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• Best shortcut in Total Commander

  - by life-warrior

  So, what's your favourite TC shortcut or shortcut combination ? Which one do you use and for what purpose ? Among my most often used: Ctrl-Left ( or Ctrl-Right ) - open archive or folder under cursor in opposite tab. Ctrl-Shift-Enter, Alt-F8, Ctrl-X - copy full file path to clipboard. Shift-F6, Shift-End(if needed), Ctrl-C - copy only file name w/o path. Select files, Ctrl-M - multi-rename, for example remove "DVDrip" from file names. Ctrl-\ - go to root directory. Ctrl-D, - go to directory with highlighted letter specified. For example, name a downloads directory "&Downloads" in favourites, and the letter after ampersand will be highlighted. Alt-F7, feed to listbox, Ctrl-A, Mark(menu)-Save selection to file - creates a file with all files and directories inside current, with full path. Ctrl-[3-6] - sort files by name(3), extension(4), date(5), size(6). For example, Sort by name, when you need movies and soundracks with the same name and different extension to group them together. Sort by extension, when you need to find EXEs in Windows directory. Sort by Date, when you need to find the latest file downloaded in your dir. Sort by size, when you need to delete the largest files for free space.

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• How can I tell my dd-wrt router to use someone's Amazon Affiliates link when I point my browser to amazon.com?

  - by Michael Paul

  Here's what I'd like to do. Instead of a one-time donation to one of my favorite free tools (junecloud.com) I'd like to do what they suggest here and use their Amazon Affiliates link to do all my Amazon shopping. I shop at amazon once or twice a week, so this is a great way to let them earn lots of long-term cash without me dropping a dime. My thought was to go into my dd-wrt enabled router and tell it, "any time I go to amazon.com on any computer in the house, please go to http://www.amazon.com/gp/redirect.html?link_code=ur2&tag=junecloud-20&camp=1789&creative=9325&location=%2F instead. (That URL simply redirects me to amazon.com but every purchase I make during that session is credited to JuneCloud.) Once logged into dd-wrt, I went to Services Services DNSMasq but I'm not really sure how to get it to work from there, or if it's even possible. I know I can redirect IP addresses, but I'm looking to redirect someone on my network from amazon.com to the special amazon affiliate code link. Hope that's clear. Thanks for any replies!

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• Can I make TCP/IP session to run less than 60 seconds?

  - by par

  Our server is overloaded with TCP/IP sessions, we have 1200 - 1500 of them. Most of them are hanging in TIME_OUT state. It turns out that a connection in TIME_OUT state occupies a socket until 60 second time-out is elapsed. The problem is that the server gets unresponsive and many clients are not getting served. I have made a simple test: download an XML file from the server with Internet Explorer 8.0 The download finishes in a fraction of second. But then I see that the TCP/IP connection is hanging in TIME_OUT state for 60 seconds. Is there any way to get rid of TIME_OUT waiting or make it less to free the socket for new connections? I understand why TCP/IP connection enters TIME_OUT state, but I don't understand why Internet Explorer does not close the connection after the XML file download is over. The details. Our server runs web service written in Perl (mod-perl). The service provides weather data to clients. Client is a Flash appication (actually Flash ActiveX control embedded in Windows application). OS: Ubuntu Apache "Keep Alive" option is set to 0

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• Resuming downloads in Firefox

  - by Kim

  Unfortunately, Firefox still has failed to add the option to resume downloads. I've ran into this problem SO MANY times, and in my previous searches I found posts saying Firefox was going to fix that. As of 3.6.3 they haven't. I just tried Free Download Manager (FDM), again, having the Firefox addon Flashgot use it. The download gets passed to FDM, and fails, giving the error message "access denied, invalid username or password." No password was required. The site I'm trying to get the file from is turbobit.net, which limits downloads speeds to 100kb/sec, and has a 59 second countdown before you get the link. I guess it's transparently using a password on their end. If I just download normally (save to disk) the download starts fine, but it fails after 30 minutes to 1 hour (always different), and my Wi-fi connection will stop briefly - and I have to start all over. So I will never be able to download a large file. I also tried DTA instead of FMD with Flashgot, and I get an "access denied" message in DTA. Again, I reloaded - waited the 59 seconds, and download w/Firefox, and the download starts fine. The failure message in the Firefox Downloads window is "source file at http... could not be read." Any help would be greatly appreciated. When is Firefox going to finally add the ability to resume downloads????? Is there some other software I haven't found using Google that will work?

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• High load average due to high system cpu load (%sys)

  - by Nick

  We have server with high traffic website. Recently we moved from 2 x 4 core server (8 cores in /proc/cpuinfo), 32 GB RAM, running CentOS 5.x, to 2 x 4 core server (16 cores in /proc/cpuinfo), 32 GB RAM, running CentOS 6.3 Server running nginx as a proxy, mysql server and sphinx-search. Traffic is high, but mysql and sphinx-search databases are relatively small, and usually everything works blazing fast. Today server experienced load average of 100++. Looking at top and sar, we noticed that (%sys) is very high - 50 to 70%. Disk utilization was less 1%. We tried to reboot, but problem existed after the reboot. At any moment server had at least 3-4 GB free RAM. Only message shown by dmesg was "possible SYN flooding on port 80. Sending cookies.". Here is snippet of sar 11:00:01 CPU %user %nice %system %iowait %steal %idle 11:10:01 all 21.60 0.00 66.38 0.03 0.00 11.99 We know that this is traffic issue, but we do not know how to proceed future and where to check for solution. Is there a way we can find where exactly those "66.38%" are used. Any suggestions would be appreciated.

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• Setting up self signed cert and CA [plesk / linux]

  - by microchasm

  I'm about ready to give up and do a clean wipe of this machine and start over with ISPConfig or some other variant. I installed Plesk on this machine to help with some of the handiwork. It is the free version (single domain); I don't need it for much. It's nice, though, to use to set up db's email, etc. Anyway, I would like to set it up as a CA (which I can add to users' trusted root servers to alleviate those warnings). It seems like Plesk does all it can to obfuscate where things are. Despite trying to find the conf files, and crt/pem/key etc. I am (5 hours later) now left with a machine that won't even get to the ssl page. The browser will sit there, until a 'connection reset' error comes up. In error_log, I get messages saying CN doesn't match server name -- which it does. ssl_error_log: [Thu May 13 16:02:14 2010] [warn] RSA server certificate is a CA certificate (BasicConstraints: CA == TRUE !?) [Thu May 13 16:12:19 2010] [warn] RSA server certificate is a CA certificate (BasicConstraints: CA == TRUE !?) not very helpful. If anyone has any experience, and/or recommendations (including other software), I'd be much obliged. NB RHEL5; 1 domain, 3 subdomains; everything local only. Thanks.

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• Dell XPS 15 L502X hard drive Partition

  - by Mohan Gajula

  I have a situation here. I got my new Dell XPS 15 Laptop. The configuration of hard drive is as below : Volume 1: (OEM Partition): 133MB Volume 2: OS (C:): 685.25 GB Volume 3: Recovery : 13.25 GB Now, I am trying to re-partition my C Drive to have a C: drive with 100 GB and a new drive with 585 GB. Earlier, I tried using the Windows 7 Disk Management to shrink and extend the volume. That lead to the OS and hard drive not working. Dell Tech support tried to fix the issue, but they were not able to fix the issue online. Later a Dell Technician arrived my place, and replaced the hard drive with a new hard drive. Please help me re-partition the C: Drive with 100 GB, and new D drive with 585 GB. I don't want to lose my Recovery Partition. SOLUTION As Suggested by KCotreau below , I have done exactly. I have resized the C drive to 100 GB. And then applied the changes. Windows got restarted. On the boot screen, the partition was taking place. It took around 30 mins ( approx. ). Once after restart, I can see my C drive is 100 GB. Now opened the Easeus again. And created a new partition for the free space ( 585 GB ) this took 10 seconds to create. Here goes the screenshot after partitioning. Thanks to KCotreau. You are amazing.

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• Windows 7 fails to connect to the internet a few minutes after startup

  - by SageTheGreat

  Problem Earlier today, when I turned on my desktop computer, my internet connection works fine. Cryptocurrency miners connecting and hashing as usual and I can browse websites. But after a few minutes, my miner fails indicating that there is something wrong with my internet connection. Tried refreshing my browser and is stuck at "resolving host", and then presented me an error. After that, i can't browse sites anymore. But the weird thing is that the network icon in Windows 7 shows no signs of problems. Solutions Made Restarted my computer without doing anything: Problem persists. Tried using the network troubleshooter of windows: Reported no problems Stopped bonjour still no progress. Loaded windows using Last good config: still no progress. Restarted Modem: No change. Current Status I currently did a system restore to my system to a point before installing the latest update from Microsoft. Because earlier today, I installed some updates and after that, the problem started to appear. (After system restore, same problem.) Latest Programs installed before the problem MS Visual Studio 2013 (but internet still worked fine after the install). I hope someone could provide answers on this problem. It is my first time encountering this. EDIT: Additional Info OS: Windows 7 SP1 64-bit AV: Avast Free Antivirus Internet Connection Type: Ethernet It appears that my Laptop can't even connect to the machine thru Remote Desktop My laptop and phone on WiFi works fine and can connect to the internet. EDIT 2: Whenever I boot into Safe Mode, my Internet is fine.

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• How to unblacklist an IP at Google?

  - by DJRayon

  I own a small business with two servers for webhosting. When setting up the primary (CentOS 5.5 + WHM, secondary is WHM DNS Only) server I kinda messed up the firewall, so the hackers could send stuff from my server. My primary IP is x.y.29.218. Anyway - I got blacklisted in several places, but now those blacklistings are gone. For a week or so, but Google still has my IP blacklisted. I handling serious damages because of that. Many clients want to switch from my hosting, etc. I've fixed the hole with CSF firewall SMTP_BLOCK option and enabled also the WHM SMTP TEAK Currently all I see from the Main Email View Mail Statistics (Errors section) in WHM is rows and rows of the following message removed-the-email-address-for-security R=lookuphost T=remote_smtp: SMTP error from remote mail server after end of data: host aspmx.l.google.com [a.b.39.27]: 550-5.7.1 [x.y.29.218 1] Our system has detected an unusual rate of\n550-5.7.1 unsolicited mail originating from your IP address. To protect our\n550-5.7.1 users from spam, mail sent from your IP address has been blocked.\n550-5.7.1 Please visit http://www.google.com/mail/help/bulk_mail.html to review\n550 5.7.1 our Bulk Email Senders Guidelines. h24si3868764fas.171 What are my options? I have one IP free. How can I configure Exim to send mail from that IP? My brain is like constantly blowing up because of this problem. Please someone, who has any knowledge how to deal with the current situation, please give me some kind of help - any help, suggestions, etc. I've tried everything I know, and I still don't know much, because this is the first time (I just started to webhost, etc) I deal with real physical servers not some kind of pre-setup VPS solution. Many - many thanks, whoever has time to offer some help.

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• File Replication Service Errors

  - by ekamtaj

  Hey Guys, We have a windows 2003 r2 server and couple of the users are reporting that they can not scan files into the windwos server. They are getting an Out of Space errors. I took a look at the server and we have 600GB free disk space on that partition. But while looking at the event log I found a lot of errors like (13552,13555) The File Replication Service is unable to add this computer to the following replica set: "DOMAIN SYSTEM VOLUME (SYSVOL SHARE)" This could be caused by a number of problems such as: -- an invalid root path, -- a missing directory, -- a missing disk volume, -- a file system on the volume that does not support NTFS 5.0 The information below may help to resolve the problem: Computer DNS name is "server.domain.local" Replica set member name is "server" Replica set root path is "c:\windows\sysvol\domain" Replica staging directory path is "c:\windows\sysvol\staging\domain" Replica working directory path is "c:\windows\ntfrs\jet" Windows error status code is FRS error status code is FrsErrorMismatchedJournalId Other event log messages may also help determine the problem. Correct the problem and the service will attempt to restart replication automatically at a later time. For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.

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• DXVA and ATI.... what am I missing?

  - by Shiki

  ATI Radeon HD3650 ffdshow (the one comes with CCCP 2010-10 AND the latest from Free-codecs site) Catalyst 10.12 Latest DirectX, Windows 7 HP x64 If I try to play it simply, the player (mpc-hc) won't use the acceleration. If I disable checks, I get artifacts. Back then it worked perfectly with my Intel and ATI too (Lenovo ThinkPad T500, switchable graphics). This only appeared recently. What should I do? What am I missing? If possible, I don't really want to downgrade drivers (waaa ATI drivers s.ck ... sorry but.. honestly), because the older one got a buggy DP driver so my external display gets a totally wrong resolution. Info about the media file: Video: Format : AVC Format/Info : Advanced Video Codec Format profile : [email protected] Codec ID : V_MPEG4/ISO/AVC Writing library : x264 core 88 r1462 7fcffde Encoding settings : cabac=1 / ref=8 / deblock=1:0:0 / analyse=0x3:0x133 / me=umh / subme=8 / psy=1 / psy_rd=0.80:0.20 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-3 / threads=3 / sliced_threads=0 / nr=0 / decimate=1 / mbaff=0 / constrained_intra=0 / bframes=8 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / wpredb=1 / wpredp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=crf / mbtree=1 / crf=16.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00 The sample file I'm testing at the moment: [Coalgirls]_Kiddy_Girl-and_01_(1920x1080_Blu-Ray_FLAC)_[91428679].mkv (I tried many x264 files, no use.) Artifacts

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• Disk wipe preferences

  - by hmvm123

  I manage a pool of systems that are loaded with software and sent to potential customers for evaluations which often land sensitive information on the drives. Before shipping them back, they typically like a standard wipe to be run to clean out the drives. Most are familiar with DBAN so I try to make sure it can work on my systems. Unfortunately, this means I'm usually in RAID driver hell trying to make sure that the versions out there support the ones my systems are shipping with. These are various kinds of 3ware and LSI ones. Consequently, I have DBAN 1.0.7 working on some, a beta version of 2.0 on the others and 2.2.6 on some of the latest SSD based ones. Now with the LSI controllers on my IBM x3550 M3s (1064/1068) I'm getting no love at all. Is there a way out? Do you buildroot with DBAN and try to piece the drivers together? Any other tools, free or commerical, that stay updated. I'm trying to walk people of varying technical proficiencies through this, so a boot disk with simple choices is preferable.

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• Backing up default windows installation with dd from linux running on another partition - is this fe

  - by Marek

  I am preparing to reinstall my system. I am thinking about creating a multi boot with a linux distro+Windows 7 to choose from when starting up. I would love to be able to skip all the hassle of reinstalling Windows and all programs when it starts becoming too slow in the future, thus I would like to mirror my fresh Windows system partition with some programs preinstalled. I am thinking about installing Ubuntu, making a partition for windows, installing windows with the basic environment (Visual Studio, Office, etc.) then booting into Linux and making an image of the windows partition with dd. I am not familiar with linux at all so I am a little afraid something may go wrong along the way. Is it possible to do it this way? Will I be able to partition my existing disk for multi boot easily after I install Ubuntu? Will I be able to recover the Windows partition easily using dd when I will need to re-create a fresh windows partition in the future? What other (better) approach can you recommend to achieve the goal of easy disk mirroring (for free)?

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• Notebook Operating System with extreme support cycles/security updates

  - by leto

  Hello there, after reading the announcements about Mac OS X "Lion" and Apples political decision, I've had enough. I'm a longtime Apple User since 1992, have always felt at home there, but am trying to switch to alternative Operating System since a year. I've also been working with Unix machines since 2001, so I'm looking in one of the free Unices or a Linux. Since I last looked at the desktop in 2002 choke much has changed, it seems. So I'm lost once more in the war between desktop environments and software. To be honest: I don't care what it's name is, I want to get my job done. Here's what I set me as landmark for an operating system/software to be considered: Has to be atleast four years old Has to supply security updates for current release for atleast a year Production quality stability for the whole desktop environment (!) No f****g commercial stuff that tends to supply me with privacy invading App Store or Cloud space So far I'm running a MacBook from 2007, 4 Gig memory, 250 Gig disk and I need: IMAPs for Mail since 1995 Webbrowser sic Shell Keeping current with Updates/Upgrades with no more than 5 Minutes spent in entering commands (makes it hard for OpenBSD ;-) ) A desktop filemanger would be nice, but is a bonus. What can you suggest as operating system? The one with the longest support cycles and best chance to survive the next 10 years will win a new user, even sending patches when needed :-) Greets

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• Website has become slower on a VPS, was much fast on a shared host. What's wrong?

  - by Arpit Tambi

  My shared host suspended my website stating system overload, so I moved my website to a VPS which has 4GB RAM. But for some reason the website has become very slow. This is the vmstat output - procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------ r b swpd free buff cache si so bi bo in cs us sy id wa st 1 0 0 3050500 0 0 0 0 0 1 0 0 0 0 100 0 0 Here's the Apache Benchmark output for a STATIC html page I ran on the server itself - Benchmarking www.ask-oracle.com (be patient)...apr_poll: The timeout specified has expired (70007) Total of 20 requests completed Update: Server Config: List item Centos 5.6 4 cores cpu 4 GB RAM LAMP stack with APC Wordpress Only one website It takes almost double time to load now, same website was much fast on shared hosting. I know I need to tweak some settings but have no clue where to start from? I have already tried to optimize apache, mysql etc. Update 2: CPU usage is low, see uptime output: 11:09:02 up 7 days, 21:26, 1 user, load average: 0.09, 0.11, 0.09 Update 3: When I load any webpage, browser shows "Waiting" for a long time and then page loads quickly. So I suspect server can accept only limited connections and holds extra connections in a waiting state. How to check this? Update 4: Following is the output on executing netperf TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to localhost.localdomain (127.0.0.1) port 0 AF_INET Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 16384 10.00 9615.40 [root@ip-118-139-177-244 j3ngn5ri6r01t3]# Here are the Apache MPM settings from httpd.conf, do they look okay? <IfModule worker.c> StartServers 5 MaxClients 100 MinSpareThreads 50 MaxSpareThreads 250 ThreadsPerChild 125 MaxRequestsPerChild 10000 ServerLimit 100 </IfModule>

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• APC fragmentation on EC2 Micro for Wordpress + W3TC

  - by Maarten Provo

  I'm trying to optimize APC for my Amazon EC2 Micro server running one Wordpress-site with W3TC. I've started with the settings advised by TechZilla in another topic but I keep getting high fragmentation with 50% of space being free. I've uploaded an image to http://www.maartenprovo.be/downloads/apc.jpg but I can't post it here since I need at least 10 reputation. What values can I optimize to prevent fragmentation? [apc] apc.enabled=1 apc.shm_segments=1 ;32M per WordPress install apc.shm_size=164M ;Leave at 2M or lower. WordPress does't have any file sizes close to 2M apc.max_file_size=2M ;Relative to the number of cached files apc.num_files_hint=1000 ;Relative to the size of WordPress apc.user_entries_hint=4096 ;The number of seconds a cache entry is allowed to idle in a slot before APC dumps the cache apc.ttl=7200 apc.user_ttl=7200 apc.gc_ttl=3600 ;Auto update chache files on change in WP-ADMIN or W3TC apc.stat=1 ;This MUST be 0, WP can have errors otherwise! apc.include_once_override=0 ;Only set to 1 while debugging apc.enable_cli=0 ;Allow 2 seconds after a file is created before it is cached to prevent users from seeing half-written/weird pages apc.file_update_protection=2 ;Ignore files apc.filters apc.slam_defense = 0 apc.write_lock = 1 apc.cache_by_default=1 apc.use_request_time=1 apc.mmap_file_mask=/var/tmp/apc.XXXXXX apc.stat_ctime=0 apc.canonicalize=1 apc.write_lock=1 apc.report_autofilter=0 apc.rfc1867=0 apc.rfc1867_prefix =upload_ apc.rfc1867_name=APC_UPLOAD_PROGRESS apc.rfc1867_freq=0 apc.rfc1867_ttl=3600 apc.lazy_classes=0 apc.lazy_functions=0

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• Anyone know a good mind mapper that works with a scheduler?

  - by GLycan

  TL;DR: Mind mapping tasks to be processed into a schedule based on task metadata. I have all sorts of ideas about what to invest resources (mainly time) in, but when I actually have time to do something I useually end up browsing reddit for not knowing what do to, and the frequancy with which I forget deadlines scares me. I'd love to bring order and structure into my mind, and always know what to do next. So, I want a mind mapping app, where I'd give each branch (types and subtypes of things I want to do) a importance score (if there were two branches, and one had 60 while the other 40, they would respectivily get 60% and 40% of the parent's importance, with the root being 100) and a how soon that branch should be revised/updated (an hobby I want to try out might be checked, say, once a week, while a school subject should be checked once a day) and give each leaf (something I want/need to do) how much time it takes, deadline (if any), and optionally an absolute importance, reoccurrence (guitar practice might repeat once a week), and prerequisites (reading something requires that book (although that could be brought somewhere), coding requires a box, jogging requires being outside) and maybe some other flags, like if it's enjoyable or not. It should either be packaged or working with a schedular app, to which I'd say, look, my day works this way (completely busy from 8 to 9:15, then 15 minutes of being inside with nothing, ..., two hours with box and possibility to go outside, etc), saying that such-and-such pattern is school and happens ever weekday except such-and-such days. The output should be of the form of a schedule, fit for printing or, when I finally get an android, mobile viewing, that schedules tasks with regards to availability of resources and importance (importance being derived from the leaf-task's parent branches), and the set of flags (all work and no play makes me a dull boy). One of these tasks should be reviewing anything that should be updated on that day, including future day layouts (e.g, if the time slots of future days have changed. This should be done every day.) Does anyone know some collection of preferably open-source (or free, or pirateable) tools, or better yet a single one, that accomplishes this task? I know python pretty well, and should be able to write any necessary glue.

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• Allignment of ext3 partition on LVM RAID volume group

  - by John P

  I'm trying to add a partition on a LVM that resides on a RAID6 volume group and fdisk is complaining about the partition not residing on a physical sector boundry. My question is, how do you calculate the correct starting sector for a partition on a LVM? This partition will be formated ext3. Would it be better to just format the LVM directly instead of creating a new partition? Disk /dev/dedvol/backup: 2199.0 GB, 2199023255552 bytes 255 heads, 63 sectors/track, 267349 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 1048576 bytes / 8388608 bytes Disk identifier: 0x4e428f49 Device Boot Start End Blocks Id System /dev/dedvol/backup1 63 267349 2146982827+ 83 Linux Partition 1 does not start on physical sector boundary. lvdisplay /dev/dedvol/backup --- Logical volume --- LV Name /dev/dedvol/backup VG Name dedvol LV UUID OV2n5j-7LHb-exJL-t8dI-dU8A-2vxf-uIicCt LV Write Access read/write LV Status available # open 0 LV Size 2.00 TiB Current LE 524288 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 32768 Block device 253:1 vgdisplay dedvol --- Volume group --- VG Name dedvol System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 3 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 1 Max PV 0 Cur PV 1 Act PV 1 VG Size 14.55 TiB PE Size 4.00 MiB Total PE 3815448 Alloc PE / Size 3670016 / 14.00 TiB Free PE / Size 145432 / 568.09 GiB VG UUID 8fBcOk-aXGx-P3Qy-VVpJ-0zK1-fQgy-Cb691J

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• TCP Handshake and port numbers

  - by Guido

  (I have a question about the TCP handshake and how port numbers are assigned, if this does not belong here, let me know.) Hi, I'm studying TCP/IP from the book "Internetworking with TCP/IP" by Douglas Comer. In the TCP chapter it mentions that TCP defines an "endpoint" as a pair (IP address, port number), and a connection is defined by two endpoints. This has a few implications, such as, a local TCP port could be in several connections at once, as long as there are no two from the same IP and the same remote port. This also means that the amount of established connections is almost limitless (2^16 for every IPv4 address. 2^48 in total). Now, in class, I was told that when one connects to a listening port, both sides agree on a different port to use, so the communication can happen and the listener socket remains free. This was also my belief before reading the book. Now I feel like I should obviously trust the book (It's Comer!), but is there any truth to the other explanation? Thanks

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• Looking for software to read PDFs/web pages aloud on OS X

  - by Clinton Blackmore

  I am looking for software that will read PDFs and web pages aloud for me under OS X 10.5, preferably something that is free. I am aware that you can make your Mac read to you by pressing a key combination. It is pretty slick, but I really want something that: will allow me to say, "Read this document" and let me skip paragraphs and pause (instead of simply stopping and then restarting from the beginning) will allow me to skip things that aren't relevant, like page headers, footers, and side bars. will allow me to rewind and listen to something again (either to think on it more deeply, or to understand what the text-to-speech engine was trying to say) for a pdf with text in two columns, will let me read just one column at a time. (Right now if I make a selection, it gets both columns and reads from one and then from another. If I could just select one column and read it, I'd be happier. [IIRC, Apple improved things in Snow Leopard so you can select one column in a pdf.]) I don't really expect one program to do both pdfs and web pages, but it would be nice.

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• Ubuntu won't boot from USB memory stick

  - by mackenir

  I used the instructions on this webpage to create a bootable USB drive for running Ubuntu 9.10. Unfortunately it doesn't work on my EeePC. Even with 'Removable Dev.' selected in the BIOS as the first boot device, the PC just boots into Windows 7. How do I troubleshoot this problem? The drive is readable and looks like this: Directory of E:\ 28/10/2009 21:14 <DIR> .disk 28/10/2009 21:14 222 README.diskdefines 28/10/2009 21:14 143 autorun.inf 28/10/2009 21:14 <DIR> casper 28/10/2009 21:14 <DIR> dists 28/10/2009 21:14 <DIR> install 28/10/2009 21:14 <DIR> syslinux 28/10/2009 21:14 4,098 md5sum.txt 28/10/2009 21:14 <DIR> pics 28/10/2009 21:14 <DIR> pool 28/10/2009 21:14 <DIR> preseed 28/10/2009 21:14 0 ubuntu 26/10/2009 16:16 1,468,640 wubi.exe 25/02/2010 00:28 2,147,483,648 casper-rw 8 Dir(s) 5,290,307,584 bytes free

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• Build suggestion for mini itx server [on hold]

  - by Spyros

  I am looking to create a home server and since there does not seem to be a nice ready made one to purchase, i thought of building a mini itx one. I am not familiar with the best hardware/case to pick and therefore i thought i would ask for your experience. I will most probably install a simple linux distro, probably Debian and most probably without a desktop environment as well. Therefore, I am not looking for the best graphics card, though a decent one is preferred for sure. I would say that the most important thing is that the case/hardware play well with each other and the machine has decent specs ( i think something like 8gb RAM and 1TB hdd is most probably my most important things). I understand that this question can be closed as subjective, but it would be a great help for me if some of you guys who have been doing a similar build, can suggest something. I tried to find a stack exchange variant for the question, but it seems that this one more closely relates to the subject. But I will definitely understand it if people close it due to being subjective in nature. If you can maybe move it somewhere or so, please feel free to do so. Thank you for your time :)

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• SUSE Linux and Xen on Mac Pro - How best to prepare and configure?

  - by Andrew J. Brehm

  This is a longwinded question, so bear with me please. I have a 2009 Mac Pro with two CPUs and 8 GB of memory which is totally overpowered for Mac OS X. I am also in the process of slowly moving away from Mac OS X as my main platform. Since the Mac Pro is really new and nice I have finally decided to use it for another platform. I am familiar with Linux and SUSE Linux. Ultimately I want to run some version of SUSE Linux (recommend one, doesn't have to be free as in no money) and Xen. Here are the individual questions: Which version of SUSE Linux should I use and how do I install it on a Mac Pro? Note that the distribution must come with usable Xen. I am willing to pay. I assume Xen will work on my computer (it has VT support etc.). Is my assumption correct? I want to run Windows 7 and another instance of SUSE Linux under Xen. Is it possible to run Mac OS X Server under Xen (on a Mac Pro)? Which email client under Linux supports imap is is best-suited for integrating with MobileMe? Does SUSE Linux support the ATI Radeon HD 4870 and the Apple Cinema Display 1920 x 1200 resolution? What else should I take into account?

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• How to troubleshoot when one has no idea where to start?

  - by Chris Walton

  I am looking for hints, tips and answers on how to get started on troubleshooting when: The problem is intermittent The problem could lie literally anywhere - operating system; free source software; my own software developments; purchased software; crumbs on the keyboard; the specific combination of software I am currently running; Maxwell's demon; the little blue men actually running the machine have gone on strike; etc. I have expertise only in a few of the areas that are potential candidates for the cause of the problem. The specific problem I am having is detailed below as an example, but I am not seeking answers to my current problem, but rather where and how to start on tackling such problems. I am currently encountering a problem with my new machine. On a few occasions the machine has just frozen; not accepting keystrokes, mouseclicks, or anything except the power on/off switch. Invariably I have been merely browsing the web; I have had a few (<= 6 other applications) running. None of these applications are major; and represent a mix of commercial programs and open source programs, typically migrated from Unix of some variety. My machine is a Windows 7 I7 quad core laptop.

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• Preferred mail system/server for a company?

  - by Trevoke

  Say you are responsible for setting up an email solution at a company. Which would be your choice? I know of the following options, but many of them not well: Gordano Mail System Exchange Exim Postfix Qmail Zimbra For having used it a little over two years, I really, really like Gordano Mail System. They offer a whole bunch of things, like calendaring, anti-spam, anti-virus, extremely complete and filterable logging options, aliases, a customizable webmail interface... And their software can be installed on both a Windows or Linux OS. In addition, their support is top-notch, their knowledgebase comprehensive (and, I will admit with a touch of pride, I have contributed, with my questions, to the addition of a few articles in there). Of course, they're not free, which can be a problem, but they're not Exchange, and they do offer pretty much everything that Exchange offers -- which is great if you want to stay away from that, but need all the features. Although, if you need a Blackberry Exchange Server, or something similar, I'm not sure what you should go for. So.. What would your choice be? Why? I've never played with a more DIY email solution, but I'm sure many people here have and wouldn't trade their setup for the world :)

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