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• Dlink DWA-556 Access point fails to start on 2.6.35-25 while 2.6.35-24 works. How can I do this with >2.6.35-24?

  - by Azendale

  I'm using hostapd to run an access point with a Dlink DWA-556 wireless N card. However, I can no longer get it to start when I use kernels greater than 2.6.35-24. Here's a log where I ran the uname -a&&hostapd -c <configfile> on the different kernel versions. Linux erikbandersen 2.6.35-24-generic #42-Ubuntu SMP Thu Dec 2 02:41:37 UTC 2010 x86_64 GNU/Linux Configuration file: hostapd.conf ctrl_interface_group=0 Opening raw packet socket for ifindex 248 BSS count 1, BSSID mask ff:ff:ff:ff:ff:ff (0 bits) SIOCGIWRANGE: WE(compiled)=22 WE(source)=21 enc_capa=0xf nl80211: Added 802.11b mode based on 802.11g information HT40: control channel: 2 secondary channel: 6 RATE[0] rate=10 flags=0x2 RATE[1] rate=20 flags=0x6 RATE[2] rate=55 flags=0x6 RATE[3] rate=110 flags=0x6 RATE[4] rate=60 flags=0x0 RATE[5] rate=90 flags=0x0 RATE[6] rate=120 flags=0x0 RATE[7] rate=180 flags=0x0 RATE[8] rate=240 flags=0x0 RATE[9] rate=360 flags=0x0 RATE[10] rate=480 flags=0x0 RATE[11] rate=540 flags=0x0 Passive scanning not supported Mode: IEEE 802.11g Channel: 2 Frequency: 2417 MHz Flushing old station entries Deauthenticate all stations Using interface wlan1 with hwaddr 1c:bd:b9:d5:e8:3c and ssid 'erikbandersen.com/freewifi' wlan1: Setup of interface done. MGMT (TX callback) ACK Malformed netlink message: len=436 left=256 plen=420 256 extra bytes in the end of netlink message MGMT (TX callback) ACK mgmt::proberesp cb MGMT (TX callback) ACK mgmt::proberesp cb MGMT (TX callback) ACK mgmt::proberesp cb mgmt::auth authentication: STA=3c:4a:92:0e:41:2f auth_alg=0 auth_transaction=1 status_code=0 wep=0 New STA wlan1: STA 3c:4a:92:0e:41:2f IEEE 802.11: authentication OK (open system) wlan1: STA 3c:4a:92:0e:41:2f MLME: MLME-AUTHENTICATE.indication(3c:4a:92:0e:41:2f, OPEN_SYSTEM) wlan1: STA 3c:4a:92:0e:41:2f MLME: MLME-DELETEKEYS.request(3c:4a:92:0e:41:2f) authentication reply: STA=3c:4a:92:0e:41:2f auth_alg=0 auth_transaction=2 resp=0 (IE len=0) MGMT (TX callback) ACK mgmt::auth cb wlan1: STA 3c:4a:92:0e:41:2f IEEE 802.11: authenticated mgmt::assoc_req association request: STA=3c:4a:92:0e:41:2f capab_info=0x421 listen_interval=10 Validating WMM IE: OUI 00:50:f2 OUI type 2 OUI sub-type 0 version 1 QoS info 0x0 HT: STA 3c:4a:92:0e:41:2f HT Capabilities Info: 0x102c handle_assoc STA 3c:4a:92:0e:41:2f - no greenfield, num of non-gf stations 1 handle_assoc STA 3c:4a:92:0e:41:2f - 20 MHz HT, num of 20MHz HT STAs 1 hostapd_ht_operation_update current operation mode=0x0 hostapd_ht_operation_update new operation mode=0x7 changes=2 new AID 1 wlan1: STA 3c:4a:92:0e:41:2f IEEE 802.11: association OK (aid 1) MGMT (TX callback) ACK mgmt::assoc_resp cb wlan1: STA 3c:4a:92:0e:41:2f IEEE 802.11: associated (aid 1) wlan1: STA 3c:4a:92:0e:41:2f MLME: MLME-ASSOCIATE.indication(3c:4a:92:0e:41:2f) wlan1: STA 3c:4a:92:0e:41:2f MLME: MLME-DELETEKEYS.request(3c:4a:92:0e:41:2f) wlan1: STA 3c:4a:92:0e:41:2f RADIUS: starting accounting session 4DAC8224-00000000 MGMT (TX callback) ACK mgmt::action cb MGMT (TX callback) ACK mgmt::proberesp cb MGMT (TX callback) ACK mgmt::proberesp cb MGMT (TX callback) ACK mgmt::proberesp cb MGMT (TX callback) ACK mgmt::proberesp cb MGMT (TX callback) ACK mgmt::proberesp cb Signal 2 received - terminating wlan1: STA 3c:4a:92:0e:41:2f MLME: MLME-DEAUTHENTICATE.indication(3c:4a:92:0e:41:2f, 1) wlan1: STA 3c:4a:92:0e:41:2f MLME: MLME-DELETEKEYS.request(3c:4a:92:0e:41:2f) Removing station 3c:4a:92:0e:41:2f hostapd_ht_operation_update current operation mode=0x7 hostapd_ht_operation_update new operation mode=0x0 changes=2 Flushing old station entries Deauthenticate all stations . Linux erikbandersen 2.6.35-25-generic #44-Ubuntu SMP Fri Jan 21 17:40:44 UTC 2011 x86_64 GNU/Linux Configuration file: hostapd.conf ctrl_interface_group=0 Opening raw packet socket for ifindex 248 BSS count 1, BSSID mask ff:ff:ff:ff:ff:ff (0 bits) SIOCGIWRANGE: WE(compiled)=22 WE(source)=21 enc_capa=0xf nl80211: Added 802.11b mode based on 802.11g information Allowed channel: mode=1 chan=1 freq=2412 MHz max_tx_power=27 dBm Allowed channel: mode=1 chan=2 freq=2417 MHz max_tx_power=27 dBm Allowed channel: mode=1 chan=3 freq=2422 MHz max_tx_power=27 dBm Allowed channel: mode=1 chan=4 freq=2427 MHz max_tx_power=27 dBm Allowed channel: mode=1 chan=5 freq=2432 MHz max_tx_power=27 dBm Allowed channel: mode=1 chan=6 freq=2437 MHz max_tx_power=27 dBm Allowed channel: mode=1 chan=7 freq=2442 MHz max_tx_power=27 dBm Allowed channel: mode=1 chan=8 freq=2447 MHz max_tx_power=27 dBm Allowed channel: mode=1 chan=9 freq=2452 MHz max_tx_power=27 dBm Allowed channel: mode=1 chan=10 freq=2457 MHz max_tx_power=27 dBm Allowed channel: mode=1 chan=11 freq=2462 MHz max_tx_power=27 dBm Allowed channel: mode=0 chan=1 freq=2412 MHz max_tx_power=27 dBm Allowed channel: mode=0 chan=2 freq=2417 MHz max_tx_power=27 dBm Allowed channel: mode=0 chan=3 freq=2422 MHz max_tx_power=27 dBm Allowed channel: mode=0 chan=4 freq=2427 MHz max_tx_power=27 dBm Allowed channel: mode=0 chan=5 freq=2432 MHz max_tx_power=27 dBm Allowed channel: mode=0 chan=6 freq=2437 MHz max_tx_power=27 dBm Allowed channel: mode=0 chan=7 freq=2442 MHz max_tx_power=27 dBm Allowed channel: mode=0 chan=8 freq=2447 MHz max_tx_power=27 dBm Allowed channel: mode=0 chan=9 freq=2452 MHz max_tx_power=27 dBm Allowed channel: mode=0 chan=10 freq=2457 MHz max_tx_power=27 dBm Allowed channel: mode=0 chan=11 freq=2462 MHz max_tx_power=27 dBm HT40: control channel: 2 secondary channel: 6 RATE[0] rate=10 flags=0x2 RATE[1] rate=20 flags=0x6 RATE[2] rate=55 flags=0x6 RATE[3] rate=110 flags=0x6 RATE[4] rate=60 flags=0x0 RATE[5] rate=90 flags=0x0 RATE[6] rate=120 flags=0x0 RATE[7] rate=180 flags=0x0 RATE[8] rate=240 flags=0x0 RATE[9] rate=360 flags=0x0 RATE[10] rate=480 flags=0x0 RATE[11] rate=540 flags=0x0 Passive scanning not supported Mode: IEEE 802.11g Channel: 2 Frequency: 2417 MHz Could not set channel for kernel driver wlan1: Unable to setup interface. My wireless card is listed as 02:00.0 Network controller: Atheros Communications Inc. AR5008 Wireless Network Adapter (rev 01) by lspci. Am I doing it wrong and there's a new way of doing it? I'm holding off upgrading to Natty because of this. What changed between the versions that would cause this? Should I report it as a bug?

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• How to install older ruby version on ubuntu Precise Pangolin?

  - by Codestudent

  I got a present: older Rails tutorials that needs old ruby version. I try to install ruby-1.8 with the packet manager. I still got problems with the tutorial example code. Next I try rvm to install the old ruby version. Unfortunately I got an error. I do not know what to do. I search the internet. Many people got no problems with rvm. rvm use *ERROR: Branch origin/ruby_1_8_4 not found.* and *ERROR: Error running 'GEM_PATH="/usr/share/ruby-rvm/gems/ruby-1.8.4- tv1_8_4:/usr/share/ruby-rvm/gems/ruby-1.8.4-tv1_8_4@global:/usr/share/ruby- rvm/gems/ruby-1.8.4-tv1_8_4:/usr/share/ruby-rvm/gems/ruby-1.8.4-tv1_8_4@global" GEM_HOME="/usr/share/ruby-rvm/gems/ruby-1.8.4-tv1_8_4" "/usr/share/ruby- rvm/rubies/ruby-1.8.4-tv1_8_4/bin/ruby" "/usr/share/ruby-rvm/src/rubygems- 1.3.7/setup.rb"', please read /usr/share/ruby-rvm/log/ruby-1.8.4- tv1_8_4/rubygems.install.log* Please give me a hint.

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• How to Calculate TCP Socket Buffer Sizes for Data Guard Environments

  - by alejandro.vargas

  The MAA best practices contains an example of how to calculate the optimal TCP socket buffer sizes, that is quite important for very busy Data Guard environments, this document Formula to Calculate TCP Socket Buffer Sizes.pdf contains an example of using the instructions provided on the best practices document. In order to execute the calculation you need to know which is the band with or your network interface, usually will be 1Gb, on my example is a 10Gb network; and the round trip time, RTT, that is the time it takes for a packet to make a travel to the other end of the network and come back, on my example that was provided by the network administrator and was 3 ms (1000/seconds)

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• Can't mount cds after failed Brasero burn

  - by Allan

  Brasero failed to burn a disk recently, and now I can't access CD-ROMS. Even CD-Rs are not not showing. Using Ubuntu 11.10 on a Dell D510 Lattitude laptop. allan@allan-Latitude-D510:~$ cdrecord -checkdrive Device was not specified. Trying to find an appropriate drive... Detected CD-R drive: /dev/cdrw Using /dev/cdrom of unknown capabilities Device type : Removable CD-ROM Version : 5 Response Format: 2 Capabilities : Vendor_info : 'TSSTcorp' Identification : 'DVD+-RW TS-L532B' Revision : 'DE04' Device seems to be: Generic mmc2 DVD-R/DVD-RW. Using generic SCSI-3/mmc CD-R/CD-RW driver (mmc_cdr). Driver flags : MMC-3 SWABAUDIO BURNFREE Supported modes: TAO PACKET SAO SAO/R96P SAO/R96R RAW/R96R My CD drive is now useless, and any help on getting it to read/burn would be appreciated.

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• Can't load some domain

  - by Grzegorz

  I can't load some domain on my ubuntu 13.04: youtube.com translate.google.com drive.google.com vk.com When I ping them they are responding: PING youtube.com (217.119.79.59) 56(84) bytes of data. 64 bytes from non-registered.plix.pl (217.119.79.59): icmp_req=1 ttl=59 time=21.9 ms 64 bytes from non-registered.plix.pl (217.119.79.59): icmp_req=2 ttl=59 time=20.5 ms 64 bytes from non-registered.plix.pl (217.119.79.59): icmp_req=3 ttl=59 time=21.3 ms --- youtube.com ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 2002ms rtt min/avg/max/mdev = 20.544/21.255/21.914/0.560 ms But they don't load in any browser like firefox, chrome, lynx. They load in my media centre on XBMCbuntu.

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• Error when setting Piwik analytics

  - by bertran

  I've uploaded the latest version of Piwik unto my web server, which is hosted by go daddy.com, on a linux hosting plan. I'm setting it up (accessing it from my browser as instructed) and I have the "Piwikinstallation" page open on step 3 (database set-up ) of 9. I don't know what to imput in the field "database server"... the default is the number 127.0.0.1 When I leave that input as is, and click "Next" leaving the gives the error: "Error when trying to connect to database server: SQLSTATE[HY000] [2013] Lost connection to MySQL server at 'reading initial communication packet', system error: 111" and changing that input to "localhost" gives me another error: "Error when trying to connect to database server:SQLSTATE[HY000] [2002] Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)"

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• Insanity joining Server 12.04 to Windows AD

  - by Andrew Stebenne

  I've seen lots of stuff about this error on the internet, but had no luck implementing a solution. I'm trying to use Likewise-Open to join an Ubuntu Server 12.04 machine to a Windows Active Dicrectory domain controller and having absolutely no luck. I run: sudo domainjoin-cli join my.domain.gob ADMINISTRATOR and get back (after putting in the admin password): Error: DNS_ERROR_BAD_PACKET [code 0x0000251e] A bad packet was recieved from a DNS server. Potentially the requested address does not exist. I have heard that WAD insists on being your only nameserver, and in attempts to make that work, I've tried editing /etc/resolv.conf and /etc/network/interfaces but none of that has worked either. Ideas?

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• Unable to start Server Service on remote machine (2 replies)

  hi, i am trying to start Server service thru .net code on remote machine but unable to do so. here is the code.. ConnectionOptions con new ConnectionOptions(); con.Authority &quot;ntlmdomain:DomainName&quot;; con.Username &quot;x&quot;; con.Password &quot;123456&quot;; con.Impersonation ImpersonationLevel.Impersonate; con.Authentication AuthenticationLevel.Packet; con.EnablePrivileges true; ManagementScope ms new ManagementSco...

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• LibreOffice Math problem with greek letters

  - by Matheus de Araújo

  I've a problem with my LibreOffice. Using an old archive that I have (with the Maxwell's equations), the greek letters are like squares. I tried to change something in the alphabet but even the font don't have any greek letters (they appear like squares too), both Greek and iGreek letters package. Sounds like a packet that isn't installed or corrupted, but I still redownloaded and reinstalled the LO and I don't know whose I have to install. With the OO my equations worked well (I made the file with it). What am I supposed to do?

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• Motivating developers in a project perceived as **dull** ?

  - by Fanatic23

  As a manager, I can't always end up generating work that'd be cutting edge. Some of the projects do run on maintenance mode, and generate a healthy free cash flow for the company. As a developer what would it take for you to stick around in this project? I have been thinking of re-branding the work, but I could do with a lot of help here. Appreciate a single response per post. Please don't suggest an increased pay-packet, this creates more problems than it solves.

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• How much server bandwidth does an average RTS game require per month?

  - by Nat Weiss

  My friend and I are going to write a multiplayer, multiplatform RTS game and are currently analyzing the costs of going with a client-server architecture. The game will have a small map with mostly characters, not buildings (think of DotA or League of Legends). The authoritative game logic will run on the server and message packet sizes will be highly optimized. We'd like to know approximately how much server bandwidth our proposed RTS game would use on a monthly basis, considering these theoretical constants: 100 concurrent users maximum 8 players maximum per game 10 ticks per second Bonus: If you can tell us approximately how much server RAM this kind of game would use that would also help a great deal. Thanks in advance.

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• Getting "boot error" when trying to boot from USB

  - by Jon Ball

  I'm wanting to try out Ubuntu, so followed the instructions for how to install Ubuntu onto a USB. I downloaded the .iso file, then the pendrivelinux 3 part process to make the USB bootable. I can see what looks like a full list of files on the USB (including the wubi.exe application and the syslinux folder). When I try to restart the computer with the USB in, I get the Dell start up screen, and then a black screen with "Boot Error" in the top right hand corner. Setup options (default) are to boot from Removable Device, then Hard Disc. USB is brand new, straight out of the packet. Computer: Dell Inspiron 530S BIOS: 1.0.13 OS: Windows Vista Home Edition USB: EMTEC 8Gb, formatted to FAT32 I've tried some of the tips in other help topics (holding down CTRL key while restarting, removing all other USB devices). I tried to reformat the USB to something other than FAT32, but my only other options were NTFS or exFAT (not FAT16 which was suggested in another topic).

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• Fixed Sized Buffer or Variable Buffers with C# Sockets

  - by Keagan Ladds

  I am busy designing a TCP Server class in C# that has events and allows the user of the class to define packets that the server can send a receive by registering a class that is derived from my "GenericPacket" class. My TCPListener uses Async methods such as .BeginReceive(..); My issue is that because I am using the .BeginReceive(); I need to specify a buffer size when I call the function. This means I cant read the whole packet if one of my defined packets is too big. I have thought of creating a fixed sized Header that gets read using .BeginRead(); and the read the rest using Stream.Read(); but this will lead to the whole server having to wait for this operation to complete. I would like to know if anyone has come across this before and I would appreciate any suggestions.

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• Slow on browsing web, but normal when using apt-get

  - by Arif Setyawan

  I have a problem with my fresh instalation of Ubuntu 11.10. The problem happen when i start up my browser and accessing website such google, askubuntu.com, facebook and other sites. frustate on the situation i try watch the progress in system monitor. the result from monitor shows that there is no data transfer when i try to accessing the page. firstly, i assume that it is the trouble from my ISP or my home connection. But it is not. When i try pinging google it shows transaction between my computer and the network but still null from browser. Then i tried to test the aptitude and it was work fine but still the browser won't recieve any packet from the internet. Here is the detail of my tools : Laptop : Toshiba Satellite e205 (network card atheros) Operating System : Ubuntu 11.04 dual booted with Win7 Browser : Mozilla Firefox comes up with the Ubuntu 11.10 installation Chrome : Last version (just yesterday install it) Thank You before :) [this question posted via win]

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• Sharing SCTP connection with multiple threads

  - by poly

  I have an application that needs to run in SCTP environment, I have a question in sharing the connection among multiple threads for packet receiving only, I've tried with the sctp_sendmsg and it worked without even locking the threads (is that been taking care of by the OS, in other words, is it thread safe to do that). I've tested many cases with the send and I can't see them out of sync. Anyway, back to the receiving, is it possible to create multiple threads and send each thread the sctp descriptor to start receiving messages? Do I need a lock here or is it ok without lock? I'm using C in linux.

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• How can I set my linux box as a router to forward ip packets?

  - by UniMouS

  I am doing a network experiment about ip packet forwarding, but I don't know why it does work. I have a linux machine with two network interfaces, eth0 and eth1 both with static IP address (eth0: 192.168.100.1, eth1: 192.168.101.2). My goal is simple, I just want to forward ip packets from eth1 with destination in subnet 192.168.100.0/24 to eth0, and forward ip packets from eth0 with destination in subnet 192.168.101.0/24 to eth1. I turned on ip forwarding with: sysctl -w net.ipv4.ip_forward=1 my routing table is like this: # route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.100.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 192.168.101.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 But, when I try to ping from 192.168.100.25 to 192.168.101.47, it does not work.

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• Unable to start Server Service on remote machine (2 replies)

  hi, i am trying to start Server service thru .net code on remote machine but unable to do so. here is the code.. ConnectionOptions con new ConnectionOptions(); con.Authority &quot;ntlmdomain:DomainName&quot;; con.Username &quot;x&quot;; con.Password &quot;123456&quot;; con.Impersonation ImpersonationLevel.Impersonate; con.Authentication AuthenticationLevel.Packet; con.EnablePrivileges true; ManagementScope ms new ManagementSco...

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• Sending files via HTTP to web service

  - by Serguei Fedorov

  I am bit frustrated at the lack of information about this online. Here is the issue: I am in charge of creating a iOS application which sends sound data back and forth between the server and the app. The Audio is in small files and thus does not need to be streamed over, but rather it can be sent. Right now, I am using a TCP server I wrote to handle applications like this. However, I want to keep the system as simple as possible and writing your own server and client sockets can get a bit complex and leaves room for crashes. Overall it slows down development because I need to account for packet structure and other things. My question is, can I write an ASPX or PHP web service that lets me pass the files back and forth through GET or POST?

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• My system can't be updated

  - by Lucio

  After I installed some updates I restarted my computer. Some days later I wanted to check for updates because the update-manager shows me the following: "The packet information has been updated last 24 days ago." and a window appeared. That window after downloading packages, said that: Failed to download the information from the repository Check your Internet connection Details: W:Failed to fetch gzip:/var/lib/apt/lists/partial/ar.archive.ubuntu.com_ubuntu_dists_oneiric_unive??rse_i18n_Translation-en Encountered a section with no Package: header , E:Some index files failed to download. They have been ignored, or old ones used instead. But my Internet connection works fine. I downloaded and installed and run the banish404 software and it does not work. Also I tried with an terminal with 'sudo apt-get update'. What do I have to do?

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• How to fix slow wireless with Intel 4965 AGN? [closed]

  - by mikewhatever

  Possible Duplicate: Slow wireless with an Intel 4965 We run Ubuntu 12.04, 32bit, with the current kernel 3.2.27-generic on an MSI EX700. I've already added the 11n_disable=1 tweek, without whcih, wireless has been unusable. Now, it works OK, but speedtest shows: Windows XP - down 11.68mbps, up 2.07mbps Ubuntu 12.04 - down 2.06mbps up 2.0mbps We've disabled ipv6, tried static and dinamic IPs, tried both swcrypto=0 and swcrypto=1 options, none of whcih made any difference. The problem may be the symptom of high packet loss. For example, here's the output of iwconfig after booting and testing the speeds: wlan0 IEEE 802.11abg ESSID:"amu" Mode:Managed Frequency:2.462 GHz Access Point: 00:78:9E:FA:32:C8 Bit Rate=54 Mb/s Tx-Power=15 dBm Retry long limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:off Link Quality=58/70 Signal level=-52 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:11 Invalid misc:3627 Missed beacon:0 I've posted a help request before with lots of technical info and outputs.

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• Ubuntu won't wake after pm-suspend

  - by Matus

  i have ubuntu 12.04 on my Zotac AD-02. Problem is when i run pm-suspend. zotac goes to sleep (it shows red led, and green light is flashing) but when i send magic packet to WOL it hangs ... it stops flashing and LED is green as its turned on but SSH wont run and it won't react to mouse or anything. I've read that sometimes it has something to do with graphics. It is mainly for DLNA and PLEX so i don't use any graphic component so if there is the problem tell me how to disable it :) is there some log or anything i can post? im fairly good at bash but not at all in ubuntu or debian. so i can't find any log. Thanks EDIT: here is lscpi if it helps

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• Syncing properties across a game server

  - by Vaughan Hilts

  I'm beginning to implement a simple scripting system into my networked server, and I've hit a snag. Before, I've been wrapping my calls into functions on objects that manipulate objects, but lately I've been finding this to be a pain for simple things. For example, if I set 'player.HP = 1'.. this works server-side. But the player side never sees this change unless I explicitly send a packet to inform the client. For many things like map swapping that require more complicated changes, like change X, Y, Map and do this.. I have a function. That's fine. But what about these small properties I want to sync?

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• Exiting a reboot loop

  - by user12617035

  If you're in a situation where the system is panic'ing during boot, you can use # boot net -s to regain control of your system. In my case, I'd added some diagnostic code to a (PCI) driver (that is used to boot the root filesystem). There was a bug in the driver, and each time during boot, the bug occurred, and so caused the system to panic: ... 000000000180b950 genunix:vfs_mountroot+60 (800, 200, 0, 185d400, 1883000, 18aec00) %l0-3: 0000000000001770 0000000000000640 0000000001814000 00000000000008fc %l4-7: 0000000001833c00 00000000018b1000 0000000000000600 0000000000000200 000000000180ba10 genunix:main+98 (18141a0, 1013800, 18362c0, 18ab800, 180e000, 1814000) %l0-3: 0000000070002000 0000000000000001 000000000180c000 000000000180e000 %l4-7: 0000000000000001 0000000001074800 0000000000000060 0000000000000000 skipping system dump - no dump device configured rebooting... If you're logged in via the console, you can send a BREAK sequence in order to gain control of the firmware's (OBP's) prompt. Enter Ctrl-Shift-[ in order to get the TELNET prompt. Once telnet has control, enter this: telnet> send brk You'll be presented with OBP's prompt: ok You then enter the following in order to boot into single-user mode via the network: ok boot net -s Note that booting from the network under Solaris will implicitly cause the system to be INSTALLED with whatever software had last been configured to be installed. However, we are using boot net -s as a "handle" with which to get at the Solaris prompt. Once at that prompt, we can perform actions as root that will let us back out our buggy driver (ok... MY buggy driver :-)) ...and replace it with the original, non-buggy driver. Entering the boot command caused the following output, as well as left us at the Solaris prompt (in single-user-mode): Sun Blade 1500, No Keyboard Copyright 1998-2004 Sun Microsystems, Inc. All rights reserved. OpenBoot 4.16.4, 1024 MB memory installed, Serial #53463393. Ethernet address 0:3:ba:2f:c9:61, Host ID: 832fc961. Rebooting with command: boot net -s Boot device: /pci@1f,700000/network@2 File and args: -s 1000 Mbps FDX Link up Timeout waiting for ARP/RARP packet Timeout waiting for ARP/RARP packet 4000 1000 Mbps FDX Link up Requesting Internet address for 0:3:ba:2f:c9:61 SunOS Release 5.10 Version Generic_118833-17 64-bit Copyright 1983-2005 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Booting to milestone "milestone/single-user:default". Configuring devices. Using RPC Bootparams for network configuration information. Attempting to configure interface bge0... Configured interface bge0 Requesting System Maintenance Mode SINGLE USER MODE # Our goal is to now move to the directory containing the buggy driver and replace it with the original driver (that we had saved away before ever loading our buggy driver! :-) However, since we booted from the network, the root filesystem ("/") is NOT mounted on one of our local disks. It is mounted on an NFS filesystem exported by our install server. To verify this, enter the following command: # mount | head -1 / on my-server:/export/install/media/s10u2/solarisdvd.s10s_u2dvd/latest/Solaris_10/Tools/Boot remote/read/write/setuid/devices/dev=4ac0001 on Wed Dec 31 16:00:00 1969 As a result, we have to create a temporary mount point and then mount the local disk onto that mount point: # mkdir /tmp/mnt # mount /dev/dsk/c0t0d0s0 /tmp/mnt Note that your system will not necessarily have had its root filesystem on "c0t0d0s0". This is something that you should also have recorded before you ever loaded your.. er... "my" buggy driver! :-) One can find the local disk mounted under the root filesystem by entering: # df -k / Filesystem kbytes used avail capacity Mounted on /dev/dsk/c0t0d0s0 76703839 4035535 71901266 6% / To continue with our example, we can now move to the directory of buggy-driver in order to replace it with the original driver. Note that /tmp/mnt is prefixed to the path of where we'd "normally" find the driver: # cd /tmp/mnt/platform/sun4u/kernel/drv/sparcv9 # ls -l pci\* -rw-r--r-- 1 root root 288504 Dec 6 15:38 pcisch -rw-r--r-- 1 root root 288504 Dec 6 15:38 pcisch.aar -rwxr-xr-x 1 root sys 211616 Jun 8 2006 pcisch.orig # cp -p pcisch.orig pcisch We can now synchronize any in-memory filesystem data structures with those on disk... and then reboot. The system will then boot correctly... as expected: # sync;sync # reboot syncing file systems... done Sun Blade 1500, No Keyboard Copyright 1998-2004 Sun Microsystems, Inc. All rights reserved. OpenBoot 4.16.4, 1024 MB memory installed, Serial #xxxxxxxx. Ethernet address 0:3:ba:2f:c9:61, Host ID: yyyyyyyy. Rebooting with command: boot Boot device: /pci@1e,600000/ide@d/disk@0,0:a File and args: SunOS Release 5.10 Version Generic_118833-17 64-bit Copyright 1983-2005 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Hostname: my-host NIS domain name is my-campus.Central.Sun.COM my-host console login: ...so that's how it's done! Of course, the easier way is to never write a buggy-driver... but.. then.. we all "have an eraser on the end of each of our pencils"... don't we ? :-) "...thank you... and good night..."

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• Using two ethernet connections (Internet enabled) simultaneously

  - by vedarthk

  I have searched and read over the Internet and also on askubuntu. i am using Ubuntu 11.04 and my question or the thing that I want to achieve is efficient use of both the connections and thus increasing my browsing and downloading speed. I want my system to decide which packet should be routed over which interface. I want to know if this is possible. For example, Is it possible to route alternate packets over the two interfaces ? Please let me know any Internet resource or If I would have to insert any code into the network drivers etc. ?

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• Unable to execute binary file. Exec format error

  - by user2689020

  I recently heard about Breach, a Node.js based browser. I was following the instructions on http://codeforgeek.com/2014/08/download-install-breach-browser-ubuntu-14-04/ to install it but got the following error : breach-v0.3.22-alpha.6-linux-x64/__AUTO_UPDATE_BUNDLE__/exo_browser/exo_browser: cannot execute binary file: Exec format error After some googling, I found that it is because I am trying to install the 64 bit package on the 32 bit Ubuntu installation. I tried to find 32 bit package of the same but ended up with no luck. The browser is only available in 64 bit packet(as far as i know). So, My question is : Is it possible to somehow install it on the 32 bit OS or if any program available which can run 64 bit applications on the 32 bit OS. I have been googling around and found no help. Can anyone help me? I am using Ubuntu 14.04 (32 Bit). Thank You

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