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Search found 1981 results on 80 pages for 'trick jarrett'.

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• 'Singleton' application - or let the user only launch one instance of a program at the time

  - by Disco

  I'm running a few linux desktops; mainly for kids (yeah, trying to teach them the right OS at early stage) (running Ubuntu 10.10, Gnome) The problem is that they found very funny to make their workstations (actually, old 512 Mb pentium 4) by launching thousands of firefox instances. I'm looking for a way to restrict them to launch 'N' instances of a particular application. Haven't figured yet how. Thought of a monitoring daemon but I think that would be too ressources hungry. Any idea of a script/trick to achieve this ? Note: i might have 1-2 level of users (the kids, and the more grown up kids) so i have also to limit per user; something like user1: 3firefox, user2: 2firefox instances.

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• Enable a program in Windows to run multiple times?

  - by user135490

  I've got this legacy software that only allows you to run one copy at a time, it detects that you have another session opened and it won't allow you to open a second instance. The problem is this is a cpu intensive program and it only use a single core. Is there any hacks or tweaks so I can trick it and open more than one instance? This would allow me to retire about 5 servers... I'm using Windows 2008 R2. I had to use cff explorer to enable the use more than 2GB RAM as the program crashes when it tries to use more than 2GB.

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• How to turn ON bluetooth in Dell Inspiron?

  - by ykombinator

  I bought a new Dell Inspiron laptop a month ago. The company had pre-installed all the required software in my laptop. As such, the bluetooth used to be switched ON whenever I switched on my machine. However, a few days later, the bluetooth stopped working. I re-started the Laptop and it was ON! Now I am facing this problem very frequently. As such, the wi-fi connection doesn't work unless the bluetooth is switched ON. The bluetooth turns ON after a few re-boots and sometimes doesn't turn ON for many days. Does anybody know any trick to keep the bluetooth ON everytime I switch ON my machine. P.S: The Dell manual did not help.

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• how to google a symbol keyword like "$?"

  - by ZhengZhiren

  i saw a trick in a book: in a linux shell, we can use &? to get the return value of a command. For example,we run a command,if it exit normally, the return value is 0. And then we type $?,we will get 0 in the screen. i want to google this kind of usage, so i have to type these two symbol $? in the search blank.But the search engine just return nothing to me... i have looked at the google help page, but still can't find a solution. so my question is: how can i search with this kind of keyword. or if you can give me some advise of the usage of $? or sort of thing, that will be also appreciated.

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• Proxying/Tunneling IPSec traffic via netcat or SOCKS?

  - by MattC

  I have a client that is using a SonicWall router as their VPN concentrator. I downloaded the client software and set up the router as a peer. My issue is that my company uses a dual DMZ setup, meaning we have an interior firewall, then a bunch of DMZ servers, then an external firewall, then finally the telco router. In this setup, the interior firewall has no way to communicate with the exterior firewall since they are on two totally separate subnets. The communication occurs through the servers that straddle the networks. In this case, I need some way to forward the ISAKMP/IPSec traffic from my desktop out to the Internet. My usual trick of using netcat on the intermediate proxy server doesn't work here since it's not TCP/UDP traffic as far as I can tell. All of my previous experience with VPN's have been using SSL-based VPN's which are clearly very easily proxy-able. Any help would be appreciated, thanks!

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• How to login without entering username and password

  - by torbengb

  I'm a newbie running Ubuntu 9.10. I have two users (wife and me), and each user's screensaver is set to lock so that on wakeup, we get to choose which user's desktop to go to. However, Ubuntu requires a password, so this is pretty tedious. I'd like to switch users without entering any password. I know about this trick that works for the boot login, but it doesn't deal with multiple users. Is it possible to set empty passwords for users in Ubuntu, or skip the password in other ways? (I'm expecting real Linux users to suggest that passwordless users must not get any rights and there be an admin user with a strong password. Yes, you're right. But that's not what this question is about. Thanks.)

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• table alias (or 'symlink') in mysql

  - by andreash

  Hi there, in MySQL5.1, is there a way to make one table accessible by two different names? I'm thinking about somethink like a symlink on linux filesystems. I know theres the CREATE VIEW myview AS SELECT * FrOM mytable thing, but I don't only need to SELECT from both names, but also delete etc ... You might ask why I want to do this? It's about getting a commercial, closed-source app to work, which is crappily programmed (usually, the table names are all lower-case, but occasionally, they use capitalized names for the same table ...). Oh, that would be another idea: Is there a way to tell MySQL not to care about capitalization of table names (like on Windows filesystems?)? that would also do the trick ... Thanks for your insight! A.

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• What happens if a server never receives the RST packet?

  - by Rob

  Someone recently decided to show me a POC of a new Denial of Service method using SYN/TCP he's figured out. I thought it was complete nonsense, but after explaining to him about SYN-SYN/ACK-RST, he left me speechless. He told me "what if the server you're using to trick into sending the SYN/ACK packets can't receive the RST packet?" I have no idea. He claims that the server will continue trying to send SYN/ACK packets, and that the packetrate will continue to build up. Is there any truth to this? Can anyone elaborate? Apparently, the way it works is this: He spoofs the IP of the SYN packet to the target's IP. He then sends the SYN packet to a handful of random servers They all reply with their SYN/ACK packet to the target IP, of course The target responds with RST, as we know BUT somehow he keeps the target from sending the RST or keeps the random servers from processing it With this, apparently the servers will continue trying to send the SYN/ACK packets, thus producing a somewhat of a "snowball" effect.

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• Setting up Amazon Cloudwatch to get an alert when you server is down

  - by Saif Bechan

  I have an instance running on Amazon EC2 that I turned into a webserver. Now I have been looking at cloudwatch, but I do not know if it is the correct tool for the job. Basically I want to get informed when the server is down, for whatever reason. Maybe the server got hacked, or the server shut down for whatever reason, I want to get a notification on that. I have enabled clouwatch, and tried to set up a alert, but I only see things like network in-out or cpu usage, an d metrix. Now I do not know if these will do the trick.

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• Constantly visible notification and access icon for Empathy in Gnome 3

  - by aef

  Since a short while I'm using Ubuntu Oneiric Ocelot (11.10) with gnome-shell (Gnome 3) and I'm trying to get accustomed to the default Empathy Instant Messaging client. One mayor problem for me (coming from Gnome 2 and Psi) is that there is no constantly visible icon which makes it clear (for example by changing its icon or showing an animation) if there are incoming messages which I did not read already and which lets me jump into them with one click. Also I'm missing a way to bring up the contact list or hide it away with a click. I sometimes have real problems even figuring out how to even open the contact list up again. Is there a Gnome 3 extension or some other trick available to display such a notifier in the top bar? I'm talking about something just like the sound and network controls which are already located there. I know that there are notifications in the lower notification area (former system tray), but as it is only visible as I move the mouse in the lower right corner of the screen, its useless for me.

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• Is there a convenient method to pull files from a server in an SSH session?

  - by tel

  I often SSH into a cluster node for work and after processing want to pull several results back to my local machine for analysis. Typically, to do this I use a local shell to scp from the server, but this requires a lot of path manipulation. I'd prefer to use a syntax like interactive FTP and just 'pull' files from the server to my local pwd. Another possible solution might be to have some way to automatically set up my client computer as an ssh alias so that something like scp results home:~/results would work as expected. Is there any obscure SSH trick that'll do this for me? Working from grawity's answer, a complete solution in config files is something like local .ssh/config: Host ex HostName ssh.example.com RemoteForward 10101 localhost:22 ssh.example.com .ssh/config: Host home HostName localhost Port 10101 which lets me do commands exactly like scp results home: transferring the file results to my home machine.

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• Screen rotation hot key (CTRL+ALT+UP) not responding, what's going on?

  - by Jamie

  The other day my son (11 months) discovered a new hot key combination on my laptop. As I'm sure many of you are aware (I wasn't until the other day), on machines with Intel Graphics, pressing CTRL+ALT+{any arrow key} rotates the screen. After I recovered from my shock, and did a little sideways Googling to figure out how to fix it, I decided this might actually be useful. I read a lot of online documentation, and it fits better on the screen when it's rotated. Since it's a laptop, I hold the machine like a book and read it. It worked great all afternoon yesterday. But today at work I tried to show a friend this new trick, using the same laptop, and found that the CTRL+ALT+UP no longer works. I can rotate it to any orientation but the normal one. I'm guessing something else is intercepting this hot key, but what could be doing this?

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• Prevent Windows Exporer to extract metadata

  - by olafure

  Windows Explorer (windows 7 x64) crashes when it sees allegedly corrupted .wav files. I'm dealing with this problem and the hotfix doesn't work for me: http://support.microsoft.com/kb/976417/en-us The hotfix says that this happens if the .wav file is corrupt (which btw I don't think it is). What makes this even worse is that I can't access the file in any program! As soon as the open dialog sees the file, windows tries it's metadata extraction trick and exporer.exe halts. So my question: Can I by any means tell windows to stop this "metadata extraction" action ? (I have seen multiple problems associated with it in the past).

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• Get into the router setting without knowing the password [on hold]

  - by Aron

  So my father has changed the router passwords, and programed the router to turn my wifi connection off automaticly at some times, for example at night. I wanted to know if there is any way I can trick this feature? Can i change my ip in some way, the router won't recognize my ip, so my new ip would have internet connection? Is it any way i can get into the router settings and turn that feature off without knowing the router password? Would be happy if I could get replies as soon as possible!

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• Renaming an Invalid Filename in NTFS

  - by Sadeq Dousti

  Recently, I loaned my flash disk to one of my friends, who had Mac OS. He copied a file on it, whose name included a backslash (\). The flash disk is NTFS formatted. Windows does not allow such filenames, and neither opens the file, nor deletes it, nor lets me delete the file. There are naive approaches to this problem, like: Formatting the flash disk; Giving it back to my friend and asking to rename it; Loading into some live Linux and renaming it. However, I'm looking for something more clever, like a program that can do the trick under Windows. PS: There's a tool called NTFSWalker which can browse the MFT records of the NTFS, but is unable to make any changes to them.

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• Installing Windows on multiple computers

  - by Rob

  At our work we've decided to buy SSDs to speed up our computers. We'd also like to upgrade from Windows 7 to Windows 8.1 (read clean install) I'm talking about 10 computers which going to have a fully clean installation. Is there any trick I can use to avoid installing Windows 10 times? The computers (most of them) are different in hardware, so I think duping is no good option. What can I do? I'd like to spend as less time as possible because all computers are going to need SQL Management Studio and Visual Studio 2012/2013. Thanks!

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• Refreshing Windows Media library by command line

  - by dangowans

  Many file download managers allow you to run a command after your download finishes. Is there a command line to run a Windows Media Player 12 library refresh? Videos don't show up in the available list on my PS3 until the library is refreshed. Right now, I manually open Windows Media Player after the downloads finish, watch the bottom-right corner for the refresh to complete (ie. Update Complete), then close the player. This works, but there has to be a better way. Yes, I know PS3 Media Server would do the trick, and I do use it when I need to transcode something, but WMP is running all the time, so I'd like to take advantage of it.

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• Throwing TRIM support in Ubuntu guest at Win7-Virtualbox host

  - by user141472

  I have VirtualBox 4.1.14 on Windows 7 as host, and Ubuntu server 11.10 as guest. System was installed at traditional HDD years ago (and upgraded later), but now it's at SSD as expanding drive. There is "AHCI" and "it's SSD" features enabled in SATA controller. Problem is, this expanding drive growth to it's almost max size (90% of it), but actually in VM only about 50% spent. Also, guest VM does not recognize /dev/sda as SSD, /sys/block/sda/queue/rotational says "1", /sys/block/sda/queue/discard_* all says "0". And, of course, I cannot run fstrim /, it says that operation not supported. Is there some trick to enable TRIM support in my guest system without reinstalling it?

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• Windows 7 RDP Fullscreen mode

  - by kubal5003

  I have a problem with remote desktop connection in Windows 7. When I connect to remote computer I would like to switch to fullscreen like I did in previous versions - just by clicking maximize. When I was in fullscreen mode and I moved the mouse to the upper border of the screen a nice bar appeared and I could minimize rdp or close it. In Windows seven when I click on the maximize button the window maximizes like a normal window - menu start/taskbar(whatever you call it) is still visible and because the resolution of the rdp client desktop is set like on the computer that I'm using it's not fully visible and scrollbars appear. That's really annoying. Can anyone tell me what to do? Is it a bug or maybe there is a "magic shortcut" that is poorly documented and does the trick? (I was trying to find it myself first ofcoz, but no result)

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• Can we change control of two keys on keyboard?

  - by mr_eclair

  I'm using Eliteook 8440p hp machine and two keys on my keyboard aren't working v and b. laptop keyboard replace will take 2-3 days, and I can't stop my office work. I'm bored of using On screen keyboard to write v and b. I don't have any portable USb keyoard to connect to laptop right now. I'm thinking I'm not using Pg up and Pg Down button at all, is there any software or trick which can make it possible so that If i press Pg Up it will write v on page and Pg Down will write b. Hoping for quick and positive response.

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• Viewsonic Monitor Resolution - Drivers are not working

  - by ravidev

  I have Viewsonic va1716w monitor which has VGA/D-SUB video input. I bought new Motherboard Intel DH67GD which has HDMI & DVI output. I connect my motherboard to monitor using DVI to VGA connector. It's working. Yesterday I installed windows 7 OS and also installed monitor drivers(downloaded from viewsonic site - signed version) When i set display resolution to 1440 x 900. It's not setting it.it sets back to 800x600. What should i do to make resolution to 1440x900 (monitor resolution)? DVI to VGA causing this problem or i need to do any trick? Any link to download drivers Please guide me.. Thanks in advance !!

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• Backing up to smaller drive

  - by Dave

  In a few hours I'll have a new 500GB Sony laptop, filled with the usual Sony rubbish which I'll promptly be replacing with Ubuntu or Crunchbang or something. However, first I want to make a full clone of the drive (including recovery partitions), should I wish to return it to Sony or sell it on in its factory state. The problem is that the only backup drives I have are less than 500GB - the biggest I have is 250GB or so! So I need to backup and compress on-the-fly. What's the best way to do this? Presumably dd piped into gzip would do the trick, or does anyone have any other suggestions to accomplish this?

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• Clearing Windows file share "memory"

  - by Tom Shaw

  I'm currently upgrading a Samba file server (from 3.0.23d to 3.4.3). I have a problem on the Windows client side: if the client was accessing a UNC path or mapped drive from the Samba server before the upgrade, then after the upgrade those paths or drives are not accessible. However, I can consistently resolve the client side problem for good by rebooting the client and then re-mapping all of the mapped drives. The problem appears to be related to the client's "memory" of the pre-upgrade Samba server, which the reboot and re-map clears. I have the same issue and same fix on Windows XP SP3 and Windows Server 2003 SP2. This question is specifically: is it possible to reproduce the benefits of the Windows reboot without actually rebooting the client? I have tried restarting various Windows services, disabling and enabling the network, logging out and back in again, but nothing except a reboot appears to do the trick.

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• How to move a partition to the end in gparted?

  - by matnagel

  I can't find a way to move the partition /dev/sdb2 to the end, where 12GB are free http://dl.dropbox.com/u/3358699/permanent/gparted-sdb.png I can resize (expand) the partition, but not create (insert) any free space in front of it. How to do the trick? (There are 2 small black arrows on the top of the popup window in the screenshot at the side of the blue box that represents the 400 GB sdb2 - I can only move the right arrow to the right, which extends the size, but I cannot move the left arrow. When I enter something in the free space preceding box it is always reset to zero by the programm immediateley) I hope I explained this well enough, please feel free to ask for details. This is serious for me as I am expanding a live image. Maybe there is another solution with linux commandline tools ?

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• VLC stream with trickplay

  - by marjasin

  The idea is to start a video stream from one computer and watch it on another with the ability to start/stop the stream. I think I could do this with VLC but i haven't been able to figure out how. I've tried the following: (From the official forum) Stream with RTSP and RTP: on the server, run: % vlc -vvv input_stream --sout '#rtp{dst=192.168.0.12,port=1234,sdp=rtsp://server.example.org:8080/test.sdp}' on the client(s), run: % vlc rtsp://server.example.org:8080/test.sdp But this doesn't give me the ability to start/stop the stream from the client. According to the VLC release note something called "Trick play" was added in version 1.0. This seems to be what I'm looking for but i can't find any documentation that descibes how to use it.

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