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• What to do with old laptop screens?

  - by Lord Torgamus

  This question is inspired by another SU question I came across earlier today: What to do with old hard drives? It made me think about two long-dead laptops I have with perfectly good screens still inside. One is a Dell Inspiron 5100 and the other is an Averatec E1200, but responses need not be geared towards those particular models' screens. Rules, based heavily on the original question's: Objectives and suggestions to keep in mind when you post an answer : Should showcase your geekiness, be plain ol' fun, serve a social purpose or benefit the community. Your answer need not be limited to only one screen. For a really good answer, I'll go out and buy additional leftover screens. Your answer need not be limited to one project per screen. If additional accessories need be purchased, make sure they are common. Don't tell me to get a moon rock or something. The projects you suggested should serve a useful purpose; art is nice, but functional art is way better. Thanks in advance, folks. EDIT: Found another related question. Fun projects to do with an old 17" LCD monitor EDIT 2: I, for one, am enjoying the new outpouring of creativity here. Best fifty bucks... I mean, rep points... I ever spent. EDIT 3: That does it. At the end of the week, there was a tie for most votes between the accepted answer and the game platform answer. The game platform answer was cooler, but less reasonable as a project to actually do; in other words, it was more moon rocky. Unfortunately, I think fencepost had the best comment on the topic, which is that displays on their own have no good interface. Thanks for playing, everyone!

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• Route web browsing through a separate iterface

  - by tkane

  I'd like to route web browsing through the wlan0 interface and the rest through eth1. Can you please help me with the iptables commands to achieve this. Below is my configuration. Thank you :) Edit: This is about desktop configuration not a web server set up. Basically I want to use one of my connections to browse the web and the other one for everything else. ifconfig: eth1 Link encap:Ethernet HWaddr 00:1d:09:59:80:70 inet addr:192.168.2.164 Bcast:192.168.2.255 Mask:255.255.255.0 inet6 addr: fe80::21d:9ff:fe59:8070/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:33 errors:0 dropped:0 overruns:0 frame:0 TX packets:41 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:4771 (4.7 KB) TX bytes:7081 (7.0 KB) Interrupt:17 wlan0 Link encap:Ethernet HWaddr 00:1c:bf:90:8a:6d inet addr:192.168.1.70 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::21c:bfff:fe90:8a6d/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:77 errors:0 dropped:0 overruns:0 frame:0 TX packets:102 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:14256 (14.2 KB) TX bytes:14764 (14.7 KB) route: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.2.0 * 255.255.255.0 U 1 0 0 eth1 192.168.1.0 * 255.255.255.0 U 2 0 0 wlan0 link-local * 255.255.0.0 U 1000 0 0 wlan0 default adsl 0.0.0.0 UG 0 0 0 eth1

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• Use preforker(ruby gem) with supervisor

  - by user1548832

  I also asked same question on stackoverflow.com http://stackoverflow.com/questions/13871169/use-preforkerruby-gem-with-supervisor But, superuser.com might much help to me. Can anyone amswer this? I want to run a server program using preforker ruby gem with supervisor. But error has occured. I wrote a following test program using preforker. #!/usr/bin/env ruby require 'rubygems' require 'preforker' Preforker.new(:app_name => 'test-preforker', :timeout => 60, :workers => 1) do |master| while master.wants_me_alive? do puts "hello" sleep 10 end end.run And a following supervisor config. [program:test-preforker] command=/home/tkono/tmp/test-preforker.rb stdout_logfile_maxbytes=1MB stderr_logfile_maxbytes=1MB stdout_logfile=/var/log/%(program_name)s.log stderr_logfile=/var/log/%(program_name)s.log autorestart=true Then, reload supervisor. # supervisorctl reload Restarted supervisord Here is the log file of supervisor. 2012-12-13 17:50:47,161 CRIT Supervisor running as root (no user in config file) 2012-12-13 17:50:47,163 WARN Included extra file "/etc/supervisor.d/test-preforker.ini" during parsing 2012-12-13 17:50:47,209 INFO RPC interface 'supervisor' initialized 2012-12-13 17:50:47,213 CRIT Server 'unix_http_server' running without any HTTP authentication checking 2012-12-13 17:50:47,215 INFO supervisord started with pid 12437 2012-12-13 17:50:48,231 INFO spawned: 'test-preforker' with pid 12440 2012-12-13 17:50:48,233 INFO exited: test-preforker (exit status 1; not expected) 2012-12-13 17:50:49,248 INFO spawned: 'test-preforker' with pid 12441 2012-12-13 17:50:49,261 INFO exited: test-preforker (exit status 1; not expected) 2012-12-13 17:50:51,267 INFO spawned: 'test-preforker' with pid 12442 2012-12-13 17:50:51,284 INFO exited: test-preforker (exit status 1; not expected) 2012-12-13 17:50:54,305 INFO spawned: 'test-preforker' with pid 12443 2012-12-13 17:50:54,308 INFO exited: test-preforker (exit status 1; not expected) 2012-12-13 17:50:55,311 INFO gave up: test-preforker entered FATAL state, too many start retries too quickly Please tell me what is wrong? A program using preforker cannot run with supervisor? preforker https://github.com/dcadenas/preforker supervisor http://supervisord.org/index.html

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• map linux drives to windwos 7 for media stream over internet

  - by Ortix92

  I'm trying to map a linux network drive to my windows 7 laptop, however this laptop is not on LAN. At home, I simply use Samba, but this obviously won't work over the internet. I'm trying to avoid VPN, so if there are other solutions, I would like to know about them. The reason I ask is because my university does this as well. We can simply map folders to our computers without VPN connections. I'm not sure what they are running as servers. The main reason is because I want to be able to access my files stored on my home server wherever I go. They are located in the /home/ folder (videos, music and pictures folder). I'm trying to keep my websites and media separate from each other. I wouldn't mind accessing them from a web interface either, but I would like to keep the directory structure intact. I remember having an app like that come with winamp and running it on my windows pc (As the server). Unfortunately it doesn't work for linux. Any ideas on what I could use? Would XBMC be able to help me out with this? I did do some researching but I couldn't find any concrete answers

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• Why is this iptables rule that does port forwarding not working?

  - by videoguy

  I have a server bound to localhost:7060. It is using ipv6 socket instead of ipv4. Below is netstat outout. # netstat -an Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 10.200.32.98:1720 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:4122 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:4123 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:4123 127.0.0.1:43051 ESTABLISHED tcp 0 0 10.200.32.98:5555 10.200.32.44:53162 ESTABLISHED tcp6 0 0 :::5060 :::* LISTEN tcp6 0 0 ::ffff:127.0.0.1:7060 :::* LISTEN tcp6 0 0 :::23 :::* LISTEN tcp6 0 0 ::ffff:10.200.32.98:23 ::ffff:10.200.32.142:43505 ESTABLISHED tcp6 0 0 ::ffff:127.0.0.1:43051 ::ffff:127.0.0.1:4123 ESTABLISHED tcp6 0 0 ::ffff:10.200.32.98:23 ::ffff:10.200.32.44:53195 ESTABLISHED udp6 0 0 :::5060 :::* CLOSE # I want to setup a port forwarding rule that accepts connections on port 24 (on all interfaces loopback as well as eth0) and forward the data to localhost:7060. This is how I am setting up the iptables rule: iptables -t nat -A PREROUTING -p tcp --dport 24 -j DNAT --to 127.0.0.1:7060** It is not working. When I telnet from different box, I see the following $telnet 10.200.32.98 24 Trying 10.200.32.98... If I change the server to bind to *:7060 and set the following rule, it seems to work fine. iptables -t nat -A PREROUTING -p tcp --dport 24 -j REDIRECT --to-port 7060 But that will make my server available on WAN interface which I don't like. I feel it had something to do with ipv6 socket (tcp6 line in netstat output). This whole thing is done on an Android device with custom built Android platform image. How do I get this working?

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• What could cause Windows 7 to hang whenever I install something?

  - by Larsenal

  I've had this problem when installing several different programs (iTunes, Adobe Acrobat Reader just to name two). Regardless of what the program is, the install usually gets at least 90% through the process and then just hangs. I don't see anything bad in the event log besides the following (and this didn't occur exactly at the time of install): wuaueng.dll (964) SUS20ClientDataStore: A request to write to the file "C:\Windows\SoftwareDistribution\DataStore\DataStore.edb" at offset 16252928 (0x0000000000f80000) for 32768 (0x00008000) bytes succeeded, but took an abnormally long time (185 seconds) to be serviced by the OS. This problem is likely due to faulty hardware. Please contact your hardware vendor for further assistance diagnosing the problem. I've run check disk and it passed. I've had some problems with BIOS settings in the past with Windows 7, but I'm not sure whether that could be related. Update... I also see this error in the event log: Volume Shadow Copy Service error: Unexpected error querying for the IVssWriterCallback interface. hr = 0x80070005, Access is denied. . This is often caused by incorrect security settings in either the writer or requestor process. Operation: Gathering Writer Data Context: Writer Class Id: {e8132975-6f93-4464-a53e-1050253ae220} Writer Name: System Writer Writer Instance ID: {33493f01-ac1b-4efb-a378-3053ab03100d} One last wrinkle.... I see "Previous versions" of c:\ which look like they correspond to the time of attempted installation.

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• Possible for linux bridge to intercept traffic?

  - by A G

  I have a linux machine setup as a bridge between a client and a server; brctl addbr0 brctl addif br0 eth1 brctl addif br0 eth2 ifconfig eth1 0.0.0.0 ifconfig eth2 0.0.0.0 ip link set br0 up I also have an application listening on port 8080 of this machine. Is it possible to have traffic destined for port 80 to be passed to my application? I have done some research and it looks like it could be done using ebtables and iptables. Here is the rest of my setup: //set the ebtables to pass this traffic up to ip for processing; DROP on the broute table should do this ebtables -t broute -A BROUTING -p ipv4 --ip-proto tcp --ip-dport 80 -j redirect --redirect-target DROP //set iptables to forward this traffic to my app listening on port 8080 iptables -t mangle -A PREROUTING -p tcp --dport 80 -j TPROXY --on-port 8080 --tproxy-mark 1/1 iptables -t mangle -A PREROUTING -p tcp -j MARK --set-mark 1/1 //once the flows are marked, have them delivered locally via loopback interface ip rule add fwmark 1/1 table 1 ip route add local 0.0.0.0/0 dev lo table 1 //enable ip packet forwarding echo 1 > /proc/sys/net/ipv4/ip_forward However nothing is coming into my application. Am I missing anything? My understanding is that the target DROP on the broute BROUTING chain will push it up to be processed by iptables. Secondly, are there any other alternatives I should investigate? Edit: IPtables gets it at nat PREROUTING, but it looks like it drops after that; the INPUT chain (in either mangle or filter) doesn't see the packet.

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• How do you enable webcam support in facebook for ubuntu 10.04?

  - by Jonathan

  I think I have finally arrived at an insolvable equation: Chromium v.7 + Ubuntu 10.04 + Sun Java 6 + Webcam + Facebook + Flash 10 = non-functional All of those items listed above are potential points of failure in this situation, and any help narrowing them down would be fantastic. I am simply trying to enable webcame support directly through Facebooks website. Forum searches and the usual googling turn up few posts related to this specific equation. Two of the major suggestions include: 1) Installing the Sun (I refuse to say oracle sob)-provided Java implementation instead of the OpenJDK normally installed in ubuntu. And yes, after installing it, I did update all my default supports to use the sun commands over the openjdk. 2) Somehow enabling Facebook as a permitted site to access my webcam using Flash settings. I have not been able to explore option 2 because I cannot find a way to adjust the Flash settings in chromium 7. Other factors that do not help include the fact that I am pretty sure facebook changes its webcam interface every 10 seconds just to keep troubleshooters and support personnel on their toes. If anyone has a OTP that informs us of the next shift in the app, a leak would be greatly appreciated! Cheers!

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• What are the replacement options for an IDE hd for a DOS based system?

  - by dummzeuch

  I have got a few "embedded" systems running MSDOS 6.2 which boot from and store data to IDE hard disks. Since these drives are nearing their end of life, the question arises how we can replace them. The requirements are: DOS must be able to install and boot from these drives. They must be able to sustain heavy (mostly) write access. If possible, they should be able to survive moderate vibrations (not too bad since the current hds have survived several years of that) I considered the following options so far: other ide hard drives: Unfortunately modern IDE drives are too large so DOS cannot boot from them even if I create small partitions. Older IDE drives are just that: old, so they are probably not the most reliable ones any more. SSDs: There are a few SSDs with IDE interface available. I have not yet tried them. Does anybody have any experience with them? They look like the ideal replacement provided that DOS can boot from them and that writing speed does not deteriorate too much (the old hds are no race cars either). Compact Flash: There are adapters for using CF with IDE controllers and they work fine. DOS can boot from them and they have no problems at all with vibrations. What I am not sure about is their durability. DOS uses FAT so some very few sectors are written every time the medium is being written to. IDE to SATA converters: I have no idea whether they are any good. Has anybody tried them? It might be an option to use one of these to connect an SATA SSD to the system. Are there any alternatives that I have missed? (We are working on replacing these systems, but it will still take a few years.)

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• Is it possible to to create a live linux iso containing a win xp virtual machine?

  - by mark

  I would like to have a Linux live system that contains a Windows xp virtual machine. This would be run from a bootable USB flash drive. My attempts so far have been unsuccessful. I created a Lubuntu 12.04 virtual machine with VMware. I updated and configured it to my needs, and installed Virtualbox. I then created a Windows xp vm with Virtualbox in the Lubuntu vm. I tested everything and everything worked, including USB devices. I installed Remastersys in the Lubuntu vm, copied the xp vm folder to the /etc/skel folder then created the custom iso with remastersys. I burned the iso and tested it on a laptop. It worked flawlessly. All programs and wireless networking worked. My problem was the xp vm. Virtualbox started fine but would not run the vm. I have the following error: Result Code: NS_ERROR_FAILURE (0x80004005) Component: VirtualBox Interface: IVirtualBox {c28be65f-1a8f-43b4-81f1-eb60cb516e66}. I ran remastersys again changing the permissions on the skel folder to R W for everyone. I also logged into Lubuntu as root and ran remastersys again. Each iso I created worked fine but would not start the xp vm inside. The last attempt virtualbox gave me an access error stating it can not access the virtual disk. Is what I want to do possible? In theory I don't see why it would not work. Is it a permissions issue? Should I create the iso then add the xp vm after by editing the iso by hand? Using a vm and not real hardware as a build machine a problem? Any ideas? keep any responses in laymens terms. I am still a Linux novice.

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• How can see what processes makes my server slow?

  - by Steven

  All my websites on my server are extremely slow or not loading at all. Even server admin (Plesk) will not load some times. There's been no changes to the sites for the last coupple of months. How can I see what processes is making my server slow? My environment looks like this: Server: VPS running Linux 2.8.x OS: Centos 5 Manage interface: Plesk 9.x Memmory: 1024MB CPU: 2.2GHz My websites run on PHP and MySQL. I finally managed to telnet (Putty + SSH) in to my server. Running top did not show any processes using more than max 2% CPU and none were using exesive memmory. I also got a friend to install a program that checks the core files, and all seemed fine. So I'm leaning towards network issues or some other server malfunction. But I'm not able to find out what can be wrong. Here are some answers to Sean Kimball: I don't run mail services on my server yet There are noe specific bandwidth peaks. Prefork looks like this <IfModule prefork.c> StartServers 8 MinSpareServers 5 MaxSpareServers 20 ServerLimit 256 MaxClients 256 MaxRequestsPerChild 4000 </IfModule> Not sure what you mean with DNS question. But I think it's up and running. There are no processes running wild Where can I find avarage load? Telnet is disabled and I have to log in using SSH :)

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• Windows Server 2003 IPSec Tunnel Connected, But Not Working (Possibly NAT/RRAS Related)

  - by Kevinoid

  Configuration I have setup a "raw" IPSec tunnel between a Windows Server 2003 (SBS) machine and a Netgear FVG318 according to the instructions in Microsoft KB816514. The configuration is as follows (using the same conventions as the article): NetA | SBS2003 | FVG318 | NetB 10.0.0.0/24 | 216.x.x.x | 69.y.y.y | 10.0.254.0/24 Both the Main Mode and Quick Mode Security Associations are successfully completed and appear in the IP Security Monitor. I am also able to ping the SBS2003 server on its private address from any computer on NetB. The Problem Any traffic sent from a computer on NetA to NetB, or from SBS2003 to NetB (excluding ICMP Ping responses), is sent out on the public network interface outside the IPSec tunnel (no encryption or header authentication, as if the tunnel were not there). Pings sent from a computer on NetB to a computer on NetA successfully reach computers on NetA, but the responses are silently discarded by SBS2003 (they do not go out in the clear and do not generate any encrypted traffic). Possible Solutions Incorrect Configuration I could have mistyped something, somewhere, or KB816514 could be incorrect in some way. I have tried very hard to eliminate the first option. Have re-created the configuration several times, tried tweaking and adjusting all the settings I could without success (most prevent the SA from being established). NAT/RRAS I have seen multiple posts elsewhere suggesting that this could be due to interaction between NAT and the IPSec filters. Possibly the NetA private addresses get rewritten to 216.x.x.x before being compared with the Quick Mode IPSec filters and don't get tunneled because of the mismatch. In fact, The Cable Guy article from June 2005 "TCP/IP Packet Processing Paths" suggests that this is the case, (see step 2 and 4 of the Transit Traffic path). If this is the case, is there a way to exclude NetA-NetB traffic from NAT? Any thoughts, ideas, suggestions, and/or comments are appreciated.

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• Two network adapters in one WindowsXP PC, how to make them work?

  - by Deele

  I have a need to set up network so I can use two ethernet cards inside one Windows (Windows XP SP2) based PC, one for internet connection, second, for internal LAN. How should I configure each NIC, with what IP's, subnet masks and gateways, so I can use inernet on my PC and get in touch with devices on my LAN? I have found that there are some sort of re routing nessesary inside my PC, but how does it work? I have already set up some configuration already, but I can't use it together with PC #1 NIC #1 connected. I need to disconnect, to access NIC WEB interface. Current configuration: Switch #1 and PC #1 NAS #2 are gigabit one's, so I could access NAS with gigabit speed. PC #1 NIC #1 IP XX.XXX.162.106 SN 255.255.255.248 GW XX.XXX.162.105 PC #1 NIC #2 IP 10.0.0.1 SN 255.255.0.0 GW 0.0.0.0 NAS #1 NIC #1 IP 10.0.0.12 SN 255.255.0.0 GW 0.0.0.0 My question is - what exact configuration should I do for every NIC in this LAN, so it would work? Is it possible to achieve internet access for Laptop, that is inside that NIC #2 LAN (should I just set up basic ICS)?

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• disable specific PCI device at boot

  - by Rhymoid

  I've just reinstalled Debian on my Sony VAIO laptop, and my dmesg and virtual consoles all get spammed with the same messages over and over again. [ 59.662381] hub 1-1:1.0: unable to enumerate USB device on port 2 [ 59.901732] usb 1-1.2: new high-speed USB device number 91 using ehci_hcd [ 59.917940] hub 1-1:1.0: unable to enumerate USB device on port 2 [ 60.157256] usb 1-1.2: new high-speed USB device number 92 using ehci_hcd I believe these messages are coming from an internally connected USB device, most likely the webcam (since that's the only thing that doesn't work). The only way I can seem to have it shut up (without killing my actually useful USB ports) is to disable one of the USB host controllers: # echo "0000:00:1a.0" > /sys/bus/pci/drivers/ehci_hcd/unbind This also takes down my Bluetooth interface, but I'm fine with that. I would like this setting to persist, so that I can painlessly use my virtual console again in case I need it. I want my operating system (Debian amd64) to never wake it up, but I don't know how to do this. I've tried to blacklist the module alias for the PCI device, but it seems to be ignored: $ cat /sys/bus/pci/devices/0000\:00\:1a.0/modalias pci:v00008086d00003B3Csv0000104Dsd00009071bc0Csc03i20 $ cat /etc/modprobe.d/blacklist blacklist pci:v00008086d00003B3Csv0000104Dsd00009071bc0Csc03i20 How do I ensure that this specific PCI device is never automatically activated, without disabling its driver altogether? -edit- The module was renamed recently, now the following works from userland: echo "0000:00:1a.0" > /sys/bus/pci/drivers/ehci-pci/unbind Still, I'm looking for a way to stop the kernel from binding that device in the first place.

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• OpenLDAP 2.4.23 - Debian 6.0 - Import schema - Insufficient access (50)

  - by Yosifov

  Good day to everybody. I'm trying to add a new schema inside OpenLDAP. But getting an error: ldap_add: Insufficient access (50) root@ldap:/# ldapadd -c -x -D cn=admin,dc=domain,dc=com -W -f /tmp/test.d/cn\=config/cn\=schema/cn\=\{5\}microsoft.ldif root@ldap:/# cat /tmp/test.d/cn\=config/cn\=schema/cn\=\{5\}microsoft.ldif dn: cn=microsoft,cn=schema,cn=config objectClass: olcSchemaConfig cn: microsoft olcAttributeTypes: {0}( 1.2.840.113556.1.4.302 NAME 'sAMAccountType' DESC 'Fss ssully qualified name of distinguished Java class or interface' SYNTAX 1.3.6. 1.4.1.1466.115.121.1.27 SINGLE-VALUE ) olcAttributeTypes: {1}( 1.2.840.113556.1.4.146 NAME 'objectSid' DESC 'Fssssull y qualified name of distinguished Java class or interfaced' SYNTAX 1.3.6.1.4. 1.1466.115.121.1.40 SINGLE-VALUE ) olcAttributeTypes: {2}( 1.2.840.113556.1.4.221 NAME 'sAMAccountName' DESC 'Fds sssully qualified name of distinguished Java class or interfaced' SYNTAX 1.3. 6.1.4.1.1466.115.121.1.15 SINGLE-VALUE ) olcAttributeTypes: {3}( 1.2.840.113556.1.4.1412 NAME 'primaryGroupToken' SYNTA X 1.3.6.1.4.1.1466.115.121.1.27 SINGLE-VALUE ) olcAttributeTypes: {4}( 1.2.840.113556.1.2.102 NAME 'memberOf' SYNTAX 1.3.6.1. 4.1.1466.115.121.1.12 SINGLE-VALUE ) olcAttributeTypes: {5}( 1.2.840.113556.1.4.98 NAME 'primaryGroupID' SYNTAX 1.3 .6.1.4.1.1466.115.121.1.27 SINGLE-VALUE ) olcObjectClasses: {0}( 1.2.840.113556.1.5.6 NAME 'securityPrincipal' DESC 'Cso ntainer for a Java object' SUP top AUXILIARY MUST ( objectSid $ sAMAccountNam e ) MAY ( primaryGroupToken $ memberOf $ primaryGroupID ) ) I also tried to add the schema by phpldapadmin, but gain the same error. I'm using the admin user which is specified by default from the begging of the slpad installation. How may I add permissions to this user ? Best wishes

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• Static IP addressing issue in Ubuntu on BeagleBoneBlack Rev C

  - by Stringfellow

  I have my BBB configured to use a static IP address using the following in the file /etc/network/interfaces: allow-hotplug eth0 iface eth0 inet static address 192.168.0.1 netmask 255.255.255.0 network 192.168.0.0 This seems to work ok on boot, but when the ethernet cable is unplugged and then plugged back in, I lose the IP address. Any ideas what's going on here? Another weird symptom: If I boot the BBB with the network cable unplugged, but the switch it's plugged into off, I'll get my static IP. But, when I turn the switch on, I'll get a DHCP-assigned address. This is even though I have it configured with a static IP address. One last thing. If I ifdown etho, the interface will be gone when I do an ifconfig. If I wait a few seconds, though, and then re-run ifconfig, it will reappear, without an IP address. (Before I disabled IPv6, I used to get a IPv4 DHCP address in this case... weird). When that happens, I get a message like this in /var/log/messages: Apr 23 20:32:06 beaglebone kernel: [ 737.170172] libphy: 4a101000.mdio:00 - Link is Up - 100/Full Apr 23 20:32:06 beaglebone kernel: [ 737.170304] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready Here's my uname -a: root@beaglebone:/etc# uname -a Linux beaglebone 3.8.13-bone47 #1 SMP Fri Apr 11 01:36:09 UTC 2014 armv7l GNU/Linux Any ideas what's going on here?

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• Replicated filesystem and EC2 MySQL

  - by El Yobo

  I'm currently investigating migrating our infrastructure over to run on Amazon's EC2 and am trying to figure out the best way to set up a MySQL service. I'm leaning towards running our own MySQL instances, rather than going with Amazon's RDS, but am still considering the best approach for performance and cost on the instance itself. In order to have persistent data, the MySQL data needs to be on an EBS volume (with some form of striped RAID, e.g. RAID0 or RAID10) to improve persistence. However, EBS IO is limited by the network interface (gigabit, so a theoretical maximum of 128 MB/s), while the ephemeral volumes have no such problem. I did see a suggestion for running two MySQL servers on an instance, with a master running on the ephemeral disk (which we would also RAID) and a slave storing changes to an EBS volume, but this has some additional overhead and complexity (two servers). What I was imagining is using some form of replicated file system such that I could have a filesystem on top of a RAID0 of ephemeral volumes to maximise performance all changes from the above immediately replicated to another RAID1 volume backed by multiple EBS volumes to ensure no data loss The advantages of this would be best possible IO performance for the DB server; no network delay in IO decreased IO on EBS volumes (as all read IO will be done on the ephemeral volumes) so decreased cost good data security, as it's backed onto redundant EBS volumes However, I haven't seen an appropriate system to replicate all changes from one volume to the other; is there a filesystem, or any other approach, which will do this? The distributed file systems, e.g. GlusterFS, DRBD etc seem to focus on replicating disks between servers, can they be set up to do what I'm interested in here? I also haven't seen anything about other's taking this approach. Do I have a solution in need of a problem here (i.e. is performance good enough, so this whole idea is redundant)? Is there some flaw in the plan?

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• screen scraper templates for various websites

  - by intuited

  I'm looking specifically for a convenient way to locally archive posts from this and other similar sites. I'd like to separate the question itself from the answers, or maybe crop the question and store it, keeping the page title. Obviously I don't need to store the menu or the various other site interface chrome. The best way to do this would seem to be to associate an XSLT template with a match on the URL and use that template to pull the various relevant informations and format them. My two-part question: Is there a tool specifically built for this task? I.E. something that takes a URL and checks it against a map of path-matching expressions to templates, and outputs the result of applying the template to that resource? xmlto seems to be most of the way there, and could probably just be called from a script that does the pattern-matching, but something already integrated would be more convenient. Is such a URL_pattern-to-XSLT_template map publicly available somewhere? Question 2.5: Is it legal to do this with sites like this one that have public licenses on their content?

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• Different subnets routing with just one layer 3 switch

  - by GustavoFSx

  Our current network looks like this: Location 1: 2 Layer 2 switches | subnet 192.168.1.0/24 | Firewall for our VPN Location 2: 1 Layer 2 switch | subnet 192.168.3.0/24 | Firewall for our VPN Location 3: 1 Layer 2 switch | subnet 192.168.5.0/24 | Firewall for our VPN We just got a direct fiber connection between location 1 and 2, we also got a new HP V1910 24G layer 3 switch. I tried to follow the instructions on this site, but I can't get it to work. I think our network should look like this: Location 1: HP Switch FIBER to L2 | subnet 192.168.1.0/24 | Firewall for our VPN Location 2: 1 Layer 2 switch | subnet 192.168.3.0/24 | FIBER to L1 Location 3: 1 Layer 2 switch | subnet 192.168.5.0/24 | Firewall for our VPN So, how can I get routing working on our location 2? It's old gateway was a firewall device on ip 192.168.3.1. I'm thinking on creating a VLAN Interface on 192.168.3.1 on the switch for the Location 2. But how will I handle that on the HP switch that has a direct fiber connection with that switch? Please help, I'm not very good with networking.

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• Transfer iptables rules to another server (almost) real time

  - by MrShunz

  I'm running 2 cPanel servers with ConfigServer Security & Firewall plugin. One of the functions of the plugin is to block via iptables (temporarily and/or permanently) IPs which fail various authentications (POP3/IMAP, SMTP, FTP, webmail, mod_security and such). Now, i'd like to push those IP blocks to the border router to drop packets as soon as possible (and doing so protecting the other machines on the network). Keep in mind that after N failed logins IP is blocked for 5 minutes, then re-allowed. If multiple bans occours in an hour IP is blocked permanently and should be unlocked "by hand". So I need a near realtime solution. What I'm looking for is a better way than firing some cronjobs both on cPanels and border router to: dump the rules to file transfer the file to border router (via scp/sftp) load the rules from the file in the border router I'm aware that I will need some scripts to parse and modify the rules as cPanels have one ethernet interface and some aliases while border router has two ehternet interfaces and some loopbacks. All machines involved use Linux. EDIT as per @pjmorse comment. The plugin consists of a bunch of perl and config files. The part I'm intrested in is a process which scans logfiles (lfd) and installs iptables rules (and sends an alert email). Fact is, it upgrades quite often (one or two times a week) and itself is 7000 lines of perl so I'm not comfortable on tampering with it.

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• How to use non-free drivers during debian install

  - by blokeley

  I'm trying to install debian stable using unetbootin. The install process fails with "network autoconfiguration failed", probably due to the ethernet driver not working. My Lenovo U350 has a Broadcom BCM57780 which does not seem to be supported out-of-the-box: there are various bug reports here, here and here, but I don't know if the fix has made it into debian (6) stable. One discussion says that you have to use an ethernet driver from the firmware-linux-nonfree package. I'm not sure that this is correct because the BCM57780 is not in the list of drivers in firmware-linux-nonfree. The specific question tree is: Is BCM57780 supported in debian stable? If so, what could be wrong? Should I install debian unstable instead? If not, do I need to use firmware-linux-nonfree during installation and, if so, how do I do this? Please note: I've used ubuntu and debian loads in the past but please post line-by-line guidance rather than some cryptic abbreviation of any instructions. Thanks in advance for any help. Updates: Debian stable with non-free drivers did not work. Debian unstable (free drivers only) did not work. Tried loading firmware-iwlwifi_0.28_all.deb from another USB stick to get wireless working rather than BCM57780. The .deb file was found but the network configuration still failed! That's it, I'm giving up. Unfortunately I'll use ubuntu even though the Unity user interface will be very unstable for the next couple of years :(

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• Preventing back connect in Cpanel servers

  - by Fernando

  We run a Cpanel server and someone gained access to almost all accounts using the following steps: 1) Gained access to an user account due to weak password. Note: this user didn't had shell access. 2) With this user account, he accessed Cpanel and added a cron task. The cron task was a perl script that connected to his IP and he was able to send back shell commands. 3) Having a non jailed shell, he was able to change content of most websites in server specially for users who set their folders to 777 ( Unfortunately a common recommendation and sometimes a requirement for some PHP softwares ). Is there a way to prevent this? We started by disabling cron in Cpanel interface, but this is not enough. I see a lot of other options in which an user could run this perl script. We have a firewall running and blocking uncommon outgoing ports. But he used port 80 and, well, I can't block this port as a lot of processes use them to access things, even Cpanel itself.

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• Shortcuts that make using Windows easier? [closed]

  - by ekaj

  Over the years I have found out a good bit of shortcuts, all of which make using Windows that much faster and easier. I was wondering if I had missed any important ones, or ones that just saved any time. I tried to keep these relative to Windows only, as programs such as Mozilla, Photoshop, etc. bring in hundreds of other shortcuts, which do not apply to all users. These are the current ones I know: For the mouse: Scroll wheel - opens a link in IE into a new tab - closes a specific tab in IE when closed on Right click-n-drag - nifty menu to make a copy of a file or create a shortcut For the keyboard: Cntrl + Alt + Del - need this be explained? WinKey + R - opens 'Run..' WinKey + D - shows the desktop WinKey + E - opens 'My Computer' WinKey + F - opens 'Find..' WinKey + Tab - cool way to switch inbetween windows WinKey + L - locks the computer Alt + Tab - switches windows with a simple interface Alt + F4 - closes windows Alt + F - opens 'File' (Handy for things like IE if you have the menubar disabled) Cntrl + F - find text on current document Cntrl + W - closes a window, or current active tab in IE (or IE itself if only one tab) Cntrl + C - copies selected text / image Cntrl + V - pastes selected text / image So does anyone know of any more shortcuts that just make life easier? I would be much appreciative of any, and I am sure that some other users would like to know some too =]

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• How to fix missing RAID1 drive

  - by Sodved

  I had to do some fiddling about with my cables inside thebox and now I am getting a "Critical Error" about the RAID disks during startup. I have a gigabyte GA-MA770T-UD3 motherboard. Aparently the RAID controller is an AMD SB710 chip. I'm pretty sure I know what happenned. The first time I rebooted I had forgotten the power cable on one of the disks in the RAID1 (mirror) and let it boot up. So I shut down and put the power back in. So now when it boots up I go into the RAID admin interface (between the BIOS screen and the OS loading): it shows the RAID1 as in error the logical device has one disk and says the other is disconnected or missing the other physical disk shows up as a single disk If I boot to the OS (Windows 7 32 bit) the data all seems to be there. If I go into computer management it says my partition is on a disk and working OK. But the other disk is offline because: "The disk is offline because it has a signature collision with another disk that is online" So I am guessing because I STUPIDLY booted up with only one of the disks powered on, the other disk fell out of synch with the mirror and so now cannot rejoin the mirror. How do I fix this? I want to get the RAID1 mirror working again. There does not appear to be any "Repair" option in the basic RAID admin tool which I get into during startup before the OS boots. I have not made any explicit changes to the online one (but I guess the OS has probably written some admin data).

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• Mixing both local and nonlocal addresses on three switches

  - by klew

  I have four computers that have nonlocal addresses like 150.X.X.X. Now I also get another few computers that should be only accessible through a gateway (it will be computing cluster) and they addresses are 10.0.0.X. I also wanted to include those four older computers to this new cluster, but I want them to be accessible from internet on nonlocal addresses (so I would like to set up them on both 150.X.X.X and 10.0.0.X addresses - I've set up it as interface eth0:0 since I have only one NIC). Those new computers have their switch and old computers also have their own switch. Both of them are connected to another (third) switch. The problem is that those old computers see each other (I can ping them), and also new computers see each other, but I can't ping old computer from new computer and vice versa. However pinging on nonlocal adresses works as expected. I looked into switch configuration and didn't find anything useful. I have no idea what I missed here. Can somebody help? All computers have Ubuntu Server 10.04

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