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• VMWare Input/Output error on ubuntu host Win7 guest

  - by CShipley

  I am running ubuntu 10.10 as my host with Windows 7 as the guest. About a couple weeks ago I started getting error pop-ups from vmware reporting inability to read or write to a particular file. On futher investigation, I've noticed that I cannot copy that particular file from the linux command line even as root. I get the same input/output error. The SMART utility tells me I have 69 bad sectors on the disk (it is 1 TB) So my question is 1) How do I tell if that HD is going bad? 2) How can I move the VM files to a different part of the disk if I get read/write errors when I try to copy?

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• KDE Device Notifier and mounted volumes ownership and permissions

  - by nunomaltez

  Hi, When I plug an USB pen to my PC and mount the device using KDE's Device Notifier, the mounted device is owned by my user, who has write permissions. However, when I connect a USB harddisk and mount a partition in the same way, the mounted device is owned by root, and since the owner is the only one with write permissions I can't write to the disk. How do I configure the device notifier's actions to mount the HD with my user as owner, just like it mounts the USB pen? I'm using Fedora 9.

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• sync two huge filesystems

  - by guettli

  I need to sync two huge file systems. Both sides run linux with full root access. My preferred solution: I can read the list of changed files and directories and sync only the changed files. Here are some solutions and why they don't fit: rsync: Needs to check recursively all files. There are some million files and only little changes. The check takes too long. unison: the same: needs to check all files. inotify: I need a handler for every directory and there too many. Inotify was not build for "watch all files" scenarios. DRDB: Both sides should run independent.

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• New 64 bit linux system has regular processes (ps, grep etc) taking up way too much VIRT mem

  - by user42980

  We just moved from a 32-bit machine to a 64-bit machine. We have quickly ran out of memory despite the new boxes have twice as much ram as the old boxes. Running a simple ps command will illustrate the problem. New machine: 132 prod-Charlotte1-node1 ~/public_html/rearch/cgi-bin ps aux | grep ps root 293 0.0 0.0 0 0 ? S< May09 0:00 [kpsmoused] xamine 2267 1.0 0.0 63728 928 pts/3 R+ 16:50 0:00 ps aux xamine 2268 0.0 0.0 61172 752 pts/3 S+ 16:50 0:00 grep ps Old machine: 132 prod-116431-node1:/home/xamine ps aux | grep ps xamine 23191 0.0 0.0 2332 768 pts/6 R+ 15:41 0:00 ps aux xamine 23192 0.0 0.0 3668 692 pts/6 S+ 15:41 0:00 grep ps Notice that the ps process is using 63M of VIRT mem vs 2 on the old machine. New Machine: Enterprise Linux Enterprise Linux Server release 5.4 (Carthage) Red Hat Enterprise Linux Server release 5.4 (Tikanga) Old Machine: Red Hat Enterprise Linux ES release 4 (Nahant Update 4) Thanks for any thoughts you have!

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• Running suspicious X programs in GNU/Linux

  - by Vi

  What the most harmful thing can malware program started as separate limited user account do if it has access to the X server? Network and filesystem things are already considered by chroot and netfilter. It obviously can lock the screen and I will need to switch to other vt and kill it manually. Can it for example disrupt other GUI programs on the same X server (access to root terminal in nearby window)? I know that it is safer to run it in separate X server, for example, in Xtightvnc or even some virtual machine, but how dangerous is to just run it like other programs?

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• tomcat processParameters complains about "invalid chunk ignored"

  - by cgicgi

  I am hosting a software system running under tomcat for quite a number of customers. Some of these send invalid URLs as request. These URLs may contain "&=" or "&&", which is not within the http specs. Now my tomcat complains about the following: "08.09.2010 12:36:04 org.apache.tomcat.util.http.Parameters processParameters WARNING: Parameters: Invalid chunk '' ignored." It is no problem, as is doesn't affect the operation in any way. Only problem ist that the tomcat/logs/catalina.out is growing with every single request. In the net you can find suggestions like: - Fix your URLs (which I can't, as it is the customers who send them) - Raise tomcats log level to ERROR (which I don't want to do, as it would suppress INFO like "INFO: Reloading context [/ContextName]" and other stuff you want to know. - Redirect the log to the application log (which won't solve the problem, as the message will flood just another log) Does anyone know how to solve the problem at its ROOT, which means: Tell tomcat not to complain about invalid request parameters any longer

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• Ubuntu USB flash boot drive gets spontaneous "Unhandled sense code" error and causes drive to switch to Write protected

  - by Steve

  What happens is that the system runs fine for several days or even a week and then suddenly the root file-system / goes read-only. Looking at the syslog it shows that there was an 'Unhandled sense code'. This is under Ubuntu 10.04 but I saw the same thing with Ubuntu 9 with different flash media. /dev/sdg1 on / type ext4 (rw,errors=remount-ro) Jun 26 08:50:04 host1 kernel: [926247.565090] sd 5:0:0:0: [sda] Unhandled sense code Jun 26 08:50:04 host1 kernel: [926247.565094] sd 5:0:0:0: [sda] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE Jun 26 08:50:04 host1 kernel: [926247.565098] sd 5:0:0:0: [sda] Sense Key : Data Protect [current] Jun 26 08:50:04 host1 kernel: [926247.565103] sd 5:0:0:0: [sda] Add. Sense: Write protected Jun 26 08:50:04 host1 kernel: [926247.565108] sd 5:0:0:0: [sda] CDB: Write(10): 2a 00 00 46 29 18 00 00 08 00 Jun 26 08:50:04 host1 kernel: [926247.565117] end_request: I/O error, dev sda, sector 4598040 Jun 26 08:50:04 host1 kernel: [926247.569788] Buffer I/O error on device sda1, logical block 574499 Jun 26 08:50:04 host1 kernel: [926247.574677] lost page write due to I/O error on sda1

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• The simple "cron" that killed the cloud hosting option

  - by ron M.

  My SaaS application required a nightly cron job to run, analyze a database, send out e-mails and do some database maintenance work. This job cannot be triggered by user action. Almost every 'cloud' hosting solution balks at this to the point where they tell me "we cannot do this". Is this feature so exotic that cloud hosting providers simply don't care about? Am I using the wrong lingo here? should I use another concept? Do I have to go with dedicated hosting where i have "root access" as the only solution to this?

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• nm-applet and nmcli don't work in arch

  - by user1780765

  I installed arch linux about two weeks ago. But I still can't use Network Manager. When I use nm-applet command, I get this error: https://gist.github.com/4129816 And when I use nmcli con command, I get this: https://gist.github.com/4129837 sudo doesn't help me neither. D-Bus look fine, I can use dbus-monitor. I installed gnome, but I still can't use NM. I 'm using openbox now. I have another problem too: what should do so I can use nm-connection-editor with non-root users?

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• Mysql showing some high spikes

  - by user111196

  We one mysql server suddenly the access to it becomes slow of out sudden. So I read some place they said maybe due to var size is it? I am not too sure any idea how to check the root cause of it. The cpu is like nearly 150%. Any indication on it. I have tried this so far. du -sh * 4.0K account 67M cache 4.0K cvs 16K db 8.0K empty 4.0K games 4.0K gdm 148G lib 4.0K local 16K lock 624M log 0 mail 4.0K nis 4.0K opt 4.0K preserve 400K run 298M spool 4.0K tmp 359M www 12K yp

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• Permissions issue on Fedora with separate home partition

  - by Tres

  I am running Fedora 12 and I've setup a partition separate from my root partition to keep shared files and home directories. Now, I've been having permission issues where it says the user cannot chdir into their home directory (/files/home/*). Now, I fixed this originally by chmodding / to 0755 and the home directories also to 0755. And yes, the user is the owner:group of their home directory. Now get this, I didn't change a thing, rebooted, everything still works. Great, right? I boot the server up a day later, and now same ol issue. This is a home server that wasn't on at all at any point in between the working state and non-working state. Also, nothing else was modified. Any ideas? Thanks!

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• How can I disallow a user's scripts from accessing anything above their user folder?

  - by Jaxo

  This is probably an extremely simple question to answer for anybody who knows what they're doing, but I can't find any answers myself. I'm trying to set up a subdirectory for my good friend to test his PHP scripts on my (Apache) hosting plan. I don't want to let him access anything else on my server, however, for obvious reasons. His FTP login already leads him to the proper directory, which does not allow navigating any higher than it's root (mydomain.com/friend/). I would like the same behavior to be applied to any scripts, so he cannot simply <?php print_r(glob("../*")); ?> and view all my files. I'm thinking this can be done with an .htaccess file setting the DocumentRoot somewhere, but I can't have the file available for modification inside the user directory. Is this possible without majorly rewiring the web server? I've tried Googling all sorts of things to describe my problem, but without the proper terminology, all I get is "shared hosting" websites and people trying to sell me security packages.

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• Linux Permissions

  - by Tres

  I am running Fedora 12 and I've setup a partition separate from my root partition to keep shared files and home directories. Now, I've been having permission issues where it says the user cannot chdir into their home directory (/files/home/*). Now, I fixed this originally by chmodding / to 0755 and the home directories also to 0755. And yes, the user is the owner:group of their home directory. Now get this, I didn't change a thing, rebooted, everything still works. Great, right? I boot the server up a day later, and now same ol issue. This is a home server that wasn't on at all at any point in between the working state and non-working state. Also, nothing else was modified. Any ideas? Thanks!

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• Using windows 7 and fedora

  - by vedant1811

  I need to partition my hard disk for windows and fedora (root, swap, users). I thought of creating 3 (primary drives). 2 small ones (~5GB) each for win7 and fedora and a large (~700GB) for common files (pictures, vidoes, documents, etc.) one. Please Tell me which file systems to use in each case and the set-up of primary and extended partitions. Also I want to know, where and on which file system should the Linux Grub (my choice of OS chooser) be installed. I have just a bought a new Asus K53S and using the Fedora Installer Partitioner (Anaconda). Your help is greatly appreciated.

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• Overload Protection

  - by Tyron

  Is there a simple way how I could redirect a visitor (via .htaccess or PHP script) to a static page when the server is overloaded from too many requests? It doesn't have to be a protection against huge amounts of requests at once or protect against DoS Attacks. I think our server would be protected enough if we could prevent the standard website to be shown and instead show a single file "overloaded.html". Also how could I get a measure for a server being overloaded on a typical managed server (= non root access to a Linux server) environment?

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• Is there good FAT driver for FUSE? (Lightweight, not mountlo)

  - by Vi.

  FUSE filesystem list show some FuseFat and FatFuse. Both are old, FatFuse is read-only , FuseFat is non-buildable and probably depends on glib. Now I'm using mountlo for the task (mounting USB drives in generic way without root access or suid things (except of fusermount itself)), but it looks too big for such task. Using FUSE to mount external storage devices is good both for security and for flexibility reason: the kernel sees only block reads and writes while actual code that deals with filesystem details runs with user privileges, allowing user to use custom filesystems and preventing from kernel filesystem exploits. Is there good vfat FUSE driver?

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• Delete protected files in ntfs?

  - by Balchev

  I want to delete an old Windows directory from my system drive (C), but I am unable to due NTFS permissions. I tried from Win 7 and Win 2003, but can't do it. I tried safe mode as well with same result. Is there any way to work around this (other then formating the drive)? Perhaps changing the owner or something? It errors at files like "oldwin/bfsvc.exe". Is there some "superuser" in windows similar to linux root account? Thanks

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• Fedora: "Login Incorrect"

  - by darkblackcorner

  I've just set up a minimal install on my netbook (the default was too resource hungry, so I figured I'd customize the install and learn something about linux at the same time!) No problems logging in as root, but when I create a new user and try to login as them I just get the "Login incorrect" error. I'm certain the password is correct, though the secure log displays an authentication error. Am I missing a permission somewhere? useradd test usermod -p [pwd] test Shell is added automatically I think (checking password file says shell is /bin/bash) I've tried adding the user to the sudo-ers group usermod -a -G wheel which doesn't help. I've kept the password simple in order to rule out human error.

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• installing php from source

  - by samsunggalaxyss

  Hi, i have a centos5.5 server on which i want to host Magento. However i don't want to use a control panel but to do everything myself. The base repo on centos provides php 5.1.6 which is too old for the application to use. If i download and compile from source the newest php, will i also have to install the newest apache and mysql? I wan't all the pieces to work well together. I am new at linux but i know enough to install these things from latest source. But say i install the new apache 2.2.17 which has document root at /usr/local/apache2/htdocs/ how do i tell php where that is, if you understand what i mean? Thanks for your help.

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• ModRewrite Domain

  - by Mike Knoop

  I've done a little research into ModRewrite rules and conditions but have not been able to find a satisfactory set of rules/conds which achieve the effect I'm looking for. Essentially, I have a directory on domain A (http://www.domaina.com/dir/) which I would like to redirect to a different directory on domain B (http://www.domainb.com/diff_dir/). Note that I only want to apply the rewrite rule if the user is attempting to access /dir/ on domaina. If they are accessing a different directory or root I do not want to rewrite the URL. Thank you!

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• Windows 7,find who accessed my computer on network?

  - by pg2012

  It seems something tried to delete root c:/ folders on my computer and it did started delete process alphabetical order. Not sure what is cause. any known virus? We have company network edition of antivirus running, and full scan did not found any virus activity. That makes me suspious about someone on company network attempt to delete? can this possible? If it is how do we know from windows server that who accessed my computer over network?

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• What's the best practice for taking MySQL dump, encrypting it and then pushing to s3?

  - by HalogenCreative

  This current project requires that the DB be dumped, encrypted and pushed to s3. I'm wondering what might be some "best practices" for such a task. As of now I'm using a pretty straight ahead method but would like to have some better ideas where security is concerned. Here is the start of my script: mysqldump -u root --password="lepass" --all-databases --single-transaction > db.backup.sql tar -c db.backup.sql | openssl des3 -salt --passphrase foopass > db.backup.tarfile s3put backup/db.backup.tarfile db.backup.tarfile # Let's pull it down again and untar it for kicks s3get surgeryflow-backup/db/db.backup.tarfile db.backup.tarfile cat db.backup.tarfile | openssl des3 -d -salt --passphrase foopass |tar -xvj Obviously the problem is that this script everything an attacker would need to raise hell. Any thoughts, critiques and suggestions for this task will be appreciated.

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• nginx location pathing issue

  - by Michael Jefferys

  I've got a pretty much default sites-enabled set up in my nginx on debian squeeze and i'm now trying to get it to serve up my munin graphs on myhost/munin/ Heres the location i've added to the config location /munin { root /var/cache/munin/www/; index index.htm index.html; } And here is the error I recieve: 2012/07/09 23:52:03 [error] 3598#0: *13 "/var/cache/munin/www/munin/index.htm" is not found (2: No such file or directory), client: 93.*.*.*, server: , request: "GET /munin/ HTTP/1.1", host: "" This set up used to 'just work' in apache. I'm new to nginx so a bit lost as to why its adding the extra /munin when looking for the path. Any advice?

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• Missed something? Cant upload files to server (permissions)

  - by Camran

  I can upload files as "root" to the Ubuntu server. Then I created a user (me). Next I added the user to the group www-data. Then assigned rwx permissions to www-data. Next, when I try to upload, delete or modify files VIA FILEZILLA, I cant. But via the terminal, I can change files using sudo command. What should I do to be able to upload files without getting the "permission denied" in filezilla? If you need more input let me know. Thanks

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• VMWare Input/Output error on ubuntu host Win7 guest

  - by CShipley

  I am running ubuntu 10.10 as my host with Windows 7 as the guest. About a couple weeks ago I started getting error pop-ups from vmware reporting inability to read or write to a particular file. On futher investigation, I've noticed that I cannot copy that particular file from the linux command line even as root. I get the same input/output error. The SMART utility tells me I have 69 bad sectors on the disk (it is 1 TB) So my question is 1) How do I tell if that HD is going bad? 2) How can I move the VM files to a different part of the disk if I get read/write errors when I try to copy?

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