and mount
root@debian6~# vgchange -a y 1 logical volume(s) in volume group "md1_vg" now active root@debian6~# mount /dev/md1_vg/md1vol1 /mnt root@debian6~# mount | grep mnt /dev/mapper/md1_vg-md1vol1 on /mnt type xfs (rw)
2013-07-31
2013-06-27
Looking for one SunFire v210
Dear Lazyweb,
I've got three SunFire V210 machines and want to set them up for a school.
But, I don't have the ALOM password and I don't have the Solaris root password. Either one of those would allow me to reset the other.
So I am looking for someone who can lend me either a bootable disk that fits in these servers, or a SunFire V210 with admin password for ALOM.
Yes, they will run Debian once I get access to the ALOM.
I've got three SunFire V210 machines and want to set them up for a school.
But, I don't have the ALOM password and I don't have the Solaris root password. Either one of those would allow me to reset the other.
So I am looking for someone who can lend me either a bootable disk that fits in these servers, or a SunFire V210 with admin password for ALOM.
Yes, they will run Debian once I get access to the ALOM.
2013-05-29
MS Exchange on Samba4 ;-)
One of my students tried to install Microsoft Exchange 2010 on Samba 4.
The error is hilarious:
"The operating system version of the domain controller is 4.0.6. The minimum version required is 5.2"
The error is hilarious:
"The operating system version of the domain controller is 4.0.6. The minimum version required is 5.2"
2013-04-01
kassa niet geopend bij nmbs.be ??
Ja het is 1 april, maar toch. ...dan maar zonder kaartje de trein op.
2013-03-16
Do no evil...
I know, when a service is free one should not complain when this service ends.
Google had the option to put open source and open standards on the map, but it appears they are moving away from both.
It started a while ago when the Open Document standard was no longer supported in Google Docs but Microsoft's coup d'état on ISO remains supported.
It got worse this week:
- Google Reader is canceled (over 112.000 votes in this petition to keep it)
- ad-blocker is thrown out of the android market
- rss reader plugin is removed from Chrome
- jabber invites from third party clients are refused (or is this some spam prevention thing?)
Google is not evil yet... they give us a descent export option in Google Reader and several months to migrate to another feedreader. But I will use this time to think about alternatives for all free Google services.
I hear Samsung is moving to Tizen for their all smartphones and tablets ... are they the Good Guys now ?
Google had the option to put open source and open standards on the map, but it appears they are moving away from both.
It started a while ago when the Open Document standard was no longer supported in Google Docs but Microsoft's coup d'état on ISO remains supported.
It got worse this week:
- Google Reader is canceled (over 112.000 votes in this petition to keep it)
- ad-blocker is thrown out of the android market
- rss reader plugin is removed from Chrome
- jabber invites from third party clients are refused (or is this some spam prevention thing?)
Google is not evil yet... they give us a descent export option in Google Reader and several months to migrate to another feedreader. But I will use this time to think about alternatives for all free Google services.
I hear Samsung is moving to Tizen for their all smartphones and tablets ... are they the Good Guys now ?
2013-02-10
traceroute, a new hope
traceroute to 216.81.59.173 (216.81.59.173), 90 hops max, 60 byte packets
1 192.168.1.1 (192.168.1.1) 3.622 ms 4.891 ms 6.368 ms
2 bras05.sn.be.edpnet.net (213.219.132.17) 15.732 ms 16.257 ms 17.796 ms
3 212.71.17.1.res.static.edpnet.net (212.71.17.1) 19.344 ms 21.439 ms 22.376 ms
4 router03.adamtel.nl.edpnet.net (212.71.1.225) 27.927 ms 28.969 ms 30.982 ms
5 20gigabitethernet1-3.core1.ams1.he.net (195.69.145.150) 33.072 ms 36.624 ms 39.553 ms
6 10gigabitethernet2-1.core1.par2.he.net (184.105.213.102) 48.215 ms 29.036 ms 34.954 ms
7 10gigabitethernet7-1.core1.ash1.he.net (184.105.213.93) 106.014 ms 106.260 ms 118.466 ms
8 10gigabitethernet1-2.core1.atl1.he.net (184.105.213.110) 115.431 ms 116.863 ms 118.843 ms
9 216.66.0.26 (216.66.0.26) 121.510 ms 124.011 ms 124.703 ms
10 * * *
11 Episode.IV (206.214.251.1) 168.761 ms * *
12 * A.NEW.HOPE (206.214.251.6) 143.805 ms *
13 It.is.a.period.of.civil.war (206.214.251.9) 147.454 ms 147.371 ms 146.906 ms
14 Rebel.spaceships (206.214.251.14) 151.425 ms 147.288 ms 150.448 ms
15 striking.from.a.hidden.base (206.214.251.17) 150.538 ms 152.009 ms 154.701 ms
16 have.won.their.first.victory (206.214.251.22) 152.704 ms 155.461 ms 159.273 ms
17 against.the.evil.Galactic.Empire (206.214.251.25) 161.156 ms 162.975 ms 164.736 ms
18 During.the.battle (206.214.251.30) 163.928 ms 166.177 ms 167.020 ms
19 Rebel.spies.managed (206.214.251.33) 176.354 ms * *
20 to.steal.secret.plans (206.214.251.38) 147.308 ms 150.271 ms 150.038 ms
21 to.the.Empires.ultimate.weapon (206.214.251.41) 149.920 ms 150.853 ms 151.340 ms
22 the.DEATH.STAR (206.214.251.46) 151.420 ms 150.189 ms 154.217 ms
23 an.armored.space.station (206.214.251.49) 155.079 ms 155.874 ms 158.325 ms
24 * * with.enough.power.to (206.214.251.54) 148.752 ms
25 destroy.an.entire.planet (206.214.251.57) 150.328 ms 151.625 ms 153.964 ms
26 Pursued.by.the.Empires (206.214.251.62) 155.382 ms 155.399 ms 153.755 ms
27 sinister.agents (206.214.251.65) 153.342 ms 160.143 ms 160.158 ms
28 Princess.Leia.races.home (206.214.251.70) 149.600 ms 147.559 ms 152.637 ms
29 aboard.her.starship (206.214.251.73) 150.486 ms 154.099 ms 178.102 ms
30 custodian.of.the.stolen.plans (206.214.251.78) 189.945 ms 189.366 ms 188.650 ms
31 that.can.save.her (206.214.251.81) 185.738 ms 180.003 ms 181.640 ms
32 people.and.restore (206.214.251.86) 171.094 ms 177.440 ms 144.850 ms
33 freedom.to.the.galaxy (206.214.251.89) 144.029 ms 145.266 ms 150.081 ms
34 0-------------------0 (206.214.251.94) 151.244 ms 156.762 ms 160.833 ms
35 0------------------0 (206.214.251.97) 159.813 ms 161.164 ms 162.849 ms
36 0-----------------0 (206.214.251.102) 163.145 ms 159.603 ms 147.615 ms
37 0----------------0 (206.214.251.105) 150.190 ms 151.956 ms 146.340 ms
38 0---------------0 (206.214.251.110) 148.933 ms 146.840 ms 149.713 ms
39 0--------------0 (206.214.251.113) 152.890 ms 153.403 ms 156.115 ms
40 0-------------0 (206.214.251.118) 153.161 ms 152.886 ms 148.248 ms
41 0------------0 (206.214.251.121) 147.398 ms 148.736 ms 164.282 ms
42 0-----------0 (206.214.251.126) 152.791 ms 152.047 ms 154.600 ms
43 0----------0 (206.214.251.129) 151.762 ms 151.899 ms 152.662 ms
44 0---------0 (206.214.251.134) 150.941 ms 152.273 ms 145.665 ms
45 0--------0 (206.214.251.137) 145.340 ms * 146.452 ms
46 0-------0 (206.214.251.142) 155.372 ms 154.245 ms 147.372 ms
47 0------0 (206.214.251.145) 154.361 ms 154.935 ms 151.986 ms
48 0-----0 (206.214.251.150) 153.716 ms 153.269 ms 148.655 ms
49 0----0 (206.214.251.153) 150.001 ms 148.330 ms 151.759 ms
50 0---0 (206.214.251.158) 145.694 ms 152.570 ms 146.604 ms
51 0--0 (206.214.251.161) 152.259 ms 152.723 ms 152.369 ms
52 0-0 (206.214.251.166) 152.662 ms 147.501 ms 148.572 ms
53 00 (206.214.251.169) 152.226 ms 148.481 ms 149.609 ms
54 I (206.214.251.174) 155.151 ms 153.346 ms 148.142 ms
55 By.Ryan.Werber (206.214.251.177) 150.421 ms 154.800 ms 154.859 ms
56 When.CCIEs.Get.Bored (206.214.251.182) 154.162 ms 148.370 ms 144.950 ms
57 read.more.at.beaglenetworks.net (206.214.251.185) 147.360 ms 157.387 ms 157.877 ms
58 FIN (206.214.251.190) 150.940 ms * *
1 192.168.1.1 (192.168.1.1) 3.622 ms 4.891 ms 6.368 ms
2 bras05.sn.be.edpnet.net (213.219.132.17) 15.732 ms 16.257 ms 17.796 ms
3 212.71.17.1.res.static.edpnet.net (212.71.17.1) 19.344 ms 21.439 ms 22.376 ms
4 router03.adamtel.nl.edpnet.net (212.71.1.225) 27.927 ms 28.969 ms 30.982 ms
5 20gigabitethernet1-3.core1.ams1.he.net (195.69.145.150) 33.072 ms 36.624 ms 39.553 ms
6 10gigabitethernet2-1.core1.par2.he.net (184.105.213.102) 48.215 ms 29.036 ms 34.954 ms
7 10gigabitethernet7-1.core1.ash1.he.net (184.105.213.93) 106.014 ms 106.260 ms 118.466 ms
8 10gigabitethernet1-2.core1.atl1.he.net (184.105.213.110) 115.431 ms 116.863 ms 118.843 ms
9 216.66.0.26 (216.66.0.26) 121.510 ms 124.011 ms 124.703 ms
10 * * *
11 Episode.IV (206.214.251.1) 168.761 ms * *
12 * A.NEW.HOPE (206.214.251.6) 143.805 ms *
13 It.is.a.period.of.civil.war (206.214.251.9) 147.454 ms 147.371 ms 146.906 ms
14 Rebel.spaceships (206.214.251.14) 151.425 ms 147.288 ms 150.448 ms
15 striking.from.a.hidden.base (206.214.251.17) 150.538 ms 152.009 ms 154.701 ms
16 have.won.their.first.victory (206.214.251.22) 152.704 ms 155.461 ms 159.273 ms
17 against.the.evil.Galactic.Empire (206.214.251.25) 161.156 ms 162.975 ms 164.736 ms
18 During.the.battle (206.214.251.30) 163.928 ms 166.177 ms 167.020 ms
19 Rebel.spies.managed (206.214.251.33) 176.354 ms * *
20 to.steal.secret.plans (206.214.251.38) 147.308 ms 150.271 ms 150.038 ms
21 to.the.Empires.ultimate.weapon (206.214.251.41) 149.920 ms 150.853 ms 151.340 ms
22 the.DEATH.STAR (206.214.251.46) 151.420 ms 150.189 ms 154.217 ms
23 an.armored.space.station (206.214.251.49) 155.079 ms 155.874 ms 158.325 ms
24 * * with.enough.power.to (206.214.251.54) 148.752 ms
25 destroy.an.entire.planet (206.214.251.57) 150.328 ms 151.625 ms 153.964 ms
26 Pursued.by.the.Empires (206.214.251.62) 155.382 ms 155.399 ms 153.755 ms
27 sinister.agents (206.214.251.65) 153.342 ms 160.143 ms 160.158 ms
28 Princess.Leia.races.home (206.214.251.70) 149.600 ms 147.559 ms 152.637 ms
29 aboard.her.starship (206.214.251.73) 150.486 ms 154.099 ms 178.102 ms
30 custodian.of.the.stolen.plans (206.214.251.78) 189.945 ms 189.366 ms 188.650 ms
31 that.can.save.her (206.214.251.81) 185.738 ms 180.003 ms 181.640 ms
32 people.and.restore (206.214.251.86) 171.094 ms 177.440 ms 144.850 ms
33 freedom.to.the.galaxy (206.214.251.89) 144.029 ms 145.266 ms 150.081 ms
34 0-------------------0 (206.214.251.94) 151.244 ms 156.762 ms 160.833 ms
35 0------------------0 (206.214.251.97) 159.813 ms 161.164 ms 162.849 ms
36 0-----------------0 (206.214.251.102) 163.145 ms 159.603 ms 147.615 ms
37 0----------------0 (206.214.251.105) 150.190 ms 151.956 ms 146.340 ms
38 0---------------0 (206.214.251.110) 148.933 ms 146.840 ms 149.713 ms
39 0--------------0 (206.214.251.113) 152.890 ms 153.403 ms 156.115 ms
40 0-------------0 (206.214.251.118) 153.161 ms 152.886 ms 148.248 ms
41 0------------0 (206.214.251.121) 147.398 ms 148.736 ms 164.282 ms
42 0-----------0 (206.214.251.126) 152.791 ms 152.047 ms 154.600 ms
43 0----------0 (206.214.251.129) 151.762 ms 151.899 ms 152.662 ms
44 0---------0 (206.214.251.134) 150.941 ms 152.273 ms 145.665 ms
45 0--------0 (206.214.251.137) 145.340 ms * 146.452 ms
46 0-------0 (206.214.251.142) 155.372 ms 154.245 ms 147.372 ms
47 0------0 (206.214.251.145) 154.361 ms 154.935 ms 151.986 ms
48 0-----0 (206.214.251.150) 153.716 ms 153.269 ms 148.655 ms
49 0----0 (206.214.251.153) 150.001 ms 148.330 ms 151.759 ms
50 0---0 (206.214.251.158) 145.694 ms 152.570 ms 146.604 ms
51 0--0 (206.214.251.161) 152.259 ms 152.723 ms 152.369 ms
52 0-0 (206.214.251.166) 152.662 ms 147.501 ms 148.572 ms
53 00 (206.214.251.169) 152.226 ms 148.481 ms 149.609 ms
54 I (206.214.251.174) 155.151 ms 153.346 ms 148.142 ms
55 By.Ryan.Werber (206.214.251.177) 150.421 ms 154.800 ms 154.859 ms
56 When.CCIEs.Get.Bored (206.214.251.182) 154.162 ms 148.370 ms 144.950 ms
57 read.more.at.beaglenetworks.net (206.214.251.185) 147.360 ms 157.387 ms 157.877 ms
58 FIN (206.214.251.190) 150.940 ms * *
2012-12-20
nxcEditor in Linux
nxcEditor is not in any repositories for Debian or xubuntu (12.10), neither is a recent enough version of gambas3.
To get a recent gambas3 do:
add-apt-repository ppa:nemh/gambas3
aptitude install gambas3
To get nxcEditor do:
wget https://sourceforge.net/projects/nxceditor/files/nxcEditor/nxcEditor_v0.1.1.gambas
You also need nbc and nexttool in /usr/local/bin:
wget https://sourceforge.net/projects/nxceditor/files/nbc_and_nexttool.zip
-rwxr-xr-x 1 root root 3123348 Dec 20 20:21 /usr/local/bin/nbc
-rwxr-xr-x 1 root root 557168 Dec 20 20:05 /usr/local/bin/nexttool
Install ia32-libs if you run 64-bit
aptitude install ia32-libs
Have fun :-)
To get a recent gambas3 do:
add-apt-repository ppa:nemh/gambas3
aptitude install gambas3
To get nxcEditor do:
wget https://sourceforge.net/projects/nxceditor/files/nxcEditor/nxcEditor_v0.1.1.gambas
You also need nbc and nexttool in /usr/local/bin:
wget https://sourceforge.net/projects/nxceditor/files/nbc_and_nexttool.zip
-rwxr-xr-x 1 root root 3123348 Dec 20 20:21 /usr/local/bin/nbc
-rwxr-xr-x 1 root root 557168 Dec 20 20:05 /usr/local/bin/nexttool
Install ia32-libs if you run 64-bit
aptitude install ia32-libs
Have fun :-)
2012-11-11
tmux
tmux is now the first command that I type after logging on to a system. I've become a huge fan of it!
Some shortcuts:
tmux at (to reconnect)
Ctrl-b % split screen right
Ctrl-b " split screen bottom
Ctrl-b o go to next panel
Ctrl-b q select a panel
Ctrl-b d detach
Some shortcuts:
tmux at (to reconnect)
Ctrl-b % split screen right
Ctrl-b " split screen bottom
Ctrl-b o go to next panel
Ctrl-b q select a panel
Ctrl-b d detach
2012-11-02
Things I do not understand...
1. Everybody I have ever met agrees that Belgium needs one uniform nationwide voting ballot during national elections, allowing all Belgians to vote for all political parties, without any kind of regional or cultural restrictions. So why don't we have this yet?
2. Out of six train rides I took this week, six arrived late. Worst was about 30 minutes late, second worst about 12 minutes late. Why doesn't the train company create a real train schedule ? Why is management not fired for this?
3. Most working people have to get to work about 240 days per year. There are 365 days in a year and yet the majority of workers insist on commuting on the exact same time and the exact same days (Monday to Friday), thus creating huge traffic jams. Why not ditch this legacy Middle Aged system of weekdays land use all 365 days of the year in a sensible way?
4. Why the hell are we changing the time twice a year ? It has been proven multiple times that "daylight savings" is wasting energy!
2. Out of six train rides I took this week, six arrived late. Worst was about 30 minutes late, second worst about 12 minutes late. Why doesn't the train company create a real train schedule ? Why is management not fired for this?
3. Most working people have to get to work about 240 days per year. There are 365 days in a year and yet the majority of workers insist on commuting on the exact same time and the exact same days (Monday to Friday), thus creating huge traffic jams. Why not ditch this legacy Middle Aged system of weekdays land use all 365 days of the year in a sensible way?
4. Why the hell are we changing the time twice a year ? It has been proven multiple times that "daylight savings" is wasting energy!
2012-09-17
42 Legacy IT Books
10 euro for this collection of legacy IT books (picture shows one third of the stack). To be picked up or delivered in Antwerp or Mechelen.English
1985, Commodore, Microsoft Basic for the Amiga
1992, Compaq, Microsoft Windows 3.1 User's Guide
1993, Hamit, Virtual Reality and the Exploration of Cyberspace
1994, IBM PC DOS and MS Windows User's Guide
1994, IBM User's Guide to OS/2
1994, Introduction to Novell Netware 4 Directory Services
1995, IBM Client/Server Guide (OS/2, Lotus, CICS, ...)
1996, IBM Getting Started and Managing the Library1998, Fast Track MCSE (six books on NT4 MCSE)
2000, Cisco, Huston, Internet Performance Survival Guide (QoS)
2000, Siyan, Windows 2000 TCP/IP
2000, Goralski-Kolon, IP Telephony (voip)
2000, Cisco, Benny Bing, Wireless Local Area Networks
2001, Houde-Hoffman, TCP/IP for Windows 2000
2001, Telindus Telecommunications Glossary
2001, Cisco Systems, L3-Enabled ATM Solutions
2002, iRobot Roomba Quick Start Guide
2002, iRobot Roomba Owner's Manual
2003, Solaris 9 for Dummies2005, Otey, MS SQL Server 2005 New Features
2004, Suse Linux Fundamentals (Novell Training)
2004, Suse Linux Administration (Novell Training)
2004, Suse Linux Administration part 2 (Novell Training)
2004, Suse Linux Advanced Administration (Novell Training)
Dutch
1981, Kane, Leventhal, Hawkins, 68000 Machinetaal programmeren
1983, King/Knight, De M68000 processor
1984, Chriet Titulaer, Dit zou je moeten weten over computers
1985, Buyst, Structuur en Organisatie van Computersystemen boek 3: binaire gegevens
1986, Commodore, Kennismaking met de Amiga 500
1987, Dittrich ea, Amiga Intern
1987, Palmans, Vensters op informatica
1990, Findlay/Watt, PASCAL inleiding tot gestructureerd programmeren
1990, De Vlaeminck, Verbaeten, Beredeneerd ontwerpen van programma's in PASCAL
1990, Verkoulen, cursus COBOL 85
1992, Buyst, Lagere programmeertaal en machinetaal
1992, Buyst, Computer Apparatuur
1992, Buyst, Structuur en Organisatie van Computersystemen boek 5: datacommunicatie en computernetwerken
1993, van der Lans, het SQL leerboek
1995, PC Undergound (o.a. x86 assembler)
1997, De Essenties van MCSE Networking Studie Gids
2012-09-01
using bind to block domains
Is this bind usage a good way to block domains on a local network ?
Or is there an obvious better solution ?
root@gwen:/etc/bind# tail -2 named.conf.local
zone "facebook.com" { type master; file "/etc/bind/db.block"; };
zone "twitter.com" { type master; file "/etc/bind/db.block"; };
root@gwen:/etc/bind# cat db.block
$TTL 24h
@ IN SOA ns1.antwerp.local. paul.cobbaut.gmail.com. (
2012082800 86400 300 604800 3600 )
@ IN NS ns1.antwerp.local.
@ IN A 127.0.0.1
* IN A 127.0.0.1
Or is there an obvious better solution ?
2012-07-27
Making sense of a serial connection to an ss4000 NAS
update: I consider the unit bricked and will donate it to an open source enthusiast.
I'm trying to make sense of this serial connection on my Intel ss4000 nas (a better picture can be seen here).
The pin header has a whole in its casing on one side, and as far as I can tell from pictures on the internet the red line of this little cable should be on the right side, as in this picture:
cu -l /dev/ttyS0 -s 9600 cu -l /dev/ttyS0 -s 19200 cu -l /dev/ttyS0 -s 115200 cu -o -l /dev/ttyS0 -s 9600 cu -o -l /dev/ttyS0 -s 19200 cu -o -l /dev/ttyS0 -s 115200 screen -l /dev/ttyS0 9600 screen -l /dev/ttyS0 9600 8N1 screen -l /dev/ttyS0 19200 screen -l /dev/ttyS0 38400 screen -l /dev/ttyS0 115200
115200 should be the correct transfer rate.
If I connect the little cable with the red line on the left side (pin 9 of the header according to this blog) like in the below picture, then all of the above commands give me lots of garbage (at different speeds...) on the screen.
(*) The NAS does not respond to ssh or ping since the last 'aptitude update && aptitude upgrade' :(
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