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• How to make BASH try and autocomplete on Enter

  - by swatso33

  I've noticed that for many of the commands I use in bash I have actually learned how many letters of the command I must type before I can press [TAB] to have bash successfully autocomplete the command. For example when opening chromium I dont usually type the whole command but instead type $ chrom[TAB][ENTER] and bash successfully autocompletes the command to chromium before I hit the [ENTER] key. Is there a way to make autocomplete work without having to hit [TAB]? My general thinking is that if I type $ chrom[ENTER] bash could check and see that chrom isnt a valid command, but it would make sense to autocomplete it to chromium since that is the only command that starts with chrom

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• How to load tun module in linux?

  - by rabipelais

  I cannot manage to load the tun module in my archlinux box. I'm trying to connect with openvpn, but the log says nm-openvpn[6662]: Note: Cannot open TUN/TAP dev /dev/net/tun: No such device (errno=19) lsmod | grep tun returns nothing. If I run sudo modprobe tun it returns failure, but no error message, and lsmod still has no tun. The module seems to exist, as there is a tun.ko.gz in /lib/modules/....... I really dont know what else to try. Thanks in advance

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• How to configure nginx to serve static contents from RAM?

  - by Vijayendra Tripathi

  I want to set up nginx as my web server. I want to have image files cached in the memory (RAM) rather then disk. I am serving a small page and want few images always served from RAM. I dont wish to use varnish (or any other such tools) for this as I believe nginx has a capability to cache contents into RAM. I am not sure as how may I configure nginx for this? I did try few combinations but they didn't work. nginx uses disk all the time to get images. For example, when I tried apache benchmark to test with following command - ab -c 500 -n 1000 http://localhost/banner.jpg I get following error - socket: Too many open files (24) I guess this means nginx is trying to open to many files simultaneously from the disk and OS is not allowing this operation. Can anyone please suggest me a correct configuration? Thanks for considering this message.

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• Ho do you view all your monitoring software

  - by BLAKE

  In my office I have all our monitoring tools setup and working great, but I dont have an easy way to view them. I have a large TV in my office plugged into an old PC that has my nagios status page always showing. If I need to change anything on that computer I use Synergy to access the computer from my desktop. We are thinking about adding another TV and I want some suggestions on setting it all up. We are a 99.99% Windows shop. What do you use to run all the TV's in your helpdesk? Synergy works for me, but what if one of the other admins want to change the screen? Is there any easy way that any of us (currently 4 people) can change the screen from our desktops? (Remote desktop doesn't work because it locks the console which is the output to the TVs.) Any advice would help, Thanks.

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• odd system name showing up in terminal

  - by sam

  Ive been working on some command line stuff with an external developer through team viewer for work, to interact with th CL i use terminal on OSX, when working with the developer i was always watching what they were doing and i also have all the bash history. Usually upon opening terminal i get something like this Last login: Tue Sep 17 21:33:02 on ttys001 You have mail. unknown-5c:00:00:00:00:00:~ sam$ (note ive replaced some characters in the last line with 00) But today when i opened up terminal and i get this Last login: Mon Oct 21 16:49:35 on ttys000 You have mail. richies-ipad:~ sam$ Note it now says richies-ipad - any idea why this is ? I dont know any one called richie let alone let them have access to my machine. Is this something to be worried about - the fact that someone has enough access to change that ? Also what does the ttys001 part on the first line mean ?

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• How important is W3C XHTML/CSS validation when finalizing work?

  - by Andrew G. Johnson

  Even though I always strive for complete validation these days, I often wonder if it's a waste of time. If the code runs and it looks the same in all browsers (I use browsershots.org to verify) then do I need to take it any further or am I just being overly anal? What level do you hold your code to when you create it for: a) yourself b) your clients P.S. Jeff and company, why doesn't stack overflow validate? :) EDIT: Some good insights, I think that since I've been so valid-obsessed for so long I program knowing what will cause problems and what won't so I'm in a better position than people who create a site first and then "go back and fix the validation problems" I think I may post another question on stack overflow; "Do you validate as you go or do you finish and then go back and validate?" as that seems to be where this question is going

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• how to check in a bash script where the shell is run from

  - by nass

  I am fuzzy about how to set a command in a script to be run only when the shell is running within an X session. basically, in ~/.bashrc I set my keyboard maps as setxkbmap -layout 'us,gr' -variant 'altgr-intl,extended' -option grp:alt_shift_toggle If I am connecting through putty , or otherwise, and i just open a command prompt window, I DONT want this command to run. If on the other hand, i have an X session running (locally or remotely) I want this command to run. how can I do this checking in a bash script? Is there a bash environment variable I can be looking at? some other way? Thank you for your help

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• which regular expression will capture this sequence?

  - by John Smith

  The text follows this pattern <tr class="text" (any sequence of characters here, except ABC)ABC(any sequence of characters here, except ABC) <tr class="text" (any sequence of characters here, except ABC)ABC(any sequence of characters here, except ABC) <tr class="text" (any sequence of characters here, except ABC)ABC(any sequence of characters here, except ABC) <tr class="text" (any sequence of characters here, except ABC)ABC(any sequence of characters here, except ABC) so basically the above line might repeat itself multiple times, and the idea is to retrieve the first 3 characters immediately after ABC. I have tried regular expressions along the lines of \<tr class="text" [.]+ABC(?<capture>[.]{3}) but they all fail. Can someone give me a hint?

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• Could not open the dk file

  - by IgnacioRivera

  I dont know what I have done, but it is over a month now that I can not open my virtual machine, I'm using a MacBookPro with Fusion 2.0.6. I recently upgraded my system to Snow Leopard. but it was working fine. Now I get a message that says" File not found: Windox XP. vmdk. I went to all my backups and when I unpack the files in the virtual machine, there is not such a file. the only file that I can see that may contents the data is the .vmem file that show to have 1.2 GB of data. I have tryed and tryed to contact VMware support but it has become an impossible task, If theres someone that could give me some ideas on how to recover my virtual machine????

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• Simple hardware RNG

  - by roygbiv

  I made a tongue-in-cheek comment to this question about making a hardware RNG. Does anyone know of any simple plans or can anyone descibe a simple hardware based RNG and the software to drive it? Go to Radio Shack. Buy a diode, an NTR resistor, a capacitor and serial cable. Cut off the end of the serial cable that does not fit on your computer. Solder the diode and resistor in series between pins DTR and DSR of the cable. Solder the capacitor between DSR and TXD pins. Write a small C program to do the following: Set DTR to 1. Start Timer. Monitor DSR until it goes to 1. Stop Timer. Calculate resistance from elapsed time. Retreive serveral bits from that value to use as part of random number. Repeat until enough bits have accumulated.

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• Trac FastCGI + Python on dreamhost leaves zombie python running

  - by Katsuke

  Hello there, Recently I installed trac in one of my dreamhost domains. I followed the instructions of http://trac.mlalonde.net/wiki/CreamyTrac and everything worked perfectly. At least i thought that was the case. After a few days, i started to notice that i was getting random 500 pages. I quickly checked the error log, and found a bunch of: [Fri Apr 16 14:35:34 2010] [error] [client *.*.*.*] Premature end of script headers: dispatch.fcgi [Fri Apr 16 14:35:54 2010] [error] [client *.*.*.*] Premature end of script headers: dispatch.fcgi, referer: http://www.trac.****.com/login [Fri Apr 16 16:05:58 2010] [error] [client *.*.*.*] Premature end of script headers: dispatch.fcgi, referer: http://www.trac.****.com/timeline The trac instance has very low traffic so it is possible that this might have been triggered faster if there was more use of it. So next step i went to look at top and am amazed by what i see: (this is NOT exactly what i saw, i just reproduced this from memory) 23730 rl_inst 20 0 44516 15m 4012 S 0.0 0.4 0:00.17 python2.4 23731 rl_inst 20 0 44616 15m 4012 S 0.0 0.4 0:03.17 python2.4 23732 rl_inst 20 0 44116 15m 4012 S 0.0 0.4 0:01.17 python2.4 23733 rl_inst 20 0 44826 15m 4012 S 0.0 0.4 0:04.17 python2.4 23734 rl_inst 20 0 44216 15m 4012 S 0.0 0.4 0:02.17 python2.4 23735 rl_inst 20 0 44416 15m 4012 S 0.0 0.4 0:01.17 python2.4 I opened the trac site again and that changed to this: 23730 rl_inst 20 0 44516 15m 4012 S 0.0 0.4 0:00.17 python2.4 23731 rl_inst 20 0 44616 15m 4012 S 0.0 0.4 0:03.17 python2.4 23732 rl_inst 20 0 44116 15m 4012 S 0.0 0.4 0:01.17 python2.4 23733 rl_inst 20 0 44826 15m 4012 S 0.0 0.4 0:04.17 python2.4 23734 rl_inst 20 0 44216 15m 4012 S 0.0 0.4 0:02.17 python2.4 23735 rl_inst 20 0 44416 15m 4012 S 0.0 0.4 0:01.17 python2.4 28378 rl_inst 20 0 2608 1208 1008 S 0.0 0.0 0:00.00 dispatch.fcgi 28382 rl_inst 20 0 44248 15m 4012 S 0.0 0.4 0:02.19 python2.4 So the dispatch.fcgi was being called correctly and was spawning correctly other python2.4 process. After the IDLE time passed this is the results: 23730 rl_inst 20 0 44516 15m 4012 S 0.0 0.4 0:00.17 python2.4 23731 rl_inst 20 0 44616 15m 4012 S 0.0 0.4 0:03.17 python2.4 23732 rl_inst 20 0 44116 15m 4012 S 0.0 0.4 0:01.17 python2.4 23733 rl_inst 20 0 44826 15m 4012 S 0.0 0.4 0:04.17 python2.4 23734 rl_inst 20 0 44216 15m 4012 S 0.0 0.4 0:02.17 python2.4 23735 rl_inst 20 0 44416 15m 4012 S 0.0 0.4 0:01.17 python2.4 28382 rl_inst 20 0 44248 15m 4012 S 0.0 0.4 0:02.19 python2.4 dispatch.fcgi was gone but the corresponding python2.4 was still there o_O. I had started with 5 sleeping processes of python and after idle time i ended up with 6. I repeated this and found that it kept spawning more and more python2.4, this was indeed what was causing my 500s indirectly. Let me explain my findings. Am on a shared hosting so my processes get killed if they are way too many. So everytime i opened trac 2 new processes spawned and one remained, to the point that dreamhost was killing a random process when i reached my limit. Sometimes killing the python2.4 that actually was rendering the current page. Hence header premature ending, python is gone the .fcgi doesnt know what to do and throws an 500. I found a dirty solution to this. I changed my dispatch.fcgi to contain a line that killed any currently running python2.4 process and then spawn a new one. Since then i dont get any rogues what so ever. But i dont think this is the best solution, calling killall in every fcgi just seems wrong. Anyone has run into this issue and found a cleaner solution? Is there anything that i have overlooked?

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• How do I expose a webapp on :8090, even though firewall allows only :80 and :22

  - by Kaustubh P

  I am a noob in Server related stuff, so bear me. I use amazon webservices (EC2) on which I have a webapp running on jetty, which runs on port 8090. I deploy the webapp through the usual method of java -jar start.jar So then to access the app, I have to add a port in the URL, like this: someIP:8090/app But just typing someIP in the browser takes me to a page that shows It works! This is the default web page for this server. The web server software is running but no content has been added, yet. which I assume is apache. I have apache, tomcat and jetty installed. What can I do so that I dont have to specify the port? Do I have to perform port-forwarding? Thanks a lot.

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• Create My own language with "Functional Programming Language"

  - by esehara

  I prefer Haskell. I already know How to create my own language with Procedural Language (for example: C, Java, Python, etc). But, I know How to create my own language with Functional Language (for example Haskell, Clojure and Scala). I've already read: Internet Resources Write Yourself a Scheme in 48 Hours Real World Haskell - Chapter 16.Using Persec Writing A Lisp Interpreter In Haskell Parsec, a fast combinator parser Implementing functional languages: a tutorial Books Introduction Functional Programming Using Haskell 2nd Edition -- Haskell StackOverflow (but with procedural language) Learning to write a compiler create my own programming language Source Libraries and tools/HJS -- Haskell Are there any other good sources? I wants to get more links,or sources.

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• Get LDAP Information For University Email. For Thunderbird

  - by Dhruvenkumar Shah

  I am a Student at Northeastern University. They use G-Apps for email ids, so whenever I need to email someone, using university Id which ends with husky.neu.edu. I have to go Gmails compose mail, They have some LDAP Setting by which I get all the email ids using AJAX in "To" as soon as I start typing. I want to configure same in Thunderbird, I contacted university but they are not able to help me. Is it possible that on my G-Apps Gmail Settings those LDAP Parameter needed for configuration are presents? Can anyone help me? I want to configure a directory reference in my email client thunderbird, I dont know the parameters to use, it is possible I can get it somehow?

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• Send all traffic over VPN connection not working Windows VPN host

  - by Adam Schiavone

  I am trying to get a mac (10.8) to connect to thru vpn to a server running Windows Server 2008 R2 pass all requests from the mac to the server. The VPN is setup and I can connect and access the server thru a web browser, but for all other sites, the DNS lookup fails. I have tried adding a DNS server to the VPN Host. ex. Lets say the the VPN server also hosts a website example.com. I connect to the VPN with my mac and point a browser to example.com and everything works fine. but when I point the browser to google.com it just sits there and will eventually come back with a DNS lookup failed message. HOWEVER: I tried running the command dig @myServersIpHere www.google.com. on the mac and it comes back with correct IP addresses. I really dont know what to do from here. How can I route all requests from my mac, thru my windows server via VPN?

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• Simple object creation with DIY-DI?

  - by Runcible

  I recently ran across this great article by Chad Perry entitled "DIY-DI" or "Do-It-Yourself Dependency Injection". I'm in a position where I'm not yet ready to use a IoC framework, but I want to head in that direction. It seems like DIY-DI is a good first step. However, after reading the article, I'm still a little confused about object creation. Here's a simple example: Using manual constructor dependency injection (not DIY-DI), this is how one must construct a Hotel object: PowerGrid powerGrid; // only one in the entire application WaterSupply waterSupply; // only one in the entire application Staff staff; Rooms rooms; Hotel hotel(staff, rooms, powerGrid, waterSupply); Creating all of these dependency objects makes it difficult to construct the Hotel object in isolation, which means that writing unit tests for Hotel will be difficult. Does using DIY-DI make it easier? What advantage does DIY-DI provide over manual constructor dependency injection?

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• Formatting jquery timeline?

  - by Beginner

  I am using a timeline plugin from here This is my current code: <ul id="dates"> <li><a href="#1940s">1940s</a></li> <li><a href="#1950s" class="selected">1950s</a></li> <li><a href="#1960s">1960s</a></li> <li><a href="#1970s">1970s</a></li> <li><a href="#1980s">1980s</a></li> <li><a href="#1990s">1990s</a></li> <li><a href="#2000s">2000s</a></li> </ul> <ul id="issues"> <li id="1940s"><img src="/gfx/timeline/1950.jpg" /> <h1>1940's</h1> <p>Ronald.</p> </li> <li id="1950s"><img src="/gfx/timeline/1960.jpg" /> <h1>1950's</h1> <p>Eddy.</p> </li> <li id="1960s"><img src="/gfx/timeline/1970.jpg" /> <h1>1960's</h1> <p>1960s</p> </li> <li id="1970s"><img src="/gfx/timeline/1980.jpg" /> <h1>1970's</h1> <p>1970s</p> </li> <li id="1980s"><img src="/gfx/timeline/1990.jpg" /> <h1>1980's</h1> <p>1980s</p> </li> <li id="1990s"><img src="/gfx/timeline/1990.jpg" /> <h1>1990's</h1> <p>1990s</p> </li> <li id="2000s"><img src="/gfx/timeline/2000.jpg" /> <h1>2000s</h1> <p>2000s</p> </li> </ul> But I don't understand how I can make it look like this... Any assistance?thanks Current CSS: #timeline { width: 660px; height: 350px; overflow: hidden; margin: 100px auto; position: relative; background: url('Img/vline.png') left 65px repeat-x; } #dates { width: 660px; height: 60px; overflow: hidden; } #dates li { list-style: none; float: left; width: 100px; height: 50px; font-size: 24px; text-align: center; background: url('Img/hline.png') center bottom no-repeat; } #dates a { line-height: 38px; text-decoration:none; color:#999; font-size:15px; font-weight:bold; } #dates .selected { font-size: 38px; color:#000; } #issues { width: 660px; height: 350px; overflow: hidden; } #issues li { width: 660px; height: 350px; list-style: none; float: left; } #issues li img { float: right; margin: 100px 30px 10px 50px; } #issues li h1 { color: #999; font-size: 20px; margin: 20px 0; } #issues li p { font-size: 14px; margin-right: 70px; font-weight: normal; line-height: 22px; }

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• Prolog n00b question: Doing whatever

  - by dmindreader

  I want to load this simple something into my Editor: Write:-repeat,write("hi"),nl,fail. So that it prints "hi". What should I do? I'm currently trying to do File->New and Saving a file named Write into E:\Program Files\pl\xpce\prolog\lib When doing the query: ?-Write. It's printing: 1 ?- Write. % ... 1,000,000 ............ 10,000,000 years later % % >> 42 << (last release gives the question) Why?

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• highlighting words at the end of a word

  - by fusion

  i'm not sure how i could have phrased the title better, but my issue is that the highlight function doesn't highlight the search keywords which are at the end of the word. for example, if the search keyword is 'self', it will highlight 'self' or 'self-lessness' or 'Self' [with capital S] but it will not highlight the self of 'yourself' or 'himself' etc. . this is my highlight function: function highlightWords($text, $words) { preg_match_all('~\w+~', $words, $m); if(!$m) return $text; $re = '~\\b(' . implode('|', $m[0]) . ')~i'; $string = preg_replace($re, '<span class="highlight">$0</span>', $text); return $string; }

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• Writing my first bash script (line 2: testscript: No such file or directory)

  - by skyeagle

  I am attempting to write my first shell script (I'm running Ubuntu 10.x) This is what my 'script' looks like cd /path/to/directory/cronscripts . testscript I put the following debug statements (after the cd), in the script above to make sure everything was ok: pwd echo `ls -lhrt` and it displayed all the files in the directory. So I dont understand the error message I am getting. I have the following two questions Why am I getting the above error message and how do I fix it? My script seems to run fine without a shebang in the first line - infact when I try either of the following: #!/usr/bin/bash #!/usr/bin/bash env I get the following error message: /usr/bin/bash: bad interpreter: No such file or directory What is the purpose of the shebang statement and why do I get the above error when I try to include it in my script/ how do I fix it, so I can add the shebang (is it necessary? - it seems most script examples have the shebang - but I'm not sure if it is a must, as the script runs without it).

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• send outgoing email via postfix from mail client

  - by Ey Jay

  I have installed postfix on my ubuntu that is hosted on digitalocean. What I want to do is. With my smtp server setup, I want to use it to send mail from my email client. I don't need to receive, I just need to send. I can telnet example.com 25 successfully, I received the email in my inbox, but when I tried using in a email client. smtp: example.com:25 user: smtp1user password: smtp1userpassword I get an error that says "Server doesn't respond. Try changing the port." I dont know how to proceed.

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• Keyboard / mouse freeze

  - by ajvb

  Hello, Pretty much on a daily basis the keyboard & mouse on my Dell PC stop responding. I have left the PC on for over 10 minutes but still no response so I have to power on / off. Keyboard / mouse then work fine. I did have 2 mice attached to the PC but I have now removed one to see if this makes any difference. CPU temperatures are 51C & 48C - dont know whether this is normal or high? OS is Windows 7. Adrian

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• windows service "soft link"

  - by fred smith

  I would like to be able to have a nice management tool to allow the rollout of different versions of a windows service over time. for example I would like to deploy my software (windows service) in version numbered folders, e.g. c:\wss\v1.0 c:\wss\v1.1 etc however I dont want to have to reinstall the windows service each time but rather would like to be able to easily point the windows service manager to the new folder. Are there tools to get this done? NB: I have used Windows Junctions before (from sysinternals) however I am wondering if there is a nice GUI tool to do this.

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• Is there a way to see what is typed or websites visted when a spouse is using google chrome in incognito ?

  - by Ken

  My spouse and I have 2 laptops both running windows 7 and I have 1 desktop running vista. I have reason to believe she is cheating and I want to watch her internet usage, She is always using google chrome in incognito mode. I have tried a few keyloggers but they never seem to be able to get the keystrokes when she is on google. I dont know if there is a way I can network them so they go thru my desktop then to the internet. We are using Brighthouse cable internet. any ideas would be great thank you

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• switch between two cursors based on parameter passed into stored procedure

  - by db83

  Hi, I have two cursors in my procedure that only differ on the table name that they join to. The cursor that is used is determined by a parameter passed into the procedure if (param = 'A') then DECLARE CURSOR myCursor IS SELECT x,y,z FROM table1 a, table2 b BEGIN FOR aRecord in myCursor LOOP proc2(aRecord.x, aRecord.y, aRecord.z); END LOOP; COMMIT; END; elsif (param = 'B') then DECLARE CURSOR myCursor IS SELECT x,y,z FROM table1 a, table3 b -- different table BEGIN FOR aRecord in myCursor LOOP proc2(aRecord.x, aRecord.y, aRecord.z); END LOOP; COMMIT; END; end if I don't want to repeat the code for the sake of one different table. Any suggestions on how to improve this? Thanks in advance

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