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• Cannot run gnome-session

  - by Brian

  I'm having issues running an X Windows session on a RHEL5 64-bit server - whenever I execute the command "gnome-session &", the process goes into the background but nothing happens. I have Exceed installed on my Windows machine which is running when I try to start the gnome-session. I've tried just starting firefox by itself instead of the whole gnome session, but it doesn't work either. Any suggestions? BTW, here's the error message I get when I try to start firefox: firefox: Fatal IO error 104 (Connection reset by peer) on X server localhost:10.0.

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• ZFS on top of iSCSI

  - by Solipsism

  I'm planning on building out a file server using ZFS and BSD, and I was hoping to make it more expandable by attaching drives stored in other machines in the same rack via iSCSI (e.g., one machine is running ZFS, and others have iSCSI targets available to be connected to by the ZFS box and added to zpools). Looking for other people who have tried this has pretty much lead me to resources about exposing iSCSI shares on top of ZFS, but nothing about the reverse. Primarily I have the following questions: Is iSCSI over gigabit ethernet fast enough for this purpose, or would I have to switch to 10GbE to get decent performance? What would happen when one of the machines running iSCSI targets disconnects from the network? Is there a better way to do this that I just am not clever enough to have realized? Thanks for any help.

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• Audio Line-In on Ubuntu/Linux Mint

  - by hahuang65

  I'm currently on Windows, and want to switch to Linux, but some hardware issues are preventing me. Mainly, I have a sound card that supports Line-In. On Windows, anything I plug into the line-in gets outputted to the speakers. However, when I installed Linux, because there is not a control application that comes with the driver, I have no idea how to set this up. I tried going to the sound settings and it doesn't seem to be there. I also want to configure it for 2.1 sound, and do not know how to do that... Anyone here done it before? Thanks in advance for the help!

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• An international mobile app - Should I set up EC2 instances in multiple regions?

  - by ashiina

  I am currently trying to launch an mobile app for users around the world. It is not a spectacular launch which will get millions of users in weeks - just another individual developer releasing an app. I know enough about the techniques of managing timezones, internationalizing string, and what not ( the application layer ). But I cannot find any information on how I should manage my EC2 instances... Should I be setting up EC2 instances in different regions around the world? Is that a must-do, or is it an overkill? I'm aware that it's the ideal solution in terms of performance, but it becomes very tough managing servers in multiple regions. DB issues, AMI management, etc... I'd much rather NOT do so. So I would like to know the general best practice when launching an international app/website. Note: For static contents, I know it's better to use a CDN, so I'm planning on doing so.

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• What is shrink_slab, and why is it showing up in /var/log/messages?

  - by Steve Kehlet

  I'm investigating some application issues on a Linux system and noticed this around the time of the most recent problem, but not close enough to be definitively related: Jun 7 17:51:49 localhost kernel: shrink_slab: nr=-155456000 Jun 7 17:51:49 localhost kernel: shrink_slab: nr=-157859400 Jun 7 17:51:49 localhost kernel: shrink_slab: nr=-157833400 Jun 8 06:20:23 localhost kernel: shrink_slab: nr=-284172800 What is this? Googling isn't helping, I get that it's something with VM, but why is it suddenly showing up in /var/log/messages? Edit: I take it it's showing this because the number of pages it could free ("nr") is negative. Which is presumably a bad thing. I found patches for newer kernels that display a more useful message to this effect. Still not sure what this means though, or what I need to do about it.

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• Windows 7 Enterprise, Service Pack 1. Software MS Office Excel 2010

  - by user327560

  In Excel I understand there is no mechanism to customise & re-label the Rows & Columns (i.e. Renaming Col. A to some text like "Item Number" and so on. My question is regarding if it's possible to start Row Numbering at zero, or to determine a pre-allocated number of rows which contain my Headers, and then the first Row with the detail is infact seen as Row 1? Reason for question is I work multiple INternational Projects and we use Excel to trsack alot of activities & issues. Oddly, many people will refer to, for example "Point 7"... Some people mean the ID 7 (which I have the first Column dedicated to ID Number), some mean Excel Row 7, which infact could be really ID 3, or 4 from Col. A.... Any easy way or workaround to just use the Excel Row Numbers but select from when Row 1 is counted?

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• SSL on Apache seems to significantly affect WebDAV performace

  - by takesides

  I'm using Apache 2.2 running on Windows Server 2008 R2 as a WebDAV server for clients to upload large media files (roughly 100-2000MB). I am finding that when I have SSL enabled (openSSL 0.9.8o) and use HTTPS for the uploads the throughput is around 13Mbps but when I disable it and just use HTTP I get around 80Mbps. I can't understand why this is happening as my understanding was that the heavy SSL work was done at the beginning of the connection. Does anyone have any idea why the performance is so drastically affected by enabling SSL? Cheers.

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• Is there a way to transfer windows license to a different machine?

  - by Alex Khvatov

  I purchased a license and used Windows 7 Home Premium 32 bit OS for a while. But recently I bought a 64 bit version to take advantage of the larger RAM the machine had and hence reinstalled the OS and activated a new license for the 64-bit version. Now, I am in a need to install the 32 bit version on another machine. How do I go about reactivating a license on another machine? (again the license currently is not used) Am I going to have issues with Microsoft not letting me reactivate that license on a different machine? Thank you.

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• Outlook '10 hangs often, IMAP sync

  - by user23150

  We have 3 employees using IMAP to sync with their Desktop and Android Phones. Two are using 70% of their accounts storage, another is using 80%. They all have similar counts on folder structure, etc. The employee with the 80% storage is constantly having Outlook freeze on them for up to 5 minutes at a time. I realize this is Outlook connecting and doing activity on the server, but no one else has this problem. In fact, one user with the 70% storage used uses a very slow laptop, and doesn't have freezing issues. The network is the same, the settings are the same - at a loss how to proceed? Obviously "Outlook is a crummy IMAP client" doesn't help management...

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• Web Server Setup

  - by gustyaquino

  Hello, In my workplace, we want to implement your own web server for at leat 100 Apache/PHP/MySQL web pages. My boss is opposed to hiring skilled personnel, he think we can do ourselves. Currently, we are working with hostgator reseller account. I chose CentOS as the operating system, but I don't know the best hardware solution. HP, Dell ? What about the setup on these platforms? Thanks. PS: sorry for my bad english Edit: The purpose of this migration isn't related to performance issues. But independence.

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• Recommendations for SSD for server and database use?

  - by Tony_Henrich

  SSDs are a new technology and they are constantly improving. A lot of the posts here were posted in 2009 when SSDs where less mature and not as fast. What was recommend back then is probably out of date today because of better options. The SSD is used to hold SQL Server databases. Size is probably 128G. The database is used with a CMS and web server so web pages need to get their data and render as fast as possible. Which modern SSD is recommended for such a use? Is there an SSD better than Intel X-25 E/M in terms of performance/cost? (I am also evaluating cost between : RAM + UPS (semi persistent) vs SSD for same amount of gigabytes. No RAID is involved)

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• Are Virtual-Desktop Managers good or bad for system resources?

  - by jasondavis

  I am looking at Virtual-Desktop Managers for Windows 7. Right now it seems that VirtualWin is supposed to be about the best one available for use on Windows. I have never used anything like this though and I am just curious from others experience and knowledge, does something like this hog up a lot of system resources? I do not NEED it but it is a nice feature to have when I do want to use it, my PC's performance is more important then using it. So is virtual esktop managers a resource hog or probably not? Please share any tips/advice/ or comments on them, thank you =)

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• Windows Internet Connection Issue (HELP)

  - by semajjames1399

  I have a windows 8 hp dual booting ubuntu. When i log onto windows i cant get on the internet... But skype and other applications can just now webpages in a browser what so ever (this is on windows 8). But on ubuntu i have no internet issues at all. From what i see right now its only the browsers in windows 8 that cant get the internet, and ive tried all the browsers i had (chrome, ie, firefox) and they cant connect but in the win8 notification area it says im connected. I can even ping via cmd. HELP! Thanks. Whats not working is that i cant get access the internet through the windows 8 broswer.

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• PHP session files have permissions of 000 - They're ununsable

  - by vanced

  I kept having issues with a Document Management System I'm trying to install as, at the first step of the installation process, it would error with: Warning: Unknown: open(/tmp/sess_d39cac7f80834b2ee069d0c867ac169c, O_RDWR) failed: Permission denied (13) in Unknown on line 0 Warning: Unknown: Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0 I looked in /tmp and saw the sess_* files have the following permissions ---------- 1 vanced vanced 1240 Jan 20 08:48 sess_d39cac7f80834b2ee069d0c867ac169c All the session files look like this. So obviously, they're unusable by PHP and it's causing me lots of problems. How can I get PHP to set the correct permissions? I've tried changing the directory which php.ini uses to /tmp/phpsessions and the same thing occurs. The directories are a+rwx.

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• Having an issue with Java/ minecraft (Windows 7 64bit)

  - by MetroGnome

  I have had issues with java on my computer for a while. First of all, java has never worked on Google Chrome or Firefox, Only IE. Whenever I need to use Java, I use IE. Now, I just tried to play minecraft the other week and I receive the error "fatal error (1)" and get a black screen (this is on the online free version). Now, I searched for java and found that I have Java 32 bit. I cannot uninstall it on Revo uninstaller or Windows uninstaller. What should I do?

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• Out of nowhere, ssh_exchange_identification: Connection closed by remote host

  - by disusered

  I am running Ubuntu 10.10 on a remote box. I ssh to it everyday without issues but today out of the blue, I get the following error: ssh_exchange_identification: Connection closed by remote host If I connect with -vv, I get the following: OpenSSH_5.6p1, OpenSSL 0.9.8r 8 Feb 2011 debug1: Reading configuration data /Users/bla/.ssh/config debug1: Applying options for ubuntu-server debug1: Reading configuration data /etc/ssh_config debug1: Applying options for * debug2: ssh_connect: needpriv 0 debug1: Connecting to ubuntu-server.com [123.123.123.123] port 22. debug1: Connection established. debug2: key_type_from_name: unknown key type '-----BEGIN' debug2: key_type_from_name: unknown key type '-----END' debug1: identity file /Users/bla/.ssh/id_rsa type -1 debug1: identity file /Users/bla/.ssh/id_rsa-cert type -1 ssh_exchange_identification: Connection closed by remote host If I remove the key, I get the exact same output (sans "debug2: key_type_...). I've managed to log in physically and checked my hosts.allow and hosts.deny but they have no entries. I tried removing and reinstalling OpenSSH, checked authorized_keys and ~/.ssh permissions and tried connecting from other computers only to get the same error. I'm at my wits end, any help would be greatly appreciated.

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• How to stop any dialog windows from showing when inserting a USB drive in Windows?

  - by jasondavis

  1) I just found a really interesting program that allows me to use a USB drive as a windows login key. It is called Rohos Logon Key. IF I remobve my USB drive/key from the PC then I can have the PC lock or hibernate or any other option, I have been looking for such a solution for many years but never knew one existed until this and it works much better then I imagined. I do have a couple minor issues though (im using Windows 7 pro). When I remove and then re-insert my USB key, windows prompts me with this dialog here... Generally when I get this I just click on "Continue without scanning" however I am looking for a solution to just make it not even show this at all, is it possible to disable it from showing? 2) I also get this dialog as well when I insert USB drives/key... Would it be possible to not show this as well or have it pick an option by default or anything really?

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• How to convert a power point pdf to a pdf that is easy to read on kindle?

  - by SpaceTrucker

  I have several power point presentations as pdfs. I would like to read them on the original kindle in landscape format. When I read the original on the kindle then a single slide won't fit on the kindles display. I thought the easiest way to convert the pdf was to repring it with a pdf printer. However I don't know the paper size to use. I already tried using Calibre as suggested by this question. However the output is not usable because of formatting issues. So what paper size should I use for the pdf printer to reprint them in landscape format or are there any other tools I could use for that task?

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• What questions do I need to ask for a database sync?

  - by user65745

  I am currently helping to implement an RFID inventory management system for my company. The software that we are locked into has been at best buggy and unreliable. The software provider is now rolling out a major release. My problem is that the new software release keeps a local database on each machine that then syncs to a master database online. According to the software company we cannot do a scaled rollout because of data corruption issues between the software releases. What questions can I be asking and what sort of testing can I do on my end to make sure this software works? Any suggestions would be very helpful.

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• Can NFS be forced to refresh stale files/directories when not using noac on the mount?

  - by johnnycrash

  We mount without using noac. I have a file that I append to once every 20 minutes. Then it will be read with mmap about 5,000 times a minute. We only mmap a couple blocks for each read. Needless to say, noac just kills the access performance, so we don't use it. I add data to the end of the file using a mount with noac and read from a mount without noac. The mounts that are reading are not seeing the new data. I want to know if there is a function I can call from c to refresh the attributes of a path and all its files. EDIT: I should add we cannot mount and unmount since there are 16 servers running on each system and they are constantly accessing the files. Well...maybe we could mount and unmount if each server used their own mount. I'd like to avoid that if possible. thanks!

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• E2K7: Can't add jounaling mailbox to storage group

  - by Agent

  We just added a new SG to a standalone E2K7 server but Exchange pops an error when we try to enable journaling on it. The journal recipient mailbox was created a while back and as far as we can tell there are no issues with it. It's viewable in the GAL and accessible through OWA. The error is: Set-Mailboxdatabase Error:Obkect "domain.company.com/Journaling/Journal5" could not be found. Please make sure that it was spelled correctly or specify a different object. This Journal5 account is in a child domain (like all the other journaling mailboxes we have attached to other mailbox server SGs). We also tried attaching one of the working journaling mailboxes to this SG but they also popped back the same error. Event log is now showing any errors at all. We are running SP1 on this server. I've tried dismounting/remounting the store and bouncing the IS and SA services but that didn't help any. Any suggestions?

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• ESXI 4.0 Slow response in opening anything accross the network on a Virtual Server running Win2008

  - by user40944

  Hi I recently installed a HP ML350G6 Server with Windows Small Business Server 200864bit, Exchange 2007. The server was running fantastically and we transferred all user data onto the new server and no problems for 2 weeks! We then installed SQL2008 and transferred the accounts package onto the server and this is where the problems started. Users are now complaining to open a work document can take 2 minutes and the same with regard to anything else. The server itself seems fine, the virtual server seems fine! No disk performance problems (doesn't go above 50% unless i really copy lots of things), no memory, (12Gb only using 7Gb) cpu (usage is low average about 15%) etc on both the VM and in Windows Task manager. I have made sure disk caching is enabled on the raid controller (which made no difference). Network cards are running 1Gb and plugged into HP GB switch. Please help!

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• Average Difference and Direction Between Values in Excel with Blanks

  - by 114

  I have a sheet that looks something like this: Sheet 1 1 2 3 4 5 6 7 8 9 10 11 1 6 2 3 5 3 4 2 4 9 4 5 6 4 6 6 7 5 3 3 3 10 8 4 8 8 9 4 11 12 12 6 10 11 8 5 5 4 9 4 7 6 What I would like to be able to do is find the average difference and direction between values in each column. For example, the first 4 rows would look like: Average Difference # + Movements # -Movements 1 2 2 1 0 3 4 (2+5+5)/3 2 1 Blanks represent N/A values due to insufficient information, and differences are calculated successively i.e. col2-col1, col3-col2, col4-col3 If I just take the differences and make a duplicate table with the formula =C2-B2 copied across issues arise whenever there is a blank space between two values or at the beginning of the row. Is there an easy way to fix this or another way to do this that I might be missing?

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• Ubuntu 13.10 has no Suspend or Hibernate Options

  - by Charlie Davies

  I have a Lenova Yoga 2 Pro, and I have Ubuntu 13.10 installed. I am having some issues setting the power functions. At the moment I can not suspend or hibernate the laptop. So from Gnome 3.10 I have the option to Log Out, Shutdown & Restart. No option for Suspend / Hibernate. Weirdly however I can use these commands to get the right behaviour sudo pm-suspend sudo pm-hibernate So the laptop knows how to do this, it just is not giving me the option and also when I set "Close screen lid" to suspend, well nothing happens. It feels like there is a "connection" not being made.

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• What is the best way to shutdown hard disk?

  - by Sunil

  Right Now I'm using hdparm command in unix to shut down the hard disk but there are few issues with it. when it wakes back up it consumes lots power. Is there any other way to do it? Many times when I put my hard disk to sleep, I can see few bursts at the beginning and then after a while it goes to sleep. I think its because of the journaling system in ubuntu (which I use) Have anybody encountered that? What would be the best linux/unix operating system (eg: ubuntu/centos/redhat) to work on extensive hard disk operations? I would highly appreciate if you could share the problems you encountered while doing this operation.

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