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• Ubuntu 13.10 on Acer V5-472 with HD 4000

  - by Hyperboreus

  I have an Acer V5-472 with intel HD4000 graphics chipset and a built-in 1366*768 display. I have installed ubuntu 13.10 amd64 in legacy boot mode with an external monitor. Installation showed no problems, I can boot from HDD and log into my system. The internal display doesn't work and I have to use an external monitor. I have tried the following (found in other threads) to no avail: Setting grub option "acpi_backlight=vendor" or "acpi_osi=Linux" or both. Installing the intel HD drivers for Linux from their homepage. Running in circles, screaming and shouting. The internal display lights up (I can change the brightness with Fn-Left and Fn-Right) but that's all. When I boot, I get a purple splash screen and from then only the external monitor works. I read somewhere that this might be a problem with kernel 3.11? Has anybody ubuntu running on an Acer V5-472? Should I change ubuntu version or use 32-bit instead? In general, how can I get the internal display to work? Edit: The settings-display dialogue shows the internal display correctly with supported resolution of 1366.

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• exim4 to relay emails

  - by Matthieu

  I have exim4 installed on a Linux box. The basics work fine and I can send email from that machine without any problem to whatever email address. I also have a printer/scanner which is capable to send scans as emails. It needs an SMTP gateway to be able to do that. So I give the IP address of that Linux box, changed the configuration a little bit but still cannot get it to work. After I run dpkg-reconfigure exim4-config, here is what I get in /etc/exim4/update-exim4.conf.conf : dc_eximconfig_configtype='internet' dc_other_hostnames='' dc_local_interfaces='127.0.0.1;192.168.2.2' dc_readhost='' dc_relay_domains='mycompanyemail.com' dc_minimaldns='false' dc_relay_nets='192.168.2.0/24' dc_smarthost='' CFILEMODE='644' dc_use_split_config='false' dc_hide_mailname='' dc_mailname_in_oh='true' dc_localdelivery='mail_spool' My problem is that with this configuration, I can only send to emails @mycompanyemail.com... It says I can use wildcard, but when I do that, the '*' is replaced by whatever filename is in the directory where I run all that. How can I configure it to be able to send emails with any domain ? Or am I doing it wrong ? EDIT : here is the part of the log that's causing trouble : 2011-08-03 16:28:18 H=(NPI2D389C) [192.168.2.20] F=<[email protected]> rejected RCPT <[email protected]>: relay not permitted The first part ([email protected]) does not matter. I changed the email address. The point is that if this email is @mycompanyemail.com then everything works fine. Anything else does not work. I could add gmail.com, but I am looking to have any domain working...

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• mpirun -np N, what if N is larger than my core number?

  - by Daniel

  Say I have a 4-core workstation, what would linux (Ubuntu) do if I execute mpirun -np 9 XXX Q1. Will 9 run immediately together, or they will run 4 after 4? Q2. I suppose that using 9 is not good, because the remainder 1, it will make the computer confused, (I don't know is it going to be confused at all, or the "head" of the computer will decide which core among the 4 cores will be used?) Or it will be randomly picked. Who decide which one core to call? Q3. If I feel my cpu is not bad and my ram is okay and large enough, and my case is not very big. Is it a good idea in order to fully use my cpu and ram, that I do mpirun -np 8 XXX, or even mpirun -np 12 XXX. Q4. Who decides all of these effciency optimization, Ubuntu, or linux, or motherboard or cpu? Your enlightenment would be really appreciated.

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• "Unable to initialize module" fileinfo php-pecl-Fileinfo.x86_64

  - by Myers Network

  I have a brand new server server that I am trying to get setup up. This is a 64 bit machine that I can not install "fileinfo" or "memcache". I have uninstalled these and reinstalled them using yum and pecl with no luck. Yum install fine "no error" but then get error when running php. pecl from what I can tell is only installing 32bit. Does not put anything in the lib64 directory. Here is my output from php -v: PHP Warning: PHP Startup: fileinfo: Unable to initialize module Module compiled with module API=20050922, debug=0, thread-safety=0 PHP compiled with module API=20060613, debug=0, thread-safety=0 These options need to match in Unknown on line 0 PHP Warning: PHP Startup: memcache: Unable to initialize module Module compiled with module API=20050922, debug=0, thread-safety=0 PHP compiled with module API=20060613, debug=0, thread-safety=0 These options need to match in Unknown on line 0 PHP 5.2.14 (cli) (built: Aug 12 2010 16:03:48) Copyright (c) 1997-2010 The PHP Group Zend Engine v2.2.0, Copyright (c) 1998-2010 Zend Technologies Here is some other system info incase you need it uname: Linux server.actham.us 2.6.18-194.26.1.el5 #1 SMP Tue Nov 9 12:54:20 EST 2010 x86_64 x86_64 x86_64 GNU/Linux php -m: PHP Warning: PHP Startup: fileinfo: Unable to initialize module Module compiled with module API=20050922, debug=0, thread-safety=0 PHP compiled with module API=20060613, debug=0, thread-safety=0 These options need to match in Unknown on line 0 PHP Warning: PHP Startup: memcache: Unable to initialize module Module compiled with module API=20050922, debug=0, thread-safety=0 PHP compiled with module API=20060613, debug=0, thread-safety=0 These options need to match in Unknown on line 0 [PHP Modules] bz2 calendar ctype curl date dbase dom exif filter ftp gd gettext gmp hash iconv imap json ldap libxml mbstring mcrypt mysql mysqli openssl pcntl pcre PDO pdo_mysql pdo_sqlite readline Reflection session shmop SimpleXML sockets SPL standard tokenizer wddx xml xmlreader xmlrpc xmlwriter xsl zip zlib [Zend Modules] Any help would be greatly appreciated, thanks....

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• GlusterFS is failing to mount on boot

  - by J. Pablo Fernández

  I'm running the official GlusterFS 3.5 packages on Ubuntu 12.04 and everything seems to be working fine, except mounting the GlusterFS volumes at boot time. This is what I see in the log files: [2014-06-13 08:52:28.139382] I [glusterfsd.c:1959:main] 0-/usr/sbin/glusterfs: Started running /usr/sbin/glusterfs version 3.5.0 (/usr/sbin/glusterfs --volfile-server=koraga --volfile-id=/private_uploads /var/www/shared/private/uploads) [2014-06-13 08:52:28.147186] I [socket.c:3561:socket_init] 0-glusterfs: SSL support is NOT enabled [2014-06-13 08:52:28.147237] I [socket.c:3576:socket_init] 0-glusterfs: using system polling thread [2014-06-13 08:52:28.148183] E [socket.c:2161:socket_connect_finish] 0-glusterfs: connection to 176.58.113.205:24007 failed (Connection refused) [2014-06-13 08:52:28.148236] E [glusterfsd-mgmt.c:1601:mgmt_rpc_notify] 0-glusterfsd-mgmt: failed to connect with remote-host: koraga (No data available) [2014-06-13 08:52:28.148251] I [glusterfsd-mgmt.c:1607:mgmt_rpc_notify] 0-glusterfsd-mgmt: Exhausted all volfile servers [2014-06-13 08:52:28.148477] W [glusterfsd.c:1095:cleanup_and_exit] (-->/usr/lib/x86_64-linux-gnu/libgfrpc.so.0(rpc_transport_notify+0x27) [0x7fe077f8e0f7] (-->/usr/lib/x86_64-linux-gnu/libgfrpc.so.0(rpc_clnt_notify+0x1a4) [0x7fe077f91cc4] (-->/usr/sbin/glusterfs(+0xcada) [0x7fe078655ada]))) 0-: received signum (1), shutting down [2014-06-13 08:52:28.148513] I [fuse-bridge.c:5444:fini] 0-fuse: Unmounting '/var/www/shared/private/uploads'. My fstab contains: proc /proc proc defaults 0 0 /dev/xvda / ext4 noatime,errors=remount-ro 0 1 /dev/xvdb none swap sw 0 0 /dev/xvdc /var/lib/glusterfs/brick01 ext4 defaults 1 2 koraga:/private_uploads /var/www/shared/private/uploads glusterfs defaults,_netdev 0 0 Any ideas what's going on and/or how to fix it?

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• OpenVPN server throws an "access denied" error

  - by HackToHell

  OpenVPN refuses to start up and exists with this error ever since i upgraded Ubuntu from 1.04 to 11.10 Dec 14 19:12:38 oogle ovpn-server[32150]: OpenVPN 2.2.0 i686-linux-gnu [SSL] [LZO2] [EPOLL] [PKCS11] [eurephia] [MH] [PF_INET6] [IPv6 payload 20110424-2 (2.2RC2)] built on Jul 4 2011 Dec 14 19:12:38 oogle ovpn-server[32150]: NOTE: the current --script-security setting may allow this configuration to call user-defined scripts Dec 14 19:12:38 oogle ovpn-server[32150]: Note: cannot open openvpn-status.log for WRITE Dec 14 19:12:38 oogle ovpn-server[32150]: Note: cannot open ipp.txt for READ/WRITE Dec 14 19:12:38 oogle ovpn-server[32150]: Diffie-Hellman initialized with 1024 bit key Dec 14 19:12:38 oogle ovpn-server[32150]: Cannot load private key file server.key: error:0200100D:system library:fopen:Permission denied: error:20074002:BIO routines:FILE_CTRL:system lib: error:140B0002:SSL routines:SSL_CTX_use_PrivateKey_file:system lib Dec 14 19:12:38 oogle ovpn-server[32150]: Error: private key password verification failed Dec 14 19:12:38 oogle ovpn-server[32150]: Exiting Dec 14 19:12:46 oogle ovpn-server[32201]: OpenVPN 2.2.0 i686-linux-gnu [SSL] [LZO2] [EPOLL] [PKCS11] [eurephia] [MH] [PF_INET6] [IPv6 payload 20110424-2 (2.2RC2)] built on Jul 4 2011 Dec 14 19:12:46 oogle ovpn-server[32201]: NOTE: the current --script-security setting may allow this configuration to call user-defined scripts Dec 14 19:12:46 oogle ovpn-server[32201]: Note: cannot open openvpn-status.log for WRITE Dec 14 19:12:46 oogle ovpn-server[32201]: Note: cannot open ipp.txt for READ/WRITE Dec 14 19:12:46 oogle ovpn-server[32201]: Diffie-Hellman initialized with 1024 bit key Dec 14 19:12:46 oogle ovpn-server[32201]: Cannot load private key file server.key: error:0200100D:system library:fopen:Permission denied: error:20074002:BIO routines:FILE_CTRL:system lib: error:140B0002:SSL routines:SSL_CTX_use_PrivateKey_file:system lib Dec 14 19:12:46 oogle ovpn-server[32201]: Error: private key password verification failed Dec 14 19:12:46 oogle ovpn-server[32201]: Exiting

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• Looking for a short term solution to improve website performance with additional server

  - by Tanim Mirza

  I am working with a small team to run an internal website running with PHP 5.3.9, MySQL 5.0.77. All the files and database are hosted on a dedicated Linux machine with the following configuration: Intel Xeon E5450 8 CPU cores @3.00GHz, 2992.498 MHz, Cache 6148 KB, Cent OS – Red Hat Enterprise Linux Server release 5.4 We started small and then the database got bigger and now the website performance degraded significantly. We often get server space overrun, mysql overloaded with too many calls, etc. We don't have much experience dealing with these issues. We recently got another server that we were thinking to use to improve performance. Since it has better configuration, some of us wanted to completely move everything to the new machine. But I am trying to find out how we can utilize both machine for optimized performance. I found options such as MySQL clustering, Load balancer, etc. I was wondering if I could get any suggestion for this situation "How to utilize two machines in short term for best performance", that would be great. By short term we are looking for something that we can deploy in a month or so. Thanks in advance for your time.

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• Why can't I unblock postgres with shorewall?

  - by ryeguy

  I can't seem to unblock the port needed for postgres using Shorewall. I am developing a PHP app on my windows machine here, and then I upload it on my linux box to actually use it. The linux box runs the php files as well as hosts the db server. Since I need it working from both machines, in my PHP code I am referring to the database as the full IP instead of localhost. I can easily connect to postgres from my windows machine, but ironically, my PHP app can't connect to postgres even though it's on the same box. Here's what I have in /etc/shorewall/rules: #macro/action src dest PostgreSQL/ACCEPT net $FW PostgreSQL/ACCEPT loc $FW PostgreSQL/ACCEPT loc dmz PostgreSQL/ACCEPT net dmz PostgreSQL/ACCEPT loc net PostgreSQL/ACCEPT dmz $FW PostgreSQL/ACCEPT dmz loc PostgreSQL/ACCEPT dmz net PostgreSQL/ACCEPT dmz dmz Clearly I have a ton of crap there. The first line is all I needed to make it allow a connection from my windows machine. All the lines after it are me just trying everything to get it to work. What am I missing?

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• Rails 3 passenger nginx application spawner server error on Synology NAS

  - by peresleguine

  Question updated, please read UPD2. I'm trying to deploy app through passenger nginx module on DS710+ (ruby 1.9.2p0 installed). There is syntax error relative to has_and_belongs_to_many_association.rb file. Please look at the screenshot(deleted, question updated). I'm pretty sure the problem isn't in library file. App is running good via webrick. Could you please advise what to look for? UPD1 ruby -v ruby 1.9.2p0 (2010-08-18 revision 29036) [i686-linux] gem list -d passenger *** LOCAL GEMS *** passenger (3.0.6) Author: Phusion - http://www.phusion.nl/ Rubyforge: http://rubyforge.org/projects/passenger Homepage: http://www.modrails.com/ Installed at: /usr/lib/ruby/gems/1.9.1 Easy and robust Ruby web application deployment UPD2 I've decided to reinstall everything. It solved previous problem but caused another one. The error is: The application spawner server exited unexpectedly: Unexpected end-of-file detected. Here is screenshot. New output: ruby -v ruby 1.9.2p180 (2011-02-18 revision 30909) [x86_64-linux] gem list -d passenger *** LOCAL GEMS *** passenger (3.0.7) Author: Phusion - http://www.phusion.nl/ Rubyforge: http://rubyforge.org/projects/passenger Homepage: http://www.modrails.com/ Installed at: /usr/lib/ruby/gems/1.9.1 Nginx error.log: [ pid=5653 thr=32771 file=ext/common/Watchdog.cpp:128 time=2011-04-20 14:08:34.505 ]: waitpid() on Phusion Passenger helper agent return -1 with errno = ECHILD, falling back to kill polling [ pid=5654 thr=49156 file=ext/common/Watchdog.cpp:128 time=2011-04-20 14:08:34.506 ]: waitpid() on Phusion Passenger logging agent return -1 with errno = ECHILD, falling back to kill polling 2011/04/20 14:12:33 [notice] 7614#0: signal process started

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• Pinging an external server through OpenVPN tunnel doesn’t work

  - by qdii

  I have an OpenVPN server and a client, and I want to use this tunnel to access not only 10.0.8.0/24 but the whole internet. So far, pinging the server from the client through the tun0 interface works, and vice versa. However, pinging www.google.com from the client through tun0 doesn’t work (all packets are lost). I figured that I should configure the server so that any packet coming from tun0 in destination of the internet be forwarded, so I came up with this iptables config line: interface_connecting_to_the_internet='eth0' interface_openvpn='tun0' internet_ip_address=`ifconfig "$interface_connecting_to_the_internet" | sed -n s'/.*inet \([0-9.]*\).*/\1/p'` iptables -t nat -A POSTROUTING -o "${interface_connecting_to_the_internet}" -j SNAT --to-source "${internet_ip_address}" echo '1' > /proc/sys/net/ipv4/ip_forward Yet, this doesn’t work, the packets are still lost and I am wondering what could possibly be wrong with my setup. Some details: ip route gives on the server: default via 176.31.127.254 dev eth0 metric 3 10.8.0.0/24 via 10.8.0.2 dev tun0 10.8.0.2 dev tun0 proto kernel scope link src 10.8.0.1 127.0.0.0/8 via 127.0.0.1 dev lo 176.31.127.0/24 dev eth0 proto kernel scope link src 176.31.127.109 ip route gives on the client: default via 192.168.1.1 dev wlan0 proto static 10.8.0.1 via 10.8.0.5 dev tun0 10.8.0.5 dev tun0 proto kernel scope link src 10.8.0.6 127.0.0.0/8 via 127.0.0.1 dev lo scope link 192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.109 client uses wifi adapter wlan0 and TUN adapter tun0. server uses ethernet adapter eth0 and TUN adapter tun0. the VPN spans on 10.0.8.0/24 both client and linux are using Linux 3.6.1.

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• Ubuntu-VirtualBox-LikeWiseOpen network disaster

  - by Sergio

  I've a virtual machine on VirtualBox 4.1.4 with Ubuntu 11.04. It was working perfectly, but after a reboot something really wrong happened: I wasn't able to connect to the internal network (same for NAT). $ sudo dhclient -v Internet Systems Consortium DHCP Client 4.1.1-P1 Copyright 2004-2010 Internet System Consortium. All rights reserved. For info, please visit https://www.isc.org/software/dhcp/ Error creating socket to list interfaces; Permission denied Can't get list of interfaces. The network interface is PCnet-FAST III. Additional information: $ uname -a Linux LinuxFileServer 2.6.38-8-generic #42-Ubuntu SMP Mon Apr 11 03:31:50 UTC 2011 i686 i686 i386 GNU/Linux Any ideas? Thanks EDIT: $ sudo ifconfig -a eth1 Link encap:Ethernet HWaddr 08:00:27:af:f2:c7 indirizzo inet6: fe80::a00:27ff:feaf:f2c7/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:16 errors:0 dropped:0 overruns:0 carrier:0 collisioni:0 txqueuelen:1000 Byte RX:0 (0 B) Byte TX:3870 (3.8 KB) Interrupt:10 lo Link encap:Loopback locale indirizzo inet:127.0.0.1 Maschera:255.0.0.0 indirizzo inet6: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:16 errors:0 dropped:0 overruns:0 frame:0 TX packets:16 errors:0 dropped:0 overruns:0 carrier:0 collisioni:0 txqueuelen:0 Byte RX:960 (960.0 B) Byte TX:960 (960.0 B)

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• How can I enable PHP5 for a site? Having problems with every single method.

  - by John Stephens

  I'm working on a client site that is hosted on someone's DIY Debian Linux server [Apache/1.3.33 (Debian GNU/Linux)], and I'm trying to install a script that requires PHP5. By default, the server parses .php files with PHP 4.3.10-22, which is configured at /etc/php4/apache/php.ini, according to phpinfo(). On the server I can see a config directory for PHP5 adjacent to the PHP4 directory: /etc/php5.0/apache2/php.ini. I have tried multiple methods to enable PHP5 for the document root where the site's files are hosted, including all available methods mentioned here. By far, the most common suggestion I've found is to add one or both of the following lines to the site's .htaccess file: AddHandler application/x-httpd-php5 .php AddType application/x-httpd-php5 .php Trouble is, when either or both of those lines are present, the site forces my browser to download any .php files requested, without parsing the PHP at all. All of the other methods mentioned in the above article cause a 500 Internal Server Error. There is no hosting control panel I can access in a browser to enable PHP5 for the site, but I do have shell access. When I asked the server administrator about this issue, he encouraged me to search for the answer on Google. Where could I begin to troubleshoot this issue? Are there ways to test or verify the server's specific PHP5 installation and configuration, using the command line or some other method? Do you have other suggestions to enable PHP5?

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• Does the mysql Client API Library version have to match the installed MySQL/Percona server version?

  - by William Jamieson

  I'm running Scientific Linux 6.3 (binary compaible with Redhat/CentOS/etc..) as a LAMP stack. I've installed Percona server and client v5.5 from the Percona yum repository. However when I run phpinfo() I notice that under the MySQL and mysqli sections, it lists the Client API Library version as 5.1.66, and not 5.5x. I'm guessing these need to match, at least to major versions, and I have no idea what the possible consequences of such a mismatch could be. Do I need to revert to Percona server and client v5.1? This is for a production environment so it needs to be right. I'd appreciate any input or experience people could offer. I'm running Scientific Linux 6.3 (binary compaible with Redhat/CentOS/etc..) as a LAMP stack. I've installed Percona server and client v5.5 from the Percona yum repository. However when I run phpinfo() I notice that under the MySQL and mysqli sections, it lists the Client API Library version as 5.1.66, and not 5.5x. I'm guessing these need to match, at least to major versions, and I have no idea what the possible consequences of such a mismatch could be. Do I need to revert to Percona server and client v5.1? This is for a production environment so it needs to be right. I'd appreciate any input or experience people could offer. (Note I will also be cross posting this on the Percona forums)

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• compile kernel 2.6.34 for Ubuntu Lucid for xen dom0 / pvops

  - by andreash

  Hi there, I'd like to compile a recent Linux kernel (2.6.34) for my Ubuntu 10.04 Lucid Lynx AMD64 box, mainly because I'd like to use it as a dom0 kernel with the recent xen4. There's plenty documentation on the web about how to compile a kernel 'Debian style'. But what I think would be nice to start with an 'official' Ubuntu config to be sure not to miss any important things and having to recompile over and over again. So what I'd like to do is compile 2.6.34, but starting with the 'official' /boot/config-2.6.32-XX from Ubuntu Lucid. The question is: How do I best do that? If I just take the config from 2.6.32, the new features from 2.6.33/34 won't be in the config. So what I'd like to do is somehow the 2.6.34 config with the original 2.6.32 one from Ubuntu. How can I best do that? Does it even make sense? Is there easier ways to achieve what I want? Thanks for your insight! A. PS: I just found a linux-image-2.6.32-bpo.4-xen-amd64 package on backports.org, but no information about it. Would it work as a dom0 kernel on Lucid?

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• Software to clean up photos of whiteboards and documents?

  - by Norman Ramsey

  I take a lot of photos of whiteboards, blackboards, and so on for teaching purposes (examples online through May 2010). I'm interested in cleaning them up for archival purposes, preferably using Linux. Commercial products ClearBoard and PhotoNote are priced a little aggressively for my purposes, plus my students would like to have this capability too. Does anyone know of any good, open source software for Converting photographs to images with just a few colors? Eliminating perspective distortion? Removing unwanted junk from around the edges of an image? or anything like that? I'm imagining that I start out with a picture of my whiteboard using red and black markers, and I end up with a three-color image using just white, red, and black. Or I photograph a laser-printed document and end up with a clean black-and-white image. I have tried standard tools that reduce the number of colors in an image, and they do a terrible job—probably because they are trying to reproduce the uneven illumination of the original image. Command-line Linux tools would be ideal.

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• OpenVPN connected but not internet access on the client

  - by Stefan

  I've setup OpenVPN following this tutorial, and everything works fine except that I don't have an internet connection on the client while connected to VPN. http://www.howtoforge.com/internet-and-lan-over-vpn-using-openvpn-linux-server-windows-linux-clients-works-for-gaming-and-through-firewalls My VPS server config is as follows (Ubuntu): dev tun proto udp port 1194 ca /etc/openvpn/easy-rsa/keys/ca.crt cert /etc/openvpn/easy-rsa/keys/server.crt key /etc/openvpn/easy-rsa/keys/server.key dh /etc/openvpn/easy-rsa/keys/dh1024.pem user nobody group nogroup server 10.8.0.0 255.255.255.0 persist-key persist-tun status /var/log/openvpn-status.log verb 3 client-to-client push "redirect-gateway local def1" #set the dns servers push "dhcp-option DNS 8.8.8.8" push "dhcp-option DNS 8.8.4.4" log-append /var/log/openvpn comp-lzo plugin /usr/lib/openvpn/openvpn-auth-pam.so common-auth My client config is as follows (Windows 7): dev tun client proto udp remote XXX.XXX.XXX.XXX 1194 resolv-retry infinite nobind persist-key persist-tun ca ca.crt cert stefan.crt key stefan.key comp-lzo verb 3 auth-user-pass redirect-gateway local def1 I've turned off the firewall on the server for testing purposes (it doesn't help), and tried both wired and wireless connecting on the client. I've tried many Google results... but nothing seems to help. Can you help me? Thanks so far...

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• how to correctly mount fat32 partition in Ubuntu in order to preserve case

  - by Dean

  I've found there are couple of problems might be related how my FAT32 partition was mounted. I hope you can help me to solve the problem. I also included the command I used to help others when they find this post, sorry to those might feel I should use less space. I've the following file structures on my disk dean@notebook:~$ sudo fdisk -l Disk /dev/sda: 160.0 GB, 160041885696 bytes 255 heads, 63 sectors/track, 19457 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x08860886 Device Boot Start End Blocks Id System /dev/sda1 * 1 13 102400 7 HPFS/NTFS Partition 1 does not end on cylinder boundary. /dev/sda2 13 5737 45978624 7 HPFS/NTFS /dev/sda3 5738 10600 39062047+ 83 Linux /dev/sda4 10601 19457 71143852+ 5 Extended /dev/sda5 10601 11208 4883728+ 82 Linux swap / Solaris /dev/sda6 11209 15033 30720000 b W95 FAT32 /dev/sda7 15033 19457 35537920 7 HPFS/NTFS In the etc/fstab I've got UUID=91c57a65-dc53-476b-b219-28dac3682d31 / ext4 defaults 0 1 UUID=BEA2A8AFA2A86D99 /media/NTFS ntfs-3g quiet,defaults,locale=en_US.utf8,umask=0 0 0 UUID=0C0C-9BB3 /media/FAT32 vfat user,auto,utf8,fmask=0111,dmask=0000,uid=1000 0 0 /dev/sda5 swap swap sw 0 0 /dev/sda1 /media/sda1 ntfs nls=iso8859-1,ro,noauto,umask=000 0 0 /dev/sda2 /media/sda2 ntfs nls=iso8859-1,ro,noauto,umask=000 0 0 I checked my id using id and I've got dean@notebook:~$ id uid=1000(dean) gid=1000(dean) groups=4(adm),20(dialout),24(cdrom),46(plugdev),103(fuse),104(lpadmin),115(admin),120(sambashare),1000(dean) I don't know why with these settings I still have problem of using svn like in this one Thank you for your help!

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• Help setting up a secondary authoritative DNS server.

  - by GLB03

  We have three Authoritative DNS servers and three recursive/caching DNS servers on my campus. Authoritative servers DNS1- Windows 2003 DNS2- Old Red Hat ----- Replacing w/ newer version DNS3- Windows 2008 (I installed) Caching and Recursive resolvers servers Server1- Windows 2003 Server2- CentOS 5.2 (I installed) Server3- CentOS 5.3 (I installed) I am replacing DNS2 with a newer Red Hat version, but have no documentation on how it was implemented. I have setup caching and windows authoritative servers, but not a linux secondary authoritative server. I have a perl script from the original server that pulls data from our DNS1 server. We use DJBDNS and TinyDNS on our linux servers. Our Network Engineer says the DNS2 server I am replacing is an authoritative server that doesn't need to be caching, but the only instructions I see is for an Authoritative server that does caching as well. Can someone point me in the right directions. I thought I was on the right track with using these instructions but when I query my new dns server I get "No response from server", I have temporarily disabled iptables to eliminate it from being an issue. ps -aux | grep dns avahi 3493 0.0 0.2 2600 1272 ? Ss Apr24 0:05 avahi-daemon: running [newdns2.local] root 5254 0.0 0.1 3920 680 pts/0 R+ 09:56 0:00 grep dns root 6451 0.0 0.0 1528 308 ? S Apr29 0:00 supervise tinydns dnslog 6454 0.0 0.0 1540 308 ? S Apr29 0:00 multilog t ./main tinydns 9269 0.0 0.0 1652 308 ? S Apr29 0:00 /usr/local/bin/tinydns

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• How to set up multiple DNS servers on an intranet

  - by Brent

  We have an Active Directory network, with a mixture of Windows DNS, linux BIND servers, and want to use OpenDNS as our external DNS provider. I am wondering What is the best way to set up these servers (regarding forwarders, recursion, etc.)? Active Directory is our main internal DNS for our domain, and has 3 redundant servers. DHCP and all our servers use these as their DNS servers. Then we have a legacy AD server from an old network that is still authoritative for a bunch of domains. Finally, we have a couple of Linux Bind servers that are authoritative for a bunch of websites we host. Should our main AD servers point to our legacy AD server, which points to one of our BIND servers, which points to the other BIND server, which finally points out to openDNS? Or should our main AD servers point to all of these directly? - or is there a better option? What happens if a domain is listed in 2 places? Does DNS process the forwarders in order? What about root servers - if I want to use OpenDNS for "everything else", do I just list them as the last forwarders, and delete the root servers from all my DNS servers? How does recursion work - in this scenario, should I be using recursion or not?

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• Windows - Website unaccessible only on windows pcs in LAN

  - by DorentuZ

  For serveral days now, a website isn't accessible on a single pc in the LAN. On the other pc's, it works just fine. And it's just a single website that's not accessible as far as I know of. The website generates a timeout on every single web browser I've tried (IE8, Firefox and Chrome). However, traceroute, nmap and telnet all work just fine. I've even tried multiple user accounts and safe mode, but that didn't work either. As a side note: using a linux live cd did work and I could access the website without any problems. The hosts file is the windows default, the ip- and dns settings on the network adapter normal as well. No strange processes are running and no viruses found. According to tcpview and netstat there are connections to the domain, but every request in the browser results in a timeout.. Any idea what's happening? Update: All of the computers on the network running Windows (any version) are showing this problem now. The website is still working under linux and mac osx. So, it has to be related to some kind of windows update (although I haven't installed any on one computer in the past week, which I've set to do manual updates only)..

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• Avoiding DNS timeouts when a dns server fails

  - by Neil Katin

  We have a small datacenter with about a hundred hosts pointing to 3 internal dns servers (bind 9). Our problem comes when one of the internal dns servers becomes unavailable. At that point all the clients that point to that server start performing very slowly. The problem seems to be that the stock linux resolver doesn't really have the concept of "failing over" to a different dns server. You can adjust the timeout and number of retries it uses, (and set rotate so it will work through the list), but no matter what settings one uses our services perform much more slowly if a primary dns server becomes unavailable. At the moment this is one of the largest sources of service disruptions for us. My ideal answer would be something like "RTFM: tweak /etc/resolv.conf like this...", but if that's an option I haven't seen it. I was wondering how other folks handled this issue? I can see 3 possible types of solutions: Use linux-ha/Pacemaker and failover ips (so the dns IP VIPs are "always" available). Alas, we don't have a good fencing infrastructure, and without fencing pacemaker doesn't work very well (in my experience Pacemaker lowers availability without fencing). Run a local dns server on each node, and have resolv.conf point to localhost. This would work, but it would give us a lot more services to monitor and manage. Run a local cache on each node. Folks seem to consider nscd "broken", but dnrd seems to have the right feature set: it marks dns servers as up or down, and won't use 'down' dns servers. Any-casting seems to work only at the ip routing level, and depends on route updates for server failure. Multi-casting seemed like it would be a perfect answer, but bind does not support broadcasting or multi-casting, and the docs I could find seem to suggest that multicast dns is more aimed at service discovery and auto-configuration rather than regular dns resolving. Am I missing an obvious solution?

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• Is this a File Header / Magic Number?

  - by Hammer Bro.

  I've got 120,000 files (way more, actually; this is just an arbitrary subset) of an unknown type. Linux file does not identify them (not that they're necessarily Linux files), nor do any other methods I've tried. There are only two hints about them that I currently have. One is that I suspect some compression is employed -- I have metadata that claims the file sizes are always some amount larger than what I observe. The other is that in 100,000 of these files, the first 16 bytes are always: ff ee ee dd 00 00 00 00 01 00 00 00 00 00 00 00 That really looks like a file header/magic number to me, but I just can't place it. Does anyone know what kind of files this would indicate? Alternatively, can anyone convince me that these suspiciously common bytes certainly do not indicate a specific file type? UPDATE I don't know the exact reverse-engineering details, but most of the files in our case are zips after the first 29(? or so) bytes are ignored. So in practice the problem is solved (we know how to process the files) but in theory the question is still unanswered -- I don't know which application routinely prepends about 29 bytes to its zips. [I'm not sure if I should leave the question open or not at this point.]

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• Which ports are needed for NTLM (Windows Authentication) to connect to SQL Server?

  - by Adam Bellaire

  I've got SQL server running on a machine which is not in a domain, and which is not operating in mixed mode (it's running with "Windows Authentication"). I'm trying to connect to it from a Linux web server running freetds via TCP/IP, using NTLM to authenticate. The firewall on the SQL server is very restrictive. 1433 is open to my web server, but I'm getting conflicting information from the web on what additional ports (TCP/UDP) are needed for NTLM to succeed. It is currently fail; I can talk on 1433 to request NTLM, but the actual authentication always fails. One source says 137, 138, 139, but those are just the NetBIOS ports. Do I really need those? Another source says 135. Still others seem to say 1434... I can't make heads or tails of it. Dammit Jim, I'm a programmer, not a network administrator! EDIT: The exact error message: Msg 18452, Level 14, State 1, Server , Line 0 Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection. Msg 20002, Level 9, State -1, Server OpenClient, Line -1 Adaptive Server connection failed I am attempting to connect with a remote machine username, i.e. 'servername\username'. Some sources recommend that I set up mirrored accounts on the local and remote machines, but the local machine is running Linux, not IIS under Windows.

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• Can't install PHP after apt-get dist-upgrade

  - by WASD42

  I had a server with perfectly running for months classical LAMP installation on Ubuntu 8.04: Linux localhost 2.6.24-23-generic #1 SMP Wed Apr 1 21:47:28 UTC 2009 i686 GNU/Linux DISTRIB_ID=Ubuntu DISTRIB_RELEASE=8.04 DISTRIB_CODENAME=hardy DISTRIB_DESCRIPTION="Ubuntu 8.04.4 LTS" Don't know why I've started apt-get update, apt-get upgrade but everything ended with apt-get dist-upgrade :) Everything gone alright... But now I can't start nor Apache, nor PHP, because PHP was simply deleted. When I'm trying to install it: > apt-get install php5 <...> The following packages have unmet dependencies: php5: Depends: libapache2-mod-php5 (>= 5.2.4-2ubuntu5.17) but it is not going to be installed or php5-cgi (>= 5.2.4-2ubuntu5.17) but it is not going to be installed E: Broken packages When I'm trying to install libapache2-mod-php5: The following packages have unmet dependencies: libapache2-mod-php5: Depends: php5-common (= 5.2.4-2ubuntu5.17) but 5.3.6-6~dotdeb.1 is to be installed E: Broken packages I don't know what 5.3.6-6~dotdeb.1 is and where is this package, because I've already removed dotdeb repository from APT sources :/ Tried to do apt-get update, apt-get upgrade, apt-get install php5 php5-common php5-cli with no success... Don't know what to try next :(

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• IPSec for LAN traffic: Basic considerations?

  - by chris_l

  This is a follow-up to my Encrypting absolutely everything... question. Important: This is not about the more usual IPSec setup, where you want to encrypt traffic between two LANs. My basic goal is to encrypt all traffic within a small company's LAN. One solution could be IPSec. I have just started to learn about IPSec, and before I decide on using it and dive in more deeply, I'd like to get an overview of how this could look like. Is there good cross-platform support? It must work on Linux, MacOS X and Windows clients, Linux servers, and it shouldn't require expensive network hardware. Can I enable IPSec for an entire machine (so there can be no other traffic incoming/outgoing), or for a network interface, or is it determined by firewall settings for individual ports/...? Can I easily ban non-IPSec IP packets? And also "Mallory's evil" IPSec traffic that is signed by some key, but not ours? My ideal conception is to make it impossible to have any such IP traffic on the LAN. For LAN-internal traffic: I would choose "ESP with authentication (no AH)", AES-256, in "Transport mode". Is this a reasonable decision? For LAN-Internet traffic: How would it work with the internet gateway? Would I use "Tunnel mode" to create an IPSec tunnel from each machine to the gateway? Or could I also use "Transport mode" to the gateway? The reason I ask is, that the gateway would have to be able to decrypt packages coming from the LAN, so it will need the keys to do that. Is that possible, if the destination address isn't the gateway's address? Or would I have to use a proxy in this case? Is there anything else I should consider? I really just need a quick overview of these things, not very detailed instructions.

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