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• What is bottleneck of my Apache server ?

  - by rrh

  $netstat -anp | grep :80 | grep TIME_WAIT | wc -l 840 $netstat -anp |grep :80 | grep ESTABLISHED | wc -l 50 memory usage : 850MB / 1000MB apache2.conf contains.. <IfModule mpm_prefork_module> StartServers 5 MinSpareServers 5 MaxSpareServers 10 MaxClients 150 MaxRequestsPerChild 0 </IfModule> <IfModule mpm_worker_module> StartServers 2 MinSpareThreads 25 MaxSpareThreads 75 ThreadLimit 64 ThreadsPerChild 25 MaxClients 150 MaxRequestsPerChild 0 </IfModule> <IfModule mpm_event_module> StartServers 2 MaxClients 150 MinSpareThreads 25 MaxSpareThreads 75 ThreadLimit 64 ThreadsPerChild 25 MaxRequestsPerChild 0 </IfModule> Are there any configuration changes that can help me or its just my RAM the bottleneck here? Urgent help needed..!!

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• Spam is Killing Me - Can I use GMail as a spam filter?

  - by kirkouimet

  I'm getting at least 50 Viagra ads a day and it's driving me insane. I currently have a hosted MS Exchange account and a Gmail account. My Gmail account forwards to my Exchange account. Both of my addresses are used evenly, and it has been really nice to have all of my e-mail end up in my Exchange box. I like replying from one address consistently, which is my Exchange address. Spam sent to my Gmail address is always caught, where spam sent to my Exchange is getting passed straight through to me. I don't want to have two spam filtration systems that have quarantines that I need to check frequently for false positives. Here is my question: Can I setup my MX records such that all e-mail sent to my Exchange address is forwarded to my Gmail account, which will then forward it to my Exchange account? Kind of like using Gmail as the middle man.

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• How do I set logfile rotation limit for CF8 -out logs?

  - by melikeum

  I'm trying to set the number of logs to keep for the CF -out logs. I found a jrunsvc command line switch to set this but it throws an error saying the value must be at least 1000: jrunsvc.exe -logfileRotationLimit 50 "ColdFusion 8 Application Server" Error: log file rotaion limit must be at least 1000 The default is 200 files which seems excessive but 1000 is even worse. Am I not understanding this value properly? I did set it to 1001 and then I found this registry entry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\ColdFusion 9 Application Server\LogFileRotationLimit I'm hesitant to set it there manually in case the value does not equal the number of files to keep.

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• Postfix not delivering mails

  - by Sotocan

  I have problems with a recently configured postfix MTA. When postfix starts the following warning appears: "postfix/qmgr[5078]: warning: connect to transport private/filter: No such file or directory" I have amavis-new as a content-filter, but even if I comment-out the relevant line, the warning appears. As a result (I think), of the above, I get errors like below, for every virtual domain that I have: "postfix/error[5080]: 254851834107: to=, relay=none, delay=13082, delays=13082/0.01/0/0.01, dsn=4.3.0, status=deferred (mail transport unavailable)" The good news for me, is that somehow I managed to fix that (don't ask me how!!!!) The problem is that now I have 50 or so mails, that were affected by the aforementioned problem, in the mail-queue... If I "postqueue -f " I get the same style of error as before (mail transport unavailable)...however new mails are delivered to their final destination properly... Any suggestions? Kind regards. P.S. Local mail delivery from/to Unix and virtual users, was OK write from the beginning!

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• Possible to change the order of the shortcut locations in windows explorer

  - by Codezilla

  When you open a new explorer window by default it loads from the starting position "Computer" which shows your drives, etc. This is all well and good except when explorer loads it bumps the scroll bar down so that half the favorites are cut off. I can scroll up to get to the ones I want but that gets really old doing that 50 times a day. I do clean out my favorites frequently but more are added all the time and used. In trying to come up with a fix for this problem I thought maybe it would be possible to move the link to "Computer" to be at the very top and the "Favorites" area directly under that but I can't figure out a way to do that. Anyone have an idea? Or maybe another solution I haven't thought of?

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• overload environment

  - by Richo

  I've recently switched across to nesting my home directory across all my machines in an svn repo, meaning that my utility scripts, configuration (irssi, vim, zsh, screen etc) as well as my .profile and so forth are easier to keep up to date across all the places I login. I use a set of sourced .local files to override them on a per site basis as required. As it stands, many of my scripts inherit some form of configuration, and for the most part I've been setting an environment variable in .profile, and then if needed on a per site basis overriding it in .profile.local This works great, but are there pitfalls in having a stack of environment variables? If I take my default environment from within an X session before any of my personal configuration I have not even increased it by 50% but some of the machines I work on are low resource, am I bloating my system unneccessarily, or being needlessly paranoid? Should I start moving this config into seperate flatfiles that are loaded as needed? This means extra infrastructure, or alternately writing a single module for storing config that all of my utilities can inherit.

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• Why is this MySQL FULLTEXT query returning 0 rows when matching rows are present?

  - by Don MacAskill

  I have a MySQL table with 200M rows which has a FULLTEXT index on two columns (Title,Body). When I do a simple FULLTEXT query in the default NATURAL LANGUAGE mode for some popular results (they'd return 2M+ rows), I'm getting zero rows back: SELECT COUNT(*) FROM itemsearch WHERE MATCH (Title, Body) AGAINST ('fubar'); But when I do a FULLTEXT query in BOOLEAN mode, I can see the rows in question do exist (I get 2M+ back, depending): SELECT COUNT(*) FROM itemsearch WHERE MATCH (Title, Body) AGAINST ('+fubar' IN BOOLEAN MODE); I have some queries which return ~500K rows which are working fine in either mode, so if it's result size related, it seems to crop up somewhere between 500K and a little north of 2M. I've tried playing with the various buffer size variables, to no avail. It's clearly not the 50% threshold, since we're not getting 100M rows back for any result. Any ideas?

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• Do I need to create static routes for my home network?

  - by SZU

  50.x.x.x assigned by Frontier 192.168.1.1 Actiontec (FiosModem/Router) 192.168.1.2 Voip 192.168.1.3 DLINK/DIR615 (WirelesRouter) 192.168.1.3 assigned by Actiontec 192.168.2.1 DLINK DIR615 (Hardwired to Actiontec) 192.168.2.194 Android 192.168.2.195 Vista-PC1 192.168.2.196 WIN7-PC2 192.168.2.197 Linksys-1 WRT54G/DDWRT(WirelessClient) 192.168.2.198 Linksys-2 WRT54G/DDWRT(WirelessClient) 192.168.2.199 DSi 192.168.2.197 assigned by DLINK 192.168.3.1 Linksys-1 WRT54G/DDWRT 192.168.3.100 Vista-PC3 192.168.2.198 assigned by DLINK 192.168.4.1 Linksys-2 WRT54G/DDWRT 192.168.4.100 Ubuntu-PC4 Above is my current setup. All PCs have Internet access. PC3 and PC4 cannot see each other and PC1/PC2 cannot see PC3/PC4. Do I need static routes between PC3 & PC4, PC1/PC2 & PC3/PC4? If how do I create the static routes?

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• Remove Windows 7's limitation on number of concurrent tcp connections (http web requests)

  - by Ghita

  I have an application that tries to open as many http requests as possible (in order to stress test a proxy implementation) It seems to me that Win7 (SP1) may have a limitation on number of concurrent opened connection (it may be the so called half-open state if I'm not wrong). Is there something I can do for client ? and also I test using a vista PC that acts as a proxy server. It would be great if I could configure it to sustain at least 50 new connections initiated / second on client side and many more on server. I made the modification according to this technet article by setting TcpNumConnections = 150 but it doesn't make a difference. I still only see about 20 tcp sockets associated with my http client by using tcpview.

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• Kill UDP port that has no process?

  - by Chocohound

  I can't bind to UDP port 500 from my code (yes I'm running w/ sudo). The port is reported as "already in use" (Mac os X), but doesn't have an associated process: $ sudo netstat -na | grep "udp.*\.500\>" udp4 0 0 192.168.50.181.500 *.* udp4 0 0 192.168.29.166.500 *.* But sudo lsof doesn't show a process on port 500 (ie sudo lsof -i:500 -P reports nothing). How can I unbind port 500 so I can use it again? I believe I have a bad VPN client that isn't cleaning up after itself, but I can't get rid of this without rebooting the machine.

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• Why is hosted storage so expensive?

  - by Mark Henderson

  There are many questions on Server Fault asking why server storage is so expensive. e.g. Why do I have to pay 50 bucks a month per extra gigabyte of storage or Our file server is always running out of space, why doesn't our sysadmin just throw an extra 1TB drive in there? These questions usually come from people who lack an understanding of how enterprise-level storage works and what influences the price. This question is designed to be the "question to end all questions" regarding the price of enterprise storage.

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• Ubuntu 9.10 Dowload Speed Very Slow

  - by Don

  I'm running Ubuntu 9.10 desktop and I'm new to the Linux world, so bear with me. I'm on a corporate network of 3 T1s shared across 50-60 users. I typically get about 300 KB/sec for downloads, but for whatever reason, the Linux box will start out in that range, then drop to less than 1KB/Sec sometimes. Doesn't seen to matter where I'm downloading from. Right now I'm trying to get Eclipse for PHP and it's running at 3-6KB/sec. Getting the updates for the system will also drop to very slow rates. Our IT person has set up the machine to get the same 10.0.0.x address when it starts, and moved this IP to bypass our Proxy/Firewall going out, so that shouldn't be the issue. Can anyone recommend something I can try to better diagnose the problem. Again, I'm new to the Linux world and the hardware/OS setup side in general (coming form more of a coding background). Thanks for any advice.

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• Setting font size of Closed Captions on iPhone

  - by forthrin

  Does anyone know if it's possible to control the font size on videos played in the built-in iPhone video player? The subtitles (or "Closed Captions") that are there by default are rather small. None of the attempts below change the font size at all: ffmpeg -y -i in.mkv -i in.srt -map 0:0 -map 0:1 -map 1:0 -vcodec copy -acodec aac -ab 256k -scodec mov_text -strict -2 -metadata title="Title" -metadata:s:s:0 language=eng out.mp4 sudo port install mplayer +mencoder_extras +osd mencoder in.mkv -sub in.srt -o out.mp4 -ovc copy -oac faac -faacopts br=256:mpeg=4:object=2 -channels 2 -srate 48000 -subfont-text-scale 10 -of lavf -lavfopts format=mp4 mp4box -add output.ttxt:hdlr=sbtl:size=50 output.mp4 Should we assume that iOS simply disregards size information, or has anyone ever seen styling of subtitles actually work on iOS? Anyone know how to make this work?

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• What can I do to configure my SSH such that it pauses for a flaky connection?

  - by kfmfe04

  I run ssh from OSX to a Ubuntu box - under home WIFI, everything works perfectly. However, when I ssh from certain external networks, ssh may be working fine for a minute or two and then drop due to a flaky network (diagnosed by pinging 8.8.8.8). How can I set up ssh so that it simply waits/pauses rather than drop (when dropping, I have to setup my development environment from scratch - a big hassle). EDIT When I say a bad connection, I mean, for example, ping 8.8.8.8 will work fine for a while, and then fail for 40-50 pings, and then come back on again.

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• HTTP transfer speeds start fast then slows to a crawl

  - by AnITAdmin

  We just got a new dedicated 1 gigabit server running IIS. The CPU is 15% or less, the RAM (4 GB total) has 3 GB unused... We are pushing 110 mbits per second... Speeds are really slow.. And, if fact, here's how it happens: We connect, and then the speeds are really fast, and quickly decline to 40 kBps or less. What's going on? It seems the server just wont go above 120 mbits per second. The files are all very large. 50 MB to 500 MB... Could this be a factor? Again, CPU, RAM, UI responsiveness when accessing remotely all seem fine.

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• Unique string values in range

  - by Dean Smith

  I have some spreadsheets where there are large number of cells that have essentially been used for free text. There is a finite set of values for this free text and most, if not all repeat. eg. A B C D 1 Monkey Gorilla Cat Dog 2 Dog Cat Gorilla Gorilla 3 Dog Dog Dog Cat There are probably 50 or so different cell values spread over multiple sheets and hundreds of rows and columns. I need to analyse this data and count occurancies, which is not a problem other than getting a list of unique values to start with and this has been driving me up the wall. What is the best way to produce this list. So from the above we would have Monkey Dog Cat Gorilla In order of preferred solutions, as this will need to be done monthly. Dynamic formula based VB Script Other ( Advanced filtering or other manual steps )

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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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• How to install Windows 8 boot manager in a different partition?

  - by arnab321

  the last time i installed Windows 7, the boot manager automatically got installed in a small hidden partition, and the main os into another partition. So, formatting the c: won't affect the boot manager. yesterday i wiped and repartitioned my hdd like this: 50mb primary ntfs (meant for boot manager) 100gb primary ntfs (for win 8) 50gb primary ntfs (for win 7) some logical partitions to install ubuntu and other os i installed win 7 and then win 8, and now there is no os choosing menu. system directly boots win 8 and the 50 mb partition is empty. There is a way to boot Windows 7 and even Ubuntu directly from the Windows boot manager with EasyBCD. But How do i put the boot manager in the 50mb partition ?

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• Printing Booklet Page Size in Adobe Reader 4-in-1

  - by Justin Nathanael Waters

  So I have a 70 page pdf document that I'm trying to condense to a small booklet. I tried creating a formula to manually to perform it but it got ugly fast. 35,36,34,37,17,54,16,55,33,38,32,39,15,56,14,57,31,40,30,41,13,58,12,59 29,42,28,43,11,60,10,61,27,44,26,45,9,62,8,63,25,46,24,47,7,64,6,65 23,48,22,49,5,66,4,67,21,50,20,51,3,68,2,69,19,52,18,53,1,70 Once I print the booklet I should be able to cut the sheets in half and set the bottom half behind the top and staple it for a simple book. Which means Page 1 should have pages 35,36,17,54,34,37,16,55 Page 2 should have pages 33,38,15,56,32,39,14,57 And several pages later Page 9 should have pages 19,52,1,70,18,53 But manually doing this is a headache and it seems like the booklet function should contain functionality that can perform this. I'm using a commercial Konica Minolta C452

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• Where to look for regular scripts?

  - by fontan

  It seems to me that our server freezes every 30 days around noon due to the huge utilization of xvda data transfer partition - writes are 50 times higher than normally (according to the health monitor in plesk). This seems to me as the reason why the apache & co becomes instable as (for example) all apache's processes are waiting to write their log (according to the service's full status). I am, however, unable to find any scheduled task that would be executed during that period. I have checked both cron and anacron setup and there is only one monthly anacron task which is not executed (according to the /var/log/cron - and there is nothing unusual) around noon. Are there any other places where to look for periodical processes? (I am just about to ask server's provider the same question about any external maintenance run around this time but I don't expect them to run anything time/resource consuming during the day.)

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• Can I use my Belkin router as a repeater?

  - by Kyle R

  I've got a brand new, unopened Belkin N600 DB router (yay 50% off sale), and I can't seem to figure out if I can use it as a repeater. As far as I can tell, it doesn't support DD-WRT or Tomato, but I'm wondering if there may be some way to rig it up to repeat Wifi. Also, I really need to know before I open it, because, being a bit tight on money at the moment, I'll probably sell it if I can't use it as a repeater. Finally, two caveats: I can't use the other wireless router for anything other than broadcasting straight from the modem (parents are paranoid about anything technological). I can't run ethernet to the second router due to the layout of the house. Thanks so much for the help everyone--if I'm being vague, tell me! EDIT: Also, the manual here is pretty useless on this topic as far as I can tell.

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• Tools for tracking disk usage

  - by Carey

  I manage a number of linux fileservers. These all run applications written from 0-10 years ago. As sometimes happens, a machine will come close to, or run out of disk space. Reasons include applications not rotating log files, a machine with 500GB of disk producing 150GB of new files every month that were not written to tape, databases gradually increasing in size, people doing silly things...generally a bit of chaos. Anyway, when a machine unexpectedly goes from 50% to 100% full in a couple of hours, I figure out what broke (lots of "du") and delete files or contact someone. I also can look at cacti graphs to figure out what the machine's normal disk usage is (e.g. for /home). Does anyone know of any tools that will give finer grained information on historial usage than a cacti/RRD graph? Like "/home/abc/xyz increased 50GB in the last day".

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• SSH disconnects active session after 20 minutes

  - by Paramaeleon

  I’ve just set up a new Linux box (OpenSuSE 12.3 on VmWare). Now I stated that my SSH shell sessions are disconnected exactly after 20 minutes, clearly with activity. (Putty: “Network error: Software caused connection abort”) I already set Putty to send keep alives every 64 sec. In sshd_config, I set ClientAliveInterval 50 ClientAliveCountMax 2 and did a deamon reload. Didn’t help. About two minutes after the link breakdown, ssh reports to /var/log/messages: … … sshd[…]: Timeout, client not responding. … … sshd[…]: pam_unix(sshd:session): session closed for user root I don’t encounter this behaviour when connecting to other virtual machines, so I guess the problem isn’t in the network. Any help is appreciated.

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• Alternatives to y4mstabilizer; deshaking video

  - by Vi

  "Deshaking" means fixing the video captured from camera hold in hands. Is there open source video deshaker apart from y4mstabilizer from mjpegtools? Patch for mencoder is preferred. My current command line for processing video looks like: mplayer video_from_camera.avi -nosound -vo yuv4mpeg:file=/dev/stdout -really-quiet | y4mstabilizer -n -a 0.8 -r 30 -s 100 | mplayer -cache 1000 /dev/stdin -noconsolecontrols -vf crop=500:380:70:50,denoise3d=3:3:5:5 -vo yuv4mpeg:file=temporary.yuv y4mstabilizer is itself very unstable and often crashes (and it didn't work at all until I have patched memory allocation in it).

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• Database implementation question?

  - by gundam

  consider a disk with a sector size of 512 bytes, 2000 tracks/surface, 50 sectors/track, 5 doubled sided platters, average seek time is 10 msec. Assume a block size of 1024-byte is selected. Assume a file that contains 100,000 records of 100-byte each is to be stored on the disk, and NONE of the reocd can be spanned 2 blocks. How many blocks are needed to store the entire file?? If the file is arranged sequentially on disk, how many surfaces are required?? Now, i have calculated that 10,000 blocks are needed to store 100,000 records. But i am not sure how to find out the answer of the surfaces required. I only calculated the capacity of track is 25KB and capacity of surface is 50,000 KB But I don't know how to calculate the number of surfaces... Could anyone help me how to get the answer? Thanks a lot!!

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