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• Stop a particular key getting captured by rdesktop

  - by user18151

  Hello, I want F12 to be not capture by my rdesktop while in fullscreen, so that I can do whatever stuff I'm doing on my remote Windows computer, but pressing F12 would bring down yakuake, and I can type down my commands, or use vim etc for whatever I'm doing. Is there any possible way to do this? I tried playing with keymaps, but that didn't help. I set F12 to inhibit, but that seems to have stopped sending F12 altogether, rather than let gnome catch it and let yakuake pop up. Would be really grateful for answers. I am ready to do my homework, if someone could please just give me pointers etc. Thanks :). Sidenote: My current arranement stems from my large monitor in lab, and small personal laptop monitor, and the laptop has Windows 7. My lab computer has Linux, on which I do my coding work.

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• Finding out if an IP address is static or dynamic?

  - by Joshua

  I run a large bulletin board and I get spammers every now and again. My moderation team does a good job filtering them out but every time I IP ban them they seem to come back (I'm pretty sure it's the same person on some occasions, as the post patterns are exactly the same as are the usernames) but I'm afraid to ban them by IP address every time. If they are on a dynamic IP address, I could be banning innocent users later down the line when they try to get to my forum through SERPs, but if I ban only via static IPs I know that I'm only banning that one person. So, is there a way to properly determine if an IP address is static or dynamic? Thanks.

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• Is there any way i can remove line breaks (not paragraph breaks) from a word document quickly?

  - by metal gear solid

  Is there any way i can remove line breaks (not paragraph breaks) from a word document quickly? i have a large document in columns like this: xxxxx x xxxx xxx xxxx xx xxxxxx x xxx x xx xxxxxxx xx xxxxx xxx xxxxx x xxxx xxx xxxx xx xxxxxx x xxx x xx xxxxxxx xx xxxxx xxx xxxxx x xxxx xxx xxxx xx xxxxxx x xxx x xx xxxxxxx xx xxxxx xxx and i need to remove the line breaks so it's like this xxxxx xxxxxx xxxxxxx xxxxxx xxxxxx xxxxxxxx xxxxxx x xxxx xx xxxx xxxx xxxxxxxxxxx x xxxxxxxx x x xxxxxxxxxxxxxx xxxx xxx xxxx xxxxxx xxxxx xxxxxx xxxxxxx xxxxxx xxxxxx xxxxxxxx xxxxxx x xxxx xx xxxx xxxx xxxxxxxxxxx x xxxxxxxx x x xxxxxxxxxxxxxx xxxx xxx xxxx xxxxxx xxxxx xxxxxx xxxxxxx xxxxxx xxxxxx xxxxxxxx xxxxxx x xxxx xx xxxx xxxx xxxxxxxxxxx x xxxxxxxx x x xxxxxxxxxxxxxx xxxx xxx xxxx xxxxxx

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• Apache stopping downloads part way through

  - by Ben Smiley

  On my site there are some digital files which can be downloaded through a PHP script. The script works fine for small files but large files i.e. 115MB cannot be downloaded successfully. The connection dies after around 15 minutes but it's not consistent - sometimes longer sometimes shorter. I don't think it's a problem with the script timing out because the download time isn't consistent. Equally it doesn't seem like a memory limit problem because the amount downloaded varies each time. Does anyone know of any Apache or PHP related settings which could cause this kind of problem?

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• AWS ELB as backend for Varnish Accelerator

  - by addisonj

  I am working on a large deployment on AWS that has high uptime requirements and variable loads throughout the day. Obviously, this is the perfect use case for ELB (Elastic Load Balancer) and autoscaling. However, we also rely on varnish for caching of API calls. My initial instinct was to structure the stack so that varnish uses ELB as a backend which in turn hits an appGroup. Varnish -> ELB -> AppServers However, according to a few sources that isn't possible as ELB constantly changes the IP address of its DNS hostname, which varnish caches on start, meaning changes to the IP won't be picked up by varnish. Reading around however, it looks like people are doing this so I am wondering what workarounds exist? Perhaps a script to reload the vcl periodically? In the case of where this is really just not a good idea, any idea of other solutions?

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• I need a relatively cheap host, which will be able to handle sudden peaks in traffic?

  - by Morten K

  Hello, We're launching a product in a few months, which will obviously have a website. Judging from our current traffic, we believe that overall traffic will probably not be that much, but we are aiming at promoting the site heavily using social media. This has the typical problem, that IF we get suddenly get picked up by a large tech blog, we will see a sudden burst: A very heavy increase in traffic all of the sudden. If we use a cheap charlie host as our current host is (www.unoeuro.com) or something similar like GoDaddy, I'm afraid that the site will go down under the load. If that happens, then we might as well have thrown our social media marketing dollars out of the window. Our site will be relatively lightweight, all videos hosted at Youtube or Vimeo and other than that mainly just a standard webpage (ie nothing too heavy). I am hoping for recommendations for a good hosting company, which has some form of scalable hosting, so if / when a traffic surge hits, the site will not go down.

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• Create netbook recovery image without DVD burner (virtual burner?)

  - by Dan

  I have a new Acer Aspire One which is asking to create a recovery DVD. It doesn't have a built in burner, and I don't have a USB burner. However I do have a large USB hard drive. Is there some way to get the recovery software to "burn" an image file instead of a real DVD? I know you can download a Linux recovery image, but the netbook comes with XP. I plan to install Linux on it but I'd like an XP recovery image just in case.

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• Coldfusion 8 Application Crashes Under Heavy Load

  - by KM01

  Hello, We have a CF8 app that runs for 20-25 minutes before crashing under heavy load ~ 1200 users. This load is generated by our load testing tool: 1200 users ramped up in 5 mins (approx behavior of our users), running for an hour. We have this app on Solaris 10, Apache 2, JRun 4 and Oracle 10g. Java version is 1.6. During the initial load tests, the thread dumps pointed to monitor deadlocks that pointed to sessions. "jrpp-173": waiting to lock monitor 0x019fdc60 (object 0x6b893530, a java.util.Hashtable), which is held by "scheduler-1" "scheduler-1": waiting to lock monitor 0x026c3ce0 (object 0x6abe2f20, a coldfusion.monitor.memory.SessionMemoryMonitor$TopMemoryUsedSessions), which is held by "jrpp-167" "jrpp-167": waiting to lock monitor 0x019fdc60 (object 0x6b893530, a java.util.Hashtable), which is held by "scheduler-1" We increased the number of sessions relative to the number of CPUs (48 simultaneous threads against 32 CPUs), and the deadlock went away. While varying the simultaneous threads helped a little bit in terms of response time, the CF server still tanked in 20-25 minutes during all of these tests. We ran more thread dumps, and saw a thread locking a monitor, for e.g.: "jrpp-475" prio=3 tid=0x02230800 nid=0x2c5 runnable [0x4397d000] java.lang.Thread.State: RUNNABLE at java.util.HashMap.getEntry(HashMap.java:347) at java.util.HashMap.containsKey(HashMap.java:335) at java.util.HashSet.contains(HashSet.java:184) at coldfusion.monitor.memory.MemoryTracker.onAddObject(MemoryTracker.java:124) at coldfusion.monitor.memory.MemoryTrackerProxy.onReplaceValue(MemoryTrackerProxy.java:598) at coldfusion.monitor.memory.MemoryTrackerProxy.onPut(MemoryTrackerProxy.java:510) at coldfusion.util.CaseInsensitiveMap.put(CaseInsensitiveMap.java:250) at coldfusion.util.FastHashtable.put(FastHashtable.java:43) - locked <0x6f7e1a78> (a coldfusion.runtime.Struct) at coldfusion.runtime.CfJspPage._arrayset(CfJspPage.java:1027) at coldfusion.runtime.CfJspPage._arraySetAt(CfJspPage.java:2117) at cfvalidation2ecfc1052964961$funcSETUSERAUDITDATA.runFunction(/app/docs/apply/cfcs/validation.cfc:377) As you see in the last line above there were several references CFMs and CFCs, and the lines have "cflock" tags, which were scoped to the "application." We (the dev team) then changed them to be scoped to a "name". After more load tests, there is no locking going on and there no deadlocks, but now the application tanks in 7-10 minutes. We've gotten system, network and DB reports from the respective admins, and they are not being taxed; even watched the server stats with server monitor, top, prstat, ran sar reports, etc. So we believe it is an issue with the CF server or maybe the JVM. I am running out of ideas as to what else we can try. Disclaimer: I am not a CF developer or Admin. I am just running the load test, analyzing the reports, threads etc, and sharing the results with the dev and admin teams, and trying the next change, and so on. So far no dice. Has anyone run into something similar? How did you go about diagnosing and troubleshooting? All thoughts and pointers welcome. Thank you for your time! KM

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• Why is my Wifi connection slower than ethernet even though bandwidth should saturated?

  - by supercheetah

  I'm wondering why it is that my wireless connection is slower than my wired connection for things going to the outside world (so, not files being transferred within the network), which is should be faster than the outside connection, which, I would think, would mean that downloading something like an ISO or other large file from the Internet should be the same either way since that should saturate the connection anyway. Does it have something to do with the encryption (WPA)? Could it have something to do with MTU since the MTU for ethernet can be in the range of 1500 to 9000 bytes, and 2304 bytes for 802.11? Do wireless packets have to be buffered, whereas this wouldn't be an issue with ethernet? What's the math behind the difference?

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• Does an unmanaged 4/8-port GBit Ethernet switch with a GBIC port exist?

  - by Aaron Digulla

  I'm looking for a simple unmanaged switch with 4-8 GBit Ethernet ports and a fiber port (either as a GBIC slot or pre-installed with a 1000BASE-SX port). Does something like that exist? [EDIT] I want to connect to places in my home without drilling large holes though the floors. Therefore, I'm looking for a cheap way to connect two GBit switches via fiber. I tried with a media converter (GBit <- multimode fiber) but that costs about 50% throughput. So I was hoping that there is a cheap, small GBit switch which has a GBIC slot). All I found so far are very expensive managed switches with 12 or 24 ports for industry use.

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• Free, Linux-based rescue CD for Windows machines

  - by Adam Matan

  Hi, Too often, I'm being called to help a friend who screwed a Windows machine by some creative methods. Th usual remedy is backing up the hard drive contents and reinstalling. Right now, this is done by removing the defected hard drive to my machine. I figured out that using a rescue disk running some version of Linux might ease the process. I'm looking for: NTFS access Partition tools Large variety of drivers (Network, Hard drives, etc.) GUI and some rescue wizards a great plus. Any ideas? Adam

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• PSAD Firewall/ UDP flood?

  - by Asad Moeen

  Well I'm actually trying to block a UDP Flood on the Application port because the string "getstatus" is causing my application to make large output due to a small input to the attacker's IP. I installed PSAD firewall to do the job. psad -S shows 3000,000 logged packets at the application port and top ports in Scan but does not block the IP of the attacker however other IP Addresses with small number of connections are dropped. I'm thinking that since output is also being made to the attacker, this is why its not getting blocked because iptables rate-limiting is also exactly doing the same thing and not blocking the IP where outgoing connection is also made. Any guesses why it won't work?

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• wget not converting links

  - by acrosman

  I am trying to mirror a fairly large site (20,000+ pages) prior to a major overhaul. Basically, I need a backup before cutting over to the new one in case we forgot something we need (we'll have about 1,000 pages at launch). The site is run on a CMS that I cannot easily extract usable data from, so I'm trying to make the copy with wget. My problem is that wget does not appear to be actually converting links, despite the presence of --convert-links or -k in the command. I've tried a couple of different combinations of flags, but I haven't been able to get the output I need. Most recent failed attempt was: nohup wget --mirror -k -l10 -PafscSnapshot --html-extension -R *calendar* -o wget.log http://www.example.org & I've also included the --backup-converted, and --convert-links instead of -k (not that it have mattered). I've done it with and without -P and -l, again no that they should matter. Results in files that still have links like: http://www.example.org/ht/d/sp/i/17770

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• Mass remove passwords from rar archives

  - by ldigas

  Is there a way to (I'm using WinRAR; demo, but I'm willing to change it to whatever is needed) mass remove passwords from a bunch of files ? Problem description: for reasons unknown to me, some archiving was done for two-and-something years in RAR format, and all archives have passwords. I have a list of them, them all being similar (mostly something like John-03, John-04, John-05 ... e.g. name-month ...) but I need to manipulate the files at large, and it is a real problem removing and or dearchiving all those files, while entering passwords manually. What would be my best options concerning ? Ideally, I'm looking for some kind of archiver which tries out a predefined list of passwords, and asks only if non of them cracks the safe. Afaik, WinRAR has no such feature.

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• Eclipse: would more CPU cores with HyperThreading help increase speed?

  - by Dylan

  I'm programming a very large project in Eclipse. Right now I use a dual core machine with 2GB RAM, but Eclipse is sometimes busy for minutes (refreshing/indexing/building), so I'm upgrading to a new machine (with 16GB RAM and an SSD). Now I must choose between an Intel 2500K or an Intel 2600K that has HyperThreading. The price difference is about $100. Would that be worth it, for Eclipse, or is more memory/faster drive much more important for Eclipse ? Can Eclipse make use of the HyperThreading at all?

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• Remote Desktop Services In A Virtual VMWare Environment

  - by Christopher W. Szabo

  I have a quick question regarding Microsoft Remote Desktop Services in a virtualized environment using VMWare. This environment will actually be hosted in a large data center with in a cloud that is offered. This particular data center has the ability to establish high speed point to point connections with customers via metro-ethernet who are hosted in the cloud. The result is that customers can actually host their corporate domain in the data center's cloud. Put the merits of such a configuration aside for the time being. Believe me when I say that the cloud is stable and had enough hardware behind it to rival a dedicated cabinet. My question has to do with RDS in a virtual environment, which would amount to virtual desktops hosted on a virtual server. I've read that this works without issue using Hyper-V and VMWare. But before I take the plunge I wanted to get some feedback from the community.

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• What requirements does an IT department work space need?

  - by Rob

  Hello all, i need to provide a list of workspace requirements to the IT director for my network operations team. So far I got Secure workspace - so nothing gets stolen and people cant come up to us asking for support (they need a ticket from the helpdesk) Quite area - so that we can work and not be disturbed by the loud project managers who play soccer in the office sometimes. A large table or desk where we can setup and or config systems and servers if needed. What else do we need? Thanks in advance.

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• Swapping 3Ware Raid Card - Best Procedure

  - by Brian Lee Jackson

  We have a server running an old firmware version and driver (just took this position) on the 3Ware 9650SE Raid Controller... We have been having issues with the server and seemed to have narrowed it down to the Raid Card... I will be replacing the Raid card with the same model of 3Ware 9650SE, however, the card ordered most likely will have newer firmware on it. I managed to backup all the data to a very large drive. My plan is to update the firmware/driver on the current setup (which is still booting) and verify that everything works.. Then throw in the new Raid Card, check the firmware version (not letting it post). And update to newest firmware if needed via Java management utility on the card? Is this the best route? Thanks!

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• SPF include: too many IP addresses

  - by sprezzatura

  I've hit a snag with SPF. The SPF record for my domain will contain four or five entries, plus it will contain: include:sgizmo.com The SPF record for sgizmo.com contains eleven entries! This, plus mine, is way over the maximum ten allowed by the RFC (and probably by most servers). I realize that there has to be a limit in order to prevent DoS attacks. However, in the real world, it is probably not unreasonable for large companies to have many server addresses. Furthermore, must I know monitor my 'include:' counterparts for changes and additions? Must I check weekly, daily, to insure that some combination of changes doesn't suddenly put me over the top? It doesn't seem to me that SPF is suitable for prime time. Is there another way to do this?

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• SQL server peformance, virtual memory usage

  - by user45641

  Hello, I have a very large DB used mostly for analytics. The performance overall is very sluggish. I just noticed that when running the query below, the amount of virtual memory used greatly exceeds the amount of physical memory available. Currently, physical memory is 10GB (10238 MB) whereas the virtual memory returns significantly more - 8388607 MB. That seems really wrong, but I'm at a bit of a loss on how to proceed. USE [master]; GO select cpu_count , hyperthread_ratio , physical_memory_in_bytes / 1048576 as 'mem_MB' , virtual_memory_in_bytes / 1048576 as 'virtual_mem_MB' , max_workers_count , os_error_mode , os_priority_class from sys.dm_os_sys_info

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• Is a larger hard drive with the same cache, rpm, and bus type faster?

  - by Joel Coehoorn

  I recently heard that, all else being equal, larger hard are faster than smaller. It has to do with more bits passing under the read head as the drive spins - since a large drive packs the bits more tightly, the same amount of spin/time presents more data to the read head. I had not heard this before, and was inclined to believe the the read heads expected bits at a specific rate and would instead stagger data, so that the two drives would be the same speed. I now find myself looking at purchasing one of two computer models for the school where I work. One model has an 80GB drive, the other a 400GB (for ~$13 more). The size of the drive is immaterial, since users will keep their files on a file server where they can be backed up. But if the 400GB drive will really deliver a performance boost to the hard drive, the extra money is probably worth it. Thoughts?

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• Using the link command to keep backups on another drive

  - by Xavier

  I have a folder that contains a not so large amount of space called /data/backup. I have been told that if I link that folder (/data/backup) to an even bigger folder area like /bigdata/backup for example, that I will be able to execute backups to the /data/backup folder. It will then just create a link, but the data will be seen in both folders and the latter one (/bigdata/backup) will contain the backup results but it will show on both folders. Since the /bigdata/backup has far more disk space then the backup will no longer fail because of space problems in the /data/backup one. Is this true?

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• Cropping a PDF File's Margin During Printing

  - by JavaMan

  I'm using the free Acrobat Reader to print out some pdf documents having very large top/bottom/left/right margins. I want to remove the margins (which are wasting too much space and making the fonts too small). I used to use Acrobat (the paid version having edit features) to crop the src pdf file manually. But since it is an old version it does not support new pdf format and I don't want to upgrade for such a simple use. Is there any free way to crop/remove unwanted white margins from the printed pdf? I am thinking to print the pdf files to a PDF Printer like the Bullzip PDF Printer and enlarge the output file manually so as to remove any white margin. But there does not seem to be such a feature in Bullzip PDF Printer. Is there any other virtual printer software that can be used for this purpose?

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• Finding Image resolution in PDF file?

  - by Dave

  I have a problem of having some users creating very large PDFs. On the other hands I have PDF sent from our fax machines that are really small in size and totally printable. My question is Is there any way I can find the resolution (DPI) of the PDF. I search the internet, could not find any answer. Checked the properties of the file, this information was not stored there, at least in my case. What is the optimum resolution of converting text file into image PDF. 96dpi, 300dpi or more ? Fun question. Can I resize a PDF which was scanned with high dpi into smaller dpi? I know some answers might not be available as I have already searched the internet and could not find answers. Note: My PDF are entirely images, text to images. I am also familiar with primoPDF (free) something you can experiment with

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• How to display certain lines from a text file in Linux?

  - by Boaz

  Hi, I guess everyone knows the useful Linux cmd line utilities head and tail. Head allows you to print the first X lines of a file, tail does the same but prints the end of the file. What is a good command to print the middle of a file? something like middle --start 10000000 --count 20 (print the 10,000,000th till th 10,000,010th lines). I'm looking for something that will deal with large files efficiently. I tried tail -n 10000000 | head 10 and it's horrifically slow. Thanks, Boaz

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