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  • mounting ext4 fs with block size of 65536

    - by seaquest
    I am doing some benchmarking on EXT4 performance on Compact Flash media. I have created an ext4 fs with block size of 65536. however I can not mount it on ubuntu-10.10-netbook-i386. (it is already mounting ext4 fs with 4096 bytes of block sizes) According to my readings on ext4 it should allow such big block sized fs. I want to hear your comments. root@ubuntu:~# mkfs.ext4 -b 65536 /dev/sda3 Warning: blocksize 65536 not usable on most systems. mke2fs 1.41.12 (17-May-2010) mkfs.ext4: 65536-byte blocks too big for system (max 4096) Proceed anyway? (y,n) y Warning: 65536-byte blocks too big for system (max 4096), forced to continue Filesystem label= OS type: Linux Block size=65536 (log=6) Fragment size=65536 (log=6) Stride=0 blocks, Stripe width=0 blocks 19968 inodes, 19830 blocks 991 blocks (5.00%) reserved for the super user First data block=0 1 block group 65528 blocks per group, 65528 fragments per group 19968 inodes per group Writing inode tables: done Creating journal (1024 blocks): done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 37 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. root@ubuntu:~# tune2fs -l /dev/sda3 tune2fs 1.41.12 (17-May-2010) Filesystem volume name: <none> Last mounted on: <not available> Filesystem UUID: 4cf3f507-e7b4-463c-be11-5b408097099b Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal ext_attr resize_inode dir_index filetype extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize Filesystem flags: signed_directory_hash Default mount options: (none) Filesystem state: clean Errors behavior: Continue Filesystem OS type: Linux Inode count: 19968 Block count: 19830 Reserved block count: 991 Free blocks: 18720 Free inodes: 19957 First block: 0 Block size: 65536 Fragment size: 65536 Blocks per group: 65528 Fragments per group: 65528 Inodes per group: 19968 Inode blocks per group: 78 Flex block group size: 16 Filesystem created: Sat Feb 5 14:39:55 2011 Last mount time: n/a Last write time: Sat Feb 5 14:40:02 2011 Mount count: 0 Maximum mount count: 37 Last checked: Sat Feb 5 14:39:55 2011 Check interval: 15552000 (6 months) Next check after: Thu Aug 4 14:39:55 2011 Lifetime writes: 70 MB Reserved blocks uid: 0 (user root) Reserved blocks gid: 0 (group root) First inode: 11 Inode size: 256 Required extra isize: 28 Desired extra isize: 28 Journal inode: 8 Default directory hash: half_md4 Directory Hash Seed: afb5b570-9d47-4786-bad2-4aacb3b73516 Journal backup: inode blocks root@ubuntu:~# mount -t ext4 /dev/sda3 /mnt/ mount: wrong fs type, bad option, bad superblock on /dev/sda3, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so

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  • Compatiblity of 64 bit systems

    - by Bill
    I am running Windows Vista home premium 32bit on an Intel core2 duo E7300,which I believe is actually a processor capable of running 64bit.I also run Adobe photoshop CS5 which i believe could utilise the 64 bit processor and more ram.Could I change my operating system to 64bit and would I gain anything from doing so.

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  • Our VPS is being used as a Warez mule

    - by Mikuso
    The company I work for runs a series of ecommerce stores on a VPS. It's a WAMP stack, 50gb storage. We use an archaic piece of ecommerce software which operates almost entirely client-side. When an order is taken, it writes it to disk and then we schedule a task to download the orders once every 10 minutes. A few days ago, we ran out of disk space, which caused orders to fail to be written. I quickly hopped on to delete some old logs from the mailserver and freed up a couple of GB pretty quickly, but I wondered how we could fill up 50gb will nothing much more than logs. Turns out, we didn't. Hidden deep within the c:\System Volume Information directory, we have a stack of pirated videos, which seem to have appeared (looking at the timestamps) over the past three weeks. Porn, American Sports, Australian cooking shows. A very odd collection. Doesn't look like an individual's personal tastes - more like the VPS is being used as a mule. We have a 5-attempts and you're blocked policy on our FTP server (plus, there is no FTP account with access to that directory), and the windows user account has had it's password changed recently. The main avenues are sealed - and logs can verify that. I thought I'd watch and see if it happened again, and yes, another cooking show has appeared this morning. I am the only one to know of this problem at my company, and only one of two with access to the VPS (the other being my boss, but no - it's not him). So how is this happening? Is there a vulnerability in some of the software on the VPS? Are the VPS owners peddling warez across our rented space? (can they do this?) I don't want to delete the warez in case it is seen as a hostile action against this outside force, and they choose to retaliate. What should I do? How do I troubleshoot this? Has this happened to anyone else before?

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  • Intermittently, IIS7 requests get stuck in WindowsAuthenticationModule

    - by Richard Beier
    We're running an IIS7 server hosting several dozen websites. Several of these websites are all part of the same legacy app we've developed. These sites all run the same code and run in the same app pool. Roughly once a month over the past few months, we've found that all requests for this app pool start hanging indefinitely. When this happens, we receive an alert and we recycle the app pool. After that, the sites start working again. This only ever affects this one app pool - never any others on the same server. A couple times, before recycling the pool, I've looked at the currently-executing requests in the worker process. They all show up as executing inside the WindowsAuthenticationModule. Which is strange, because the vast majority of the application does not require authentication. There is a small admin section which uses Windows auth... but all the other requests should be anonymous. Does anyone have any idea as to what might be causing this? There are several unusual things about the way these sites are set up. As I mentioned, they all run the same code - multiple sites point at the same physical directory. The only difference is the host header bindings. I'm not sure why there isn't just one site with all the host headers, but that's how it works. In several of these sites, the same physical directory is mapped at two levels - as the root of the site and again as an application within the site. So if a user goes to http://oursite.com/index.aspx, that maps to c:\files\oursite\index.aspx. If a user goes to http://oursite.com/foo/index.aspx, that also maps to c:\files\oursite\index.aspx. I think there is code which looks at the request URL and handles the two requests differently. This is strange because the same web.config ends up being interpreted as a site config file, and also as an application config file within the site. I don't know if this might be related to the authentication problem. If we can't find the cause, we're thinking of a few workarounds we could try: Move the admin section into a separate site, and give the client a new admin URL. Run that separate site in its own app pool. Then in the web.config shared by all the other sites, remove the WindowsAuthenticationModule. That way there should be no possibility of a hang within the WindowsAuthenticationModule. Try running all these sites in the classic pipeline instead of the integrated pipeline. They were working fine on our old IIS6 server... (If we get desperate) Set up a watchdog script which monitors the sites and auto-recycles the app pool when it detects that requests are getting stuck. What do you think? Thanks for your help, Richard

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  • Acer Aspire One AOA 150 netbook health monitoring software

    - by iceman
    I have a Acer Aspire One AOA 150 with Windows Xp Home. I want to monitor the voltages from the power supply, the temperature of the system, the CPU and fan speeds. Much like the functionality of GKrellM(though I haven't used this on the netbook yet) , a GTK applet designed to make an impressive panel of monitors or xsensors in Linux. Is this possible with the netbook? I want a software for Windows 7 and Windows Xp.

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  • High I/O latency with software RAID, LUKS encrypted and LVM partitioned KVM setup

    - by aef
    I found out a performance problems with a Mumble server, which I described in a previous question are caused by an I/O latency problem of unknown origin. As I have no idea what is causing this and how to further debug it, I'm asking for your ideas on the topic. I'm running a Hetzner EX4S root server as KVM hypervisor. The server is running Debian Wheezy Beta 4 and KVM virtualisation is utilized through LibVirt. The server has two different 3TB hard drives as one of the hard drives was replaced after S.M.A.R.T. errors were reported. The first hard disk is a Seagate Barracuda XT ST33000651AS (512 bytes logical, 4096 bytes physical sector size), the other one a Seagate Barracuda 7200.14 (AF) ST3000DM001-9YN166 (512 bytes logical and physical sector size). There are two Linux software RAID1 devices. One for the unencrypted boot partition and one as container for the encrypted rest, using both hard drives. Inside the latter RAID device lies an AES encrypted LUKS container. Inside the LUKS container there is a LVM physical volume. The hypervisor's VFS is split on three logical volumes on the described LVM physical volume: one for /, one for /home and one for swap. Here is a diagram of the block device configuration stack: sda (Physical HDD) - md0 (RAID1) - md1 (RAID1) sdb (Physical HDD) - md0 (RAID1) - md1 (RAID1) md0 (Boot RAID) - ext4 (/boot) md1 (Data RAID) - LUKS container - LVM Physical volume - LVM volume hypervisor-root - LVM volume hypervisor-home - LVM volume hypervisor-swap - … (Virtual machine volumes) The guest systems (virtual machines) are mostly running Debian Wheezy Beta 4 too. We have one additional Ubuntu Precise instance. They get their block devices from the LVM physical volume, too. The volumes are accessed through Virtio drivers in native writethrough mode. The IO scheduler (elevator) on both the hypervisor and the guest system is set to deadline instead of the default cfs as that happened to be the most performant setup according to our bonnie++ test series. The I/O latency problem is experienced not only inside the guest systems but is also affecting services running on the hypervisor system itself. The setup seems complex, but I'm sure that not the basic structure causes the latency problems, as my previous server ran four years with almost the same basic setup, without any of the performance problems. On the old setup the following things were different: Debian Lenny was the OS for both hypervisor and almost all guests Xen software virtualisation (therefore no Virtio, also) no LibVirt management Different hard drives, each 1.5TB in size (one of them was a Seagate Barracuda 7200.11 ST31500341AS, the other one I can't tell anymore) We had no IPv6 connectivity Neither in the hypervisor nor in guests we had noticable I/O latency problems According the the datasheets, the current hard drives and the one of the old machine have an average latency of 4.12ms.

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  • What is chroot in proftpd

    - by Saif Bechan
    I am using proftpd and on every login I get the following message: Apr 4 08:26:23 mydomain proftpd[4240]: mydomain.com (xxx.xxx.xxx.xxx[xxx.xxx.xxx.xxx]) - FTP session opened. Apr 4 08:26:23 mydomain proftpd[4240]: mydomain.com (xxx.xxx.xxx.xxx[xxx.xxx.xxx.xxx]) - Preparing to chroot to directory 'path-to/domain' Can anyone explaom to me what this means. Everything works fine however, the are no other messages except for these 2.

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  • Get an object by its objectGUID using ldapsearch

    - by orsogufo
    If I have the objectGUID attribute as returned by the ldapsearch command, how can I search the whole directory for an object with that objectGUID? For example, if I search a user getting its objectGUID, I get the following: ldapsearch -x -D $MyDn -W -h $Host -b "dc=x,dc=y" "(mail=something)" objectGUID # 7f435ae312a0d8197605, p, Externals, x.y dn: CN=7f435ae312a0d8197605,OU=p,DC=x,DC=y objectGUID:: b+bSezFkKkWDmbIZiyE5rg== Starting from the value b+bSezFkKkWDmbIZiyE5rg==, how can I create a query string to get that object?

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  • iptables not writing rules.

    - by Darkmage
    im running these two rules as root, but when doing a iptables -L it dosent show any rules, any one have an idea of what the problem can be? iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 80 --source 84.244.145.135 -j REDIRECT --to-port 1222 iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 80 --source 243.134.97.194 -j REDIRECT --to-port 1222 duno@Virtual-Box:/home/glennwiz# iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination

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  • Internet Speed for Webserver

    - by René
    That should be kind of dumb question in comparison to all other questions here. What minimum upload and download is required for a small home webserver with one webpage? Or is there a schema that shows me the required upload and download speed for a number of visitors? We talk about a Windows Server, but not really sure this is relevant. That's just for a practice project.

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  • How do I create a symbolic link to a UNC Path in Windows XP

    - by Sebas
    I have a workstation with Windows XP and I need to make a symbolic link or mount a UNC Path like a local Drive. I need the same behavior that produces M-Daemon tools when you mount an .iso File but with a remote directory. This is because I have a software client that perform several task but only with local drives and directorys. The remote UNC path is a NAS server, thats the why I need to perform all the tasks from a workstations.

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  • Trying to setup a PHP daemon using System_Daemon and I'm having issues getting it to run.

    - by yummm
    I get the following error when trying to start a daemon using Ubuntu 10.04 and the PHP5: PHP Warning: PHP Startup: Unable to load dynamic library 'usr/lib/php5/20060613/pcntl.so' - /usr/lib/php5/20060613/pcntl.so: cannot open shared object file: No such file or directory in Unknown on line 0 Does System_Daemon try to call pcntl? If so, why is it looking for the file where it does not exist?

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  • ASP.NET application within wordpress installation on IIS 7

    - by fro
    Hi all, a client has a wordpress installation on their IIS server located at www.mydomain.com. We would like to put our asp.net application in a subdirectory of the wordpress installation - at something like mydomain.com/asp. When I navigate to that directory I get a standard wordpress "Page not found" error. I am more familiar with htaccess, so how would I get wordpress to ignore a subdirectory in IIS? Thanks!

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  • where is the best place to store portable apps in Windows 7

    - by CoreyH
    I have a number of small portable apps and utilities. Where does Microsoft recommend we keep these? Lots of installed apps install themselves into \users{username}\appdata\local but it doesn't make much sense for me to put stuff there myself. \program files\ doesn't seem right either because non admin users don't have write access there. Is it recommended to create a \users{username}\applications directory?

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  • Window 7 + SVN permission problem

    - by acidzombie24
    In tortoisesvn i get the error Can't create directory 'C:\dev\repo\subfolder\db\transactions\49-1g.txn': ... I used robocopy (i cant remember if i used /copyall) to copy the files onto an external drive then i copied it back after a format. Now ATM i cannot commit. How do i fix this?

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  • fcgid, suexec, and userdir

    - by Martin v. Löwis
    I'm trying to set up per-user trac instances, using fcgid. The problem is that trac requires rw access to the trac instance, so I need the fcgi process to run under the respective user. I have the suexec, fcgid, and userdir Apache modules installed (on Debian). I put up vhost directive ScriptAliasMatch /~(.*)/trac /home/$1/public_html/trac.fcgi This works insofar as trac.fcgi is run, but unfortunately, under the www-data user. How can I make fcgid launch it under the $1 user?

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  • MySQL keeps adding additional user without rights from specific IP

    - by Niels B.
    I'm running MySQL Server 5.5.29 on Ubuntu Server 13.04 I have a created a user with a wildcard host access % and given him various privileges. However, whenever this user connects from 194.182.245.61, a new user account is created for that specific IP address with no rights and he is unable to exercise his privileges. When he connects from other internet connections, such as his home IP, it works just as it should. Why does this happen and how can I stop it from happening?

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  • Address book software that knows people share addresses

    - by Benjol
    I'm a bit frustrated with Outlook and Google contacts, as neither understand that people share addresses, or that one address can represent several people. So you either have crappy custom fields like "Bill's mobile", "Jane's mobile", or you have a Bill and a Jane contact, and you have to keep the address updated between the two. Are the any decent, and simple, address book applications out there which have this kind of intelligence? Note: this is for home use, I don't need to do professional 'contact management'.

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  • How to run multiple Linux installations on a single VirtualBox?

    - by NoCatharsis
    I just started playing with VirtualBox to check out different versions of Linux. I was wondering if it would be possible (and recommended) to set up a single virtual machine with multiple partitions - one for each separate version of Linux, one for swap memory, and one fully shared /home partition? Still new to Linux, but I've read this is a good way to partition so you can share common applications between Linux installations, however I think everything I've read is pertaining to literal partitions and not virtual machines.

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  • How to find out Vim's currently mapped commandos

    - by Boldewyn
    I'm using Vim under Debian, Win Vista and WinXP (the latter two with Cygwin). To handle tabs more easily, I mapped <C-Left> and <C-Right> to :tab(prev|next). This mapping works like a charm on the Debian machine. On the Windows machines, however, pressing <C-Left> deletes 5 lines, as far as I can tell, and meddles with cursor position, while <C-Right> does this, too, and additionally enters Insert mode. Question: To put it in a nutshell, how can I find out, why Vim behaves as it does? Is there a way to backtrace the active commands and keystrokes? Could there be a plugin the culprit? (I didn't install one, perhaps a default include by the Cygwin distro...) If so, how can I find it? Additional Diagnosis: This behaviour occurs regardless of any existing ~/.vimrc file (is therefore not related to my above mentioned mapings) and is not inherited of some /etc/vim/vimrc, since this doesn't exist in the default Cygwin installation. :verbose map doesn't yield any new insights. Either nothing or my mentioned mappings appear, based on the existence of the .vimrc file :help <C-Left> suggests, that the default would be a simple cursor movement, which is apparently not the case. Vim's version under Cygwin: VIM - Vi IMproved 7.2 (2008 Aug 9, compiled Feb 11 2010 17:36:58) Included patches: 1-264 Compiled by http://cygwin.com/ Huge version without GUI. Features included (+) or not (-): +arabic +autocmd -balloon_eval -browse ++builtin_terms +byte_offset +cindent -clientserver -clipboard +cmdline_compl +cmdline_hist +cmdline_info +comments +cryptv +cscope +cursorshape +dialog_con +diff +digraphs -dnd -ebcdic +emacs_tags +eval +ex_extra +extra_search +farsi +file_in_path +find_in_path +float +folding -footer +fork() -gettext -hangul_input +iconv +insert_expand +jumplist +keymap +langmap +libcall +linebreak +lispindent +listcmds +localmap +menu +mksession +modify_fname +mouse -mouseshape +mouse_dec -mouse_gpm -mouse_jsbterm +mouse_netterm -mouse_sysmouse +mouse_xterm +multi_byte +multi_lang -mzscheme -netbeans_intg -osfiletype +path_extra -perl +postscript +printer +profile -python +quickfix +reltime +rightleft -ruby +scrollbind +signs +smartindent -sniff +statusline -sun_workshop +syntax +tag_binary +tag_old_static -tag_any_white -tcl +terminfo +termresponse +textobjects +title -toolbar +user_commands +vertsplit +virtualedit +visual +visualextra +viminfo +vreplace +wildignore +wildmenu +windows +writebackup -X11 -xfontset -xim -xsmp -xterm_clipboard -xterm_save system vimrc file: "$VIM/vimrc" user vimrc file: "$HOME/.vimrc" user exrc file: "$HOME/.exrc" fall-back for $VIM: "/usr/share/vim" Compilation: gcc -c -I. -Iproto -DHAVE_CONFIG_H -g -O2 -D_FORTIFY_SOURCE=1 Linking: gcc -L/usr/local/lib -o vim.exe -lm -lncurses -liconv

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  • HD failure questions ...

    - by JP
    I recently had one of my home PC hard drives fail. It was in a striped raid, so I had to rebuild the raid (no data lost, only the OS partition was there). Is there any way to diagnose exactly what went wrong with the drive? That is what caused the failure? Also, in general, what is a good way to dispose of a failed hard drive securely and realistically (I don't have thermite or muriatic acid)?

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