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• How to fix high Load_Cycle_Count laptop drive (TOSHIBA MK6006GAH in Vaio TX1XP)?

  - by Sam Brightman

  Hoping someone knows exactly what's going on here. It seems this drive has some combination of aggressive power saving settings and Ubuntu defaults that has massively increased the Load_Cycle_Count for the drive: https://wiki.ubuntu.com/DanielHahler/Bug59695 So the drive is now so slow that it cannot boot because it takes long enough to access the data that the kernel will not recognise it properly. I'm not worried about the data on the drive, but would really like to keep the laptop functioning. There is some indication that this is possible because the figure is still low 200,000s and most drives supposedly go to 600,000. Additionally, SMART tests pass and consider the drive healthy and without errors. But the really surprising thing was when I ran mhdd... Every single read came up red (slow) until I pressed 'R' for reset drive. I noticed the next read was normal speed, so held down 'R'. Magically the drive read perfectly for as long as I held the key BUT resumed slow (and noisy) seeking/reading after releasing. I don't think the source code to mhdd is available, so I'm not exactly sure what this means (besides, I don't know enough low-level HDD stuff either). It seems like the drive should be able to work, but is stuck trying to power save or something. There are no BIOS options on the laptop. Does anyone know how I can stop the drive from doing extremely slow/noisy operations like this? Or is constantly resetting the drive also damanging, and only causing it to work well by luck (i.e. not a suggestion that it's fixable)?

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• OpenLDAP 2.4.23 - Debian 6.0 - Import schema - Insufficient access (50)

  - by Yosifov

  Good day to everybody. I'm trying to add a new schema inside OpenLDAP. But getting an error: ldap_add: Insufficient access (50) root@ldap:/# ldapadd -c -x -D cn=admin,dc=domain,dc=com -W -f /tmp/test.d/cn\=config/cn\=schema/cn\=\{5\}microsoft.ldif root@ldap:/# cat /tmp/test.d/cn\=config/cn\=schema/cn\=\{5\}microsoft.ldif dn: cn=microsoft,cn=schema,cn=config objectClass: olcSchemaConfig cn: microsoft olcAttributeTypes: {0}( 1.2.840.113556.1.4.302 NAME 'sAMAccountType' DESC 'Fss ssully qualified name of distinguished Java class or interface' SYNTAX 1.3.6. 1.4.1.1466.115.121.1.27 SINGLE-VALUE ) olcAttributeTypes: {1}( 1.2.840.113556.1.4.146 NAME 'objectSid' DESC 'Fssssull y qualified name of distinguished Java class or interfaced' SYNTAX 1.3.6.1.4. 1.1466.115.121.1.40 SINGLE-VALUE ) olcAttributeTypes: {2}( 1.2.840.113556.1.4.221 NAME 'sAMAccountName' DESC 'Fds sssully qualified name of distinguished Java class or interfaced' SYNTAX 1.3. 6.1.4.1.1466.115.121.1.15 SINGLE-VALUE ) olcAttributeTypes: {3}( 1.2.840.113556.1.4.1412 NAME 'primaryGroupToken' SYNTA X 1.3.6.1.4.1.1466.115.121.1.27 SINGLE-VALUE ) olcAttributeTypes: {4}( 1.2.840.113556.1.2.102 NAME 'memberOf' SYNTAX 1.3.6.1. 4.1.1466.115.121.1.12 SINGLE-VALUE ) olcAttributeTypes: {5}( 1.2.840.113556.1.4.98 NAME 'primaryGroupID' SYNTAX 1.3 .6.1.4.1.1466.115.121.1.27 SINGLE-VALUE ) olcObjectClasses: {0}( 1.2.840.113556.1.5.6 NAME 'securityPrincipal' DESC 'Cso ntainer for a Java object' SUP top AUXILIARY MUST ( objectSid $ sAMAccountNam e ) MAY ( primaryGroupToken $ memberOf $ primaryGroupID ) ) I also tried to add the schema by phpldapadmin, but gain the same error. I'm using the admin user which is specified by default from the begging of the slpad installation. How may I add permissions to this user ? Best wishes

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• Vim autocommand on BufDelete prevents opening help window

  - by Kyle Strand

  I have the autocommand described here in my .vimrc: http://superuser.com/a/669463/199803 EDIT: Copied into body of question for convenience: function CountListedBuffers() let cnt = 0 for nr in range(1,bufnr("$")) if buflisted(nr) && ! empty(bufname(nr)) let cnt += 1 endif endfor return cnt endfunction function QuitIfLastBuffer() if CountListedBuffers() == 1 :q endif endfunction autocmd BufDelete * :call QuitIfLastBuffer() Bizarrely, though, it seems that if I have exactly one listed buffer, and I try to use the :help command, the help window fails to open (or perhaps opens and is immediately closed). If I comment out that autocommand line in my .vimrc, this behavior no longer occurs. Why is this happening, and how can I fix it? Why would :h even trigger the BufDelete event? EDIT: setting verbosity to level 12, I can see that the BufDelete event is indeed occurring. Here's the portion of the output that looks relevant to me: Executing BufAdd Auto commands for "*" autocommand call <SID>BMAdd() calling function <SNR>6_BMAdd calling function <SNR>6_BMAdd..<SNR>6_BMFilename calling function <SNR>6_BMAdd..<SNR>6_BMFilename..<SNR>6_BMMunge calling function <SNR>6_BMAdd..<SNR>6_BMFilename..<SNR>6_BMMunge..<SNR>6_BMTruncName function <SNR>6_BMAdd..<SNR>6_BMFilename..<SNR>6_BMMunge..<SNR>6_BMTruncName returning '/usr/local/share/vim/vim74/doc' continuing in function <SNR>6_BMAdd..<SNR>6_BMFilename..<SNR>6_BMMunge function <SNR>6_BMAdd..<SNR>6_BMFilename..<SNR>6_BMMunge returning 'help\.txt\ (4)\^I/usr/local/share/vim/vim74/doc' continuing in function <SNR>6_BMAdd..<SNR>6_BMFilename calling function <SNR>6_BMAdd..<SNR>6_BMFilename..<SNR>6_BMHash function <SNR>6_BMAdd..<SNR>6_BMFilename..<SNR>6_BMHash returning #340582286 continuing in function <SNR>6_BMAdd..<SNR>6_BMFilename function <SNR>6_BMAdd..<SNR>6_BMFilename returning #0 continuing in function <SNR>6_BMAdd function <SNR>6_BMAdd returning #0 continuing in BufAdd Auto commands for "*" Executing BufDelete Auto commands for "*" autocommand :call QuitIfLastBuffer()

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• php-cgi.exe Taking out server, multiple running

  - by Alex

  I have been using ZendServer CE for over a year and have never had a problem. Recently, about a week or two ago I have found my server to be acting up and even causing RDP to be un-connectable. After some looking around I have 20, 25, 30+ php-cgi.exe running. With my IIS7 service starting with Windows once my server started all these php-cgi.exe would start running (even though the limit is 10) and I could not even connect to it. After disabling the Web Server as startup which stops php-cgi.exe from running the server runs flawless, like it always has. As soon as I run the web server all these odd issues start. I have a post over at Zend http://forums.zend.com/viewtopic.php?f=44&t=41043&p=95133 where I was told to update my Zend install. After doing so this issue has not gone away. Even running 1 php-cgi.exe (somehow 2 start anyway) the server begins to go silly. The first issue I find myself with running php-cgi.exe is that Windows Services, weather be stock or using FireDaemon begin to lag, slow start, crash, etc. If anyone can help me with this I would GREATLY appreciate it. At this time I am forced to look for a alternative to running PHP other than cgi as it simply takes out the whole box. On another note, I run this same version of Zend on a similar server with no issues. Starting to think its a IIS issue. (UPDATE) Installed newest version of PHP, separate from Zend, same issue. Server Specs: Intel Xeon Quad w HT Nehlam Based 24GB DDR3 1333 2x1TB Raid Mirror OS 2x1TB Raid Mirror (Other) 4x2TB Raid 5 (Storage) Server 2008 R2

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• How to make Windows command prompt treat single quote as though it is a double quote?

  - by mark

  My scenario is simple - I am copying script samples from the Mercurial online book (at http://hGBook.red-bean.com) and pasting them in a Windows command prompt. The problem is that the samples in the book use single quoted strings. When a single quoted string is passed on the Windows command prompt, the latter does not recognize that everything between the single quotes belongs to one string. For example, the following command: hg commit -m 'Initial commit' cannot be pasted as is in a command prompt, because the latter treats 'Initial commit' as two strings - 'Initial and commit'. I have to edit the command after paste and it is annoying. Is it possible to instruct the Windows command prompt to treat single quotes similarly to the double one? EDIT Following the reply by JdeBP I have done a little research. Here is the summary: Mercurial entry point looks like so (it is a python program): def run(): "run the command in sys.argv" sys.exit(dispatch(request(sys.argv[1:]))) So, I have created a tiny python program to mimic the command line processing used by mercurial: import sys print sys.argv[1:] Here is the Unix console log: [hg@Quake ~]$ python 1.py "1 2 3" ['1 2 3'] [hg@Quake ~]$ python 1.py '1 2 3' ['1 2 3'] [hg@Quake ~]$ python 1.py 1 2 3 ['1', '2', '3'] [hg@Quake ~]$ And here is the respective Windows console log: C:\Workpython 1.py "1 2 3" ['1 2 3'] C:\Workpython 1.py '1 2 3' ["'1", '2', "3'"] C:\Workpython 1.py 1 2 3 ['1', '2', '3'] C:\Work One can clearly see that Windows does not treat single quotes as double quotes. And this is the essence of my question.

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• 403 Forbiden on Apache (CentOS) Server

  - by pouya

  These are my VM setup: HOST: windows 7 ultimate 32bit GUEST: CentOs 6.3 i386 Virtualization soft: Oracle virtualBox 4.1.22 Networking: NAT -> (PORT FORWARD: HOST:8080 => GUEST:80) Shared Folder: centos all the project files goes into shared folder and for each project file a virtualhost conf file is created in /etc/httpd/conf.d/ like /etc/httpd/conf.d/$domain I wasn't able to see anything in my browser before disabling both windows firewall and iptables in centos after that if i type for example: http://www.$domain:8080/ all i see is: Forbidden You don't have permission to access / on this server. Apache/2.2.15 (CentOS) Server at www.$domain.com Port 8080 A sample Virtual Host conf file: <VirtualHost *:80> #General DocumentRoot /media/sf_centos/path/to/public_html ServerAdmin webmaster@$domain ServerName www.$domain ServerAlias $domain *.$domain #Logging ErrorLog /var/log/httpd/$domain-error.log CustomLog /var/log/httpd/$domain-access.log combined #mod rewrite RewriteEngine On RewriteLog /var/log/httpd/$domain-rewrite.log RewriteLogLevel 0 </VirtualHost> centos shared folder is availabe to guest at /media/sf_centos These are file permissons for sf_centos: drwxrwx--- root vboxsf vboxsf group includes: apache and root So these are my questions: 1- How to solve Forbidden Problem? 2- How to setup both host and guest firewalls? 3- How can i improve this developement environment to simulate production environment as much as possible specially security improvements?

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• Change the background color of selected text in Google Docs to increase readability [migrated]

  - by gene_wood

  How can I override or change the background color of text selected in Google Docs? It is difficult for me to see the difference and I would like to increase the contrast or difference. After Google restyled Google Docs last year (or earlier this year), I've been unable to see selected text. It's possible this is a visual deficiency with my eyes. In Google Docs, under both Google Chrome (17.0.963.83 (Official Build 127885) m) and Firefox (11.0), when I select text inside a Google Doc, the selected text has a background of color #d6e0f5. Compare this to the default browser background color of #2f65c0. (I determined the color of the selected text background by taking a screenshot and using the color picker tool in Photoshop). I've tested this using a brand new Firefox profile as well as google chrome profile. Here's a section of a screenshot showing the selected text : I've tried using a userscript to override the CSS to go back to the default text selection color using the "Stylish" plugin with this css : ::selection { background:#2f65c0; color:#ffffff; } ::-moz-selection { background:#2f65c0; color:#ffffff; } ::-webkit-selection { background:#2f65c0; color:#ffffff; } This code works on other sites, but I'm unable to get it to work on Google Docs. (I tested on other sites but applying the userscript to a different domain and using bright yellow instead of the default dark blue #2f65c0.) When you use Google Docs, do you have the same color background for selected text or something different? (To test this, browse to docs.google.com , create a document, type text into the document, select the text with the mouse by dragging over it, take a screenshot, load the screenshot up in an image editor and determine the background color of the selected text.) This color differential (between light blue #d6e0f5 and white #fffff) may be easy to see for others and the problem lies with my eyes.

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• Terminal Server CPU usage at 100%

  - by Light1c3

  I'm running a terminal server with around 50-60 users,and every so often the server will go from 40% usage to 100%. I took a closer look an it seems every time this happens, a different user or two seem to be caught in a loop and end up using < 30% where the rest of the users only use a maximum of 5%. The company behind the software we use clame it's due to the servers inadequate hardware (It's a VM system running on a dual - quad core setup) which to me sounds like BS! I'm fairly new to this level of IT so if I misspoke I apologize. I have no way to prove it but I believe adding more raw hardware power wont do me any good as this to me seems like a bug in their software, and it will suck up as much ( or little) CPU as it's given. The VM in question has 4 vCPU cores and 12 GB RAM available, and is running Windows Server 2008, 64-bit Thanks in advance for your help! Note: I have the same question posted on SO, but was pointed in this direction so just in case, here is a link to the post http://stackoverflow.com/questions/17276602/termserver-cpu-at-100

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• How to use LVM on Rackspace Cloud

  - by batrick

  Dear all, I am trying to set up a simple but effective solution to make a backup of my rackspace cloud servers. These servers each run subversion, trac, and some database-backed custom php applications. My idea is to set up a LVM and mount a volume under, say, /srv. In this volume, I keep the data from all applications. Instead of caring about how to back-up each app in a different way (svn hotcopy, trac-admin hotcopy, huge mess for mysql), I simply take an LVM snapshot and back this one up cloud files using the excellent cloudcity script (http://github.com/jspringman/cloudcity/blob/master/cloudcity). The advantage of this solution is that it is quick and easy, and LVM allows to make decent backups. As more apps are added, it should not be required to change the backup script much. The downside, and main point of my question here, is that I am not sure how to get LVM working on Rackspace cloud, because there is only one root volume and no service like Amazon's EBS. I was thinking it may be possible to create a large empty file and use this as a "physical volume". Has anybody done anything like this before? Or do you know why it can never work? It would be great to hear from you. Thanks, batrick

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• Reverse web proxy with time constraints

  - by user2893458

  I have a web application which produces several unique URLs of the type http://service.company.com/service.html?type=aaaa&key=jfiZm6u6cW where the last part is a randomly generated key. Each such URL provides access to an instance of the service provided. I am looking for a way to restrict access to those URLs based on time constraints, as an example URL#1 should be available between 8:00AM and 10:00AM on May 30, URL#2 should be available between 10:30AM and 12:00PM on May 31, and so on. I already have a resource scheduling application based on Drupal and would like to find a way to include those URLs as scheduled resources. The web application is deployed on Apache Tomcat, so I don't have the knowledge or the resources to alter it, therefore I thought that I could put some sort of reverse proxy in front of the web app that could implement the time constraint feature. In my thoughts the reverse proxy would allow or disallow access to each URL based on the rules that my scheduling application would provide. There may be other ways to deliver such a solution, but I can't think of anything better, so the question is: is there a reverse web proxy architecture that could allow access to the destination URLs based on time and date rules? Any other ideas are more than welcome.

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• Linux as a gateway (no NAT)

  - by Hugo

  I'm trying to configure a linux server as a gateway/router, but I can't get it to work, and all information I've managed to find is NAT-related. I have a public IP block for the gateway and devices behind it, so I want the gateway to simply route packets to the internet - again: no NATing! I've managed to get the gateway to access the internet successfully (that was just a matter of configuring the IP and GW), and the computers behind it can communicate with it. [EDIT: more info] This is actually an IPv6 block (2800:40:403::0/48) (but I've found that most utilities and instructions can be easily adapted from IPv4 to IPv6 with little hastle). The server has too ports: wan: 2800:40:403::1/48 lan: 2800:40:403::3/48 One of the computers behind it is connected to it via a switch; 2800:40:403::7/48 The wan interface on the server can ping6 www.google.com without issues. The lan interface on the server and the client can mutually ping each other without issues (as well as SSH, etc). I've tried setting the server as a default gateway for the client, with no luck: client # route -A inet6 add default gw 2800:40:403::3 dev eth1 server # cat /proc/sys/net/ipv6/conf/all/forwarding 1 I don't want any filtering/firewalling/etc, just plain routing. Thanks.

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• What is the bash syntax to create a new directory in the directory above?

  - by mozerella

  I aim to make a script for mogrify. The mogrify command will resize images in a directory and put the resized images into a directory on the same directory level, with the same name as the work directory, but with a suffix (_a). The new directory will be moved to another collection later on. Something like this, #!/bin/bash mkdir ../n_a for file in *{.JPG|.jpg}; do mogrify -path ../n_a -resize 1200x1200 -quality 96;done I'm guessing ../ denotes the parent dir when working in a child directory, but I need help here. Edit: "n" needs to be replaced with the syntax for the working directory name. Sorry there was a typo as well third script line, should have read n not x Edit2: This script does exactly what I need and it's silent. #!/bin/bash DEST="../${PWD##*/}_a" mkdir -p $DEST mogrify -path $DEST -resize 1200x1200 -quality 96 *.jpg *.JPG thanks to vgoff for the correct PWD syntax and cesareriva http://www.cesareriva.com/archives/722 for showing me the DEST function. Something else: ${PWD##*/}_a is not caring for spaces in the directory name and the script fails. An empty dir is created in the same dir as the images. Found it out now, it needs quotations on the $DEST too, presumably to help mkdir create the dir with a space in the name, and mogrify to write the files to the right place, like this #!/bin/bash DEST="../${PWD##*/}_a" mkdir -p "$DEST" mogrify -path "$DEST" -resize 1200x1200 -quality 96 *.jpg *.JPG

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• Windows Server 2008 IIS7 - page requests randomly hang or timeout

  - by seb835

  I've just installed a fresh copy of Windows Server 2008 x64 with IIS7 and PHP (fast CGI). However, I'm noticing that after moving my web site from a similarly specified machine to this one, I'm getting issues. The issue seems to be that randomly, as I'm clicking through the web pages being served, the browser will suddenly hang saying "waiting for mysite.com...". Sometimes the page will then timeout, or finally resolve after 20 to 30 seconds, but maybe missing the CSS style sheet. Very strange, as this is the only website installed on this new server, and only myself using/testing it. Server is installed in the same data centre below the old server. Has anyone else had a similar problem? I tried increasing the max workers pool to 10 (from 1), but this has no effect. Seems to happen most frequently after 1 or 2 minutes of inactivity on the website, then trying to load/refresh a web page. Many thank for any info and help. Kind Regards, Seb

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• Cisco ASA 5505 - InterVLAN NAT Exemptions Implementation not working

  - by Brandon Bearden

  Short version is we cannot communicate between our subnets. We have a Cisco ASA 5505 we are using for our network router. We have a Netgear L3 switch behind that with 10 vlans. Each VLAN is on its own subnet. (10.0.10.x/24, 10.0.11.x/24, etc) So ASA Switch Hosts We have PAT for each subnet to our outside interface. Each subnet NATs out properly. I have NAT exemption enabled for 2 of the subnets (eventually I will need all, but am just testing at the moment). Config is here: http://pastebin.com/pDsG7hsh I have tried multiple ways for the NAT exemption to allow all traffic from our inside VLANS. At this point in time I am trying to get "Engineering" to communicate with all hosts on "AuthUser". I can ping some hosts, but not as many as if I am directly on the interface. I can reach a port 80 service, but not 443. I cannot access anything via hostname or NetBIOS. What am I missing to allow higher security level interfaces to fully communicate with lower security level interfaces? Thx!

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• Graphics artifacts/distortion with Win7 and nVidia

  - by Gepard

  Problem I encounter is rather hard to describe, so I provide a screenshot: http://dl.dropbox.com/u/1732760/video-distortion.png As you can see there are some horizontal stripes in random colors. These stripes appear sometimes in all windowed apps, games and on the desktop too. They tend to stay in place until I refresh window (or force it to to redraw by for example minimizing and maximizing again). They also tend to appear in the same place and shape multiple times, even if they disappear, it's very likely they will be again in the same place after a while. These artifacts do not blink or change if computer is idling. If I don't touch anything, do not use mouse, they will stay in place forever (unless some app redraws its window on its own). I first encountered this problem some weeks ago. Back then I thought it might be cooling problem, so I took out the graphics card, removed dust from the radiator and fan and put it into PC back. I also ran some stress test using Furmark (peak tempearature was ~65C) to see if the problem becomes more intense if the card gets hotter, but suprisingly no artifacts whatsoever appear during the stress test. Graphic card is Galaxy GeForce 7300 GT with DDR3 memory, was never overclocked. Drivers are the latest, from Nvidia site. OS is Windows 7 64-bit, updated. AMD64 3000+, 2GB RAM. I'm running a dual monitor setup with 2 19'' Samsung LCDs and problem is on both, so I assume it's not a monitor or cable issue.

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• Single application through OpenVPN tunnel (Debian Lenny)

  - by user14124

  I'm using Debian Lenny and I want to tunnel rtorrent only through a OpenVPN tunnel. I have a tunnel running, the config file looks like this: client dev tun proto udp remote openvpn.xxx.com 1194 resolv-retry infinite nobind persist-key persist-tun ca /etc/openvpn/xxx/keys/ca.crt cert /etc/openvpn/xxx/keys/client.crt key /etc/openvpn/xxx/keys/client.key tls-auth /etc/openvpn/xxx/keys/tls.key 1 ns-cert-type server comp-lzo verb 3 auth-user-pass script-security 3 reneg-sec 0 My idea is that I could run a sockd proxy internally that redirects traffic to the openvpn tunnel. I could use the *nix "proxifier" application "tsocks" to make it possible for rtorrent to connect through that proxy (as rtorrent doesn't support proxies). I have trouble configuring sockd as my IP inside the VPN changes every time I connect. This is a config file someone said would help: http://ircpimps.org/sockd.conf As my IP changes at each connect I don't know what to put in that config file. I have no control over the host side config file. Any help wanted. Any other method is very welcome.

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• Cisco AnyConnect VPN client - prevent connecting as work network

  - by Opmet

  From Windows 7 I'm using "Cisco AnyConnect Secure Mobility Client 3.0" to connect to our corporate network. Every time I establish the VPN connection Windows will set the type as "work network". I don't want this. So I go to "network and sharing center" and manually / interactively change it to "public network". But I have to repeat it for every new VPN connection. Is there any way to make Windows remember / persist this configuration? Can it be configured in the VPN client? Do our IT admins need to change something at server end? Motivation: A "work network" per default uses different firewall settings that allows for stuff like "network discovery" and "file shares". But I just need "remote desktop" (mstsc). Additional info: Our IT admins claimed this would be Windows default behaviour and there was nothing we could do about it: Windows would always initiate a VPN connection as "work network". Based on this statement I assume this is a "general" issue and went ahead posting here (at superuser.com).

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• Portforwarding Combine Several Ports

  - by kiraitachi

  Hi I got a Raspberry Pi at A.A.A.B in my local network and I have set up a DMZ on my router so that any incoming traffic that comes to my router gets redirected to my raspberry pi wich I can connect via NO-IP adress. The problem is that I want to set up portforwarding since i got several services running on my Pi like SSH, torrent webgui, webalbum, etc. I had this already done before long time ago, but I forgot a bit the syntax and cant get to set it up. Router Help says: The Application allows you to do port forwarding, but only have the ports open when data flowing out of the trigger ports. When a program sends data out on outgoing ports called trigger ports, the device then allows incoming data on the open ports specified in your port triggering configuration. 1.Trigger Port Start Trigger Port Start Specify the start port on the device that would trigger the device to open ports for incoming data. 2.Trigger Port End Specify the end port on the device that would trigger the device to open ports for incoming data. You can enter a port number the same as the trigger port start or enter a larger port number to specify a port range. 3.Trigger Traffic Protocol Type Select the trigger traffic type. Open Port Specify all the ports to be opened. It's content could be: A single port only. A port range only. Start open port number and end port number should be separated by "-" . Combined several single port and several port ranges. Each single port or port range should be separated by "," . Open Traffic Protocol Type Select the open traffic type. This are the fields: http://es.tinypic.com/view.php?pic=n5lv1k&s=8 I think this is the syntax 1-7999,8001-9090,9092-65535. But each time I want to add it gives me an error. Any ideas?

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• Made a .dmg for a project; user can't open it - "no mountable file systems"

  - by dragonridingsorceress

  Hello, We don't know a great deal about Macs. We had to make an installer, and were told to try a .dmg So we put together version 1, and it seemed to work. We had one application file, which had our icon, and one folder. The user was instructed to drag these into the Applications folder, of which there was the Mac version of a shortcut in the dmg. Then we were told we needed to update files, and assured that we could do so via drag-and-drop. So we did; we dragged them into the folder in the dmg. We tested it (on the computer we were using to edit the dmg) and it seemed to work. So we burnt it onto a disk (along with a windows installer that actually works!). I've just gotten an email from the recipient. She's got a Mac laptop. She inserted the disk, doubleclicked on it, doubleclicked on the .dmg, and got a Warning: no mountable file systems. Screenshot: http://www.flickr.com/photos/97292258@N00/5101670174/ I have the dmg (not on a disk) and am able to open it with no difficulty. How can we get it to work for our recipient?

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• How to track things that SHOULD happen, but might not have

  - by Kamiel Wanrooij

  I am running into a couple of issues with some applications we've deployed and maintain. I have the feeling we have approached this with some anti-patterns up to now, but I would like to see how to make this more flexible and stable. In one situation, we have a server at a client which pushes data to us to parse every night (yes, Windows Task Scheduler). This is highly unstable however, so once every month this doesn't happen because of reasons out of our control. This heavily impacts our business since we run with stale data in that situation. In another scenario we have a lot of background job processes that should be running. We already keep them up using bluepill ( http://www.github.com/arya/bluepill ) but obviously restarts happen, both automatically and manually, and people forget things or systems mess up. What I would like to track is events that should occur or should be available. Like the existence of a process, the execution of a program, or the creation/age of a file, and track it when they don't happen or exist. We develop most things in Ruby on Rails, use NewRelic, Bluepill and Munin, and run on Ubuntu. I've been toying around with counting ps aux | grep processname | wc -l in Munin scripts, or capturing the age of a file and raising alerts over 24-26 hours, stuff like that. Is there better tooling to track things that should happen, and raise alerts if they don't? P.S. I know some things are suboptimal, like manually having to define bluepill for applications and then forgetting to do so. The same goes for the push based approach of the first application, a dedicated daemon that manages that on the client side that we control and can track its connection to us might be a much better solution.

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• hi, beginner issue with socat [closed]

  - by ams

  the main question is how to begin sending request to server with some data(send request with number) and get data from server?? and second question is how can i solve this simple question (author said) ? In this part, you should write a simple Shell script which receives URL of a website by sending your student number to a server and after creating and sending HTTP request for this URL, receives the desired content. Finally the content should be saved in an HTML file. Steps 1. Connect to port 4000 of the server and send the massage which includes your student number (e.g. 89207704) to the server. Receive the URL in the form of http://www.example.com. Create the HTTP request and send it to the website's server. Receive the content of the URL from the website. Save the content in the HTML file. what i can do? how i begin? thank u all the topology that exercise is speaking about is here Topology is here Is there any easy way to do this?

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• MySQL : table organisation for very large sets with high update frequency

  - by Remiz

  I'm facing a dilemma in the choice of my MySQL schema application. So before I start here is a picture extremely simplified of my database : Schema here : http://i43.tinypic.com/2wp5lxz.png In one sentence : for each customer, the application harvest text data and attached tags to each data collected. As approximation of the usage of each table, here is what I expect : customer : ~5000, shouldn't grow fast data : 5 millions per customer, could double or triple for big customers. tag : ~1000, quite fixed size data_tag : hundred of millions per customer easily. Each data can be tagged a lot. The harvesting process is permanent, that means that around every 15 minutes new data come and are tagged, that require a very constant index refreshing. A lot of my queries are a SELECT COUNT of DATA between specific DATES and tagged with a specific TAG on a specific CUSTOMER (very rarely it will involve several customers). Here is the situation, you can imagine with this kind of volume of data I'm facing a challenge in term of data organization and indexing. Again, it's a very minimalistic and simplified version of my structure. My question is, is it better: to stick with this model and to manage crazy index optimization ? (which involves potentially having billions of rows in the data_tag table) change the schema and use one data table and one data_tag table per customer ? (which involves having 5000 tables on my database) I'm running all of this on a MySQL 5.0 dedicated server (quad-core, 8Go of ram) replicated. I only use InnoDB, I also have another server that run Sphinx. So knowing all of this, I can't wait to hear your opinion about this. Thanks.

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• Understanding where an amazon ec2 instance run?

  - by kenzo450D

  I am currently using the aws api from my local desktop. I can successfully take backups of my amazon volumes, and even create an ami from it. Now when i wanted to run the instance to be built from this ami, where does the instance run? In their Elastic Cloud or the computer from which the command was issued. Suppose I want to create the new instance in a new region? (locations as defined in ec2-describe-regions) How would I do that? It seems i have a bad knowledge about how the relation between amazon volumes and instances? Please explain it. I am only allowed to use the CLI tools to do all of my work. I made a new snapshot of the existing instance, made an ami using ec2-register, made a keypair, and then followed these steps, http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/launching-an-instance.html#launching-an-instance-cli but i got an error as this Client.InvalidParameterValue: The requested instance type's architecture (i386) does not match the architecture in the manifest for aki-fc37bacc (x86_64) my local computer is 32bit. But I do not want to load instance on the local computer but on amazon servers?

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• Relative path incorrect in the view layer when hosting a rails3 app in a subdirectory using passenger and apache

  - by Saifis

  I want to host multiple Rails apps on a multiple server using sub-directories. And have encountered some relative path problems. I have made a symbolic link to the app's public directory and placed it in the /var/www/html directory, var/www/html/ /test_app (symbolic link to the public folder of test_app) and set apache as so LoadModule passenger_module /usr/local/lib/ruby/gems/1.9.1/gems/passenger-3.0.12/ext/apache2/mod_passenger.so PassengerRoot /usr/local/lib/ruby/gems/1.9.1/gems/passenger-3.0.12 PassengerRuby /usr/local/bin/ruby <VirtualHost *:80> ServerName test.com DocumentRoot /var/www/html Options Indexes FollowSymLinks -MultiViews RailsBaseURI /test_app </Location> </VirtualHost> The links in the app itself works just fine, all the links acknowledge the test_app/ directory and work, however, when it comes to showing images in the public directory in the view, the relative path goes wrong. Say I have /system/files/1/aaa.png it goes looking for it in /var/www/html/system/files/1/aaa.png rather than /var/www/html/test_app/system/files/1/aaa.png As far as I understand this is an Apache setting problem than something to be done in Rails, if its possible I would prefer to have it contained in the conf file of apache rather than having to alter the code.

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• How best to handle end user notification in the event of system failure incl. email?

  - by BrianLy

  I've been asked to research ways of handling end user notifications when systems such as email are experiencing problems. Perhaps an example will make this a little clearer. We have a number of sites in different countries. Recently email was impacted at one of the sites, but it could have been a complete network outage. Information was provided by phone to local IT managers at the site but onward communication was slower than some would have liked. It seems like almost everyone at the site has a personal mobile phone which could receive text messages, and perhaps access a remote website with postings on the situation. However managing and supporting a system to text people on these relatively infrequent occasions would be very costly to do internally. What are other people doing to handle situations like this? Some things I've thought of include: Database of phone numbers to text. Seems costly and not very easy to maintain for an already stretched IT group. Is there an external service that would let you do this policies? Send voicemail message to all phones on site. Maintain an external website. This would not work in all situations (network failure), and there is a limit on the amount of info that can be posted externally. A site outage could be sensitive information in some situations. How could the site be password protected? Maybe OpenId/Facebook connect would work. Use a site like Yammer.com which is publicly accessible but only by people with a company email address. Anyone using this for IT outage notifications? To me it looks like there is no clear answer, and that there are solutions for some subsets of users. To be comprehensive a number of solutions would need to be combined. Any additional thoughts or recommendations? What worked or didn't work for your organization?

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