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• EMC VNX iSCSI setup - unsure about SP/port assignment

  - by pauska

  We have a new VNX5300 waiting to get configured, and I need to plan out the network infrastructure before the EMC tech arrives. It has 4x1gbit iSCSI per SP (8 ports in total), and I'd like to get the most out of the performance until we jump over to 10gig iSCSI. From what I can read from the docs - the recommendation is to use only two ports per SP, with 1 active and 1 passive. Why is this? It seems kind of pointless to have quad-port i/o-modules and then recommend to not use more than two of them? Also - I'm a bit unsure about the zoning. The best practices guide state that you should separate each port on each SP from each other on different logical networks. Does this mean that I have to create 4 logical networks to be able to use all 8 ports? It also gives the following example: Does this mean that A0 and B0 should sit on the same physical switch aswell? Won't this make all traffic go on one switch (if both A1 and B1 are passive)? Edit: Another brainpuzzle I don't get it - each host (as in server) should not have more iSCSI bandwidth available than the storage processor. What on earth does this matter? If serverA have 1gbit and serverB have 100mbit, then the resulting bandwith between them is 100mbit. How can this result in some kind of oversubscription? Edit4: Wait, what. Active and passive ports? The VNX runs in a ALUA configuration with asymmetrical active/active.. there shouldn't be any passive ports, only preferred ones..

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• setting up phpmyadmin with nginx within ubuntu 11.04

  - by Patrick

  I have nginx and php5-fpm running on ubuntu 11.04. I have installed phpmyadmin but im having trouble accessing it. I would like to access it via http://localhost/phpmyadmin I've used all the default locations for the nginx, php5, and phpmyadmin installs. I'm being directed to use the block below by the blog guide im following, but im not sure what to change to get it to point how im wanting it to. server { listen 80; server_name php.example.com; // <-I know i need to edit this, but not sure to what. access_log /var/log/nginx/localhost.access.log; root /usr/share/phpmyadmin; index index.php; location / { try_files $uri $uri/ @phpmyadmin; } location @phpmyadmin { fastcgi_pass 127.0.0.1:9000; fastcgi_param SCRIPT_FILENAME /usr/share/phpmyadmin/index.php; include /etc/nginx/fastcgi_params; fastcgi_param SCRIPT_NAME /index.php; } # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000 # location ~ \.php$ { fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME /usr/share/phpmyadmin$fastcgi_script_name; include fastcgi_params; } }

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• Extremely high mysqld CPU usage with no active queries

  - by RadarNyan

  I have a VPS running Ubuntu 12.04 LTS with LEMP stack, followed the guide from Linode Library (since I'm using a Linode) to setup, and everything worked fine until now. I don't know what's wrong, but my CPU usage just goes up since a week ago. Today things getting really bad - I got 74% CPU usage so I went check and found that mysqld taking too much CPU usage (somewhere around 30% ~ 80%) So I did some Google Search, tried disable InnoDB, restart mysql, reset ntp / system clock (Isn't this bug supposed to happen more than a year ago?!) and reboot my VPS, nothing helped. Even with mysql processlist empty, I still get mysqld CPU usage very high. I don't know what I missed and have totally no idea, any advice would be appreciated. Thanks in advance. Update: I got these from running "strace mysqld" write(2, "InnoDB: Unable to lock ./ibdata1"..., 44) = 44 write(2, "InnoDB: Check that you do not al"..., 115) = 115 select(0, NULL, NULL, NULL, {1, 0}^[[A^[[A) = 0 (Timeout) fcntl64(3, F_SETLK64, {type=F_WRLCK, whence=SEEK_SET, start=0, len=0}, 0xbfa496f8) = -1 EAGAIN (Resource temporarily unavailable) hum... I did tried to disable InnoDB and it didn't fix this problem. Any idea? Update2: # ps -e | grep mysqld 13099 ? 00:00:20 mysqld then use "strace -p 13099", the following lines appears repeatedly: fcntl64(12, F_GETFL) = 0x2 (flags O_RDWR) fcntl64(12, F_SETFL, O_RDWR|O_NONBLOCK) = 0 accept(12, {sa_family=AF_FILE, NULL}, [2]) = 14 fcntl64(12, F_SETFL, O_RDWR) = 0 getsockname(14, {sa_family=AF_FILE, path="/var/run/mysqld/mysqld.sock"}, [30]) = 0 fcntl64(14, F_SETFL, O_RDONLY) = 0 fcntl64(14, F_GETFL) = 0x2 (flags O_RDWR) setsockopt(14, SOL_SOCKET, SO_RCVTIMEO, "\36\0\0\0\0\0\0\0", 8) = 0 setsockopt(14, SOL_SOCKET, SO_SNDTIMEO, "<\0\0\0\0\0\0\0", 8) = 0 fcntl64(14, F_SETFL, O_RDWR|O_NONBLOCK) = 0 setsockopt(14, SOL_IP, IP_TOS, [8], 4) = -1 EOPNOTSUPP (Operation not supported) futex(0xb786a584, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0xb786a580, {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1 futex(0xb7869998, FUTEX_WAKE_PRIVATE, 1) = 1 poll([{fd=10, events=POLLIN}, {fd=12, events=POLLIN}], 2, -1) = 1 ([{fd=12, revents=POLLIN}]) er... now I totally don't get it x_x help

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• What are the frequencies of current in computers' external peripheral cables and internal buses?

  - by Tim

  From Wikipedia, three different cases of current frequency are discussed along with the types of cables that are suitable for them: An Extra Ordinary electrical cables suffice to carry low frequency AC, such as mains power, which reverses direction 100 to 120 times per second (cycling 50 to 60 times per second). However, they cannot be used to carry currents in the radio frequency range or higher, which reverse direction millions to billions of times per second, because the energy tends to radiate off the cable as radio waves, causing power losses. Radio frequency currents also tend to reflect from discontinuities in the cable such as connectors, and travel back down the cable toward the source. These reflections act as bottlenecks, preventing the power from reaching the destination. Transmission lines use specialized construction such as precise conductor dimensions and spacing, and impedance matching, to carry electromagnetic signals with minimal reflections and power losses. Types of transmission line include ladder line, coaxial cable, dielectric slabs, stripline, optical fiber, and waveguides. The higher the frequency, the shorter are the waves in a transmission medium. Transmission lines must be used when the frequency is high enough that the wavelength of the waves begins to approach the length of the cable used. To conduct energy at frequencies above the radio range, such as millimeter waves, infrared, and light, the waves become much smaller than the dimensions of the structures used to guide them, so transmission line techniques become inadequate and the methods of optics are used. I wonder what the frequencies are for the currents in computers' external peripheral cables, such as Ethernet cable, USB cable, and in computers' internal buses? Are the cables also made specially for the frequencies? Thanks!

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• AWS own email domain and some generic questions

  - by John Brunner

  I'm getting started with Amazon Web Services and I have a few question I'm not sure about. As every (company) webpage I want to use an "[email protected]" email adress, but how is that done? I looked up at godaddy.com (for domain registration), the offer me an email adress like I want, but for 3 dollars per month. Is this possible with AWS? Because at AWS you have just a complex domain which is not very userfriendly or serious. Also I want to host my dynamic webpage on the amazon cloud, but I'm not sure if I'm doing that right. I've read many guides, and all I know is that I have to purchase a Elastic Compute Cloud, and a Simple Storage Service... and every guide is working with the basic linux package, why not Windows? Is it more expensive? I just want to host a mySQL Server for the dynamic webpage, which is reached over a normal domain. And one last question, if I sign up for an AWS account it asks me for an email account. But I found it a little bit unserious to write there my free-webmailer-adress... How is it done the normal way? Thanks in advance! Best regards, john.

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• Redirection of outbound UDP port NTP.

  - by pboin

  For my residential service, I changed ISPs to Zoom/Armstrong. Just after that, my NTP daemons stopped working. I dug deep and diagnosed the problem: Unprivileged ports are getting out. When i run 'ntpdate' for example, I go out on a high, unprivleged port, and get a response on UDP 123. That's fine. The 'ntpd' daemon though, expects to go out on 123 and get its reply there as well. This must be a common problem, because it's directly addressed in the NTP troubleshooting guide. Just to see what would happen, I wrote a detailed email to the general support address at Armstrong. They replied almost immediately with a complete technical answer! They have everything <1024 blocked, except for a few ports to support outbound VPN. So, the question: Can I use IPtables to essentially re-write my outbound UDP 123 up to 2123 or something like that? If I do, does there need to be a corresponding 2123-123 rule to translate the reply? This seems like NAT, but with ports, not addresses. True, I could run ntpdate from cron, but that loses all of the adjustment smarts of NTP.

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• Updating and deleting java (red hat / centos) (new)

  - by JochemTheSchoolKid

  I am a total noob with linux. So please explain clearly if you have a solution for me. I have an VPS and I want to update JAVA. I found a guide on the Java site which says: rpm -e < package_name I searched for the packages: [root@srv1 ~]# rpm -qa | grep java java_cup-0.10k-5.el6.x86_64 java-1.5.0-gcj-1.5.0.0-29.1.el6.x86_64 Than I tried to do the delete command [root@srv1 ~]# rpm -e java-1.5.0-gcj-1.5.0.0-29.1.el6.x86_64 error: Failed dependencies: java-gcj-compat is needed by (installed) java_cup-1:0.10k-5.el6.x86_64 java-gcj-compat >= 1.0.70 is needed by (installed) sinjdoc-0.5-9.1.el6.x86_64 What should I do now? Removing has worked thanks to the answer below Problem two! Now am I installing this package from java [root@srv1 java]# rpm -ivh jre-7u9-linux-i586.rpm Preparing... ########################################### [100%] 1:jre ########################################### [100%] Unpacking JAR files... rt.jar... Error: Could not open input file: /usr/java/jre1.7.0_09/lib/rt.pack jsse.jar... Error: Could not open input file: /usr/java/jre1.7.0_09/lib/jsse.pack charsets.jar... Error: Could not open input file: /usr/java/jre1.7.0_09/lib/charsets.pack localedata.jar... Error: Could not open input file: /usr/java/jre1.7.0_09/lib/ext/localedata.pack plugin.jar... Error: Could not open input file: /usr/java/jre1.7.0_09/lib/plugin.pack javaws.jar... Error: Could not open input file: /usr/java/jre1.7.0_09/lib/javaws.pack deploy.jar... Error: Could not open input file: /usr/java/jre1.7.0_09/lib/deploy.pack Can someone help me again with this?

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• How to determine the root cause of a system lockup on Ubuntu 8.04 LTS?

  - by jdt141

  I'm currently working a project that involves setting up a PC/104 stack and running Ubuntu 8.04 LTS. We need to use the PC/104 stack because its an embedded application - and we're required to use a DeviceNet peripheral card to communicate to other devices. (DeviceNet is just a protocol on top of CAN.) Anyway, the following hardware is on the stack: Kontron MOPSPM104 with a 1GHz Intel Celeron processor ConnectTech FlashDrive/104 4GB Industrial Temp (-40 to +85 C) Woodhead (Molex) PC104DVNIO DeviceNet card A run of the mill 104 power supply The Kontron Board offers two serial ports, one VGA out, and two USB ports. The DeviceNet card is an ISA card. Because of this (per the User's Guide for the Kontron Board), I have manually set the IRQs in the BIOS to be appropriately configured, and turned off ACPI in both the BIOS and passed the appropriate flag in GRUB. I've installed Ubuntu 8.04 desktop, 32 bit. The problem that I'm having is that, from time to time, the entire 104 stack locks up. This only seems to happen in two cases, both of which we're running GNOME. We have a custom application that uses the DeviceNet card, and the system will lock up, or (more frequently) when we're running Firefox and either surfing for some information or trying to test it - typically by streaming video from a IP-camera. The reason I ask this questions is I cannot determine the root cause of this lockup. The IRQs appear to correctly configured in the BIOS and as the Kernel sees them, and nothing is logged to dmesg. If you all could help me determine the root cause of this lockup, I would greatly appreciate it. Thanks.

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• Transferring an SQL Processor License to a virtual hosted environment

  - by Andrew Shepherd

  My company is currently hosting a service in-house, and we want to move to an externally hosted environment. We would then be using a virtual server. I understand that this might be spread across multiple machines, but from my perspective as a customer, this layer is abstracted away - I shouldn't know or care about the hardware that the OS is hosted on. We have a licensed edition of SQL Server 2008. This is one Processor license. Will it be a violation of the licensing agreement to use this in a virtual environment. From the reference guide here it says When licensed Per Processor With Workgroup, Web, and Standard editions, for each server to which you have assigned the required number of per processor licenses, you may run, at any one time, any number of instances of the server software in physical and virtual operating system environments on the licensed server. However, the total number of physical and virtual processors used by those operating system environments cannot exceed the number of software licenses assigned to that server For enterprise edition there is an added option: if all physical processors in a machine have been licensed, then you may run unlimited instances of SQL server 2008 in one physical and an unlimited number of virtual operating environments on that same machine. I'm having trouble getting my head around this. Would I theoretically have to get a license for every processor in this virtual environment (which is effectively impossible because I have no way of knowing how many processors there actually are)? Or can I just say that it's hosted on one "virtual" server, so that's OK?

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• sudo fdisk in a live session does not show all hard drives

  - by cornbread

  I am having Grub2 issues in my Ubuntu 10.04 dual boot, 2 hard drive system. So I am attempting to follow the standard grub2 reinstallation guide (cant post link because of spam filters allowing only one... ?_?) Don't know if this is the root of my problem, but my speedy internal HD with my OS on it is not showing up anywhere in a live session. Not in nautilus, behind fdisk.... no where. When I can get the main system to boot, there is no issue seeing all available partitions. But the live session sees only the 1TB internal media/backup hard drive. I need access to the other hard drive and it's partitions to finish the grub2 re-installation but I am not sure anymore that is the underlying issue. Anyone have experience with this? The issue I have identified as a grub2 issue is fully described here. SandPvvr describes it exactly. Some notes: I do not see the grub2 menu for my os's holding down the shift key after my bios screen works maybe 10% of the time Not related to reinstalling a windows os. havent been touched in a year do some web development. issue may have started when I was playing with ruby and django. not sure on this. Could a dev environment do this? fdisk in live session ubuntu@ubuntu:~$ sudo fdisk -l Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0001d518 Device Boot Start End Blocks Id System /dev/sdb2 1 121601 976759939 5 Extended /dev/sdb5 487 110765 885816036 83 Linux /dev/sdb6 110766 121601 87040138+ b W95 FAT32 /dev/sdb7 1 486 3903700+ 82 Linux swap / Solaris Partition table entries are not in disk order

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• openvpn problem

  - by Jared Voronik

  I have a problem with openvpn. I have already setup openvpn sucessfully on some other servers in the past (basic configuration, nothing special). On this server, I used the same config file, but for setting up nat iptables -t nat -A POSTROUTING -s 10.4.0.0/24 -o eth0 -j MASQUERADE doesn't work. It gives error: iptables v1.3.5: can't initialize iptables table `nat': Table does not exist (do you need to insmod?) Perhaps iptables or your kernel needs to be upgraded. How do I fix this error? Also, if I can't fix this error, can I do bridging instead of routing? I have only 1 interface, and I can connect to remote server only via ssh (and need to avoid reboots if at all possible) so if briding means a whole ethernet card has to be devoted to the openvpn (and no other servers) then briding is out, otherwise I can use briding. Do you know of a simple, step by step guide to configure openvpn briding (just simple openvpn server and clients that can access internet through vpn server, nothing fancy)?

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• Want to install GDB on Fedora 7 machine..

  - by RBA

  Hi, I want to install GDB GNU debugger for debugging C Programs, onto my fedora machine.. I installed the gzip file from gnu website, but it gives error during MAKE command.. I am doing all the steps correctly which reading from the readme file, and tutorial on internet. Please guide. Also i am trying to do from yum install gdb command and sudo apt-get install gdb, yum is not found in my system, i installed it, but now it is giving some unusual error, some file missing.. So no success with this.. sudo apt-get is working, but it is also giving some following errorss... [oracle@localhost Programs]$ sudo apt-get install gdb Password: Sorry, try again. Password: Sorry, try again. Password: oracle is not in the sudoers file. This incident will be reported. [oracle@localhost Programs]$ sudo apt-get install gdb I am in real nead of this gdb tool.. how to go about it.. Please share your experiences over this.. Thankx..

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• Windows 2003 DC to Windows 2008 R2 DC with same name and same IP

  - by TheCleaner

  Environment = Windows 2003 native domain with 8 DCs I've got an old domain controller that is running 2003, CA Enterprise role, DHCP, DNS, a few GPO scripts that point to shares on it, and some other minor functions. All our servers point to it as their primary DNS, and there's lots of references to its IP or name throughout the domain at this point (8+ years later). I really don't feel like manually changing all of this, it would be a pretty massive undertaking. I want to follow this guide: http://msmvps.com/blogs/acefekay/archive/2010/10/09/remove-an-old-dc-and-introduce-a-new-dc-with-the-same-name-and-ip-address.aspx to hopefully end up with basically an "in-place upgrade" so to say. I considered just doing a P2V of the box, but we don't really want to keep it around running 2003 to be honest. I also considered using a CNAME and adding a 2nd IP (the old one) but again, it seemed like it would be cleaner using the attached link. My actual question: Any gotchas or big caution signs when doing what the link suggests? Anyone gone down this road and have advice on how to proceed?

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• Rate limiting bandwidth per IP

  - by Yohan

  First, I am not that good with computer. I even had problem with Windows PC. Right now I own a restaurant which happened to offer free internet. My ISP has my connection setup using a Ubuntu 11.1 box. IP Address is 192.168.1.16 with netmask 255.255.0.0, dns is 192.168.1.1 and gateway is 192.168.1.1. My problem is that my customers complains all day about slow network. When I received that kind of complain, the first thing came to my mind is to scout my area and find out who is the culprit, and ask him not to waste our bandwidth. Now, it is getting bored scouting people around, and I need to implement to my Linux box to limit bandwidth. I don't care if their provider can't be faster, but I want to limit 70kbit for each person. More annoying are people who use flashget and torrents. Usually they consume the biggest bandwidth. My question, how can I limit that? Please guide me in easy way. I've spent few days reading tc documents but doesn't understand a thing. I am using Ubuntu 11.10 Basically, I want all my customer get 70kbps each, no matter what.

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• Timely automatic unexpected reboot on ubuntu desktop

  - by ahmad

  We have a remote linux server (ubuntu desktop). The system log indicates the system has been restarted on the timely fashion. Here is a part of the last output: ut pts/0 192.169.50.2-sta Sat Nov 24 22:17 still logged in reboot system boot 2.6.32-21-generi Sat Nov 24 22:04 - 22:17 (00:13) ut pts/0 server.local Sat Nov 24 21:36 - crash (00:27) reboot system boot 2.6.32-21-generi Sat Nov 24 15:55 - 22:17 (06:21) reboot system boot 2.6.32-21-generi Fri Nov 23 18:02 - 22:17 (1+04:14) reboot system boot 2.6.32-21-generi Fri Nov 23 10:39 - 22:17 (1+11:38) reboot system boot 2.6.32-21-generi Fri Nov 23 04:18 - 22:17 (1+17:59) reboot system boot 2.6.32-21-generi Fri Nov 23 03:57 - 22:17 (1+18:20) reboot system boot 2.6.32-21-generi Thu Nov 22 20:38 - 22:17 (2+01:38) reboot system boot 2.6.32-21-generi Thu Nov 22 11:13 - 22:17 (2+11:03) reboot system boot 2.6.32-21-generi Thu Nov 22 08:12 - 22:17 (2+14:05) reboot system boot 2.6.32-21-generi Wed Nov 21 11:16 - 22:17 (3+11:00) reboot system boot 2.6.32-21-generi Tue Nov 20 22:36 - 22:17 (3+23:41) reboot system boot 2.6.32-21-generi Tue Nov 20 14:12 - 22:17 (4+08:05) reboot system boot 2.6.32-21-generi Tue Nov 20 11:32 - 22:17 (4+10:44) reboot system boot 2.6.32-21-generi Tue Nov 20 01:52 - 22:17 (4+20:25) reboot system boot 2.6.32-21-generi Tue Nov 20 00:22 - 22:17 (4+21:55) reboot system boot 2.6.32-21-generi Mon Nov 19 17:27 - 22:17 (5+04:50) It looks the system is set to be restarted at 22:17. Can anyone guide me why this happens? Thanks in advance.

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• Users and Groups management on 7 Home Premium

  - by AviD

  Recently upgraded the home pc from XP pro, to Windows 7 Home Premium. I'm looking for a solution for a few things that seem to be missing from this edition... Since Local Users and Groups is blocked on Home Premium, I can't figure out how to manage groups, or even do anything even slightly advanced to users (basically, create/group/picture is it). net localgroup, net users, net etc dont seem to work - getting "system error 5". While I'm on the topic, I cant activate (what was once) "Local Security Policy"... Looking for any help, advice, or even a new direction cuz things is differ'nt on Winnows7... To clarify, I'm looking to do some of the following, which were simply back in XP-land: remote user only (i.e. no local logon) Grant special privileges for specific user grant access to e.g. C$ share for specific remote user create custom groups for users, to be able to separate privileges of say, my wife's from my kids define quite specifically what each user can do (beyond just standard users) Harden OS (hmm, i guess maybe what i'm looking for is security hardening guide for 7...?)

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• What is proper relationship between /etc/hosts and DNS A records for a Linux server?

  - by MountainX

  I have an Ubuntu server. It is going to be a web server with a URI of www.example.com. I have a DNS A record pointing www.example.com to the server's IP address. Let's say I pick "trinity" as the hostname for this server. I want to set up the DNS records correctly. I need reverse DNS to www.example.com, so a CNAME for www.example.com doesn't seem appropriate. Here's my question: Is it considered best practice to set up two DNS records (which in my case would likely be two A records), one for www.example.com and one for trinity.example.com, both pointing to this server's IP address? (Or, even if it is not accepted as a best practice, is it a good idea?) If so, would the following be a proper /etc/hosts file? $ cat /etc/hosts 127.0.1.1 trinity.local trinity 99.100.101.102 trinity.example.com trinity www.example.com This server is a Linode and Linode's docs seem to imply that the above approach is best (if I am reading them correctly). Here's the relevant section. I bolded the line that seems to apply here. Update /etc/hosts Next, edit your /etc/hosts file to resemble the following example, replacing "plato" with your chosen hostname, "example.com" with your system's domain name, and "12.34.56.78" with your system's IP address. As with the hostname, the domain name part of your FQDN does not necesarily need to have any relationship to websites or other services hosted on the server (although it may if you wish). As an example, you might host "www.something.com" on your server, but the system's FQDN might be "mars.somethingelse.com." File:/etc/hosts 127.0.0.1 localhost.localdomain localhost 12.34.56.78 plato.example.com plato The value you assign as your system's FQDN should have an "A" record in DNS pointing to your Linode's IP address. For more information on configuring DNS, please see our guide on configuring DNS with the Linode Manager.

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• Hibernate between OS X and Bootcamp Win 7

  - by Willem

  Wouldn't it be great if someone wrote a guide or an app which allowed you to switch instantly between OS X and Windows using Hibernate in both OS:s? Windows 7 already has an option "Hibernate" which allows you to boot back to your OS X partition, but OS X does not exactly offer the same. However, there are possibilities here. It seems that the recent Mac's have 3 different kinds of sleeping mode: Sleep: Low power consumption, RAM still active. Legacy Safe Sleep: No power consumption(?), writes RAM to disk and shuts down (is this the same as Hibernate?) Safe Sleep: Writes RAM to disk and enters sleep mode. If battery level drops too low it goes into Hibernate (is this Hibernate the same as #2 in this list? This is the Hibernate I will be referring to int he rest of this post) It seems that I am unable to force my MacBook Pro (Late 2011) OS X 10.7.3 into a true hibernate using either command line or apps that are supposed to do this. I believe the Mac should show that white loading bar whilst waking up if it was truly put into hibernate (which it does not). But I can get this white bar to show by letting my battery level drop to 0% so there is obviously a system function for it (obviously, duh! :). When Win 7 goes into hibernate it shuts down completely and you can then boot into OS X on startup. On OS X however, hibernate forces you to wake up into OS X. Can you hack this so that you're allowed to select boot partition after OS X hibernates? Would it be possible to use the true hibernate system functionalities of Win 7 and OS X to create a kind of instant switching between the two? Imagine this on a quick SATA-3 SSD like my 180GB Intel 520. Thanks / Willem

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• Problems Installing slapd On Ubuntu Server 11.10

  - by Zach Dziura

  I know that there's a Ubuntu-specific StackExchange website, but I thought that I'd ask here because it's a server-specific question. If I'm wrong in my logic... Well, you people are better at this than I am! O=) On with the show! I'm in the process of installing Oracle Database 11g R2 Standard Edition onto Ubuntu Server 11.10. I found a guide on the Oracle Support Forums that walks you through the process fairly easily. Unfortunately, I'm running into issues installing one particular dependency: slapd. When I go to install it, I get this error message: (Reading database ... 64726 files and directories currently installed.) Unpacking slapd (from .../slapd_2.4.25-1.1ubuntu4.1_amd64.deb) ... Processing triggers for man-db ... Processing triggers for ufw ... Processing triggers for ureadahead ... Setting up slapd (2.4.25-1.1ubuntu4.1) ... Usage: slappasswd [options] -c format crypt(3) salt format -g generate random password -h hash password scheme -n omit trailing newline -s secret new password -u generate RFC2307 values (default) -v increase verbosity -T file read file for new password Creating initial configuration... Loading the initial configuration from the ldif file () failed with the following error while running slapadd: str2entry: invalid value for attributeType olcRootPW #0 (syntax 1.3.6.1.4.1.1466.115.121.1.15) slapadd: could not parse entry (line=1051) dpkg: error processing slapd (--configure): subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing: slapd E: Sub-process /usr/bin/dpkg returned an error code (1) After much Google searches and forum trolling, I have yet to find a definitive answer as to what's going wrong. The error messages seem straight forward enough, but I have no idea how to debug this. Can anyone offer some assistance? Again, if I'm asking in the wrong place, I apologize. If I'm indeed asking properly, then thank you for any and all help!

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• Make UEFI, GPT, Bootloader, SSD, USB, Linux and Windows work together

  - by user129552

  I like to use the latest hardware and the latest software; thus I have a Laptop (Lenovo X220) with UEFI instead of BIOS an SSD instead of an HDD GPT partitioning scheme instead of MBR USB to boot from instead of optical disks. I need to use both Windows and Linux. I tried to make them work alongside, but I didn't succeed. Most Linux distribution isos don't even really work on UEFI systems booted from USB. (Not even the self-claimed cutting-edge Fedora. I also tried Linux Mint Debian Edition and Sabayon Linux (according to this guide) which did not work. Only Ubuntu worked for me. I first installed Windows 8 which created sda1: Recovery, sda2: EFI system, sda3: msftres, sda4: NTFS Windows. Windows worked without a problem. I then created sda5: linux-swap and installed Ubuntu into sda6: btrfs. After rebooting, I was not presented GRUB2 as expected, but instead my system just booted into Ubuntu. I could no longer access Windows. After fixing dpkg in btrfs Ubuntu, I followed the Ubuntu documentation on UEFI booting. The result left me with a broken GRUB2, but interestingly, when I wanted to select the device to boot from, I was not only presented the internal SSD, an attached USB device, or LAN, but also Grub2 (broken), Ubuntu and Windows. The result is not very satisfying to me. What would I have to do to fix everything? Or differently asked, what operating system should I install at what point given my possibilities and requirements, so that I have a working bootloader in my UEFI GPT system which presents me a working Linux and Windows.

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• Multiple rack apps on nginx + passenger, one as root, the other not...config help

  - by cannikin

  So I've got two apps I want to run on a server. One app I would like to be the "default" app--that is, all URLs should be sent this app by default, except for a certain path, lets call it /foo: http://mydomain.com/ -> app1 http://mydomain.com/apples -> app1 http://mydomain.com/foo -> app2 My two rack apps are installed like so: /var /www /apps /app1 app.rb config.ru /public /app2 app.rb config.ru /public app1 -> apps/app1/public app2 -> apps/app2/public (app1 and app2 are symlinks to their respective apps' public directories). This is the Passenger setup for sub URIs described here: http://www.modrails.com/documentation/Users%20guide%20Nginx.html#deploying_rack_to_sub_uri With the following config I've got /foo going to app2: server { listen 80; server_name mydomain.com; root /var/www; passenger_enabled on; passenger_base_uri /app1; passenger_base_uri /app2; location /foo { rewrite ^.*$ /app2 last; } } Now, how do I get app1 to pick up everything else? I've tried the following (placed after the location /foo directive), but I get a 500 with an infinite internal redirect in error.log: location / { rewrite ^(.*)$ /app1$1 last; } I hoped that the last directive would prevent that infinite redirect, but I guess not. /foo gets the same error. Any ideas? Thanks!

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• How can I change the binding order of network adapters in Windows 7?

  - by Chris Farmer

  The end goal here is that I am trying to install an Oracle 10g server on my Windows 7 x64 dev box. I use DHCP, and the Oracle installer is throwing up this warning: Checking Network Configuration requirements ... Check complete. The overall result of this check is: Failed <<<< Problem: The install has detected that the primary IP address of the system is DHCP-assigned. Recommendation: Oracle supports installations on systems with DHCP-assigned IP addresses; However, before you can do this, you must configure the Microsoft LoopBack Adapter to be the primary network adapter on the system. See the Installation Guide for more details on installing the software on systems configured with DHCP. I have installed the loopback adapter, but I am not sure how to make it the primary network adapter. I see this Microsoft KB article on the subject but it's Windows XP-oriented, and I can't seem to find a comparable one for Windows 7. Some of the options it talks about don't seem to be present in the views of the adapters that I see. So, how can I make the loopback adapter become the primary adapter?

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• What is the proper way of debugging a slow Windows installation?

  - by Niklas

  You know the drill - you've been asked to check why you cousin's computer is running slow. I was there yesterday. Being a Mac user since 2007 I haven't really dug deep in Windows internals in the past five years. Googling for answers reveals many, many different answers: broken registry, spyware, antivirus program, fragmented disk, turning of visual effects etc. In this particular case I was asked to look at a two year old HP laptop with Vista. Windows was running incredibly slow and even opening up a new explorer window took almost a minute. I ended up doing everything of the above: running cc cleaner, defragmenting the disk, turning off visual effects, turning off norton and a bunch of other things people believe have an impact on Windows performance. Now I'd like to understand this in depth. Is there a proper, "scientific" if you so will, way of debugging and understanding where the problem with a slow running Windows installation lies? (In my particular case this concerned Windows Vista but let's try to create general guide for XP and Windows 7 too). To me, it seems wrong to just run a bunch of different tools without understanding the underlying cause of the error.

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• IP routing Solaris 9 access the internet from local network

  - by help_me

  I am trying to configure the NICS on the Solaris Sparc server. My problem lies in getting out to the "Internet" from the local network. I have requested the NIC to receive a DHCP server address #ifconfig -interface dhcp start. If anyone could guide me as to what I need to do next. I am not able to ping 4.2.2.2 or access the internet. Much appreciated, thank you #uname -a SunOS dev 5.9 Generic_122300-59 sun4u sparc SUNW,Sun-Fire-V210 ifconfig -a lo0: flags=1000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4> mtu 8232 index 1 inet 127.0.0.1 netmask ff000000 bge0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2 inet 10.100.0.3 netmask ffffc000 broadcast 10.100.63.255 bge0:2: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2 inet 10.100.0.22 netmask ffffc000 broadcast 10.100.63.255 bge3: flags=1004843<UP,BROADCAST,RUNNING,MULTICAST,DHCP,IPv4> mtu 1500 index 12 inet 169.14.60.37 netmask fffffe00 broadcast 169.14.61.255 cat /etc/defaultrouter 10.100.0.254 169.14.60.1 cat /etc/resolv.conf nameserver 169.14.96.73 nameserver 169.10.8.4 netstat -rn Routing Table: IPv4 Destination Gateway Flags Ref Use Interface -------------------- -------------------- ----- ----- ------ --------- 169.14.60.37 169.14.60.1 UGH 1 0 169.14.60.0 169.14.60.37 U 1 18 bge3 10.100.0.0 10.100.0.3 U 1 34940 bge0 10.100.0.0 10.100.0.22 U 1 0 bge0:2 224.0.0.0 10.100.0.3 U 1 0 bge0 default 10.100.0.254 UG 1 111 default 169.14.60.1 UG 1 26 127.0.0.1 127.0.0.1 UH 10 59464 lo0 bash-2.05$ sudo ndd -get /dev/ip bge0:ip_forwarding 1 bash-2.05$ sudo ndd -get /dev/ip bge3:ip_forwarding 1 bash-2.05$ sudo ndd -get /dev/ip ip_forwarding 1

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• Dual-booting Windows 7 and Ubuntu

  - by CFP

  Hello everyone, I've just received my Dell Studio 17 laptop, which comes with Windows 7 x64 preinstalled. I'm having quite a hard time installing ubuntu on it. First of all, here is how I partitioned the drive using GPartEd: |==Dell utility partition==|==Dell Recovery partition==|==Windows 7==|[==Ubuntu==|==Data partition==]| Where [] denotes an extended partition. Here are the steps I completed: I used GParted to create this structure, keeping windows 7 installed I booted ubuntu LiveCD, and installed it on the right partition I let it install grub automatically I rebooted intu ubuntu I went back to windows 7, no problems I then rebooted. Grub was gone. I used Super Grub Disk to restore grub, it didn't work. I tried to boot into ubuntu from supergrubdisk, but grub couldn't fint the boot folder I then reinstalled ubuntu, went through the same steps, but there SGD did boot my ubuntu I reverted to the previous version of grub, and installed it on my hard drive It worked, but trying to boot win7 got me the "No MBR, press Ctrl+Alt+Del to reboot" error I used the windows 7 cd to restore the MBR (the auto wizard didn't work, had to rebuild the mbr from command line Now Ubuntu is gone. 7 works fine I read a lot about this, and realized that many people could simply not boot win7 again after encountering this problem. Now I'd like to restore GRUB, but I really won't go through the hassle of doing a full new cycle of installing/reinstalling everything again. Is there a GRUB guru around, to provide me with a detailed guide to not screwing everything up once again? Thanks a lot!

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