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• Need an idiot-proof picture resizing program for Windblows.

  - by marcusw

  My friend needs to resize some pictures as part of a web publishing job, but he is rather clueless when it comes to computers. I am in charge of teaching him how to do this, but only have Linux (albeit with Wine installed) at my disposal for testing. Could you guys recommend a fast, easy, batch-capable, and hopefully open-source program that will resize pictures to the resolution he wants? It doesn't have to be anything fancy, but it needs to be quick and easy to use. Thanks!

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• Lightweight tool for viewing raw HTTP messages?

  - by rewbs

  Hi, I'm investigating differences in behaviour between a couple of Web servers. I need to see raw response data from the servers (i.e. before the response is de-chunked if it has "Transfer-Encoding:chunked" and before it is decompressed if it has "Content-Encoding:gzip"). I can find plenty of simple HTTP client that nearly do what I need (e.g. Poster, RESTClient), but they tend to decode the response one step too far. Network analysers like Wireshark give me what I need but are a bit heavyweight. Telnet is my best bet so far, but is a bit too simplistic (actions like capturing data or entering requests are a bit laborious). Can anyone recommend a good, lightweight tool for sending / viewing the raw data that constitute HTTP messages? Edit: I should add that I'm on Windows. Also, the tool would need to work both with remote and local servers.

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• How do laptop battery voltages affect runtime?

  - by Bigbio2002

  I ordered a new battery for my faithful XPS M1710. I'm not sure of the voltage of the battery I have now, but the new one that the Dell rep got me (after 3-4 times confirming my phone number and laptop model number) is 14.8v. I was a bit concerned about potential incompatibilities (as most of the other compatible batteries listed were 11.1v), but I figure that there's no way that Dell would "recommend" batteries that wouldn't work or fry your system. Now, my question is, how does voltage affect battery life? If we assume the needed power draw to be constant, a higher voltage would indicate less amperage needed, therefore the battery would last longer before running out, yes? Or am I missing something? For reference: P=I*V P = power I = current V = voltage (duh)

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• How to make a quiet laptop?

  - by psihodelia

  Most modern laptops have very noisy fans. I am looking for a quiet laptop or a small stationary computer which has all its hardware built in a display. Most tasks will be PDF/docs processing, real-time audio processing, web-surfing and Skype video chats. Certainly, there is no any fan-less model today; but maybe some of the existed laptops do not switch on their fans so often or implement different solutions? For example, an iPad has no fan at all and it is fast enough for my needs, but it has no normal operating system, so I can't use it for anything but audio chats and web-surfing. Or maybe I can buy a laptop and tweak it to make it absolutely noiseless? Can you recommend any solution please?

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• Windows Proxy Server advice

  - by Scott

  I have a webserver that currently has about 10 IP addresses. I have various clients that require a proxy server to route their internal traffic through. The load is not that great, so I'd like to have this ONE server act as a proxy server for 10 different clients, each client having their own unique IP on the server. The hardware is already setup, but I'm wondering what software solutions you guys recommend? I've looked at WinGate, Squid-Proxy, etc...but am pretty green with this. Maybe there's even a way to have Windows do this natively? I'm running Windows Server 2008, 32 bit.

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• Encrypt temporary password using public ssh key

  - by David M. Syzdek

  I manage a virtual office and our staff uses both SSH keys and passwords for authentication. If one of our staff forgets his password, is there a way to encrypt a temporary password using his public RSA ssh key so I can send it to him via e-mail? I've seen other questions related to this one, however the "answers" generally recommend against using the public/private SSH keys to perform general encryption/decryption and do not actually state if this is possible. I would like to know if it is indeed possible and what are the steps to encrypt and then decrypt the password.

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• Looking for a router with multiple WAN ports and load balancing

  - by Cyrcle

  I'm going to be moving in a few months. The location I'm moving to is great except it's on a road with very few people, so the internet access option is limited to DSL at 1.6Mbps down, 384kbps up. This is much slower than I'm used to. One option is to get at least two of the DSL lines. There's also good possibility that I'll be able to get WiMax or similar. I've been looking around a bit and it seems like what I need is a load balancing router with multiple WAN ports. Can anyone recommend some good ones? I could also go with a small power efficient Linux box with multiple NICs. What would be good software for that? It'd need to be able to handle around 10Mbps. Thanks for any help

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• smartOS HPC config suggestion

  - by Andrew B.

  I'm configuring a brand new HPC server and am interested in using SmartOS because of it's virtualization control and zfs features. Does this configuration make sense for a SmartOS HPC, or would you recommend an alternative? System Specs: 2x 8-core xeon 384 GB RAM 30 TB HDs with 2x512GB SSDs Uses: - zfs for serving data to different vms, and over the network; 1 SSD for L2ARC and 1 for ZIL - typically 1-2 ubuntu instances running R and custom C/C++ code My biggest concerns as a newbie to SmartOS and ZFS are: (1) will I get near-metal performance from ubuntu running on SmartOS if it is the only active vm? (2) how do I serve data from the global zfs pool to the containers and other network devices?

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• Bitlocker folder encryption

  - by Razor

  My situation I know that bitlocker is meant to encrypt whole drives, but I have an hard drive that is already fully partitioned and containing data. I'd like to encrypt part of one partition, leaving the rest of the partition accessible. I would very much like to avoid programs like Norton partition magic (which resize/split partitions), because every time I used them I had problems with the data stored. Question Is there any way/builtin alternative/3rd party app that integrates with windows login to encrypt one subset of a partition? EDIT I heard horror stories about EFS, which is why I don't want to use it. Some highlights from that article: In fact I’ve only used EFS twice in the last ten years on my own computers and on both occasions I’ve lost files and documents. I therefore cannot recommend you ever encrypt your files with this Windows feature. Unfortunately, because of incompatibilities with some differing versions of EFS files can end up scrambled and unrecoverable.

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• Windows RRAS multi-network routing

  - by Brent Pabst

  I am looking for advice, comments and suggestions from anyone who has used Windows RRAS (2008 R2 Pref.) as the primary routers for our multiple offices. We have multiple physical office locations and are looking into utilizing Windows Server 2008 R2 Core as redundant Active/Active routers/gateways for our network as opposed to a physical router from Cisco or Juniper, it costs a lot less! Any problems, issues or documentation anyone would recommend? We will still most likely have a firewall on the edge but the majority of our traffic will be inter-office with some external services. We will be using multiple Class B networks across our two offices.

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• Windows folder encryption

  - by Razor

  My situation I know that bitlocker is meant to encrypt whole drives, but I have an hard drive that is already fully partitioned and containing data. I'd like to encrypt part of one partition, leaving the rest of the partition accessible. I would very much like to avoid programs like Norton partition magic (which resize/split partitions), because every time I used them I had problems with the data stored. Question Is there any way/builtin alternative/3rd party app that integrates with windows login to encrypt one subset of a partition? EDIT I heard horror stories about EFS, which is why I don't want to use it, unless there have been improvements on reliability with windows 8. Some highlights from that article: In fact I’ve only used EFS twice in the last ten years on my own computers and on both occasions I’ve lost files and documents. I therefore cannot recommend you ever encrypt your files with this Windows feature. Unfortunately, because of incompatibilities with some differing versions of EFS files can end up scrambled and unrecoverable.

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• Monitor ESXi hosts with Nagios

  - by Kyle Brandt

  Does anyone recommend any methods for monitoring ESXi 4.1 hosts with Nagios? I have looked into SNMP but it seems to be in a pretty sorry state. Net-SNMP does not seem to be included and there is a built it SNMP daemon that I set up. However from the standard MIBs there only seems to really be network interface counters and the VMWare MIBs seem quite useless. Right now I am considering SNMP for the interface speed and trying the plugins listed at http://unimpressed.org/post/96949609/monitoring-esxi-performance-through-nagios . Anyone have a better idea? I would like to monitor the hosts directly, not through something like vCenter.

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• Can you share wisdom on using HISTIGNORE in bash?

  - by sage

  I was reading the manpages for bash on the plane and I stumbled across the HISTIGNORE variable. To test it out, I immediately edited my .profile to define this variable: export HISTIGNORE=ls I tested it out and this is great! It excludes plain 'ls' commands from my history without excluding more interesting commands with lengthy paths, but having recently harvested a great deal of wisdom from SU I am eager to know what other commands superusers might recommend or other lessons learned. What can you share about using the HISTIGNORE variable in bash? (Note: I'm about to board my next flight and I have obligations upon arrival, so I will be absent for a number of hours before I can respond to comments...)

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• How can I reroute a sub-domain to localhost + port number?

  - by urig

  I have several web applications running on my developer machine. They mimic our production web applications which are hosted on sub-domain. For example, consider: api.myserver.com - is mimicked by 127.0.0.1:8000 www.myserver.com - is mimicked by 127.0.0.1:8008 and so on... How can I make it so that, on my Windows 7 machine, HTTP calls to "api.myserver.com" (note the lack of port number) are redirected to 127.0.0.1:8000 etc? Note that this needs to apply both to client-side calls (in the browser) and server-side calls (from IIS to Python development server and vice versa). Do I need a proxy to run locally to achieve this? Can you recommend such a tool?

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• Does aria2 support write small files in batch?

  - by Jon

  I'm using aria2 to download 8 million jpg from flickr. Each image is about 100KB. I got a list of urls of these images in a txt file, the format is: http://farm2.staticflickr.com/1070/1151334893_5a8e7f77f4.jpg I'm wondering whether aria2 support writing small files in batch? Say write 100 image to disk when all of them are download in the memory, not just write every single file when the download is finished. Because I think writing in batch will better protect my hard disk. Or do you have other software or opensource code to recommend?

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• What virtualization solution should I try next, after hitting problems w/ VMWare Player in dual-netw

  - by Alex R

  I have been using VMWare Player 2.5 for a while (Ubuntu guest on Vista host, 32-bit). VMWare had worked great until now but then I hit a brick wall: Due to some reorganization of my home network, the host machine now has to use a wireless connection to reach the Internet, while the printer, fileserver, and other important stuff are attached to a local gigabit hub. I have tried several tricks, such as editing the .vmx file, changing settings in vmnetcfg, etc, but I'm still unable to get the virtual Ubuntu box to connect each of the two virtual NICs to different networks (I did get it to recognize two NICs, but both DHCP'd onto the gigabit LAN). So, I'm ready to dump vmware for something with a little more low-level control of network settings. Virtualization is such a crowded space, I could spend months evaluating every product out there. I'm hoping for a shortcut... Can anyone recommend the best VM for my situation described above? Thanks

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• Downloads speed starts ok but after a few seconds they go down to 10kbps?

  - by peterg

  Since yesterday any file I try to download from any host start downloading ok (at 1mbps) but after a few seconds the speed start to decrease down to 10kbps. I use a mobile modem (huawei) and I connect to a wcdma network. What could be happening? I use kaspersky, and I checked the Network Monitor and I don't see any weird process using bandwidth. What other tests can I run? Recommend me some app to monitor the traffic to see if I have some malware or see where my bandwidth goes.

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• Cisco training basic, entry, ASA/PIX. Help to understand network

  - by Inbr3d

  I need to learn how to configure Cisco ASA/PIX boxes within my network. I have the task to impliment a new ASA 5505 into a new site we purchased. I have over 9 devices linking my sites together and with no support from the previous IT company im finding it hard to get to terms with what they can do and what they are currently doing. I know there are hundreds of guides how to configure them but into an existing environment? can anyone recommend courses within the UK that can help me? Im not much of a book reader, i would need to be able to manage my network after. also, should i seek external contracts to support these devices? as they are critical for our work. thanks

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• What motherboard for a Core i7 920 Processor?

  - by jasondavis

  I am wanting to build a really nice PC, price is not to important as I will buy pieces every week or whatever it takes until I get everything I need. I am not a gamer but I would like to watch video and have 3-4 monitors. I do a lot of programming and use a lot of big programs so I would like to go all out and get a lot of Memory, probably at least 12gb but possibly more even as I see many boards support up to 24gb now. Will be using Windows 7. I have decided to go with the Core i7 920 Processor BX80601920. Based on what I posted above, can you please recommend some good motherboards I should look at ? Also some good places to purchase them online. Thanks for any help, tips, etc.

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• Badwidth-Hogging Linux Server Causing Trouble

  - by BlairHippo

  We have a Linux server (2.6.28-11-generic #42-Ubuntu) that's misbehaving on a client site, gobbling up an entirely unacceptable percentage of the client's bandwidth, and we're trying to figure out what the heck it's doing. And the guy who had the sysadmin skillset has yet to be replaced. We're at a loss for what could be causing all that network traffic, and need to figure it out SOON. What log files should I be looking at to find this information? What analysis tools would you recommend for this task? Please note that I'm not looking for a tool that will allow me to analyze FUTURE traffic. The client is on the verge of shutting the machine off entirely; I need to figure out what it's been doing with the data I already have, if that's at all possible. My thanks in advance for helping a development monkey play sysadmin.

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• How to install ported Linux software on a Mac? (MacPorts, Fink, anything better?)

  - by Ben Alpert

  On my Mac OS X machine, how would you recommend I install various software that's been ported from Linux? I don't install such software very frequently, but I've been using MacPorts and it always seems quite slow, presumably because it has to compile the packages on-the-fly. I'd much prefer a package management system that has binary packages, saving me the need to compile things every time I want to download something new. I think Fink has binaries for some of the packages, but I usually see MacPorts recommended as the system to use. Which do you think works better and why? (Or is there another system that I haven't heard of?)

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• How do you explain ethernet cable problems to non networking people?

  - by Bryan McLemore

  We've recently been doing a large network migration in our datacenter. We've had a few cables in this start to deliver really bad pings (in excess of 500ms on a LAN) before they could be replaced. The cables we were replacing weren't made the best. They where all hand made and the runs were so short on some of them that the bend radius was definitely too tight. Some of them ran in bundles right in front of the heat exhaust of the power supplies. The cables were running ok until we started pulling the ones surrounding them out. Then a few started having the problem I mentioned above degrading performance and causing reliability issues. I'm trying to figure out the best way to explain this to non networking people. Is there any documentation that people could recommend or other methods?

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• ideal memory configuration 4 bank, ddr3, AM3+ FX - 1 vs 2 vs 4 dimms?

  - by TardisGuy

  Ok, so ive been looking around, trying to learn and understand the way that ram works. Ive gotten one answer that said "The addressing is best for 2 sticks, and when you use 4; it slows down" Another answer said something like: Theres bank/channel interleave that makes the memory read like one stick Also I read something about the memory density also being a factor. I dug further and found out that theres a higher speed limit on my board for 2 sticks vs 4, so now im trying to put an image in my head of how and why, and... pfft. Can anyone explain, or recommend a resource that would answer these questions?

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• Any good phone system on a Windows Environment ?

  - by Kedare

  Hello, I am looking for a phone system that integrate well with a (almost) 100% Microsoft. I would like something that can integrate with Exchange and Active Directory (in-phone searching/calling by name (is this possible using SIP ?), etc) and if possible something not too expensive (Bye bye Cisco !), what do you recommend me ? I've heard of 3CX as IPBX and Aastra as Phones, are they good for this ? Or do you know something else good at this ? I've also seen some Alcatel IP Phones doing this (search by name, but I think that was a separated address book and not loaded from AD/Exchange) Thank you !

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• Standalone server setup for compute capacity

  - by mikera

  I'm developing an application for my company that will require a lot of compute capacity (running some very big mathematical calculations), and looking for some form of server setup to do this. For various reasons, we want to run this on-site in our office rather than hosting it externally. It's been a while since I last had to set up my own servers so I thought I would tap into the collective wisdom of serverfault! My broad requirements are: Budget $30-50k, with an aim to get as much compute capacity as possible for that budget 64-bit servers suitable to run Ubuntu Linux + Java Some relatively standalone rack that can be installed in secure office space Fast/low latency network connections between the servers, but don't really care about connectivity to the outside world Storage capacity shared between the servers - they don't necessarily need their own storage providing they can be booted from a common image Downtime can be tolerated (since the calculations are run in batch mode) The software itself is fault-tolerant, so there is no need for extra resiliency in the server setup (cheap replaceable commodity parts will be fine in general) Given these requirements what kind of setup would you recommend and why?

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