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  • How to get automatic upgrades to work on Ubuntu Server?

    - by J. Pablo Fernández
    I followed the documentation for enabling automatic upgrades in Ubuntu servers, but it's not really updating anything at all. My /etc/apt/apt.conf.d/50unattended-upgrades looks almost like the default. // Automatically upgrade packages from these (origin, archive) pairs Unattended-Upgrade::Allowed-Origins { "Ubuntu karmic-security"; "Ubuntu karmic-updates"; }; // List of packages to not update Unattended-Upgrade::Package-Blacklist { // "vim"; // "libc6"; // "libc6-dev"; // "libc6-i686"; }; // Send email to this address for problems or packages upgrades // If empty or unset then no email is sent, make sure that you // have a working mail setup on your system. The package 'mailx' // must be installed or anything that provides /usr/bin/mail. Unattended-Upgrade::Mail "[email protected]"; // Automatically reboot *WITHOUT CONFIRMATION* if a // the file /var/run/reboot-required is found after the upgrade //Unattended-Upgrade::Automatic-Reboot "false"; The directory /var/log/unattended-upgrades/ is empty. Running /etc/init.d/unattended-upgrades start is not very nice: root@mozart:~# /etc/init.d/unattended-upgrades start Checking for running unattended-upgrades: root@mozart:~# Something seems to be broken, but I'm not sure why. I have pending updates and they are not being applied: root@mozart:~# aptitude safe-upgrade Reading package lists... Done Building dependency tree Reading state information... Done Reading extended state information Initializing package states... Done The following packages will be upgraded: linux-libc-dev 1 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded. Need to get 0B/743kB of archives. After unpacking 4096B will be used. Do you want to continue? [Y/n/?] In all the servers I have, unattended upgrades seems to have been disabled: root@mozart:~# apt-config shell UnattendedUpgradeInterval APT::Periodic::Unattended-Upgrade root@mozart:~# Any ideas what am I missing?

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  • Windows 7 library nightmare

    - by Lobuno
    In our active directory we deploy a policy to our clients where the personal directory (My documents) is redirected to a file server of ours \server\share\username\Documents In older systems everything worked fine. in Windows 7 some users are experimenting the following symptoms: * The Documents library is EMPTY * Where the documents library should be shown in Explorer an empty white icon is displayed. No caption. * Right clicking in the Documents library to edit the folders that are part of the libraries brings the dialog up. However, that dialog is unusable. No folder is present there and clicking Add folder does nothing. * Deleting the library and auto-creating it doesn't solve the problem * The shared directory can be accessed via UNC paths and it can be mounted as a shared drive as well. The library is still broken. * The shared drives are on a W2008 indexed server... * Using the Windows Library tool utility doesn't solve the problem. What can the cause of this problem be and how can this be solved?

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  • PHP script not automatically updating when moved to another server

    - by user32007
    A friend built a ranking system on his site and I am trying to host in on mine via WordPress and Go Daddy. It updates for him but when I load it to my site, it works for 6 hours, but as soon as the reload is supposed to occur, it errors and I get a 500 timeout error. His page is at: jeremynoeljohnson .com/yakezieclub My page is currently at http://sweatingthebigstuff.com/yakezieclub but when you ?reload=1 it will give the error. Any idea why this might be happening? Any settings that I might need to change? Here is the top of the index.php file. I'm not sure which part of any of it is messing up. I literally uploaded the same code as him. Here's the reload part: $cachefile = "rankings.html"; $daycachefile = "rankings_history.xml"; $cachetime = (60 * 60) * 6; // every 6 hours, the cache refreshes $daycachetime = (60 * 60) * 24; // every 24 hours, the history will be written to // - or whenever the page is requested after 24 hours has passed $writenewdata = false; if (!empty($_GET['reload'])) { if ($_GET['reload']== 1) { $cachetime = 1; } } if (!empty($_GET['reloadhistory'])) { if ($_GET['reloadhistory'] == 1) { $daycachetime = 1; $cachetime = 1; } } if (file_exists($daycachefile) && (time() - $daycachetime < filemtime($daycachefile))) { // Do nothing } else { $writenewdata = true; $cachetime = 1; } // Serve from the cache if it is younger than $cachetime if (file_exists($cachefile) && (time() - $cachetime < filemtime($cachefile))) { include($cachefile); echo "<!-- Cached ".date('jS F Y H:i', filemtime($cachefile))." -->"; exit; } ob_start(); // start the output buffer ?>

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  • Permanently deleting files on Mac OS

    - by Jonik
    A while back, as relatively new Mac OS X user, I was surprised to learn that you cannot easily delete files. Directly, that is, without moving them to the trash first. On Windows and Linux this can obviously be done with ease, but not so on the Mac. I noticed this when trying clear up files from a USB memory stick — removing the files ("move to trash") does not free up space; that happens only after emptying the whole system-wide Trash. Not particularly convenient! (It seems stupid to have to empty the whole trashcan just to make some space on the USB stick. There might be gigabytes of stuff in there, and this sort of defeats its purpose - what if you'd actually need to restore something from the trash some day.) So, what's your way of getting around this? Have you bought a 3rd party application like RAW Trash for $16.95 just to delete files, or do you diligently empty the trashcan whenever needed? Or did I miss something? Also, can you convince me that this is actually the way it should be — that users shouldn't be able to fiddle with the filesystem easily? :)

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  • How to properly remove disk from PERC 6/i RAID controller ?

    - by Stefano Borini
    I have a Dell T710, coming with PERC 6/i RAID controller. The current raid has 2x500 GB hard drives (with the OS), and 6x1000 GB hard drives (in RAID-6, currently empty). I would like to take one 1000 GB disk physically out to keep as an immediate spare in case of a crash, and configure the remaining 5x1000 GB in a single VD RAID-6. This is all nice and clean and works, until I realized that the display on the machine reports the lack of the 8th disk as an error. It's marked as error, but appears to be a warning, since the machine is fully functional. My question is: what is the best way to keep one disk as a spare out of the array? should I disassemble the disk from the cradle and insert the empty cradle in the array ? Or should I just silence the error in the display in some way (how?). I know that what I am doing sounds pretty strange, but here is academia and having a spare disk available could take weeks. Better to have one ready in my drawer for any emergency.

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  • IPv6 working fine, IPv4 throws OpenSSL error

    - by jippie
    I am building a webserver ( http://blog.linformatronics.nl/ ), which functions just fine on both IPv4 and IPv6 and when using a non-SSL connection. However when I connect to it through https, IPv6 works as expected, but an IPv4 connection throws a client side error. Server side logs are empty for the IPv4/https connection. Summarized in a table: | http | https -----+-------+------------------------------------------------------- IPv4 | works | OpenSSL error, failed. No server side logging. -----+-------+------------------------------------------------------- IPv6 | works | self signed certificate warning, but works as expected Apparently the SSL tunnel isn't even set up, which accounts for the Apache logs being empty. But why does it work fine for IPv6 and fail for IPv4? My question is why is this OpenSSL error being thrown and how can I solve it? Below is some extra information about the setup. IPv6 https Command used to reproduce IPv6/https behaviour: $ wget --no-check-certificate -O /dev/null -6 https://blog.linformatronics.nl --2012-11-03 15:46:48-- https://blog.linformatronics.nl/ Resolving blog.linformatronics.nl (blog.linformatronics.nl)... 2001:980:1b7f:1:a00:27ff:fea6:a2e7 Connecting to blog.linformatronics.nl (blog.linformatronics.nl)|2001:980:1b7f:1:a00:27ff:fea6:a2e7|:443... connected. WARNING: cannot verify blog.linformatronics.nl's certificate, issued by `/CN=localhost': Self-signed certificate encountered. WARNING: certificate common name `localhost' doesn't match requested host name `blog.linformatronics.nl'. HTTP request sent, awaiting response... 200 OK Length: 4556 (4.4K) [text/html] Saving to: `/dev/null' 100%[=======================================================================>] 4,556 --.-K/s in 0s 2012-11-03 15:46:49 (62.5 MB/s) - `/dev/null' saved [4556/4556] IPv4 https Command used to reproduce IPv6/https behaviour: $ wget --no-check-certificate -O /dev/null -4 https://blog.linformatronics.nl --2012-11-03 15:47:28-- https://blog.linformatronics.nl/ Resolving blog.linformatronics.nl (blog.linformatronics.nl)... 82.95.251.247 Connecting to blog.linformatronics.nl (blog.linformatronics.nl)|82.95.251.247|:443... connected. OpenSSL: error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol Unable to establish SSL connection. Notes I am on Ubuntu Server 12.04.1 LTS

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  • Logging won't stop on log file after renaming/moving it.... how do I stop it?

    - by Jakobud
    Just discovered that logrotate is not rotating our firewall log. So its up to 12g in size. I need to split up the file into smaller chunks and start manually rotating them so I can get things back on track. However before I start splitting the firewall up, I need to stop the firewall from logging to the current firewall log file and force it to start logging to a new empty file. This way I'm not trying to split up or rotate a log file that is still constantly growing. I tried to simply do this: mv firewall firewall.old touch firewall I expected to see the new empty firewall file to start growing in size, but no... the firewall.old is still be logged to. Then I tried to start/stop iptables. No change. firewall.old is still the log file. I tried to move it to another directory. That didn't help. I tried to stop iptables, then change the filename and create a new firewall file and then start iptables again, but no change. How do I stop the logging on this file and force it to start logging on a new file?

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  • Shell wrong encoding

    - by csch
    Somehow I managed to screw up my shell-encoding. An example: root§server:ç£ cat --help Usage: cat ¡OPTION¿... ¡FILE¿... Concatenate FILE(s), or standard input, to standard output. -A, --show-all equivalent to -vET -b, --number-nonblank number nonempty output lines -e equivalent to -vE -E, --show-ends display $ at end of each line -n, --number number all output lines -s, --squeeze-blank suppress repeated empty output lines -t equivalent to -vT -T, --show-tabs display TAB characters as ^I -u (ignored) -v, --show-nonprinting use ^ and M- notation, except for LFD and TAB --help display this help and exit --version output version information and exit With no FILE, or when FILE is -, read standard input. Examples: cat f - g Output f's contents, then standard input, then g's contents. cat Copy standard input to standard output. Report cat bugs to bug-coreutils§gnu.org GNU coreutils home page: <http://www.gnu.org/software/coreutils/> General help using GNU software: <http://www.gnu.org/gethelp/> For complete documentation, run: info coreutils 'cat invocation' root§server:ç£ It should look like: root@server:~# cat --help Usage: cat [OPTION]... [FILE]... Concatenate FILE(s), or standard input, to standard output. -A, --show-all equivalent to -vET -b, --number-nonblank number nonempty output lines -e equivalent to -vE -E, --show-ends display $ at end of each line -n, --number number all output lines -s, --squeeze-blank suppress repeated empty output lines -t equivalent to -vT -T, --show-tabs display TAB characters as ^I -u (ignored) -v, --show-nonprinting use ^ and M- notation, except for LFD and TAB --help display this help and exit --version output version information and exit With no FILE, or when FILE is -, read standard input. Examples: cat f - g Output f's contents, then standard input, then g's contents. cat Copy standard input to standard output. Report cat bugs to [email protected] GNU coreutils home page: <http://www.gnu.org/software/coreutils/> General help using GNU software: <http://www.gnu.org/gethelp/> For complete documentation, run: info coreutils 'cat invocation' root@server:~# I have no clue what went wrong, do you have any ideas?

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  • How to simulate Apache [END] flag on a redirect?

    - by Javier Méndez
    For business-specific reasons I created the following rewrite rule for Apache 2.2.22 (mod_rewrite): RewriteRule /site/(\d+)/([^/]+)\.html /site/$2/$1 [R=301,L] Which if given an URL like: http://www.mydomain.com/site/0999/document.html Is translated to: http://www.mydomain.com/site/document/0999.html That's the expected scenario. However, there are documents which name are only numbers. So consider the following case: http://www.mydomain.com/site/0055/0666.html Gets translated to: http://www.mydomain.com/site/0666/0055.html Which also matches my rewrite rule pattern, so I end up with "The web page resulted in too many redirects" errors from browsers. I have researched for a long time, and haven't found "good" solutions. Things I tried: Use the [END] flag. Unfortunately is not available on my Apache version nor it works with redirects. Use %{ENV:REDIRECT_STATUS} on a RewriteCond clause to end the rewrite process (L). For some reason %{ENV:REDIRECT_STATUS} is empty all the times I tried. Add a response header with the Header clause if my rule matches and then check for that header (see: here for details). Seems that a) REDIRECT_addHeader is empty b) headers are can't be set on the 301 response explicitly. There is another alternative. I could set a query parameter to the redirect URL which indicates it comes from a redirect, but I don't like that solution as it seems to hacky. Is there a way to do exactly what the [END] flag does but in older Apache versions? Such as mine 2.2.22. Thanks!

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  • What XMonad Configuration Best Replicates Default Ion3 Behavior and Feature Set?

    - by mtp
    Not being very familiar with Haskell and lamenting that Ion 3 is now abandonware, I am curious if anyone out there has found a way of replicating the default Ion 3 behavior and aesthetics in XMonad. If I can't have a near-exact replica of Ion 3-style behavior in XMonad, here is what would be critical to me: Virtual desktops that are empty by default and that spawn full-screen applications, which can be split horizontally or vertically evenly, leaving an empty adjacent pane. The panes, which house open windows, are manually resizable, preferably via keyboard. The panes exhibit tabbed behavior, meaning that they can house multiple windows. Windows can be tagged and moved between panes / virtual desktops via keyboard sequence. A given window may be temporarily exploded into full-screen mode via keyboard sequence. Each new virtual desktop starts in the same state—i.e., with one pane. Each virtual desktop may have its panes divided independently of other virtual desktops. From my investigation, it appears that there are several configurations that provide #3. For as much as I want to spend the time to familiarize myself with Haskell, I just simply don't have time. Any suggestions would be greatly appreciated. As far as I can tell, Ion has no conception of master pane or window, so this behavior is not desired.

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  • Unable to Align Layers in Photoshop Properly with CS2

    - by Jonathan Sampson
    Cannot Align Semi-Transparent Items? Windows Vista, Photoshop CS2. Steps to repeat: Create new document Fill a circle on a new layer Drop opacity of filled circle to 10% Create new empty layer below circle layer Merge empty layer with filled circle layer Select entire canvas Attempt to align layers to selectionlayer > align layers to selection > vertical centers I get the following error: Could not complete the Vertical Centers command because there are no layers to be moved. Clearly this is not true, as I'm selecting the layer with the semi-translucent ball on it. Now, if you had tried this same command prior to step 5 (when the layer was at 10% opacity) it would have worked. Is there some way around this problem? I need to move layers around that begin as transparent items, with a layer opacity at 100% where 100% of the layers opacity results in showing objects that are themselves not-very opaque. I've confirmed on another machine that this problem doesn't exist in CS3. I may exist in earlier copies of Photoshop, but I only have access to CS2 (has the problem) and CS3 (does not have the problem).

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  • Access to CD/DVD Drive is Denied through Windows 7 Explorer (Permission Problem)

    - by Synetech inc.
    A while ago I started having trouble with my optical drives. Both of them keep showing up in Explorer as CD/DVD drives on boot, but as soon as I put a disc in either one, it suddenly turns into a hard-drive—“local disk” is displayed in the Type column, though the File System column remains UDF/CDFS. (I though that maybe it was a permission issue on the registry key in HKLM\System\CurrentControlSet..., but I’m not so certain because of the next test.) When I try to open a disc (of any type), I get an access denied error message. If I open an elevated command-prompt, I am able to access the files. Also, if I kill Explorer and run it from an elevated command-prompt (thus giving Explorer elevated permissions), then I can access the files from Explorer. I’ve tried uninstalling and reinstalling the devices without success. The security dialog indicates that there are none set for the drives (no owner and no permissions). I tried setting the owner, but am only able to do so if there is a disc in it (it complains if it is empty), but the settings do not stick (if I immediately open the security dialog after setting it, it is empty again). I tried setting permissions, but that gives an error. I’ve included a screencap-flowchart of the security dialog of one of the drives below. (Yes, I made sure that there are no upper- or lower-filters, and yes, I ran sfc. I also made sure that in the policy editor, “devices: restrict CD-ROM...” is not set.) Does anyone know what the owner and permissions are supposed to be for optical drives and how to reset them?

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  • Can't do anything with Ext. HDD, ".Trashes" is probably the boogyman. (On a MAC!)

    - by Sander Schaeffer
    I bought a external Harddrive today, A Samsung. But I'm not able to do anything with it A few notes on that. I can't put anything on the harddrive. It keeps on 'preparing copying files' I can delete anything on the harddrive system files, except the folder ".Trashes". It gives error 'Unexpected error: -50' I've tried to empty my own trashcan, no changes. I've set the file permission on the .Trashes to read/write everyone, doesn;t change a thing Trying to format the whole drive with DiskUtility, but quits at start, because the drive cannot be deactivated I've tried a few terminal commands sudo -s -r rf /Volumes/Untitled\ 1/.Trashes - Directory not empty -r rf /Volumes/Untitled\ 1/.Trashes - no permissions Also cd /Volumes ls -al cd name_of_partition ls -al -rm -rf .Trashes Again: Permission error. Also: I can't change drive permissions via Disk Utility, via the button 'recover drive permissions', because it is 'blank' I really can't figure out how to delete .Trashes, format the drive or get the damn thing working. Any suggestions? p.s. If this is the wrong Stack Exchange site: Please redirect me!

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  • Never getting a JSON response when running server-side PHP proxy script but I do with others

    - by Dohk
    I'm on PHP 5.3.4 and Apache 2.2 btw So I'm using (or trying to use) Simple PHP Proxy (Simple PHP Proxy) I enter a URL at his example page at SPP Example Page and it works fine, I see the JSON response and all the headers. However, when I copy the exact URL, only changing the URL to now have localhost, I get both empty headers and no JSON. Assuming that the script on his site is the same I downloaded, could this be due to a multitude of things or a setting in Apache and/or the PHP ini? So for example: benalman.com/code/projects/php-simple-proxy/ba-simple-proxy.php?url=http://github.com/&full_headers=1&full_status=1 That will get me a ton of info back Now changing to localhost http://localhost/ba-simple-proxy.php?url=http://github.com/&full_headers=1&full_status=1 {"headers":[],"status":{"url":"https:\/\/github.com\/","content_type":"text\/html","http_code":301,"header_size":194,"request_size":182,"filetime":-1,"ssl_verify_result":0,"redirect_count":1,"total_time":0.094,"namelookup_time":0,"connect_time":0.047,"pretransfer_time":0,"size_upload":0,"size_download":185,"speed_download":1968,"speed_upload":0,"download_content_length":185,"upload_content_length":0,"starttransfer_time":0,"redirect_time":0.047,"certinfo":[]},"contents":null} I even went basic and just used some curl and of course, empty objects being returned other than false for my content and the url I set in my JSON. Any help is deeply appreciated or any ideas.

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  • MySQL Tables Missing/Corrupt After Recreation

    - by Synetech inc.
    Hi, Yesterday I dumped my MySQL databases to an SQL file and renamed the ibdata1 file. I then recreated it and imported the SQL file and moved the new ibdata1 file to my MySQL data directory, deleting the old one. I’ve done it before without issue, however this time something is not right. When I examine the (personal, not MySQL config) databases, they are all there, but they are empty… sort of. The data directory still has the .ibd files with the correct content in them and I can view the table list in the databases, but not the tables themselves. (I have file-per-table enabled, and am using InnoDB as default for everything.) For example with the urls database and its urls table, I can successfully open mysql.exe or phpMyAdmin and use urls;. I can even show tables; to see the expected table, but then when I try to describe urls; or select * from urls;, it complains that the table does not exist (even though it just listed it). (The MySQL Administrator lists the databases, but does not even list the tables, it indicates that the dbs are completely empty.) The problem now is that I have already deleted the SQL file (and cannot recover it even after scouring my hard-drive). So I am trying to figure out a way to repair these databases/tables. I can’t use the table repair function since it complains that the table does not exist, and I can’t dump them because again, it complains that the tables don’t exist. Like I’ve said, the data itself is still present in the .ibd files and the table names are present. I just need a way to get MySQL to recognize that the tables exist in the databases (I can find the column names of the tables in question in the ibdata1 file using a hex-editor). Any idea how I can repair this type of corruption? I don’t mind rolling up my sleeves, digging in, and taking a bunch of steps to fix it. Thanks a lot.

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  • How do I rsync an entire folder based on the existence of a specific file type in that folder

    - by inquam
    I have a server set up that receives movies to a folder. I then serve these movies using DLNA. But in the initial folder where they end up all kind of files end up. Pictures, music, documents etc. I thought I'd fix this by running the following script inside that folder rsync -rvt --include='*/' --include='*.avi' --include='*.mkv' --exclude='*' . ../Movies/ This works and scans the given folder and moves all the found movies of the given extension types to the Movies folder. But I wonder if there is anyway to tell rsync to if a folder if found that includes a movie of the given extension types, sync the entire folder. Including other files such as .srt. This is to make it easier for me to get subtitles moved along with the movie. I have a solution figured out via a script made in php (yea, I actually do most of my scripting in linux using php... just a habbit that stuck a long time ago). But if rsync can handle it from the start that would be super. Also, I have noticed that this line of rsync actually copies all the root folders in the given folder. If no movie is in the folder it will create an empty folder. How do I prevent rsync from doing this... and saving me the trouble of deleting all folder in Movies that are empty.

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  • PHP Not Automatically Updating With ?reload=1

    - by user32007
    A friend built a ranking system on his site and I am trying to host in on mine via wordpress and godaddy. It updates for him but when I load it to my site, it works for 6 hours, but as soon as the reload is supposed to occur, it errors and I get a 500 timeout error. His page is at: jeremynoeljohnson .com/yakezieclub My page is currently at http://sweatingthebigstuff.com/yakezieclub but when you ?reload=1 it will give the error. Any idea why this might be happening? Any settings that I might need to change? Here is the top of the index.php file. I'm not sure which part of any of it is messing up. I literally uploaded the same code as him. Here's the reload part: $cachefile = "rankings.html"; $daycachefile = "rankings_history.xml"; $cachetime = (60 * 60) * 6; // every 6 hours, the cache refreshes $daycachetime = (60 * 60) * 24; // every 24 hours, the history will be written to - or whenever the page is requested after 24 hours has passed $writenewdata = false; if (!empty($_GET['reload'])) { if ($_GET['reload']== 1) { $cachetime = 1; } } if (!empty($_GET['reloadhistory'])) { if ($_GET['reloadhistory'] == 1) { $daycachetime = 1; $cachetime = 1; } } if (file_exists($daycachefile) && (time() - $daycachetime < filemtime($daycachefile))) { // Do nothing } else { $writenewdata = true; $cachetime = 1; } // Serve from the cache if it is younger than $cachetime if (file_exists($cachefile) && (time() - $cachetime < filemtime($cachefile))) { include($cachefile); echo ""; exit; } ob_start(); // start the output buffer ?

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  • How to fix Windows 7 when System Recovery Options hangs?

    - by seansand
    The battery power ran out on my HP G60 laptop and it shut down. Even after recharging, Windows 7 will now not start up. After any attempted startup, it bluescreens and takes me to the "Startup Repair (recommended)" / "Start Windows Normally" console screen. "Startup Repair (recommended)" appears to be the right choice, but when I choose it, I get taken to a screen which appears to be System Recovery Options (it's the same wallpaper as the screenshots here: http://www.sevenforums.com/tutorials/668-system-recovery-options.html). However, I just get a cursor with nothing else; no "System Recovery Options" window ever pops up. (A black console screen does pop up for a split-second but too fast to be able to read the text.) The empty screen with cursor hangs indefinitely. System Recovery Options normally runs off of a partition on the laptop hard drive. When I got the laptop, I also created a System Repair Disc (in fact I have more than one) and when I try use any of them; they all result in the same wallpaper and empty screen with lone cursor. Ctrl-Alt-Del does nothing. The computer did not come with a Windows 7 installation disc, so there's no obvious way to reinstall Windows 7. Safe mode does not work; startup fails and I just get sent back to the "Startup Repair (recommended)"/"Start Windows Normally" console screen. "Start in last good state" does not work either, same result as above. Running a memory & hard disk check found no errors. Do I have any options at all? "System Recovery Options" seems to be what I want, but the screen that is supposed to take me to them just hangs.

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  • How to copy a floppy boot disk?

    - by Sammy
    I have a floppy boot disk and I would like to copy it to preserve it, as a backup. If I have two floppy drives, A and B, how can I copy the disk? Assuming one has two floppy drives Can I simply insert the floppy disk in one of the drives and then an empty floppy disk in the other and issue a simple command like this one. A:\>copy . b: Will this only copy the contents of the current directory and none of the files in subdirectories? Do I have to explicitly specify the option to copy everything? Also, what about the boot information? That won't get copied, right? If one has only one floppy drive... How do you copy a floppy disk if you only have one floppy drive? Do you in fact have to copy its contents to the local hard drive C and then copy that to an empty floppy disk using the same floppy drive? A:\>copy . c:\floppydisk A:\> A:\>c: C:\> C:\>copy floppydisk a: C:\> I'm guessing I will need some type of disk image tool to really copy everything on a bootable floppy disk. Something like the dd command on Linux perhaps? Am I right?

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  • Logging won't stop on log file after renaming/moving it.... how do I stop it?

    - by Jakobud
    Just discovered that logrotate is not rotating our firewall log. So it's up to 12G in size. I need to split up the file into smaller chunks and start manually rotating them so I can get things back on track. However before I start splitting the firewall up, I need to stop the firewall from logging to the current firewall log file and force it to start logging to a new empty file. This way I'm not trying to split up or rotate a log file that is still constantly growing. I tried to simply do this: mv firewall firewall.old touch firewall I expected to see the new empty firewall file to start growing in size, but no... the firewall.old is still be logged to. Then I tried to start/stop iptables. No change. firewall.old is still the log file. I tried to move it to another directory. That didn't help. I tried to stop iptables, then change the filename and create a new firewall file and then start iptables again, but no change. How do I stop the logging on this file and force it to start logging on a new file?

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  • Linux SFTP and many local user accounts, limits with mount --bind?

    - by user123428
    I am in the process of building a solution to handle many developers (possibly hundreds) to work on their files via sftp, each one Jailed in their home directory. For our particular needs, we have a samba mount point that contains all of the users home directories. I have started developing the following solution and hit some walls: - I have configured a Ubuntu Lucid Server as sftp server. - In order to jail the user in their home directory (without allowing them the browse a directory up and seeing all the other users folders) I am using mount --bind and not a symbolic link (also some ftp clients don't really work with sym links). - The user accounts are local unix user accounts on the sftp server (not using a directory service or anything) that have an empty home folder created on the local machine, then I use mount --bind to bind the empty folder to the actual users home directory on the samba share. With this solution I am hitting a couple of problems, in the case of a server reboot, all the mount --binds are lost because they are not written in fstab. Then I have read somewhere that the maximum amount of entries in fstab are 400 (which does not really help us). I have thought of a solution of writing something that stores the mounts in a text file as a backup and on server reboot, run the script that re mounts. I am just really unsure about this whole process and was wondering if anyone has any insight on possibly a better solution for SFTP? (not FTP)

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  • where are the default ulimit values set? (linux, centos)

    - by nomercysir
    I have two CentOS (5) servers with nearly identical specs. When I login and do: ulimit -u on one machine, I get unlimited and on the other, 77824 When I run a cron like * * * * * ulimit -u > ulimit.txt I get the same results (unlimited, 77824). I am trying to determine where these are set so that I can alter them. They are not set in any of my profiles (.bashrc, /etc/profile, etc .. these wouldn't affect cron anyway) nor in /etc/security/limits.conf (which is empty). I have scoured google and even gone so far as to do grep -Ir 77824 / but nothing has turned up so far. I don't understand how these machines could have come preset with different limits. I am actually wondering not for these machines, but for a different (CentOS 6) machine which has a limit of 1024, which is far too small. I need to run cron jobs with a higher limit and the only way I know how to set that is in the cron job itself. That's ok, but I'd rather set it system wide so it's not as hacky. Thanks for any help. This seems like it should be easy (NOT) EDIT -- SOLVED Ok, I figured this out. It seems to be an issue either with CentOS 6 or perhaps my machine configuration. On the CentOS 5 configuration, I can set in /etc/security/limits.conf: * - nproc unlimited and that would effectively update the accounts and cron limits. However, this does not work in my CentOS 6 box. Instead, I must do: myname1 - nproc unlimited myname2 - nproc unlimited ... And things work as expected. Maybe the UID specification works to, but the wildcard (*) definitely DOES NOT here. Oddly, wildcards DO work for the 'nofile' limit. I still would love to know where the default values are actually coming from, because by default, this file is empty and I couldn't see why I had different defaults for the two CentOS boxes, which had identical hardware and were from the same provider.

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  • Memory Usage by Mapped Files (Win7 64Bit)

    - by Dexter
    When copying files from/to my external USB3 HDD memory usage in Win7 goes up to 100% and remains there. I'm not sure whether this is a problem caused by faulty drivers or not, but I already have the current version of them (Etron USB3 controller on a Gigabyte 990fxa board).. Using RAMMap it becomes obvious that the files, that are to be copied, are mapped into memory. Clicking on Empty > Empty System Working Set seems to temporarily fix the problem (without causing any trouble with the file copy process), but it needs to be done every few seconds. Is there any way to schedule this operation to happen ever 10 or so seconds on its own? What underlying system command is RAMMap using? Or, alternatively, is there any way to limit how much RAM mapped files may use in Windows 7? I know mapped files would usually be removed from memory if other programs need the memmory, but while memmory usage is at 100% the system starts freezing up for half a second or so everytime I click anything .. thus the automatic removal of unused memory contents seems to be failing here.

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  • Multiple Components in a JTree Node Renderer & Node Editor

    - by Samad Lotia
    I am attempting to create a JTree where a node has several components: a JPanel that holds a JCheckBox, followed by a JLabel, then a JComboBox. I have attached the code at the bottom if one wishes to run it. Fortunately the JTree correctly renders the components. However when I click on the JComboBox, the node disappears; if I click on the JCheckBox, it works fine. It seems that I am doing something wrong with how the TreeCellEditor is being set up. How could I resolve this issue? Am I going beyond the capabilities of JTree? Here's a quick overview of the code I have posted below. The class EntityListDialog merely creates the user interface. It is not useful to understand it other than the createTree method. Node is the data structure that holds information about each node in the JTree. All Nodes have a name, but samples may be null or an empty array. This should be evident by looking at EntityListDialog's createTree method. The name is used as the text of the JCheckBox. If samples is non-empty, it is used as the contents of the JCheckBox. NodeWithSamplesRenderer renders Nodes whose samples are non-empty. It creates the complicated user interface with the JPanel consisting of the JCheckBox and the JComboBox. NodeWithoutSamplesRenderer creates just a JCheckBox when samples is empty. RendererDispatcher decides whether to use a NodeWithSamplesRenderer or a NodeWithoutSamplesRenderer. This entirely depends on whether Node has a non-empty samples member or not. It essentially functions as a means for the NodeWith*SamplesRenderer to plug into the JTree. Code listing: import java.awt.*; import java.awt.event.*; import java.util.*; import javax.swing.*; import javax.swing.tree.*; public class EntityListDialog { final JDialog dialog; final JTree entitiesTree; public EntityListDialog() { dialog = new JDialog((Frame) null, "Test"); entitiesTree = createTree(); JScrollPane entitiesTreeScrollPane = new JScrollPane(entitiesTree); JCheckBox pathwaysCheckBox = new JCheckBox("Do additional searches"); JButton sendButton = new JButton("Send"); JButton cancelButton = new JButton("Cancel"); JButton selectAllButton = new JButton("All"); JButton deselectAllButton = new JButton("None"); dialog.getContentPane().setLayout(new GridBagLayout()); GridBagConstraints c = new GridBagConstraints(); JPanel selectPanel = new JPanel(new FlowLayout(FlowLayout.LEFT)); selectPanel.add(new JLabel("Select: ")); selectPanel.add(selectAllButton); selectPanel.add(deselectAllButton); c.gridx = 0; c.gridy = 0; c.weightx = 1.0; c.weighty = 0.0; c.fill = GridBagConstraints.HORIZONTAL; dialog.getContentPane().add(selectPanel, c); c.gridx = 0; c.gridy = 1; c.weightx = 1.0; c.weighty = 1.0; c.fill = GridBagConstraints.BOTH; c.insets = new Insets(0, 5, 0, 5); dialog.getContentPane().add(entitiesTreeScrollPane, c); c.gridx = 0; c.gridy = 2; c.weightx = 1.0; c.weighty = 0.0; c.insets = new Insets(0, 0, 0, 0); c.fill = GridBagConstraints.HORIZONTAL; dialog.getContentPane().add(pathwaysCheckBox, c); JPanel buttonsPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT)); buttonsPanel.add(sendButton); buttonsPanel.add(cancelButton); c.gridx = 0; c.gridy = 3; c.weightx = 1.0; c.weighty = 0.0; c.fill = GridBagConstraints.HORIZONTAL; dialog.getContentPane().add(buttonsPanel, c); dialog.pack(); dialog.setVisible(true); } public static void main(String[] args) { EntityListDialog dialog = new EntityListDialog(); } private static JTree createTree() { DefaultMutableTreeNode root = new DefaultMutableTreeNode( new Node("All Entities")); root.add(new DefaultMutableTreeNode( new Node("Entity 1", "Sample A", "Sample B", "Sample C"))); root.add(new DefaultMutableTreeNode( new Node("Entity 2", "Sample D", "Sample E", "Sample F"))); root.add(new DefaultMutableTreeNode( new Node("Entity 3", "Sample G", "Sample H", "Sample I"))); JTree tree = new JTree(root); RendererDispatcher rendererDispatcher = new RendererDispatcher(tree); tree.setCellRenderer(rendererDispatcher); tree.setCellEditor(rendererDispatcher); tree.setEditable(true); return tree; } } class Node { final String name; final String[] samples; boolean selected; int selectedSampleIndex; public Node(String name, String... samples) { this.name = name; this.selected = false; this.samples = samples; if (samples == null) { this.selectedSampleIndex = -1; } else { this.selectedSampleIndex = 0; } } public boolean isSelected() { return selected; } public void setSelected(boolean selected) { this.selected = selected; } public String toString() { return name; } public int getSelectedSampleIndex() { return selectedSampleIndex; } public void setSelectedSampleIndex(int selectedSampleIndex) { this.selectedSampleIndex = selectedSampleIndex; } public String[] getSamples() { return samples; } } interface Renderer { public void setForeground(final Color foreground); public void setBackground(final Color background); public void setFont(final Font font); public void setEnabled(final boolean enabled); public Component getComponent(); public Object getContents(); } class NodeWithSamplesRenderer implements Renderer { final DefaultComboBoxModel comboBoxModel = new DefaultComboBoxModel(); final JPanel panel = new JPanel(); final JCheckBox checkBox = new JCheckBox(); final JLabel label = new JLabel(" Samples: "); final JComboBox comboBox = new JComboBox(comboBoxModel); final JComponent components[] = {panel, checkBox, comboBox, label}; public NodeWithSamplesRenderer() { Boolean drawFocus = (Boolean) UIManager.get("Tree.drawsFocusBorderAroundIcon"); if (drawFocus != null) { checkBox.setFocusPainted(drawFocus.booleanValue()); } for (int i = 0; i < components.length; i++) { components[i].setOpaque(true); } panel.add(checkBox); panel.add(label); panel.add(comboBox); } public void setForeground(final Color foreground) { for (int i = 0; i < components.length; i++) { components[i].setForeground(foreground); } } public void setBackground(final Color background) { for (int i = 0; i < components.length; i++) { components[i].setBackground(background); } } public void setFont(final Font font) { for (int i = 0; i < components.length; i++) { components[i].setFont(font); } } public void setEnabled(final boolean enabled) { for (int i = 0; i < components.length; i++) { components[i].setEnabled(enabled); } } public void setContents(Node node) { checkBox.setText(node.toString()); comboBoxModel.removeAllElements(); for (int i = 0; i < node.getSamples().length; i++) { comboBoxModel.addElement(node.getSamples()[i]); } } public Object getContents() { String title = checkBox.getText(); String[] samples = new String[comboBoxModel.getSize()]; for (int i = 0; i < comboBoxModel.getSize(); i++) { samples[i] = comboBoxModel.getElementAt(i).toString(); } Node node = new Node(title, samples); node.setSelected(checkBox.isSelected()); node.setSelectedSampleIndex(comboBoxModel.getIndexOf(comboBoxModel.getSelectedItem())); return node; } public Component getComponent() { return panel; } } class NodeWithoutSamplesRenderer implements Renderer { final JCheckBox checkBox = new JCheckBox(); public NodeWithoutSamplesRenderer() { Boolean drawFocus = (Boolean) UIManager.get("Tree.drawsFocusBorderAroundIcon"); if (drawFocus != null) { checkBox.setFocusPainted(drawFocus.booleanValue()); } } public void setForeground(final Color foreground) { checkBox.setForeground(foreground); } public void setBackground(final Color background) { checkBox.setBackground(background); } public void setFont(final Font font) { checkBox.setFont(font); } public void setEnabled(final boolean enabled) { checkBox.setEnabled(enabled); } public void setContents(Node node) { checkBox.setText(node.toString()); } public Object getContents() { String title = checkBox.getText(); Node node = new Node(title); node.setSelected(checkBox.isSelected()); return node; } public Component getComponent() { return checkBox; } } class NoNodeRenderer implements Renderer { final JLabel label = new JLabel(); public void setForeground(final Color foreground) { label.setForeground(foreground); } public void setBackground(final Color background) { label.setBackground(background); } public void setFont(final Font font) { label.setFont(font); } public void setEnabled(final boolean enabled) { label.setEnabled(enabled); } public void setContents(String text) { label.setText(text); } public Object getContents() { return label.getText(); } public Component getComponent() { return label; } } class RendererDispatcher extends AbstractCellEditor implements TreeCellRenderer, TreeCellEditor { final static Color selectionForeground = UIManager.getColor("Tree.selectionForeground"); final static Color selectionBackground = UIManager.getColor("Tree.selectionBackground"); final static Color textForeground = UIManager.getColor("Tree.textForeground"); final static Color textBackground = UIManager.getColor("Tree.textBackground"); final JTree tree; final NodeWithSamplesRenderer nodeWithSamplesRenderer = new NodeWithSamplesRenderer(); final NodeWithoutSamplesRenderer nodeWithoutSamplesRenderer = new NodeWithoutSamplesRenderer(); final NoNodeRenderer noNodeRenderer = new NoNodeRenderer(); final Renderer[] renderers = { nodeWithSamplesRenderer, nodeWithoutSamplesRenderer, noNodeRenderer }; Renderer renderer = null; public RendererDispatcher(JTree tree) { this.tree = tree; Font font = UIManager.getFont("Tree.font"); if (font != null) { for (int i = 0; i < renderers.length; i++) { renderers[i].setFont(font); } } } public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) { final Node node = extractNode(value); if (node == null) { renderer = noNodeRenderer; noNodeRenderer.setContents(tree.convertValueToText( value, selected, expanded, leaf, row, false)); } else { if (node.getSamples() == null || node.getSamples().length == 0) { renderer = nodeWithoutSamplesRenderer; nodeWithoutSamplesRenderer.setContents(node); } else { renderer = nodeWithSamplesRenderer; nodeWithSamplesRenderer.setContents(node); } } renderer.setEnabled(tree.isEnabled()); if (selected) { renderer.setForeground(selectionForeground); renderer.setBackground(selectionBackground); } else { renderer.setForeground(textForeground); renderer.setBackground(textBackground); } renderer.getComponent().repaint(); renderer.getComponent().invalidate(); renderer.getComponent().validate(); return renderer.getComponent(); } public Component getTreeCellEditorComponent( JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row) { return getTreeCellRendererComponent( tree, value, true, expanded, leaf, row, true); } public Object getCellEditorValue() { return renderer.getContents(); } public boolean isCellEditable(final EventObject event) { if (!(event instanceof MouseEvent)) { return false; } final MouseEvent mouseEvent = (MouseEvent) event; final TreePath path = tree.getPathForLocation( mouseEvent.getX(), mouseEvent.getY()); if (path == null) { return false; } Object node = path.getLastPathComponent(); if (node == null || (!(node instanceof DefaultMutableTreeNode))) { return false; } DefaultMutableTreeNode treeNode = (DefaultMutableTreeNode) node; Object userObject = treeNode.getUserObject(); return (userObject instanceof Node); } private static Node extractNode(Object value) { if ((value != null) && (value instanceof DefaultMutableTreeNode)) { DefaultMutableTreeNode node = (DefaultMutableTreeNode) value; Object userObject = node.getUserObject(); if ((userObject != null) && (userObject instanceof Node)) { return (Node) userObject; } } return null; } }

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  • Memory leak involving jQuery Ajax requests

    - by Eli Courtwright
    I have a webpage that's leaking memory in both IE8 and Firefox; the memory usage displayed in the Windows Process Explorer just keeps growing over time. The following page requests the "unplanned.json" url, which is a static file that never changes (though I do set my Cache-control HTTP header to no-cache to make sure that the Ajax request always goes through). When it gets the results, it clears out an HTML table, loops over the json array it got back from the server, and dynamically adds a row to an HTML table for each entry in the array. Then it waits 2 seconds and repeats this process. Here's the entire webpage: <html> <head> <title>Test Page</title> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js"></script> </head> <body> <script type="text/javascript"> function kickoff() { $.getJSON("unplanned.json", resetTable); } function resetTable(rows) { $("#content tbody").empty(); for(var i=0; i<rows.length; i++) { $("<tr>" + "<td>" + rows[i].mpe_name + "</td>" + "<td>" + rows[i].bin + "</td>" + "<td>" + rows[i].request_time + "</td>" + "<td>" + rows[i].filtered_delta + "</td>" + "<td>" + rows[i].failed_delta + "</td>" + "</tr>").appendTo("#content tbody"); } setTimeout(kickoff, 2000); } $(kickoff); </script> <table id="content" border="1" style="width:100% ; text-align:center"> <thead><tr> <th>MPE</th> <th>Bin</th> <th>When</th> <th>Filtered</th> <th>Failed</th> </tr></thead> <tbody></tbody> </table> </body> </html> If it helps, here's an example of the json I'm sending back (it's this exact array wuith thousands of entries instead of just one): [ { mpe_name: "DBOSS-995", request_time: "09/18/2009 11:51:06", bin: 4, filtered_delta: 1, failed_delta: 1 } ] EDIT: I've accepted Toran's extremely helpful answer, but I feel I should post some additional code, since his removefromdom jQuery plugin has some limitations: It only removes individual elements. So you can't give it a query like `$("#content tbody tr")` and expect it to remove all of the elements you've specified. Any element that you remove with it must have an `id` attribute. So if I want to remove my `tbody`, then I must assign an `id` to my `tbody` tag or else it will give an error. It removes the element itself and all of its descendants, so if you simply want to empty that element then you'll have to re-create it afterwards (or modify the plugin to empty instead of remove). So here's my page above modified to use Toran's plugin. For the sake of simplicity I didn't apply any of the general performance advice offered by Peter. Here's the page which now no longer memory leaks: <html> <head> <title>Test Page</title> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js"></script> </head> <body> <script type="text/javascript"> <!-- $.fn.removefromdom = function(s) { if (!this) return; var el = document.getElementById(this.attr("id")); if (!el) return; var bin = document.getElementById("IELeakGarbageBin"); //before deleting el, recursively delete all of its children. while (el.childNodes.length > 0) { if (!bin) { bin = document.createElement("DIV"); bin.id = "IELeakGarbageBin"; document.body.appendChild(bin); } bin.appendChild(el.childNodes[el.childNodes.length - 1]); bin.innerHTML = ""; } el.parentNode.removeChild(el); if (!bin) { bin = document.createElement("DIV"); bin.id = "IELeakGarbageBin"; document.body.appendChild(bin); } bin.appendChild(el); bin.innerHTML = ""; }; var resets = 0; function kickoff() { $.getJSON("unplanned.json", resetTable); } function resetTable(rows) { $("#content tbody").removefromdom(); $("#content").append('<tbody id="id_field_required"></tbody>'); for(var i=0; i<rows.length; i++) { $("#content tbody").append("<tr><td>" + rows[i].mpe_name + "</td>" + "<td>" + rows[i].bin + "</td>" + "<td>" + rows[i].request_time + "</td>" + "<td>" + rows[i].filtered_delta + "</td>" + "<td>" + rows[i].failed_delta + "</td></tr>"); } resets++; $("#message").html("Content set this many times: " + resets); setTimeout(kickoff, 2000); } $(kickoff); // --> </script> <div id="message" style="color:red"></div> <table id="content" border="1" style="width:100% ; text-align:center"> <thead><tr> <th>MPE</th> <th>Bin</th> <th>When</th> <th>Filtered</th> <th>Failed</th> </tr></thead> <tbody id="id_field_required"></tbody> </table> </body> </html> FURTHER EDIT: I'll leave my question unchanged, though it's worth noting that this memory leak has nothing to do with Ajax. In fact, the following code would memory leak just the same and be just as easily solved with Toran's removefromdom jQuery plugin: function resetTable() { $("#content tbody").empty(); for(var i=0; i<1000; i++) { $("#content tbody").append("<tr><td>" + "DBOSS-095" + "</td>" + "<td>" + 4 + "</td>" + "<td>" + "09/18/2009 11:51:06" + "</td>" + "<td>" + 1 + "</td>" + "<td>" + 1 + "</td></tr>"); } setTimeout(resetTable, 2000); } $(resetTable);

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