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• What's created this key combo?

  - by user73784

  I've recently upgraded my iMac to OSX Mavericks. I'm finding that when I press Control-Shift-N something is immediately locking my screen and making it dark. I can still hear my streaming audio playing, so I guess it's not logging me out. I've looked carefully through the list of keyboard shortcuts in System Preferences, and that key combo isn't mentioned anywhere. Is there any place I can get a list of all active keyboard shortcuts? Is there any terminal command I can run to see which application has taken over this keypress combination? It's really annoying because I habitually use that combo in PHPStorm! (And yes, I have checked the keymaps there too.)

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• Changing startup parameters for MySQL

  - by RN

  I need to remove skip-networking from MySQL startup parameters I am running MySQL on Linux on Centos on a VPS Can someone please tell a newbie how to do this ? I suppose to start and stop the mySQL server, I have to do something like this /etc/init.d/mysqld stop /etc/init.d/mysqld start ps -ef|grep 'mysql' root 11331 20220 0 10:53 pts/0 00:00:00 grep mysql root 32452 1 0 Apr02 ? 00:00:00 /bin/sh /usr/bin/mysqld_safe --skip-grant-tables --skip-networking mysql 32504 32452 0 Apr02 ? 00:00:18 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql --user=mysql --pid-file=/var/run/mysqld/mysqld.pid --skip-external-locking --socket=/var/lib/mysql/mysql.sock --skip-grant-tables --skip-networking

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• Windows 2008 IIS 7 PHP Caching / Blank Page Problems?

  - by darkAsPitch

  I don't even know how to explain this. The only thing I can think is 'why am I working with a windows server?' I am renting a dedicated 1and1 server - I installed PHP myself - with fast CGI and caching (pretty sure I checked OK on something about dynamic caching for PHP when I installed it.) Every few hours of intensive php processing - my pages start locking up - usually just showing blank pages - with no errors whatsoever. Just now, I checked a page - let's call it a.php - and it was showing the results of b.php - I thought I had been hacked! Simply restarting the IIS server however, fixes the problem. Any ideas / help / knowledge on similar problems with windows 2008?

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• data replication from a production web server back to the staging web server

  - by Dennis Smith

  Have two web servers, development/staging and production. Code and some documentation is moved from the staging area to production either through on-demand jobs or nightly via a global replication job. The production server of course sits isolated in a DMZ. There is some content that gets uploaded to the live server that needs to be replicated back to staging. Our security team is locking the network down (and they should) and restricting access to the live server. Best suggestions for replication of "live" data back to "stage" and backing up the live server also.

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• Microsoft Office "Read-only" warning not appearing on Samba shares on Mac OS X Server

  - by bongo

  Hi, some of my users don't get the "read-only" warning (but "read-only" does appear on the title bar and the document is indeed opened read-only) when opening Office 2007 documents already opened by another user. We run the samba share off an XSan volume under Mac OS X 10.5.8 Server. Strict locking is on but oplocks are off (from Server Admin). At home, with a simple samba share in 10.6.3 server, it works correctly. Any ideas? or is this a 10.5.8 behavior?

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• Server 2012 R2 DNS Conditional forwarding not working reliably, possible caching issue?

  - by Matt

  I have a bit of a home lab setup with a domain controller that is acting as the DNS server for my network. For everything, it's working fine and forwards external DNS requests to my ISP. The household recently wanted to get Netflix going and it seemed a DNS option was better than a VPN to get around the region locking, so I signed up for unblock-us.com Since I have a Windows DNS server I thought I'd be clever and make use of conditional forwarders and added the Netflix domain to the list. Initially this worked well and all devices on the network could now access Netflix, however after about an hour going to the Netflix site would result in a page cannot be found. Doing an nslookup of Netflix.com from my PC resulted in it not returning any IP addresses. As a test, I deleted the Netflix domain from the DNS servers cache and things started working again - devices could get to the site again however the same thing happens again after around half an hour to an hour. Have I missed something here that's causing it to stop working?

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• Script for checking the nologin accounts and then disable the account

  - by suma

  "Could you please share the scripts which does the below ?" I have written a script that scans all the relevent logs daily, makes a list of people that have had any activity that day, and maintains database (just a text file) of users and the last time they logged in. Then I have a second script that examines the database for dates more than x days ago, an notifies the user and administrator 2 weeks prior to locking the account. And if there are any dates more than x+y days ago, deletes the account altogether. This seems to be working for me - but I would like to use a non-proprietary solution if one is available. "Could you please share the scripts?"

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• Simple UPDATE query with (sometime) long query times

  - by Eric

  I run a dedicated MySQL server (2 cores, 16GB RAM) serving 100-200 requests per second. It is getting sluggish during peak traffic and I have a hard time optimizing the server. So I'm looking for some ideas now that I have done lots of Innodb fine-tuning with the "TUNING PRIMER" The query that now generates most slow queries is the following (see result from mysqldumpslow): Count: 433 Time=3.40s (1470s) Lock=0.00s (0s) Rows=0.0 (0), UPDATE user_sessions SET tid='S' WHERE idsession='S' I am very surprised to have so many long queries for such a simple query with no locking. Fyi, the table is InnoDB and has 14000 rows. It contains all active sessions on the site with approx 10 UPDATE and SELECT hits per second. Here is its structure: CREATE TABLE `user_sessions` ( `personid` mediumint(9) NOT NULL DEFAULT '0', `ip` varchar(18) COLLATE utf8_unicode_ci NOT NULL, `idsession` varchar(32) COLLATE utf8_unicode_ci NOT NULL, `datum` date NOT NULL DEFAULT '0000-00-00', `tid` time NOT NULL DEFAULT '00:00:00', `status` tinyint(4) NOT NULL DEFAULT '0', KEY `personid` (`personid`), KEY `idsession` (`idsession`), KEY `datum` (`datum`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci Any ideas?

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• putty pageant - forget keys after period of inactivity

  - by pQd

  in the environment where windows client computers are used to run putty to connect to multiple linux servers i'm considering moving away from password based authentication and using public/private key pairs with pass-phrases. using ssh-agent would be nice, but at the same time i'd like it to 'forget' the pass-phrases after given period of inactivity. it seems that putty's pageant does not provide such feature; what would you suggest as alternative? solutions that i'm considering: patching pageant code [might be tricky, code is probably quite rusty and project - sadly - stagnant] writing small custom application using GetLastInputInfo and killing pageant if the machine was idle for more than let's say 15 minutes [ yes, there'll be separate policy for locking the desktops as well ] using alternative ssh client and ssh agent. any suggestions? thanks!

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• NTFS Error - file system structure is corrupt and unusable

  - by SomeGuy

  My Windows 7 (64) keeps completely locking up, and I have to hold the power button to shit it down. Event logs are showing EventID 55. I realize that this can be a warning sign of an impending disk failure, but my data on this machine is safely backed up and I don't feel like taking the time to replace the drive right now. When I have seen this problem before, I have been able to delete the offending folder with a Linux Live CD. (When CHKDSK /F didn't work). In this case, the folder is from VSS. I assume this is from Crashplan, my online backup provider. What are the ramifications of deleting this folder from Linux? Is it safe to do? "The file system structure on the disk is corrupt and unusable. Please run the chkdsk utility on the volume \Device\HarddiskVolumeShadowCopy26."

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• How can I flush my ssh keys on power management activity?

  - by Sam Halicke

  Hi all, Using ssh-agent and private keys per the usual. Everything's working as normal. My question regards best practices on flushing keys from ssh-add on activity like sleep, suspend, hibernate, etc. I thought about writing a simple wrapper around those commands, but then wondered if are they even called? Or does the kernel initiate this activity directly? Are the PM utilities strictly userland? I would like this additional layer of security beyond locking my screen, etc. and was wondering if anyone else had solved this elegantly or has best practices to recommend. Thanks.

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• Can I change a MySQL table back and forth between InnoDB and MyISAM without any problems?

  - by Daniel Magliola

  I have a site with a decently big database, 3Gb in size, a couple of tables with a dozen million records. It's currently 100% on MyISAM, and I have the feeling that the server is going slower than it should because of too much locking, so I'd like to try going to InnoDB and see if that makes things better. However, I need to do that directly in production, because obviously without load this doesn't make any difference. However, I'm a bit worried about this, because InnoDB actually has potential to be slower, so the question is: If I convert all tables to InnoDB and it turns out i'm worse off than before, can I go back to MyISAM without losing anything? Can you think of any problems I might encounter? (For example, I know that InnoDB stores all data in ONE big file that only gets bigger, can this be a problem?) Thank you very much Daniel

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• sp_releaseapplock timeout expired cause?

  - by Darian Miller

  I've been using a combination of sp_getapplock and sp_releaseapplock for some custom application locking purposes for years now with success and just the last few days I've started to get some timeout expired errors on a sp_releaseapplock which is a bit puzzling. When listing the current locks, there's less than a dozen of these active, and the rest of the dedicated server is way underutilized at the moment (less than 100 batches/sec with a mutli-processor, 32GB Ram, higher end machine.) Is there a specific resource to be monitored that may point me in the right direction for determing why such a lightweight operation is timing out? This is called within a stored proc with a timeout of 120 seconds which seems to be amazingly long for this operation to timeout on. SQL 2000 SP4 running on Windows 2003 Server. TSQL used (@pLockUniqueName is VarChar(255)) EXEC @pLockSuccess = sp_getapplock @pLockUniqueName, 'Exclusive', 'Session', 0 EXEC @pUnLockSuccess = sp_releaseapplock @pLockUniqueName, 'Session' Thanks, Darian

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• Server 2008 locks me out when not using the machine for 10 minutes after installing SP2

  - by Daniel Magliola

  I have recently installed Service Pack 2 on my Windows Server 2008 machine (which I use actively for development, and i'm always logged on to). Now, after this installation, when I don't use the machine for some time (let's say, 10 minutes), it locks itself so I have to press Ctrl+Alt+Del and log back in. I have already checked the Screen Saver settings, and it's "None", as it always has been. I also looked into power settings and everything looks right (20 mins to turn off monitor, and i haven't found any settings regarding locking me in there). Do you have any idea what I can do so that it won't lock me out after not using the machine for a while? Thanks! Daniel

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• Shared storage for web cluster

  - by user52475

  Hi all! Have a big question about shared/clustered/distributed file system for storage. It will shared storage for shared web hosting (web files + maildir) and OpenVZ containers storage . Have any one working example of such system? The options are: Lustre GFS1/GFS2 - GFS2 - as I understand is EXPERIMENTAL... NFS This 3 systems which I consider for shared storage. Now I have storage with HW RAID 10 - 1TB. NFS - As I know there will be problem with locking? GFS/Lustre - problems when there will be a lot of small files , what is typical for hosting environment and problems with maildir.

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• I can't delete a file - even when using unlocker

  - by chipperyman573

  So I have a 64 bit windows 7 ultimate computer. On my desktop, I have a .iso file that should NOT be used by anything. However, when I use lockhunter (unlocker doesn't work for me), it says it can't unlock or delete it. When I check what it's being used by, it says by the system. Here's a picture when I click delete: Here's a picture of when I click unlock it: When I click Other Close locking process: I've had this file on my computer for a LONG time now and haven't been able to delete it. I've also tried eraser erase on startup, but that doesn't work, either. How can I remove this file?

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• How to prevent people taking software home?

  - by Robert MacLean

  Most companies I have worked at have had either a collection of disks or a network share with the installs of the commonly used software in them. This is to allow the IT dept and skilled users to install the software they need on their work machines very easily. However some users would see this as an opportunity to get "free" software for their home machines. I've seen the draconian approach of locking the machine down completely, but that does not work well (in my view - if you disagree feel free to comment on it) because You add so much extra work to IT Users get that big brother feeling So how do you find a way to prevent users from taking home software but still allowing them to install what they need? You can make the assumption that most of the users in the organisations I work in are smart enough to install software, I'm not worried about the tea lady here.

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• How to copy protected files when an Administrator in Vista (easily)

  - by earlz

  Hello, I have a harddrive I need to backup. In the harddrive is of course things like Documents and Settings which is set to not allow other people to see inside someone's personal folders. I am an administrator though and I can not figure out how to mark these files so that I am permitted to access them and copy them. IWhen I double click on My Documents then it pops up saying You must have permission to access this and gives me an option like ok or cancel. I click ok and then it says you do not have permission to access these files I'm an administrator on the system so I don't understand why Vista is locking me out. How can I setup vista so that it will let me copy every file, even ones I don't have permission to?

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• Lock down PC so only a few programs can be used?

  - by user1413

  I'm interested in locking down my PC so that only a few programs can be used. For example, when I'm writing a paper I only want to be able to use Word. No Firefox or DVD player because I will be distracted. I want to have various modes (one for writing a paper, another for doing taxes) that will prevent me from using any program except for the ones I need to perform a task. Is there a program that will do that? Can be free or commercial.

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• Change Win7 taskbar position (overriding GPO, Registry Editor, Admin. Rights)

  - by diegocavazos53

  I run the computer center of my Faculty and the problem is that users manage to change the Win7 taskbar position. I don't really know how they do this as far as I have applied many group policies that are specific to the taskbar (like locking it). I have also disallowed users from entering new registry keys or executing the command prompt (or employing scripts). They have regular user rights and many Win7 tweaking programs need administrator rights to make changes to the GUI. So in other words, the taskbar is locked, there is a policy that sets its position to the lower part of the screen, users can't see the control panel, add registry keys, use the command prompt and don't have admin. rights. How do they keep moving the taskbar position to the upper part of the screen? Any ideas would be greatly appreciated. Thank you.

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• Is there a way to permanently remove highlighting from editable areas within a protected word docume

  - by CT

  Is there a way to permanently remove highlighting from editable areas within a protected word document? This is in relation to a previous question I had on locking portions of a Word Document located here: http://superuser.com/questions/143860/can-i-lock-or-make-uneditable-portions-of-a-word-document Using this solution, any editable area is highlighted. You can uncheck the Highlight editable area box within the Protect Document bar but if you save and reopen the area is highlighted again. The document is on a network drive. If another user were to open the document it would also be highlighted. Is there anyway to permanently turn this highlighting off so that when a user accesses the document from the network they do not see this highlighting? Using Word 2007.

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• PowerShell script halts execution when Windows XP PC is locked

  - by jshin47

  I have the following script that does a continuous ping and reports failures. It works fine, except the loop apparently "suspends" when the computer is locked. I have confirmed this by starting the script, immediately locking the PC, waiting 10 minutes, and seeing how many pings have occurred. It is nowhere near the expected number. What could be the culprit? Write-Host "Entering monitoring loop..." -Background DarkRed $ping = new-object System.Net.NetworkInformation.Ping $count_up = 0 $count_dn = 0 $count_dd = 0 while ($true) { $result = $ping.send("10.1.1.1") if ($result.Status -eq "Success") { $count_up++ $count_dd = 0 } else { $count_dn++ $count_dd++ $this_date = Get-Date Write-Host "VPN ping failed at time " $this_date -Background Magenta if ($count_dd -gt 3) { Write-Host "***VPN is Down***" `a send_mail_notification("VPN is Down", "") } } if ($Host.UI.RawUI.KeyAvailable -and ("q" -eq $Host.UI.RawUI.ReadKey("IncludeKeyUp,NoEcho").Character)) { Write-Host "Exiting monitoring loop..." -Background DarkRed break; } Start-Sleep -m 250 } $total = $count_up + $count_dn $uptime = 100 * $count_up / $total Write-Host $count_up " out of " $total " pings for a " $uptime "% uptime."

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• How do you handle the task of changing the schema of a production MySQL database?

  - by Continuation

  One of the biggest complaints I have heard about MySQL is that it locks up a table if you try to change its schema like adding a column or adding an index. By "locking up the table" does it mean I can neither read nor write to the table? Sometimes for hours? That seems a pretty severe limitations. I was going to use MySQL for my new project but this gives me pause. Is there a workaround for this? How do you handle the task of changing the schema of your production MySQL database? By the way someone told me Postgresql doesn't have this problem. Is that true - I can both read and write to a Postgresql table while changing its schema? Is there any performance penalty incurred? Would love to hear your experiences.

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• Can't unlock locked screen, in Ubuntu 12

  - by Camille Goudeseune

  After locking the screen (with a keystroke bound to xlock -nice 8 -mode blank), I can unlock the screen as expected, but only within a few minutes. After being locked overnight, when I hit a key (even Ctrl+Alt combos), the screen stays black with just a brief white flash across the middle of both monitors. The workaround is to ssh in from another host and restart X. Some months ago, this happened every few weeks. By now it happens almost every morning. How do I even start to diagnose this? What might I look for in log files? (The intermittency is particularly troubling.) Failing that, is there an alternative to xlock aka xlockmore? Hardware: 3-year-old HP minitower, GEForce 9800 GT, two Asus LCD monitors. Software: Ubuntu 12.04.2 LTS. Window manager awesome-wm. NVidia driver 304.88. XLock version xlockmore-5.31.

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• MySQL Cluster transaction isolation level - READ_COMMITTED

  - by Doori Bar

  I'm learning by mostly reading the documentation. Unfortunately, http://dev.mysql.com/doc/refman/5.1/en/set-transaction.html#isolevel_read-committed doesn't say anything, while it says everything. Confused? Me too. ndb engine supports only "READ_COMMITTED" transaction isolation level. A. It starts by saying "sets and reads its own fresh snapshot", which I translate to: The transaction is having a separated 'zone' which whatever it stores there - is what it reads back. B. While out-side of the transaction, the old-values are unlocked. C. It continues with: "for locking reads" sentence - No idea what it means. Question: they claim only READ_COMMITTED transaction isolation level is supported, but while handling a BLOB or a TEXT, they say the isolation is now "locked for reading" too. So is it a contradiction? can a transaction LOCK for reading just as well while handling something other than BLOB/TEXT? (such as integers)

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