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• Debian: Unable to mount a second drive as a subdirectory inside of another partition.

  - by jkndrkn

  Hello. I have the following /etc/fstab: # /etc/fstab: static file system information. # # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc defaults 0 0 /dev/md1 / ext3 defaults,errors=remount-ro 0 1 /dev/md0 /boot ext3 defaults 0 2 /dev/md5 /home ext3 defaults 0 2 /dev/md3 /opt ext3 defaults 0 2 /dev/md6 /tmp ext3 defaults 0 2 /dev/md2 /usr ext3 defaults 0 2 /dev/md4 /var ext3 defaults 0 2 /dev/md7 none swap sw 0 0 /dev/sdc /home/httpd ext3 defaults 0 2 /dev/hda /media/cdrom0 udf,iso9660 user,noauto 0 0 /dev/sdc1 /mnt/usb/backup-1 auto defaults 0 0 I am unable to get /dev/sdc/ to mount at /home/httpd/ on reboot. The /home/httpd/ directory exists. Mounting via mount -t ext3 /dev/sdc /home/httpd works just fine. Mounting via mount -a generates the following error message: mount: you must specify the filesystem type This is, incidentally, the same message that I see while booting. The error message goes away if I comment out the line in fstab starting with /dev/sdc.

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• Router(s) Issue: DNS quries sporadically fail with multiple computers hooked in

  - by bob-the-destroyer

  Basically, after anywhere from 5-60 minutes, DNS queries fail for a few minutes, then slowly begin to resolve correctly. Then the cycle repeats. This occurs only when more than one computer is on the network. All computers on the network experiences the same sporadic DNS outage at the same time. Wireless or wired, Linux or Windows, fresh OS install or old, browser or ping, same symptoms. Duplicated on 3 routers (not chained together, mind you) and 3 ISP's and 3 separate locations over the past several months. The only common theme is a single 5-yo WIN XP laptop which has been in use on the network throughout all this. There also may be anywhere between 1 - 10 devices hooked up wired or wirelessly at a time. The only reprieve I have from this torture is by using any VPN to an outside source - always smooth sailing. I typically set up any router to a) use WPA2/etc security; b) MAC whitelist; c) UPNP OFF (if available); d) always update firmware when available; e) obtain DNS from ISP automatically; f) set the router to act as DHCP server for the internal network. Adjusting channels has no effect. Any ideas?

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• Checking for valid document files

  - by sweb

  I need a simple way to check if my files are valid documents (pdf, doc, docx, ppt, pptx, xls, xlsx, odt, ods, odp and etc). I can't use file because magic does not work well at all. For example, for PDF files, this is my output. sweb@sweb-laptop: /media/files/ebooks/PDF and CHM$ file --mime *. Pdf PHP 5 for Dummies. Pdf: application/pdf; charset=binary PHP 6 and MySQL 5 for Dynamic Web Sites. Pdf: application/octet-stream; charset=binary PHP6 and MySQL Bible. Pdf: application/pdf; charset=binary PHP6.pdf: application/octet-stream; charset=binary PHP and MySQL for Dummies SE. Pdf: application/pdf; charset=binary For example, I use abiword – which is a good tool – but it converts any format. It doesn't check for valid documents: abiword --to=txt --to-name=output.txt audio.mp3 Is there any command available to check for valid documents then?

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• How to make a redundant desktop system with daily snapshots? (Is btrfs ready for use?)

  - by TestUser16418

  I want to configure a desktop system in which the home filesystem would be redundant (e.g. RAID-1), and would have weekly snapshots taken. I've already done this with ZFS, the snapshot system is wonderful, and with send/recv you can easily create backups on external media. Unfortunately, at that point, I want GNU+Linux and not FreeBSD or Solaris, so I'm looking for suggestions for good alternatives. I reckon that my alternatives are: btrfs - it seems to be exactly what I need, it has snapshots and commands that allow you to easily replicate zfs send. Yet all documentation mentions that it's still experimental. I can't seem to find any actual reports on its reliability or usability issues. Can you point me to any information on that issue that could clarify whether it would be a possible choice? I have a large preference for this option, mostly because I don't want to reformat the drives when btrfs becomes ready, but I there's no information on whether it's usable at all, whether it's a silly idea to use it, etc. The question that I cannot get the answer to is what does "experimental" mean. lvm snapshots and ext4 - preferably not, since it can consume an awful amount of space when new files are created. Creating 200 GB files requres 200 GB free space and 200 GB additionally for snapshots. I also have found it unreliable -- failed metadata rewrite results in an unreadable PV. I'm wondering how btrfs would compare here. A single filesystem (ext4) on a RAID-1 array with custom COW snapshots with hardlinks (like cp -al). That's my current preference if I can't use btrfs. So how experimental btrfs is, which should I choose, and do I have any other options? What if I don't keep external incremental backups, would that affect my choice?

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• Strange Domain name under the same IP Address

  - by Mike Chip

  There's something really weird happening in my server. But first things first: I wanted to have my website and chose the domain name "myowndomain.com", Now on my domain registrar I point "myowndomain.com" to the address of my recently setup VPS, let's say 50.50.50.50 So I installed everything I needed to run my website, and I started to notice strange queries coming from different IP Addresses. Like these [client 123.123.123.123] File does not exist: /var/www/html/api, referer: http://www.strangedomain.com/api/manyou/my.php [client 456.456.456.456] File does not exist: /var/www/html/api, referer: http://www.strangedomain.com/api/manyou/my.php or like this (Really a long line, I cut some things) GET /?s=vod-show-id-22-area-%E5%85%B6%E4%BB%96-language-%E9%9F%A9%E8%AF%AD.html HTTP/1.1" 301 295 "http://v.strangedomain.com/?s=vod-s ...[cut]... spider" That above is happening the most. The 'strangedomain.com' returns the same IP address of my VPS which my website is hosted on. The whois of such domain shows it's registered to a chinese. But the street name didn't look so right (like a huge single word), so I think all of that info might be fake, but still might be a chinese. I also noticed that all 'clients' trying to access the 'strangedomain.com' is coming from china. If I type in the browser 'strangedomain.com', I see my website. I'm worried, because my website is actually an e-commerce. I don't know if 'strangedomain.com' WAS a website on 50.50.50.50 in the not so far past, or if it's something else.

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• How to backup Servers to an SSH-Host with low traffic and access to versions and encryption?

  - by leto

  Hello, I've not run backups for the past dont't remember anymore years for my personal stuff until waking up lately and realising contrary to my prior belief: Actually. I care! :) Now I have a central data server at home where I want to attach an external media to, to which I want to save backups of my most important stuff, like years of self-written scripts, database dumps, you name it. I've tinkered with rsync+ssh over the last two years, also tried tar over ssh, but don't know the simplest and most easy to maintain way to do it yet. Heres my workload: A typical LAMP-Server (<5GB Data) which I'd like to backup fully so lots of small files connected via 10Mbit My personal stuff (<750GB Data) from a Mac connected via GE My passwords in an encrypted container (100Mb) from OpenBSD connected via serial-PPP My E-Mail from the last ten years (<25GB) as Maildir which I need to keep in readable format Some archives (tar.*) which I need to backup only once and keep in readable format (Deleted my ideas, as I'm here for suggestions) What I need: 1. Use an ssh-tunnel for data transfer 2. Be quick with lots of small files 3. Keep revisions 4. Be sure the data I save is not corrupted 5. Intelligent resume functions and be able to deal with network congestion :) 6. Compressed and optionally encrypted storage 7. Be able to extract data from backup easily (filesystem like usage would be nice) How would and with what software would you backup this stuff? Hints to tools that can help solve only part of my problem (like encryption) also greatly appreciated. Greets

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• error while resolving DNS requires

  - by user2803887

  I followed this document to configure master-slave powerdns servers... http://linuxmanage.com/master-slave-powerdns-managed-by-poweradmin.html Installation completed perfectly no errors even I feel DNS is trying to resolve some queries and parameter.. but while going through intodns.com i get below error for domain names which i have created in powerdns name server installed as above guide. Error Mismatched NS records WARNING: One or more of your nameservers did not return any of your NS records. Error Multiple Nameservers ERROR: Looks like you have less than 2 nameservers. According to RFC2182 section 5 you must have at least 3 nameservers, and no more than 7. Having 2 nameservers is also ok by me. Error Missing nameservers You should already know that your NS records at your reported by your nameservers are missing, so here it is again: nameservers ns1.makeittiny.com. ns2.makeittiny.com. I am much new to powerdns so not able to figure out where problem.. i check all things but not able to make out where problem remains.

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• Understanding MySQL Query Caches and when to implement it?

  - by Jeff

  On our current MySQL server query cache is enabled. Qchache_hits: 31913 Qchache_inserts: 50959 Qchache_lowmem_prunes: 9320 Qchache_not_chached: 209320 Qchache_queries_in_chace: 986 com_update: 0 com_delete: 0 I do not fully understand the Query cache - I am reading about it currently and trying to understand it. Our database holds inventory data, customer data, employee data, sales data and so forth. The query is very rarely run more than once. The possibility of a query being run twice is viewing a specific sales information twice. But basically everything in our system changes constantly. It is always being updated, deleted, insterted and off the top of my head I can't picture users running the same query twice within a week. Do I even need to have the query cache enabled? I am guessing that the inserts means 51k entries have been added, but only 986 of those are being stored? Would an idea be to refresh the cache, and watch it for a week and check how many of the queries in cached are accessed maybe on a weekly basis to see if it is actually returning any benefits? Any help/guidance on this is appreciated, thanks

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• USB Diskdrive cannot be formatted nor accessed

  - by Dmolish

  So I have just recently bought and 8GB USB stick(Kingston DT 100 G2) on which I had installed Linux. However I needed to reinstall said Linux so I formatted the stick to "default" settings which includes FAT32 filesystem. Later when the install process kept getting errors, I got advice that the problem might be with the FAT filesystem. I decided to try and format the stick to NTSF (format G:/fs:ntsf) but the formatting failed and the drive broke down. And with breaking down I mean you cannot access the drive anymore and when you plug it in Windows asks if I want to format the drive but despite my will the format always fails. To fix this I tried changing it back to FAT32 (format G:/fs:fat32), but i get "Error in IOCTL-call". Second thing I tried was trying to reset the filesystem with some 3rd party application like HP USB Disk Storage Format Tool. But the programs didn´t regocnize any media on the drive. So now I´m in the situation that I haven´t got any idea on what to do next. Is the drive recoverable or did I just create a piece of waste metal.

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• Windows 7 Sharing issue on RAID 5 Array(s)

  - by K.A.I.N

  Greetings all, I'm having a very odd error with a windows 7 ultimate x64 system. The network system setup is as follows: 2x XP Pro 32 Bit machines 1x Vista ultimate x64 machine 2x Windows 7 x64 Ultimate machines all chained into 1x 16 port netgear prosafe gigabit switch, the windows 7 & vista machines are duplexed. Also there is a router (netgear Rangemax) chained off the switch I am basically using one of the windows 7 machines to host storage & stream media to other machines. To this end i have put 2x 3tb hardware RAID 5 arrays in it and assorted other spare disks which i have shared the roots of. The unusual problems start when i am getting Access denied, Please contact administrator for permission blah blah blah when trying to access both of the RAID 5 arrays but not the other stand alones. I have checked the permission settings, i have added everyone to the read permission for the root, i have tried moving things into sub directories then sharing them. I have tried various setting combinations in HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa and always the same. I have tried flushing caches all round, disabling and re-enabling shares & sharing after restart as well as several other things & the result is always the same... No problem on individual drives but access denied on both the RAID arrays from both XP & Vista & Windows 7 machines. One interesting quirk that may lead to an answer is that there is no "offline status" information regarding the folders when you select the RAID 5s from a windows 7 machine yet there is on the normal drives which say they are online. It is as if the raid is present but turned off or spun down but as far as i was aware windows will spin an array back up on network request and on the machine itself the drives seem to be online and can be accessed. Have to admit this has me stumped. Any suggestions anyone? Thanks in advance for any fellow geek assistance. K.A.I.N

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• Suggestions for transitioning to new GW/private network

  - by Quinten

  I am replacing a private T1 link with a new firewall device with an ipsec tunnel for a branch office. I am trying to figure out the right way to transition folks at the new site over to the new connection, so that they default to using the much faster tunnel. Existing network: 192.168.254.0/24, gw 192.168.254.253 (Cisco router plugged in to private t1) Test network I have been using with ipsec tunnel: 192.168.1.0/24, gw 192.168.1.1 (pfsense fw plugged in to public internet), also plugged in to same switch as the old network. There are probably ~20-30 network devices in the existing subnet, about 5 with static IPs. The remote endpoint is already the firewall--I can't set up redundant links to the existing subnet. In other words, as soon as I change the tunnel configuration to point to 192.168.254.0/24, all devices in the existing subnet will stop working because they point to the wrong gateway. I'd like some ability to do this slowly--such that I can move over a few clients and verify the stability of the new link before moving critical services or less tolerant users over. What's the right way to do this? Change the netmask on all of the devices to /16, and update gateway to point to the new device? Could this cause any problems? Also, how should I handle DNS? The pfsense box is not aware of my Active Directory environment. But if I change DNS to use the local servers, it will result in a huge slowdown as DNS queries will still be routed over the private t1. I need some help coming up with a plan that's not too disruptive but will really let me thoroughly test the stability of the IPSEC tunnel before I make the final switch. The AD version is 2008R2, as are the servers. Workstations are mostly Windows XP SP3. I have not configured the 192.168.1.0/24 as a site in AD sites and services.

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• SQL Server 2012 memory usage steadily growing

  - by pgmo

  I am very worried about the SQL Server 2012 Express instance on which my database is running: the SQL Server process memory usage is growing steadily (1.5GB after only 2 days working). The database is made of seven tables, each having a bigint primary key (Identity) and at least one non-unique index with some included columns to serve the majority of incoming queries. An external application is calling via Microsoft OLE DB some stored procedures, each of which do some calculations using intermediate temporary tables and/or table variables and finally do an upsert (UPDATE....IF @@ROWCOUNT=0 INSERT.....) - I never DROP those temporary tables explicitly: the frequency of those calls is about 100 calls every 5 seconds (I saw that the DLL used by the external application open a connection to SQL Server, do the call and then close the connection for each and every call). The database files are organized in only one filgegroup, recovery type is set to simple. Some questions to diagnose the problem: is that steadily growing memory normal? did I do any mistake in database design which probably lead to this behaviour? (no explicit temp-table drop, filegroup organization, etc) can SQL Server manage such a stored procedure call rate (100 calls every 5 seconds, i.e. 100 upsert every 5 seconds, beyond intermediate calculations)? do the continuous "open connection/do sp call/close connection" pattern disturb SQL Server? is it possible to diagnose what is causing such a memory usage? Perhaps queues of wating requests? (I ran sp_who2, but I didn't see a big amount of orphan connections from the external application) if I restrict the amount of memory which SQL Server is allowed to use, may I sooner or later get into trouble?

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• Using Openfire for distributed XMPP-based video-chat

  - by Yitzhak

  I have been tasked with setting up a distributed video-chat system built on XMPP. Currently my setup looks like this: Openfire (XMPP server) + JingleNodes plugin for video chat OpenLDAP (LDAP server) for storing user information and allowing directory queries Kerberos server for authentication and passwords In testing with one set of machines (i.e. only three), everything works as expected: I can log in to Openfire and it looks up the user information in the OpenLDAP database, which in turn authenticates my user with Kerberos. Now, I want to have several clusters, so that there is a cluster on each continent. A typical cluster will probably contain 2-5 servers. Users logging in will be directed to the closest cluster based on geographical location. Something that concerns me particularly is the dynamic maintenance of contact lists. If a user is using a machine in Asia, for example, how would contact lists be updated around the world to reflect the current server he is using? How would that work with LDAP? Specific questions: How do I direct users based on geographical location? What is the best architecture for a cluster? -- would all traffic need to come into a load-balancer on each one, for example? How do I manage the update of contact lists across all these servers? In general, how do I go about setting this up? What are the pitfalls in doing this? I am inexperienced in this area, so any advice and suggestions would be appreciated.

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• What's Keeping My Computer Awake?

  - by phantomdata

  Hey guys, First the question; How do I figure out what is preventing my Windows 7 computer from going into sleep mode? Second; some background... I've been struggling with this for a few days and am utterly perplexed. I setup sleep mode on my Windows 7 PC a few weeks ago, and all was well. The PC would sleep as expected and I was snuggly in knowing that my computer was saving power and some wear and tear on the components (we'll leave the 'is it better to sleep' debate for another thread/day, please don't start it). Well, I noticed the other night that my system stopped ever going to sleep. I set the sleep time down to 1 minute and wandered fully away from the PC (ensuring that no errant mouse or keyboard movements would occur) and the PC never went to sleep. I've also observed this over longer intervals as well, such as overnight. I have sleep mode enabled, of course "multimedia settings - When Sharing Media" is set to allow the computer to sleep. "powercfg -lastwake" show nothing of interest, since it never goes to sleep and can't wake up. "powercfg /requests" shows 3 entries - all "[DRIVER] ?". I assume that 2 of these are my mouse and keyboard - as I've recently used them to run the powercfg command. I'm at a loss for the third though. I've unhooked all USB peripherals save for my keyboard and mouse. Wake on LAN is disabled in my BIOS. I know that you can disable all apps from waking/preventing sleep - but I want the ability to remain for those apps that do legitimately need to keep the system awake. So; does anyone know of a way to figure out what the 3rd phantom "[DRIVER] ?" is in powercfg /requests?

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• Touchpad scroll slow and jumpy

  - by IR

  I have a laptop with a synaptics touchpad running on win7 x64. When i use the scrolling region of the touchpad in some applications, for example in Visual Studio 2008, Notepad and Windows Media Player 12, the scroll is very slow. If i pull the edge of the touchpad slowly the program will scroll one row at a time(regardless of the number of lines-settings in the mouse configuration). If i pull the edge quickly though, the program will instantly jump like 20 rows making it way too fast. In some applications, like Firefox, the scrolling work as expected. Changing the scrollspeed-setting for the touchpad does not help. If you make it slower it doesn't do the 20-row jump but then it's horribly slow and if you try to make it faster it will do the jumps all the time. I have tried both synaptics generic drivers and the "special" drivers that HP provides but they both have the same problem (except that the generic one can't adjust the scrolling speed, even though that didn't help anyway). With windows generic drivers the scrolling region doesn't even work. Other mice i've tried with scrollwheel work as they should do.

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• Join multiple consecutive SQLite database dump files into 1 common database? Purpose: Search through ENTIRE Chrome Browsing History

  - by porg

  Google Chrome 's default web browsing history search engine only lets you access the records of the recent 100 days. Nevertheless in your application data, Chrome keeps your entire browsing history in SQLite database files, with the file naming scheme of "History Index YYYY-MM". I am looking for a way to search… …through my entire browsing history, …with sophisticated filters (limit search terms to certain fields such as URL, domain, title, body text; wildcard or regex terms, date ranges). … in … …either some ready-made software. eHistory came close, as it can limit terms to fields, but it lacks wildcards/regexes, and has the same limited time horizon as the default search. Beyond that, I could not find any suited Chrome extension or standalone (Mac) app. …or a command line to join multiple SQLite database files into one database, which I can then query (with the full syntax power). In the spirit of the pseudo code below: Preferred this way: sqlite --targetDatabase ChromeHistoryAll --importFiles /path/to/ChromeAppData/History\ Index* --importOnlyYetUnknownFiles Or if my desired feature --importOnlyYetUnknownFiles is not possible (feature could also be called "avoid duplicate imports by checking UIDs"), then by explicitly only importing files, of which I know, that they have yet not been imported into the ChromeHistoryAll database: cd ChromeAppData; sqlite --databaseTarget ChromeHistoryAll --importFiles YetNotImported1 YetNotImported2 YetNotImported3 All my queries I would then perform in the database "ChromeHistoryAll" P.S.: Additional question of general interest: Is there a way to perform a database query in a temporary database which was created on-the-fly from multiple files? Like: sqlite --query="SQL query" --targetDatabase DbAll --DBtemporaryInRAM --importFiles db1 db2 db3 This is surely not applicable for my Chrome question, as these History Index files have a combined file size of 500MB together, thus such a query would be of bad performance. But it could come handy in other situations.

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• Linux Has Become Very Slow Dealing With Large Data

  - by Kohjah Breese

  Last year I bought a computer, for around $1,800, so it is relatively high-end. When I first got it I was particularly pleased at how quick it dealt with large MySQL queries, imports and exports. But somewhere along the way something has gone wrong and I am not sure how to diagnose the problem. Any job that involves processing large amounts of data, e.g. gzipping file c. 1GB+, UPDATEs on large MySQL tables etc. have become very slow. I just performed an intensive alter statement on a 240,000,000 row table on a remote server, which is lower spec. This took about 10 minutes. However, performing the same query on a 167,000,000 row table on my computer went fine until it hit 860MB. Now it is only writing about 1MB every 15 seconds. Does anyone have any advice as to debugging what the issue is? I am using LinuxMint (based on Ubuntu 12.04.) The home partition is encrypted, which really slows down gzip. I have noticed the swap is barely used, but am not sure if that is because there is more than enough RAM. The filesystem is ext4. The MySQL server is on a separate hard drive, but it was fine when I first installed it. Other than the above issues, there are no other problems with it. I am going to install a fresh Ubuntu on the 4th hard drive to see if that is any different.

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• where is my disk space?

  - by user166241

  I recently had a problem with .xsession-errors file - it became very big ( 90GB) and took all disk space: How I can check what takes disk space in /tmp?. I cleaned it with command > .xsession-errors but after an hour it became large again. So I deleted it (rm .xsession-errors) - it helped because it wasn't recreated but again after hour disk space disappeared - now there is no .xsession-errors anymore but I don't know where is the memory: df Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda1 106640456 101223392 4 100% / udev 8166744 8 8166736 1% /dev tmpfs 3270224 972 3269252 1% /run none 5120 0 5120 0% /run/lock none 8175552 152 8175400 1% /run/shm du -sc * .[^.]* | sort -n 0 initrd.img 0 initrd.img.old 0 proc 0 sys 0 vmlinuz 0 vmlinuz.old 4 cdrom 4 lib64 4 media 4 mnt 4 selinux 8 dev 12 srv 16 lost+found 68 tmp 1124 run 3396 lib32 5164 .rpmdb 5540 root 8888 sbin 9120 bin 17132 etc 106080 opt 116956 boot 861908 lib 3530584 usr 3821836 var 13371260 home 21859112 total So there is around 100GB used but executing du -sc * .[^.]* | sort -n in root directory finds only ~21 GB - so what takes 80GB?? How to check it? I suspect that when I deleted the `.xsession-errors' file the errors were redirected somwhere else - but where?

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• How to run a restricted set of programs with Administrator privileges without giving up Admin acces (Win7 Pro)

  - by frLich

  I have a shared system, running Windows7 X64, restricted to a 'standard user' with no password. Not everyone who has access to the system has the administrator password. This works rather well, except for some applications - specially the unlock-applications for encrypted hard drives/USB flash drives. The specific ones either require Administrator access (eg. Seagate Blackarmor) or simply fail without it -- since these programs are sending raw commands to a device, this is to be expected. I would like to be able to add the hashes of these particular programs to a whitelist, and have them run as administrator without needing any prompts. Since these are by definition on removable media, I can't simply use a filename or even a path. One of the users who shares the system can be considered 'crafty', so anything which temporarily grants administrator rights to an user account is certain to cause problems. What i'd like to be able to do: 1) Create an admin account that can only run programs from a whitelist (or, failing that, from a directory) I can't find a good way to do this: As far as I can tell, SRP applies equally to ALL users? Even if I put a "Deny" token on all directories on the system, such that new directories would inherit it, it could still potentially run things from the mounted USB devices. I also don't know whether it's possible to create a new directory that DOESN'T inherit from the parent, that would lake the deny token, and provide admin access. 2) Find a lightweight service that will run these programs in its local context Windows7 seems to block cross-privilege level communication by default, and I haven't found such for windows 7. One example seems to be "sudo" (http://pages.cpsc.ucalgary.ca/~nfriess/sudo/) but because it uses a WLNOTIFY hook, it won't work under Vista nor Windows7 Non-Solutions: - RunAs: Requires administrator password! (but everyone calls it "sudo" anyway) - SuRun: From Google: "Surun uses its own Windows service that adds the user to the group of administrators during program start and removes him automatically from that group again"

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• Older monitor not working with HDMI to DVI cable (from ultrabook)

  - by ShellfishGene

  I have a Lenovo Yoga ultrabook which only has a HDMI port. I bought an HDMI to DVI cable, and it works as expected with a LG monitor in my office. As soon as I plug it in the screen is cloned. At home I have an older Dell UltraSharp 2005fp, and for that one it does not work. When I plug the cable in "something" happens, the monitor goes from the "no signal" screen to black. On the laptop however nothing happens. In the Windows 8 display setup I don't have another monitor, clicking "detect" does not find one either. I can manually set a second display for cloning or extending, but never get a picture on the Dell. Connecting my media player thing with the cable to the Dell monitor works for when the player displays it's logo at a low resolution, but when it goes into 750p mode after booting the picture also goes away. Mabye that's due to HDCP though. Any ideas? Something to do with Windows 8, or DVI versions?

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• Apache mod_disk_cache on a seperate drive

  - by pavs

  how can I set Apache mod_disk_cache on a separate drive from where the OS/Apache is installed? I have set up this on my apache2.conf: <IfModule mod_cache_disk.c> # cache cleaning is done by htcacheclean, which can be configured in # /etc/default/apache2 # # For further information, see the comments in that file, # /usr/share/doc/apache2/README.Debian, and the htcacheclean(8) # man page. # This path must be the same as the one in /etc/default/apache2 CacheRoot /media/cacheHD # This will also cache local documents. It usually makes more sense to # put this into the configuration for just one virtual host. CacheEnable disk / # The result of CacheDirLevels * CacheDirLength must not be higher than # 20. Moreover, pay attention on file system limits. Some file systems # do not support more than a certain number of inodes and # subdirectories (e.g. 32000 for ext3) CacheDirLevels 2 CacheDirLength 1 </IfModule> and it doesn't seem to be caching anything at all. The drive itself is a freshly installed ssd drive formatted with ext4.

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• Which would be more reliable for data archival - SD card or a generic USB thumbdrive?

  - by Visitor

  I've been thinking lately what should I preferably use for data storage and archival. I will say in advance that I do not use flash memory as the only storage media - I also keep my data on the hard drives and optical disks - flash memory is but one of the several backup solutions that duplicate each other. For the flash memory however I do have a choice - to use a generic USB thumbdrive or a SD card. Are there any indications that SD cards may be better and more reliable? From browsing people's review on the web I see that many complaints about USB sticks have to do with them completely failing, losing file system and stop being recognized by the OS. At the same time, most of the complaints for SD cards deal with just write speeds not holding up to the promise - failure reports are but a portions of those for the USB sticks. Are SD cards indeed more reliable? Am I also correct in my assumptions that SD cards use higher grade NAND chips than USB thumbdrives? At least, for class 10 cards, because the specification dictates the minimum performance and the manufacturers have to preselect better chips. While it is common for USB sticks to promise high speeds "up to XX MB/sec" but the reality is they very often deliver speeds 2-3 times less than promised. Do SD cards get better NAND chips and USB thumbdrives receive the discarded chips? Any thoughts would be appreciated.

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• Building a small server farm

  - by RayQuang

  Hi, I am planning to set up a Tech startup company that will provide web application solutions. Eventually we hope to diversify into different areas such as possibly social media or other services. For now we plan on running a high demand (from 1000 to 10,000 users in the first year) website running the application. This includes a MySQL database backend, email, and development servers. My question is then, what type of server arrangement will work best, that is ti say should i have a small cluster of ultra high power machines (E.G. Top of the range Xeons, with 12GB RAM) or will it be better to have more less powerful servers load balanced? Should I go for 1 - 2 u servers rack mounted ot would it be beter for it just to be tower servers for maintainability? Finally I would also like to know what kind of Internet and router i would need, I currently have 10mbit down and barely 1 mbit up, but soon our area will have a fiber optic connection with international speeds of up to 25 mbit / sec. Thanks in advance, RayQuang UPDATE: sorry I forgot to mention it, the platform that I will be using is PHP with the APC code cache, Probably running Debian.

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• MySQL has stopped accepting connections from other users than root

  - by John

  Hi there. I'm running a mysql-server a long with apache and tomcat on a Gentoo box. To administer mysql I'm using phpMyAdmin. A couple of hours ago I received a call -- a user was unable to login to phpmyadmin. I logged on to phpmyadmin with the root user, and reset the password. The user was still not able to login. I then decided to give it a go myself, and even I wasn't able to login. I tried creating several user accounts, none of them were able to access mysql via jdbc/mysql-client/phpmyadmin. The only user that seems to work is root. What's even more strange is that websites that connect to mysql with a user other than root are still able to login and retrieve content from the database (it's mainly wordpress and a tomcat webapp). I have made sure it's not just cached, I was able to post SQL queries to the database via these web apps still. However, I am unable to login to phpmyadmin/mysql-client with this user and I am also unable to set up a connection with this user for any new web-applications. Any help is immensely appreciated.

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• Is it safe to format this partition?

  - by xanesis4

  On a ubuntu server I own, I am running out of space. When I ran sudo parted /dev/sda -l to find all available drives, I got this: Model: ATA ST31000528AS (scsi) Disk /dev/sda: 1000GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 1049kB 256MB 255MB primary ext2 boot 2 257MB 1000GB 1000GB extended 5 257MB 1000GB 1000GB logical lvm Model: Linux device-mapper (linear) (dm) Disk /dev/mapper/server--vg-swap_1: 2135MB Sector size (logical/physical): 512B/512B Partition Table: loop Number Start End Size File system Flags 1 0.00B 2135MB 2135MB linux-swap(v1) Model: Linux device-mapper (linear) (dm) Disk /dev/mapper/server--vg-root: 998GB Sector size (logical/physical): 512B/512B Partition Table: loop Number Start End Size File system Flags 1 0.00B 998GB 998GB ext4 I understand /dev/mapper/server--vg-root is the filesystem, and /dev/sda1 has some stuff related to GRUB. But, what about /dev/sda2 and /dev/sda5? When I tried to mount /dev/sda2, it said that I needed to specify the file system, which according to the table, is nonexistent. So, is it safe to format this with, say ext4 and mount it? Also, when I tried to mount /dev/sd5, it gave me this error: mount: unknown filesystem type 'LVM2_member' I assume it is NOT save to reformat this. If I'm wrong, then that would be great, because I could save some space. Please let me know either way. Thanks in advance! UPDATE: Here is the result of mount: /dev/mapper/server--vg-root on / type ext4 (rw,errors=remount-ro) proc on /proc type proc (rw,noexec,nosuid,nodev) sysfs on /sys type sysfs (rw,noexec,nosuid,nodev) none on /sys/fs/fuse/connections type fusectl (rw) none on /sys/kernel/debug type debugfs (rw) none on /sys/kernel/security type securityfs (rw) udev on /dev type devtmpfs (rw,mode=0755) devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620) tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755) none on /run/lock type tmpfs (rw,noexec,nosuid,nodev,size=5242880) none on /run/shm type tmpfs (rw,nosuid,nodev) /dev/sda1 on /boot type ext2 (rw,acl) /dev/sda1 on /media/hd2 type ext2 (rw)

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