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  • Procmail lock failures and errors while writing

    - by user58292
    I'm setting up a mail server on an embedded linux system. When sending mail to a local user I get the following error from procmail: procmail: Lock failure on "/home/mail/ktos/.mailspool.lock" procmail: Error while writing to "/home/mail/ktos/.mailspool" procmail: Error while writing to "/var/spool/mail/ktos" From root@waben Wed Dec 15 10:00:40 2010 Folder: **Bounced** 0 procmail: Lock failure on "/root/.mailspool.lock" procmail: Error while writing to "/root/.mailspool" From MAILER-DAEMON Wed Dec 15 10:00:41 2010 Subject: Returned mail: see transcript for details Folder: /var/spool/mail/root 1732 And the mail goes to /var/spool/mail/root. This is my /etc/procmailrc: PATH=/usr/bin:/usr/local/bin MAILDIR=$HOME/.mailspool DEFAULT=$HOME/.mailspool LOGFILE=/dev/pts/0 SHELL=/bin/sh What could be the problem? I'm still pretty green with all the sendmail and procmail stuff as I'm primarily a developer.

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  • When and why would Windows Explorer lock an external hard disk?

    - by Ngu Soon Hui
    I am quite surprised to see that Windows Explorer is locking my external hard disk. Is there any reason why explorer.exe is holding on to my external hard disk? Before I was trying to detach the external hard disk, I was opening a csproj file using Visual Studio 2008. I made sure that I closed down Visual Studio before trying to detach the external hard disk. There was no other active program except Google Chrome, from what I could see, that was running.

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  • Num Lock not working

    - by Luke
    On my laptop (Dell Inspiron 1525), when ever I press Num Lock, they keys which you would normally press to get numbers with num lock on, only show up as letters. I've tried pressing function instead of num lock, but that doesn't work either. Can Any Body Help?

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  • High Lock Wait ratio in MySQL

    - by FunkyChicken
    on my site I log every pageview (date,ip,referrer,page,etc) in a simple mysql table. This table gets very little selects (3 per minute), but a lot of inserts. (about 100 per second) Today I changed this table from an InnoDB table to a MEMORY table, this made sense to me to prevent unnecessary hard disk IO. I also prune this table once per minute, to make sure it never get's too big. -- Performance wise, things are running fine. But I noticed that while running tuning-primer, that my Current Lock Wait ratio is quite high. Current Lock Wait ratio = 1 : 561 My question: Should I worry about this Lock Wait Ratio? And is there something I can change in my my.cnf to improve things so that the lock wait ratio isn't so high?

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  • How to prevent windows 7 shutdown/lock/logoff?

    - by user507993
    Hi, guys In my company staff have to check in after retch to company and check out before leave company on a internal site, sometimes I forget it totally...it's awful. Now i want a program which shows a prompt window when lock/logoff/shutdown, in this way i won't forget any more. Indeed i develop a program (some words and two buttons), and configure this program started when lock/logoff/shutdown in group policy, here is the question: how can i prevent my windows 7 shutdown/logoff/lock? it means i click the button "yes, i want" my pc still running and chrome or something showed up, if i click the button "no, thanks", my pc will shutdown/logoff/lock. please help, thx! i am looking forward to you. ps: i am not good in english, hope you understand. thx again!

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  • Inbox lock for exclusive access [duplicate]

    - by user212051
    This question already has an answer here: Dovecot pop3: Disconnected for inactivity 2 answers -I found server logged into mailbox on my smtp server -This server released connection for inactivity after 10 minutes. -in the 10 minutes between logged in & disconnected for inactivity, 3 attempts to send message from 3 different clients to this mailbox failed due to unable to lock for exclusive access: Resource temporarily unavailable -after disconnection the 3 messages reached mailbox good. I tried to simulate the process and lock test mailbox but I couldn't, I was aiming to understand who can lock ? who has exclusive access ? and why only client server can lock ? and how to solve this ?

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  • Mixing synchronized() with ReentrantLock.lock()

    - by yarvin
    In Java, do ReentrantLock.lock() and ReetrantLock.unlock() use the same locking mechanism as synchronized()? My guess is "No," but I'm hoping to be wrong. Example: Imagine that Thread 1 and Thread 2 both have access to: ReentrantLock lock = new ReentrantLock(); Thread 1 runs: synchronized (lock) { // blah } Thread 2 runs: lock.lock(); try { // blah } finally { lock.unlock(); } Assume Thread 1 reaches its part first, then Thread 2 before Thread 1 is finished: will Thread 2 wait for Thread 1 to leave the synchronized() block, or will it go ahead and run?

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  • How to Create AppArmor Profiles to Lock Down Programs on Ubuntu

    - by Chris Hoffman
    AppArmor locks down programs on your Ubuntu system, allowing them only the permissions they require in normal use – particularly useful for server software that may become compromised. AppArmor includes simple tools you can use to lock down other applications. AppArmor is included by default in Ubuntu and some other Linux distributions. Ubuntu ships AppArmor with several profiles, but you can also create your own AppArmor profiles. AppArmor’s utilities can monitor a program’s execution and help you create a profile. Before creating your own profile for an application, you may want to check the apparmor-profiles package in Ubuntu’s repositories to see if a profile for the application you want to confine already exists. How to Use an Xbox 360 Controller On Your Windows PC Download the Official How-To Geek Trivia App for Windows 8 How to Banish Duplicate Photos with VisiPic

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  • Screensaver + lock double login problem after Maverick upgrade

    - by dr Hannibal Lecter
    Just found something strange after updating from 10.04 to 10.10. I've set up my screensaver to lock the account when activated. When I log back in, I see my desktop for a second and then the screensaver starts again and I have to re-login. I checked my process list in gnome system monitor, and I have two gnome-screensaver processes(!?), one started as /usr/bin/gnome-screensaver and other simply as gnome-screensaver. And no, I did not start one manually. Where do I look for a way to switch off one of those (supposing that's the problem)? I did not find anything in my startup applications.

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  • Mouse and keyboard stop working after suspend or screensaver lock

    - by LEo
    If I leave the computer and let it run into screensaver and lock the screen, the mouse left click won't go back to work. If I suspend the computer, the keyboard won't get back to work. It started after upgrading to Ubuntu 11.04. Any tips to solve this problem? The follwing lines I got on dmesg after the problem happened [30536.564415] psmouse.c: TouchPad at isa0060/serio1/input0 lost sync at byte 1 [30536.565725] psmouse.c: TouchPad at isa0060/serio1/input0 lost sync at byte 1 [30536.568466] psmouse.c: TouchPad at isa0060/serio1/input0 lost sync at byte 1 [30536.569790] psmouse.c: TouchPad at isa0060/serio1/input0 lost sync at byte 1 [30536.571123] psmouse.c: TouchPad at isa0060/serio1/input0 lost sync at byte 1 [30536.571126] psmouse.c: issuing reconnect request and that after I tried to plug again my USB mouse: [31570.040088] usb 6-1: USB disconnect, address 2 [31573.490095] usb 6-1: new low speed USB device using uhci_hcd and address 3 [31573.687376] input: Microsoft Basic Optical Mouse as /devices/pci0000:00/0000:00:1d.1/usb6/6-1/6-1:1.0/input/input12 [31573.687544] generic-usb 0003:045E:0084.0002: input,hidraw0: USB HID v1.10 Mouse [Microsoft Basic Optical Mouse] on usb-0000:00:1d.1-1/input0

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  • Where is the Accessibility mouse click lock?

    - by user10133
    I've been a user of Linux on the desktop off and on again over the years. I very nearly switched my primary computer to Ubuntu prior to the release of Windows 7. There were a few, but significant issues at the time that prevented wholesale adoption, mostly tethering with my phone and lousy VPN Client. One key component I could count on was the Accessibility features. I have recently installed Ubuntu 10.10 and am considering giving it another try, but it appears Ubuntu has taken a leap backwards in that it no longer has a click lock feature for the mouse. Basically I need the ability to press and hold the left button to trigger a locking of the button so I can move the mouse by way of a trackpoint with my prosthesis. I absolutely require this feature and it is a deal breaker if it won't work. I've tried the Dwell keys but this is a chaotic control at best. I've never been able to manage a drag of any kind.

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  • Lock Pages in Memory - not deprecated in Denali

    - by SQLOS Team
    Please note an error in the SQL 2012 documentation for Lock Pages in Memory which indicates that it's deprecated. It's not. Locking pages in memory is a useful feature and there are no plans to deprecate it. It looks like it was accidently included on this page when we made changes to deprecate AWE. So.. keep using it :-) The documentation has been fixed and should appear in Books Online in the next refresh by mid-April. Thanks Guy Originally posted at http://blogs.msdn.com/b/sqlosteam/

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  • Shouldn't all source code be plain text? [on hold]

    - by user61852
    Some developing environment/languages save the source code you write in a binary/propietary format that you cannot see or edit with a generic text editor. I'm not talking about compiled code, but the source code. An example could be PowerBuilder and Oracle Forms. It's ok you use proprietary technology if you want, but not being able to open the source code you wrote, in a simple editor, if only to read it, seems like a very strict form of vendor lock-in. Also this prevents you from using text-based version controls that can show you the difference between two versions in a line-by-line base. If the code is plain text, you don't need a license in order to just open it, see it and learn from it. Should it be a golden rule to avoid vendor lock-in to avoid technologies that save your source code to anything but plain text files ?

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  • How to fix "Could not open lock file" because "Permission denied"?

    - by user66498
    Whenever trying to install any software and update manger, I get an error stating Package operation failed The installation or removal of a software package failed When I run sudo apt-get update I got this result: conan51xd@conan51xd-Lenovo-B470:~$ sudo apt-get -f install [sudo] password for conan51xd: Reading package lists... Done Building dependency tree Reading state information... Done 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. conan51xd@conan51xd-Lenovo-B470:~$ apt-get update E: Could not open lock file /var/lib/apt/lists/lock - open (13: Permission denied) E: Unable to lock directory /var/lib/apt/lists/ E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied) E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?

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  • Two problems, both with either lock or suspend.

    - by user199208
    I recently did two things that may be the cause of either of them. 1) I started using a second screen 2) I installed xscreensaver instead of the stock, power saving option. My first question is about suspend: every time I wake from suspend, networking is disabled. While I've seen multiple posts about that on here, it didn't start happening until recently. Second, lock seems to be disabled now. Are both of these problems a bug, or was this caused by the second screen or maybe xscreensaver?

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  • What happens when modifying Gemfile.lock directly?

    - by Mik378
    Since the second time of bundle install execution, dependencies are loaded from Gemfile.lock when Gemfile isn't changed. But I wonder how detection of changes is made between those two files. For instance, if I'm adding a new dependency directly into Gemfile.lock without adding it into Gemfile (as opposed to the best practice since Gemfile.lock is auto-generated from Gemfile), would a bundle install consider Gemfile as changed ? Indeed, does bundle install process compares the whole Gemfile and Gemfile.lock trees in order to detect changes? If it is, even if I'm adding a dependency directly to Gemfile.lock, Gemfile would be detected as changed (since different) and would re-erase Gemfile.lock (so losing the added dependency...) What is the process of bundle install since the launch for the second time ? To be more clear, my question is: Are changes based only from Gemfile ? That means bundler would keep a Gemfile snapshot of every bundle install execution number N and merely compares it to the bundle install execution N+1 ? Or none snapshot are created in bundler memory and bundler makes a comparison with Gemfile.lock each time to detect if Gemfile must be considered as changed.

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  • bash and flock (file lock) - Doesn't seem to be locking....

    - by Rory
    I am playing with using flock, a bash command for file locks to prevent 2 different instances of the code from running more than once. I am using this testing code: ( ( flock -x 200 ; sleep 10 ; echo "original finished" ; ) 200>./test.lock ) & ( sleep 2 ; ( flock -x -w 2 200 ; echo "a finished" ) 200>./test.lock ) & I am running 2 subshells (backgrounded). The (flock NUM; ...) NUM>FILE syntax is from flock's man page. I expect that the first subshell will get an exclusive lock on test.lock, then wait 10 seconds, then print "original finished", all the time holding the lock. The second subshell will start at more or less the same time, wait 2 seconds, then try to get a lock on test.lock, but timeout after 2 seconds. If it gets a lock, then it'll print "a finished". If it doesn't get the lock, that subshell should stop, and nothing should be printed. Since the first subshell is waiting longer, it will keep the lock for 10 seconds, so the second subshell should not get the lock, and shouldn't finish. i.e. one should see "original finished" printed and not both. What actually happens is that "a finished" is printed, then "original finished" is printed. This implies that that the second subshell is either (a) not using the same lock as the first subhsell or (b) that it fails to get the lock, but continues to execute or (c) something else. Why don't those locks work?

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  • How is spin lock implemented under the hood?

    - by httpinterpret
    This is a lock that can be held by only one thread of execution at a time. An attempt to acquire the lock by another thread of execution makes the latter loop until the lock is released. How does it handle the case when two threads try to acquire the lock exactly the same time? I think this question also applies to various of other mutex implementation.

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  • Breaking out of the Google App Engine Python lock-in?

    - by Alterlife
    Are there any guidelines to writing Google App Engine Python code that would work without Google's infrastructure on other platforms? Is there any known attempt to create an open source framework which can run applications designed for Google App Engine on other platforms? Edit: To clarify, the question really is: If I develop an application on Google App Engine now, will I be able to migrate to another platform later, or is it a lock in?

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  • Lock mouse in center of screen, and still use to move camera Unity

    - by Flotolk
    I am making a program from 1st person point of view. I would like the camera to be moved using the mouse, preferably using simple code, like from XNA var center = this.Window.ClientBounds; MouseState newState = Mouse.GetState(); if (Keyboard.GetState().IsKeyUp(Keys.Escape)) { Mouse.SetPosition((int)center.X, (int)center.Y); camera.Rotation -= (newState.X - center.X) * 0.005f; camera.UpDown += (newState.Y - center.Y) * 0.005f; } Is there any code that lets me do this in Unity, since Unity does not support XNA, I need a new library to use, and a new way to collect this input. this is also a little tougher, since I want one object to go up and down based on if you move it the mouse up and down, and another object to be the one turning left and right. I am also very concerned about clamping the mouse to the center of the screen, since you will be selecting items, and it is easiest to have a simple cross-hairs in the center of the screen for this purpose. Here is the code I am using to move right now: using UnityEngine; using System.Collections; [AddComponentMenu("Camera-Control/Mouse Look")] public class MouseLook : MonoBehaviour { public enum RotationAxes { MouseXAndY = 0, MouseX = 1, MouseY = 2 } public RotationAxes axes = RotationAxes.MouseXAndY; public float sensitivityX = 15F; public float sensitivityY = 15F; public float minimumX = -360F; public float maximumX = 360F; public float minimumY = -60F; public float maximumY = 60F; float rotationY = 0F; void Update () { if (axes == RotationAxes.MouseXAndY) { float rotationX = transform.localEulerAngles.y + Input.GetAxis("Mouse X") * sensitivityX; rotationY += Input.GetAxis("Mouse Y") * sensitivityY; rotationY = Mathf.Clamp (rotationY, minimumY, maximumY); transform.localEulerAngles = new Vector3(-rotationY, rotationX, 0); } else if (axes == RotationAxes.MouseX) { transform.Rotate(0, Input.GetAxis("Mouse X") * sensitivityX, 0); } else { rotationY += Input.GetAxis("Mouse Y") * sensitivityY; rotationY = Mathf.Clamp (rotationY, minimumY, maximumY); transform.localEulerAngles = new Vector3(-rotationY, transform.localEulerAngles.y, 0); } while (Input.GetKeyDown(KeyCode.Space) == true) { Screen.lockCursor = true; } } void Start () { // Make the rigid body not change rotation if (GetComponent<Rigidbody>()) GetComponent<Rigidbody>().freezeRotation = true; } } This code does everything except lock the mouse to the center of the screen. Screen.lockCursor = true; does not work though, since then the camera no longer moves, and the cursor does not allow you to click anything else either.

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  • How to turn off screen (DPMS) together with locking session in KDE?

    - by gertvdijk
    First of all, I'm aware a similar question for GNOME is asked here: "Switch off laptop backlight when locking screen". Objective I would like to turn off my screen on locking the session for power saving reasons. Actual problem Locking the screen on Kubuntu (KDE) inevitably triggers the screensaver as far as I can see. There's no screensaver option other than 'Blank screen' together with its background colour set to black that comes just close to my goal. It blanks the screen, but doesn't turn off the screen. Screen's backlight will still be on and not saving any power. Current workaround A workaround via a script + shortcut key is possible, however, it's just a workaround since it doesn't trigger on all ways to lock the session. Therefore, I think it should be possible to have it done more elegantly, for example by providing this option in KDE's configuration dialog of the screensaver. The workaround I am now using is the following. A script that locks the screen and turns off the screen: #!/bin/bash qdbus org.freedesktop.ScreenSaver /ScreenSaver Lock xset dpms force standby and let it run with a shortcut key via a custom menu entry. It works. Here's why I consider it to be a workaround rather than a solution. It doesn't work for other ways to trigger the locking of the session. My actual question(s) Do I need to touching/patching KDE's source? If not what are my options? If so, could someone point me to where I can get started? what do you think is the recommended place in the GUI for configuration? I'm using Kubuntu 12.04 and willing to upgrade to KDE 4.9 or waiting for the 12.10 release.

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  • Remove Kernel Lock from Unmounted Mass Storage USB Device from the Command Line in Linux

    - by Casey
    I've searched high and low, and can't figure this one out. I have a older Olympus Camera (2001 or so). When I plug in the USB connection, I get the following log output: $ dmesg | grep sd [20047.625076] sd 21:0:0:0: Attached scsi generic sg7 type 0 [20047.627922] sd 21:0:0:0: [sdg] Attached SCSI removable disk Secondly, the drive is not mounted in the FS, but when I run gphoto2 I get the following error: $ gphoto2 --list-config *** Error *** An error occurred in the io-library ('Could not lock the device'): Camera is already in use. *** Error (-60: 'Could not lock the device') *** What command will unmount the drive. For example in Nautilus, I can right click and select "Safely Remove Device". After doing that, the /dev/sg7 and /dev/sdg devices are removed. The output of gphoto2 is then: # gphoto2 --list-config /Camera Configuration/Picture Settings/resolution /Camera Configuration/Picture Settings/shutter /Camera Configuration/Picture Settings/aperture /Camera Configuration/Picture Settings/color /Camera Configuration/Picture Settings/flash /Camera Configuration/Picture Settings/whitebalance /Camera Configuration/Picture Settings/focus-mode /Camera Configuration/Picture Settings/focus-pos /Camera Configuration/Picture Settings/exp /Camera Configuration/Picture Settings/exp-meter /Camera Configuration/Picture Settings/zoom /Camera Configuration/Picture Settings/dzoom /Camera Configuration/Picture Settings/iso /Camera Configuration/Camera Settings/date-time /Camera Configuration/Camera Settings/lcd-mode /Camera Configuration/Camera Settings/lcd-brightness /Camera Configuration/Camera Settings/lcd-auto-shutoff /Camera Configuration/Camera Settings/camera-power-save /Camera Configuration/Camera Settings/host-power-save /Camera Configuration/Camera Settings/timefmt Some things I've tried already are sdparm and sg3_utils, however I am unfamiliar with them, so it's possible I just didn't find the right command. Update 1: # mount | grep sdg # mount | grep sg7 # umount /dev/sg7 umount: /dev/sg7: not mounted # umount /dev/sdg umount: /dev/sdg: not mounted # gphoto2 --list-config *** Error *** An error occurred in the io-library ('Could not lock the device'): Camera is already in use. *** Error (-60: 'Could not lock the device') ***

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  • Remove Kernel Lock from Unmounted Mass Storage USB Device from the Command Line in Linux

    - by Casey
    I've searched high and low, and can't figure this one out. I have a older Olympus Camera (2001 or so). When I plug in the USB connection, I get the following log output: $ dmesg | grep sd [20047.625076] sd 21:0:0:0: Attached scsi generic sg7 type 0 [20047.627922] sd 21:0:0:0: [sdg] Attached SCSI removable disk Secondly, the drive is not mounted in the FS, but when I run gphoto2 I get the following error: $ gphoto2 --list-config *** Error *** An error occurred in the io-library ('Could not lock the device'): Camera is already in use. *** Error (-60: 'Could not lock the device') *** What command will unmount the drive. For example in Nautilus, I can right click and select "Safely Remove Device". After doing that, the /dev/sg7 and /dev/sdg devices are removed. The output of gphoto2 is then: # gphoto2 --list-config /Camera Configuration/Picture Settings/resolution /Camera Configuration/Picture Settings/shutter /Camera Configuration/Picture Settings/aperture /Camera Configuration/Picture Settings/color /Camera Configuration/Picture Settings/flash /Camera Configuration/Picture Settings/whitebalance /Camera Configuration/Picture Settings/focus-mode /Camera Configuration/Picture Settings/focus-pos /Camera Configuration/Picture Settings/exp /Camera Configuration/Picture Settings/exp-meter /Camera Configuration/Picture Settings/zoom /Camera Configuration/Picture Settings/dzoom /Camera Configuration/Picture Settings/iso /Camera Configuration/Camera Settings/date-time /Camera Configuration/Camera Settings/lcd-mode /Camera Configuration/Camera Settings/lcd-brightness /Camera Configuration/Camera Settings/lcd-auto-shutoff /Camera Configuration/Camera Settings/camera-power-save /Camera Configuration/Camera Settings/host-power-save /Camera Configuration/Camera Settings/timefmt Some things I've tried already are sdparm and sg3_utils, however I am unfamiliar with them, so it's possible I just didn't find the right command. Update 1: # mount | grep sdg # mount | grep sg7 # umount /dev/sg7 umount: /dev/sg7: not mounted # umount /dev/sdg umount: /dev/sdg: not mounted # gphoto2 --list-config *** Error *** An error occurred in the io-library ('Could not lock the device'): Camera is already in use. *** Error (-60: 'Could not lock the device') ***

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