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• Multicast in private LAN with different subnets

  - by Gobliins

  after i read Multicast IP Addresses and Multicast accross the subnets I am confused. Configuration: I have two devices in the same network. They may not be in the same Subnet, but always in the same physical network (beyond the same router, switch etc.) I want to communicate across IP multicast either 224.x.x.x or 239.x.x.x may be more fitting because we want it local, not beyond of forward through the router. Can one machine be the receiver and the other machine sender of the same multicast address? and can the receiving machine send an answer to the sending machine?

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• How do I disable alert beeps

  - by wheresrhys

  My HP pavilion laptop is getting pretty old and the speakers no longer work properly. So I've disabled all audio devices, including disabling the light-touch volume controls at boot-up. The one sound still here that I can't get rid of is teh alert beep whenever there's an error. It's annoying at the best of times, but when your laptop has no other sounds at all it's intensly irritating! Nothing I change in the windows settings or in the BIOS seems to have any effect. Any ideas how to switch them off?

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• Can't access DD-WRT set in DHCP forwarder

  - by Chris Marisic

  This might sound amazingly stupid but I have a DD-WRT (micro) router that I placed in my network to act as a switch and as a WAP while relying on my cable modem to be the DHCP server. In my attempts to get the configuration right I put the router into DHCP forwarder which then made everything work correctly. The problem is now I can't seem to connect to the router in any fashion to add mac addresses to the WAP access list. Is there something I'm missing or do I need to try a hard reset on it and reconfigure everything?

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• Bluetooth radio device is not available

  - by Mike

  I reinstalled my Windows 7 operating system, and have since been unable to detect my Logitech m555b bluetooth mouse. Here is some info about my system: I have have a working connection with a bluetooth printer. I have a message in the "My Bluetooth" section of explorer stating "Bluetooth radio device is not available". The Device Manager indicates that the Generic Bluetooth radio is working correctly. The bluetooth "F12" switch is on. Mouse batteries are new and the right way around. I'm presuming that I need a bluetooth driver which is non generic. The computer is a Clevo P150HMx (the version with the GTX485 GPU) with the default WLAN / bluetooth combo card manufactured by Realtek (I think it's a Realtek RTL8188CE card). I think I have the drivers installed, but I still get the generic driver in the Device Manager. I'm confused. Please help, I'm going mad on the touchpad. (Thanks for the touchup wizlog)

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• Is there any way to hide taskbar labels and not combine taskbar buttons?

  - by Domchi

  There are three options for customizing taskbar buttons in Windows 7: Always combine, hide labels Combine when taskbar is full Never combine Is there any way to hide labels and not combine taskbar buttons? Or even better, to exclude only certain applications from combining? My main problem is that I switch a lot between two instances of a single application, and having to hover over combined icon and then choosing the correct one. Alt-Tabbing is not a good alternative when I'm switching between more than three applications; clicking on taskbar only once is what I'm looking for.

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• VGA resolution with Sony Bravia TV

  - by prestomation

  I just bought Sony Bravia KDL40S5100 tv. The VGA input is acting weird. I have a Gateway desktop with Windows 7 and Intel 945 graphics. I also have a laptop running Ubuntu 9.04. The TV will not display the gateway when the resolution is over 1360x768, I have to wait for it to time out and bring me back. The Intel driver even urges me to switch to the "recommended" 1920x1080. I just installed Win7 using this tv as the monitor. When the orginial welcome screen started after setup, it started me at 1080. I had to start in safemode to set a res that would work! When I plug my laptop into the TV, 1920x1080 works just fine. Any ideas? This laptop also has Win7, which I am going to try, but I haven't gotten a chance yet.

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• Setting up a linux server to share an internet connection.

  - by Skizz

  I in the process of reconfiguring my network. It is currently like this: internet - modem - wireless router - wired server/clients | |---- wireless clients but I need to move the router to get a better signal for the wireless clients. So, I'm looking at this: internet - modem - server - switch - wired clients | |---- wireless router - wireless clients How do I set up the server to enable this? Also, what set ups do the clients need. The server is Ubuntu 9.04 and the clients are a mix of Windows XP / 7, Ubuntu and printers. I believe this new set up will allow me to control access to the internet, which would be useful.

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• MySQL on a laptop for remote workers - MyISAM keeps corrupting

  - by Jonathon

  We have an application that is used by remote, mobile workers. It intalls WAMP (Server2Go) on a laptop and uses MySQL to store data locally. All tables are MyISAM. Once a day, the workers sync the database to our central server via HTTP scripts that query the data and post it to our site. The problem is that many of these laptop database tables are corrupting continually. It appears that MySQL acts like it saves the information (I don't get any query errors), but the table gets corrupt. I have to repair the table constantly (which removes several rows of data in the process). Does anyone have any ideas about how to work around this problem? Would it be wise to switch to InnoDB on the laptops? How about a different database system altogether. I have looked at MySQL Embedded, but it appears to be the same engine as the regular MySQL.

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• How Do I Change the Windows7 LAN Proxy Config from the Command Line

  - by david.barkhuizen

  In Windows7, Is it possible to define/change the proxy config from the command line ? So, using the gui, I would go: Start Control Panel Network and Internet Internet Options Connections LAN Settings and then - enable/disable the proxy - define IP:port of proxy server But I would like to rather do this from the command line (so that I can run the command from a batch-file with a shortcut key - enabling me to switch proxy configs using a short-cut, rather than having to wade through the MS wizard). I've looked at using netsh.exe to change the settings for WinHTTP, but this seems to be thr wrong thing to do, as the WinHTTP setting do not appear to be related to the LAN settings. Much appreciated folks.

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• Best way to bring a system down with a "maintenance" message?

  - by iftrue

  What's the best way to bring down an apache2/tomcat6 setup for maintenance? Specifically, apache2 can stay running, but tomcat needs to restart to accomplish a number of tasks. My initial thought is to change the root directory in the httpd.conf VirtualHost entry to point to a new location, then issue a force-reload command to direct traffic away from the actual tomcat application. After some period of time, I perform tomcat maintenance, switch the VirtualHost entry, and force-reload to begin directing traffic back. Is there a better way to do this? I'm looking to start work on a rather extensive web application, and my deployment procedure right now involves shutting everything down and bringing everything back up. Is there a better way to do this than what I've proposed?

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• Change the format of the date column in Thunderbird

  - by TheOmega

  I want to change the format of the "Date"-column in the messagelist in Thunderbird. For mails from today, I want to display only the time, not the date. For mails from before today, I want to display only the date, not the time. This is the same setup mutt uses. I know of the Date display format wiki article, which describes how to change the date format, but you can only switch between five predefined formats, and none of them is "Date only". I also know of the ConfigDate extension, but it's got the same limitations, you can't define a new date format.

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• Windows 7 systeminfo reporting incorrect System Boot Time?

  - by rdingwall

  I work 9-5 and switch my PC off when I leave the office each day. When doing timesheets I need to know what time I got to work, so I usually use cmd systeminfo for finding the System Boot Time. Since upgrading to Windows 7 however, it's started reporting bizarre numbers between 11pm-2am instead of 8-9am. Today it says it booted at 11:34pm last night! I checked the event log and there is no entries between when I shutdown at 5:30pm yesterday and booted around 8am this morning. Has anyone else encountered this?

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• Multi screen RDP in Windows 8.1 Enterprise

  - by bgs264

  I have just flattened my machine and installed Windows 8.1 Enterprise Edition. I have used the Hyper-V to create a virtual machine for my Software Development stuff, on my VM I have also installed Windows 8.1 Enterprise Edition. I want to have two screen support when using this VM (not using /span) Both the Hyper-V viewer and Remote Desktop give me a tickbox to "Use all my monitors for the remote session". However even with it ticked (and even when I tried the /multimon switch on the command line), I only get a single screen. Am I missing something - this should be supported in Enterprise edition, right? Is there some extra config I need to do on the RDP host? Forgive me if it's an obvious question, I'm more a developer and just stumbling through ;-) Cheers! Ben

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• Default file type supported by IHS web server

  - by SK

  Hello, We earlier used IIS web server. To redirect some URLs ending with .asp, we created a directory structure based on URL's to be redirected; wrote VB script in .asp files to redirect present page to desired page and placed these .asp files in appropriate directories. Finally copied this directory structure to the docroot of IIS webserver. Due to some reasons, we had to switch to IHS web server. As IHS does not support .asp files, we can't use same directory structure having .asp files to redirect our URLs. Please let me know the default file type that is supported by IHS webserver (as the default filetype supported in IHS is .asp). Thanks in advance! SK

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• How to start wuala on the linux commandline with auto login

  - by mit

  When i start wuala on the linux commandline like this, it logs me in and the folder is mounted: wualamcd login username password enableAutoLogin I can shut it down from another console typing wuala shutdown But how do I actually use the auto login that I just set using the enableAutoLogin switch? What is the command to start it again, so it logs in but does not need the password? I tried wualamcd login and wuala starts but no one gets logged in. Auto login in gui mode works fine. This is 32 bit linux with openjdk 6 JRE.

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• GNU Screen: Combining split-regions and full-screen sessions

  - by scrrr

  Let's say I have three sessions: 0, 1 and 2 I'm on session 0 and I press CTRL-A S to split the screen. Then I select session 1 for the bottom split region, while 0 is in the upper. Can I switch to session 2 and have it display in full-screen while 0 and 1 remain split? If I CTRL-A n to other sessions in a split screen it only changes the split-region. I want some sessions to be full-screen though. Is that possible?

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• Slight delay when switching modes in vim using tmux or screen

  - by Ton van den Heuvel

  Switching to and from insert mode in Vim is no longer instantaneous since I use tmux. After pressing Esc in insert mode, it takes a noticeable amount of time to actually get out of insert mode. After pressing Esc and any other key afterwards the switch is immediate, and the command for the key pressed after Esc is executed. Any idea what might cause this? The Vim configuration is not the problem as the delay does not occur when I run Vim outside tmux, so this is probably related to tmux somehow. I use gnome-terminal btw. Also worth noting, it seems I can not define key bindings in tmux for Esc, my plan was to bind Esc to: bind Escape send-keys ^[ Alas, it seems binding anything to Esc for tmux does not work. The same problem occurs in screen as well.

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• Redirect To Domain Before SSL Is Read

  - by Devin Dixon

  I had to switch servers and I want to redirect all SSL urls to the non-ssl site. The problem I am running into is the https site still throws invalid certificate error even through apache has the redirect implemented. <VirtualHost *:443> ServerAdmin [email protected] DocumentRoot /data/sites/www.example.com/main/ RewriteEngine on Redirect 301 / http://www.example.com SSLEngine on SSLCertificateFile /etc/httpd/ssl/www.examplecom/ssl-cert-snakeoil.pem SSLCertificateKeyFile /etc/httpd/ssl/www.example.com/ssl-cert-snakeoil.key ServerName www.example.com ErrorLog "logs/example.com-error_log" CustomLog "logs/example.com-access_log" common </VirtualHost> My question is, how can I do a redirect and avoid the invalid ssl certifcation error in the browser?

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• setting up a WGR614v7 behind a linux box

  - by commodore fancypants

  Here's the setup, I have an openSUSE box with 2 NICs, one goes to my home network router, the other has DHCP running and it attached to a wireless router. I'm trying to get this setup to work before I switch to the linux box as my home network router. My DHCP will offer the wireless router (a WGR614v7) an address, but anything that connects to the wireless router ends up with a APIPA address. I have all the firewalls on the wireless network turned off as well as the wireless router's own DHCP. The linux box isn't offering addresses to anything past the wireless router. Is this a problem with the router or my DHCP setup? For testing purposes, I have both NICs set in the internal zone and I've tried wireless and wired connections to the WGR614v7 both to no avail.

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• MAC to IP binding in ASA 5510 / SG 300-52

  - by Sampsa

  I am trying to configure a Cisco ASA 5510 to assign specific IP-addresses to specific MACs. Firmware on my ASA is 8.2(5). I have used this feature in our previous device (Cisco SA-520W). I have also read that this feature is (not yet) implemented. How do I work around this problem, if not by direct assignment? Do I need to specify fixed IP's on concerned devices themselves? I also have a SG 300-52 switch for our LAN. We cannot specify IP-addresses to ports, because we have further switches down the line. Thank you for your help!

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• Dual boot Windows 8 and Ubuntu?

  - by askvictor

  I've installed Windows 8 on a machine (lenovo x220 laptop) with Ubuntu 12.10 already installed on another disk. I am guessing that Windows 8 has convinced the laptop to switch to UEFI boot (rather than the BIOS boot that was there previously) as the Lenovo splash screen on startup now no longer has the options to interrupt the boot process (e.g. to choose the boot drive). Previously I had Windows 8 on one drive and Ubuntu on the other drive, so could choose my OS through the BIOS rather than through grub or other bootloader but now no longer have that option. How can I get back the option to boot Ubuntu? I would sort of prefer UEFI boot as it seems much faster than BIOS.

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• Trigger ZFS dedup one-off scan/rededup

  - by Jake Wharton

  I have a ZFS filesystems which has been running for some time and I recently had the opportunity to upgrade it (finally!) to the latest ZSF version. Our data doesn't scream dedup but I firmly believe based on small tests that we could gain anywhere from 5-10% of our space back for free by utilizing it. I have enabled dedup on the filesystem and new files are slowly being dedupified but the majority (95%+) of our data already exists on the filesystem. Short of moving the data off-pool and then recopying it back, is there any way to trigger a dedup scan of existing data? It doesn't have to be asynchronous or live. (And FYI there isn't enough room on the pool to copy the entire filesystem to another and then just switch the mounts.)

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• Hide taskbar labels without combining

  - by Domchi

  There are three options for customizing taskbar buttons in Windows 7: Always combine, hide labels Combine when taskbar is full Never combine Is there any way to hide labels and not combine taskbar buttons? Or even better, to exclude only certain applications from combining? My main problem is that I switch a lot between two instances of a single application, and having to hover over combined icon and then choosing the correct one. Alt-Tabbing is not a good alternative when I'm switching between more than three applications; clicking on taskbar only once is what I'm looking for.

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• Best practice on Linux servers and CPU/power throttling?

  - by Valentin

  I am running a couple of Debian 6 (2.6.32) and 7 (3.2) Linux servers and all of them have energy saving settings enabled in their BIOS. Furthermore Linux shows that the CPUs are throttled if the servers are idling. I wonder if this could cause any harm - could there be e.g. performance impacts because Linux would not be able to handle throttling correctly? Is there a best practice for Linux servers and power/CPU throttling? Do you guys switch your energy profiles to "performance" or do you leave both the BIOS and the OS with their default settings? The reason I am asking is that I encountered several performance issues on physical Dell servers although all values (CPU/load, memory, I/O, network etc.) seemed to be normal. After changing the BIOS power settings to "performance" in those specific cases, I was able to get rid of the performance issues.

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• Wireless DHCP doesn't work until wired Ethernet plugged in

  - by MT_Head

  A client of mine has an Asus R1F tablet running Windows XP Tablet SP3. It has an Intel 3945ABG wireless card; wired Ethernet is a Realtek something-or-other. In the past few days, it's developed an odd problem: WiFi authenticates, but can't get an address via DHCP. plug in wired Ethernet - both interfaces get good addresses unplug cable, WiFi continues to work until shutdown. Next morning, repeat process. I've tried: turning WiFi off/on (there's a slider switch) disabling/re-enabling via Device Mangler uninstalling and reinstalling the driver for the 3945ABG... changing from Intel Pro/SET to Windows Wireless Zero Config (and back) restarting the router changing the static DHCP assignments at the router upgrading the router firmware, just on general principles The router/access point is pfSense 1.2.3RC1 (was 1.2.2); wireless card is Atheros-based. None of the 12 other users (5 with tablets) are having problems.

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