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• Write-but-not-delete permissions on SAMBA

  - by m6a-uds

  Hi! I installed samba on my linux server for public file sharing on the LAN. I works great currently, but I would like to add some security: People from LAN should be able to Read files present and Add new ones, but not delete files. I want to keep this privilege for me ;-) How should-I do this? I have set up a "admin" account having full access even to deletion. There is just left to configure the "guest" acount. Google isn't helping that much right now...

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• Can't write to file - 'Operation not permitted' WITH sudo

  - by charliehorse55

  I am having trouble writing to a few files on an external HD. I am using it to store media files as well as my time machine backup. The drive is formatted as HFS+ Journaled, and other files on the drive can be written successfully. Additionally, the time machine backup is working perfectly. Permissions for the file: $ ls -le -@ Parks\ and\ Recreation\ -\ S01E01.avi -rw-rw-rw-@ 1 evantandersen staff 182950496 22 May 2009 Parks and Recreation - S01E01.avi com.apple.FinderInfo 32 Things I have already tried: sudo chflags -N sudo chown myusername sudo chown 666 sudo chgrp staff Checked that the file is not locked (get info in finder) Why can't I modify that file? Even with sudo I can't modify it at all.

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• Win7 - DVD drive spins up but fails to read, fails write

  - by MA

  Running Windows 7 x64. DVD drive is a BenQ DC DQ60 ATA dvd-dl rw. Everything functions correctly in linux, and I can boot to cd/dvds, so the drive itself does work. Symptom: when I insert any CD or DVD (burned or retail), the drive spins up the disk, and (usually) displays the disk title in My Computer, but just continues to spin indefinitely. I cannot browse the disk in the drive, install from it, or read anything.

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• How to install two packages that write the same file

  - by Joel E Salas

  Sirs, a conundrum. I have two packages that each create /usr/bin/ffprobe. One of them is ffmpeg from the Deb Multimedia repository, while the other is ffmbc 0.7-rc5 built from source. The hand-rolled one is business-critical, and we used to just install it from source wherever it was necessary. I can only assume it would clobber the ffmpeg file, and there were never any ill effects. In theory, it should be acceptable for our ffmbc package to overwrite the file from the ffmpeg package. Is there any easy way to reconcile this?

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• Networking Problem MrxSmb event 50 "Delayed Write Failed" errors occurring all of the sudden

  - by Johnny Musso

  JUST THIS MONTH, we have started getting reports from a number of very stable clients that MrxSmb event id 50 errors keep appearing in their system event logs. Otherwise, they do not appear to have any networking problems except that there is a critical legacy application which seems to either be generating the MrxSmb errors or having errors occur because of them. The legacy application is comprised of 16 bit and 32 bit code and has not been changed or recompiled in many years. It has always been stable on Windows XP systems. The customers that have the problem usually have a small (5 clients or less) peer to peer network with all Windows XP systems. All service packs are loaded on the XP machines. Note: The only thing that seems to correct the problem is disabling opportunistic locking. I don't like this solution because it seems to slow down the network and sometimes causes record locking issues between users (on some networks). Also, this seems to have just started happening - as if a Windows update for XP has caused it? However, I have removed recent updates and it did not correct the issue. Thanks in advance for any help you can provide.

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• "Path Not Found" when attempting to write to a sub folder within a mapped drive

  - by Adam

  We have an interesting issue with one of our server shares, or possibly, our Win 7 desktops. When our users try to save files in a sub folder, either via copy/paste or through an application, to a mapped drive on our DC they receive an error saying "Path not found". They can however browse this folder and open files from it. This is where the "Path Not Found" error doesn't seem to stack up in my opinion. Users can however save files fine in the root folder of the mapped drive, it appears only to affect sub folders. It seems to be random which users and machines this affects. The users can log on to a different machine and be able to save in sub folders fine, on the same mapped drive. Event viewer hasn't been much help either. Currently, the only solution we have found is to image the machines affected which solves the issue. Our servers are Server 2008 R2 with Win 7 Pro desktops. Any help/pointers/suggestions would greatly be appreciated.

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• Mac can write to samba share

  - by David

  I have a samba share that works fine for PCs, but we have a mac user who seems to only be able to edit and rename existing files, he cannot add new files. Any ideas? Here is the share setup: path = /media/freeagent/officeshare read only = No guest ok = Yes writeable = yes public = yes

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• NTFS write speed really slow (<15MB/s) on Ubuntu

  - by Zulakis

  When copying large files or testing writespeed with dd, the max writespeed I can get is about 12-15MB/s on drives using the NTFS filesystem. I tested multiple drives (all connected using SATA) which all got writespeeds of 100MB/s+ on Windows or when formatted with ext4, so it's not an alignment or drive issue. top shows high cpu usage for the mount.ntfs process. AMD dual core processor (2.2 GHz) Kernel version: 3.5.0-23-generic Ubuntu 12.04 ntfs-3g version: both 2012.1.15AR.1 (Ubuntu default version) and 2013.1.13AR.2 How can I fix the writespeed?

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• Likewise: joined Active Directory but cannot write shares.

  - by Aron Rotteveel

  I have never used a Linux system in an AD environment before and am trying to join my laptop running Ubuntu to join our Active Directory (DC is a Windows Server 2008 machine) using Likewise-open. Using the GUI wizard, I have joined the domain. I can mount network shares using CIFS Problem: I only have read access to our fileserver. What more is needed to get the AD to recognize me as a user who has the appropriate rights? Any help is appreciated.

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• Motherboard jumper setting: BIOS flash write protection.

  - by Wesley

  I have an ECS P4M800PRO-M478 motherboard and I'm just setting up the jumpers right now, of which there are only two sets. One is the CLR_CMOS jumper, which is set to Normal, of course. However, there is another set called BIOS_WP which controls whether BIOS flash writing is protected or unprotected. Which setting should I have it set at and would this affect any BIOS flashes in the future?

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• RAID Read/Write Speed Gradually Slows

  - by Nalandial

  This is actually a server at home, but I felt it was sufficiently complicated as to not have it on SuperUser and could easily apply to a professional situation. I have a file server running Debian (Lenny 5.0.4), and it has an XFS LVM on top of a RAID 5 with the OS drive separate from the RAID. It's also running apache, samba, and postgresql. Side note: before anyone asks, I'm using RAID5 because I get more bang for the buck on raw drive space, and still have some fault tolerance. When the box is started (via shutdown or reboot) reading/writing to it's samba share maxes out the gigabit network connection. Over time, this slowly degrades eventually becoming < 10MB/s; however, when rebooted the speed returns to maxing out the connection. Why is this happening, and is there a way to 'clear' out whatever's causing it without taking the server down? Thanks in advance!

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• Write permissions LAMP (Debian Lenny)

  - by letseatfood

  I am working on a PHP script that transfers files using FTP functions. It has always worked on my production server (which is a hosting service). The development server I have just setup (I am a novice to servers) is Debian Lenny with Apache2, PHP5, and MySQL5. The file transfer works correctly, but once the file has been written to the server, it has permissions of 600. This makes it impossible for me to view the file (JPEG) in the web browser, as permission is denied. I have scoured the internet and even broken my server installation and reinstalled it trying to figure this out (which has been fun, nonetheless!). I know it is unwise to set 777 permissions on public accessible files, but even that will not solve the problem. The only thing that works is if I chmod 777 thefile.jpg after it has been transferred, which is not a working solution. I tried changing the owner of my site files to www-data per this post, but that also does not work. My user is mike, and it still does not work whether the owner of the files is mike or root. Would somebody point me in the right direction? Thanks! And, of course, let me know if I can clarify anything.

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• Testing for disk write

  - by Montecristo

  I'm writing an application for storing lots of images (size <5MB) on an ext3 filesystem, this is what I have for now. After some searching here on serverfault I have decided for a structure of directories like this: 000/000/000000001.jpg ... 236/519/236519107.jpg This structure will allow me to save up to 1'000'000'000 images as I'll store a max of 1'000 images in each leaf. I've created it, from a theoretical point of view seems ok to me (though I've no experience on this), but I want to find out what will happen when there will be directories full of files in there. A question about creating this structure: is it better to create it all in one go (takes approx 50 minutes on my pc) or should I create directories as they are needed? From a developer point of view I think the first option is better (no extra waiting time for the user), but from a sysadmin point of view, is this ok? I've thought I could do as if the filesystem is already under the running application, I'll make a script that will save images as fast as it can, monitoring things as follows: how much time does it take for an image to be saved when there is no or little space used? how does this change when the space starts to be used up? how much time does it take for an image to be read from a random leaf? Does this change a lot when there are lots of files? Does launching this command sync; echo 3 | sudo tee /proc/sys/vm/drop_caches has any sense at all? Is this the only thing I have to do to have a clean start if I want to start over again with my tests? Do you have any suggestions or corrections?

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• Why can't they write viruses for Mac computers?

  - by Mehper C. Palavuzlar

  They always say that one of the most important advantages of Macs is that no viruses are written/coded for them. What is the reason behind it? Is it so difficult or impossible to code a virus on Mac?

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• What file types can OpenOffice read or write

  - by Nifle

  Could anyone give me a current list of file types OpenOffice supports. Both what it can open and what it can export to?

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• Write permissions on uploaded files - PHP & Linux

  - by letseatfood

  I am working on a PHP script that transfers files using FTP functions. It has always worked on my production server (which is a hosting service). The development server I have just setup (I am a novice to servers) is Debian Lenny with Apache2, PHP5, and MySQL5. The file transfer works correctly, but once the file has been written to the server, it has permissions of 600. This makes it impossible for me to view the file (JPEG) in the web browser, as permission is denied. I have scoured the internet and even broken my server installation and reinstalled it trying to figure this out (which has been fun, nonetheless!). I know it is unwise to set 777 permissions on public accessible files, but even that will not solve the problem. The only thing that works is if I chmod 777 thefile.jpg after it has been transferred, which is not a working solution. I tried changing the owner of my site files to www-data per this post, but that also does not work. My user is mike, and it still does not work whether the owner of the files is mike or root. Would somebody point me in the right direction? Thanks! And, of course, let me know if I can clarify anything.

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• file corruption on read/write 2.6.32-22-server (happens across many kernels)

  - by Jonathan

  Hi Guys, I'm having an issue where after the server has been up for a period of time (~week/few days) the server will start reading corrupt data. For instance when I run a sha1sum of a file after a fresh boot it remains the same. However after a while I will start to get segfaults and from then on whenever I read this file I get a different sha1sum. I've checked S.M.A.R.T with long tests and I've run an extended memtest86+(12 passes) My lspci is as follows: 00:00.0 Host bridge: Advanced Micro Devices [AMD] RS780 Host Bridge 00:01.0 PCI bridge: Advanced Micro Devices [AMD] RS780 PCI to PCI bridge (int gfx) 00:06.0 PCI bridge: Advanced Micro Devices [AMD] RS780 PCI to PCI bridge (PCIE port 2) 00:07.0 PCI bridge: Advanced Micro Devices [AMD] RS780 PCI to PCI bridge (PCIE port 3) 00:11.0 SATA controller: ATI Technologies Inc SB700/SB800 SATA Controller [AHCI mode] 00:12.0 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI0 Controller 00:12.1 USB Controller: ATI Technologies Inc SB700 USB OHCI1 Controller 00:12.2 USB Controller: ATI Technologies Inc SB700/SB800 USB EHCI Controller 00:13.0 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI0 Controller 00:13.1 USB Controller: ATI Technologies Inc SB700 USB OHCI1 Controller 00:13.2 USB Controller: ATI Technologies Inc SB700/SB800 USB EHCI Controller 00:14.0 SMBus: ATI Technologies Inc SBx00 SMBus Controller (rev 3c) 00:14.1 IDE interface: ATI Technologies Inc SB700/SB800 IDE Controller 00:14.3 ISA bridge: ATI Technologies Inc SB700/SB800 LPC host controller 00:14.4 PCI bridge: ATI Technologies Inc SBx00 PCI to PCI Bridge 00:14.5 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI2 Controller 00:18.0 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] HyperTransport Configuration 00:18.1 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Address Map 00:18.2 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] DRAM Controller 00:18.3 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Miscellaneous Control 00:18.4 Host bridge: Advanced Micro Devices [AMD] K10 [Opteron, Athlon64, Sempron] Link Control 01:05.0 VGA compatible controller: ATI Technologies Inc Radeon HD 3300 Graphics 01:05.1 Audio device: ATI Technologies Inc RS780 Azalia controller 02:00.0 Ethernet controller: Atheros Communications Atheros AR8121/AR8113/AR8114 PCI-E Ethernet Controller (rev b0) 03:00.0 FireWire (IEEE 1394): VIA Technologies, Inc. Device 3403 I could really use some help on this, do you have any idea what could cause this? It's really frustrating me as it seems to trigger entirely randomly and will not go away until I reboot. I'm also use KVM for virtualization as well as MD for software RAID on this server and the processor is a Phenom II X4 965. I don't believe it's the software raid however as this affects files also hosted on non-raid partitions so I don't know.

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• Granting read-write rights to my web application on VPS

  - by davykiash

  Am currently testing a bulk CSV import functionality web application and I came across a error The given destination is not writeable My application is zend based and uses the MVC structure application --uploads library --Zend public --index.php What Ubuntu command do I exectute to safely grant the necessary rights to my uploads folder in my web application?

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• Why is group write permission ignored in Ubuntu?

  - by NorthPole

  I want my user to have full access to the local Apache root folder, and I also want the Apache user to have full access to the same folder. What I did was create a new group called DevGroup and I added my user and www-data there. Also I changed the permissions to 770 to allow full group access. But now it won't allow me or the Apache user any kind of access to the folder. Here is what I get with ls: drwxrwx--- 12 root DevGroup 4096 Sep 27 17:34 testFolder Which seems perfect but when I try as a user to access the file I get this: var/www$ ls testFolder/ ls: cannot open directory testFolder/: Permission denied Also when I try to access a page in the folder from a browser: [Thu Sep 27 17:47:16 2012] [error] [client 127.0.0.1] PHP Fatal error: Unknown: Failed opening required '/var/www/testFolder/foo.php' (include_path='.:/usr/share/php:/usr/share/pear') in Unknown on line 0 What's the problem and how can I fix it?

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• I am trying to write an htaccess file performs authentication and redirects authenticated users to a

  - by racl101

  This is what I have so far but I can't get the RewriteCond and RewriteRule properly. RewriteEngine On RewriteCond %{LA-U:REMOTE_USER} (\d{3})$ RewriteRule !^%1 http://subdomain.mydomain.com/%1 [R,L]. AuthName "My Domain Protected Area" AuthType Basic AuthUserFile /path/to/my/.htpasswd Require valid-user This is what I mean the ReWriteCond and RewriteRule to say: "If the REMOTE_USER has a username ending in 3 digits then capture the three digits that match and for whatever url they are trying to access if it does not start with the 3 digits captured then redirect them to the sub directory with the name equal to those captured three digits." In other words, if a user named 'johnny202' is authenticated then if he's requesting any directory other than http://subdomain.mydomain.com/202/ then he should be redirected to http://subdomain.mydomain.com/202/ The only thing I can think of that is wrong is the first instance of '%1'.

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• Write permissions on uploaded files - Linux, Apache, PHP

  - by letseatfood

  I am working on a PHP script that transfers files using FTP functions. It has always worked on my production server (which is a hosting service). The development server I have just setup (I am a novice to servers) is Debian Lenny with Apache2, PHP5, and MySQL5. The file transfer works correctly, but once the file has been written to the server, it has permissions of 600. This makes it impossible for me to view the file (JPEG) in the web browser, as permission is denied. I have scoured the internet and even broken my server installation and reinstalled it trying to figure this out (which has been fun, nonetheless!). I know it is unwise to set 777 permissions on public accessible files, but even that will not solve the problem. The only thing that works is if I chmod 777 thefile.jpg after it has been transferred, which is not a working solution. I tried changing the owner of my site files to www-data per this post, but that also does not work. My user is mike, and it still does not work whether the owner of the files is mike or root. Would somebody point me in the right direction? Thanks! And, of course, let me know if I can clarify anything.

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• Server 2008 RAID 5 Write Speeds

  - by Solipsism

  I recently configured a RAID 5 partition in Server 2008 with 4 RAID 5 disks. These disks are connected through a SATA expansion card that uses PCIe. This morning, I checked and they had finally finished synchronizing, and so I tried to do some speed tests. Copying off the disks started pretty much fine - speeds began at 125MB/s, then trailed down to about 70MB/s, which I found odd but not worrying. Writing TO the disks however is a completely different story. I attempted to copy some of my VM host ISOs onto the disks (~2-4 GB apiece) and this resulted in speeds of approximately 10MB/s. I tried copying both from a local disk (connected directly to the motherboard) and from another server ththe gigabit network and results were the same. I checked the performance monitor while transferring the files and the only thing that stuck out was that my memory hard faults shot up to 6,000 per minute (spiking around 200/s) by explorer.exe. The system is running 2GB of DDR667 ECC RAM and a quad-core 2.3GHz opteron. Is there anything I can do to fix this performance issue (buy more RAM? move the drives to a faster box?, etc) or am I just screwed so long as I stick to windows.

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• Git push write access for deployment denied

  - by Stepchik

  I have strange issue when try git push. Git clone and commit works fine. W access for my_project DENIED to deploy_my_project_ My gitolite.conf repo my_project R = deploy_my_project_111 RW+ = my_name I wonder why git push takes wrong user (deploy_project_111) with read access. This error is float. Twice i had to change rsa key(rsa keys is unchangeble) and restart computer. May be my computer do something wrong.

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• User http does not have write permissions directory?

  - by dwieeb

  I have a bit of an odd set up, I think. I have groups for each domain my server hosts, and I add the user http to each domain group along with the users that should have access to the groups' domains. In my php script running from a directory 'public_html', I try creating a file: <?php $output = ""; print exec('touch test 2>&1', $output); But I get touch: cannot touch `test': Permission denied and the file is not created. But here, clearly stated, the group has all permissions on the directory: drwxrwxr-x 5 dwieeb example.com 1024 Feb 4 05:19 public_html And here are the permissions on the php file in public_html that is trying to use the exec function: -rw-rw-r-- 1 dwieeb example.com 59 Feb 4 05:19 test.php How is this possible if http is part of the example.com group (as seen from a cat on /etc/group) and the directory has full permissions for the group? ... example.com:x:1000:dwieeb,http I'm stumped. EDIT (since apparently I'm not cool enough to answer my own questions yet): Ah, I found the problem. Yes, I restarted Nginx, but the php-fpm daemon must be restarted as well when http is added to the group for my domain. On Arch Linux: rc.d restart php-fpm

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• java -version doesn't write to stdout?

  - by Zárate

  Hi there, Either I'm doing something silly or Sun is. How come something like: java -version > version.txt Still prints out to stdout and leaves version.txt empty? I'm checking out the exit code, and it's still 0, so is not that's writing to stderr. I need this because I'm building a test-environment tool and want to check if the version of Java is adequate, I was planning to catch that version output, but now I'm stuck. I'm on OS X Leopard, Java version 1.6.0_20. Any ideas? Cheers, Juan

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