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• weird resolving of path to command

  - by Eldamir

  I have the terminal editor 'nano' installed in two places on my mac /usr/bin/nano /opt/local/bin/nano The installations are of different versions. the one in /usr does not support my configuration in ~/.nanorc and the one in /opt does. when i open a file with the command 'nano file', errors are displayed, indicating that the one in /usr was used, however, if i run 'which nano'; the one in /opt shows up. Isn't 'which' meant to search the path for the default? And why wouldn't a call to 'nano' resolve to the same path? EDIT: I made a work-around by adding the following line to ~/.profile alias nano='/opt/local/bin/nano'

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• USB ports not recognizing devices (vista)

  - by frank

  I'm trying to fix a problem on a Vista machine where all the USB ports seem to have power but they don't recognize devices plugged into them. It seemed to start after I plugged my mp3 player (sansa clip) into it and disconnect it. So it sounds similar to this article http://support.microsoft.com/kb/817900 but that was for XP. And I did try all the fixes (including the registry entry) but they did not help. It also sounds similar to this SU question 50110 but I don't think it is the mother board. I have see other places that suggest reinstalling the OS...but that seems like a last resort type of thing. I have also seen a suggestion of doing a system restore but not sure if that will help. Any ideas of what I can try?

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• Dummy/default page for apache

  - by Ency

  I'm trying to set up default page for my apache2, for following cases: User is accessing http://IP_Address instead of hostname Requested protocol (HTTP/HTTPS) is not available (eg. only http*s*://domain.com exists) Currently I've got something like that <VirtualHost eserver:80> ServerAdmin webmaster@localhost DocumentRoot /var/www/local/ <Directory /> Options FollowSymLinks AllowOverride None </Directory> </VirtualHost> I think, it works well, i'm trying to do similar thing for HTTPS, but it does not work. <VirtualHost eserver:443> SSLCertificateKeyFile /etc/apache2/ssl/dummy.key SSLCertificateFile /etc/apache2/ssl/dummy.crt SSLProtocol all SSLCipherSuite HIGH:MEDIUM ErrorLog /var/log/apache2/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn ServerSignature Off </VirtualHost> My default is places in sites-enabled as a first one 000-default I do not care about not certificate validity during accessing default page, my goal is not show different HTTPS page if user one of points is applied

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• Cabling: What to keep in stock?

  - by pehrs

  I have worked a few different places, each one with a different solution, so I would like to hear your suggestions and ideas. I am looking at a situation with multiple server-rooms. We have a mixture of copper (both ethernet and telephone), multi-mode fibre and single-mode fibre. We have all types of connectors: RJ-11, RJ-45, LC, SC, FC, SMA and several I probably forgot about. We have a lot of people working in the area, and keeping track of cables is turning into a full time job. So, here are a the questions: What types and lengths of cable do you keep in stock on site? Do you make your own or buy pre-made? Adapters? Dampeners? How do you manage cable inventory? How do you label the cables? Any other tricks to stop this from driving me crazy?

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• What is user/owner 24561?

  - by ralphthemagician

  So, I just installed the node.js package from nodejs.org and I was poking around to see what it installed. Over in /usr/local/bin I saw this owner 24561. I see it in a few other places too. What is this? What does it mean? Should it be root like everything else? lrwxr-xr-x 1 root wheel 66 Jun 23 13:02 mate -> /Applications/TextMate.app/Contents/SharedSupport/Support/bin/mate -rwxr-xr-x 1 24561 wheel 18865984 Jun 29 09:32 node -rwxr-xr-x 1 24561 wheel 355 Jun 29 09:32 node-waf lrwxr-xr-x 1 root wheel 38 Jul 3 12:15 npm -> ../lib/node_modules/npm/bin/npm-cli.js What was curious is that I couldn't find any other information about this user by Googling. Using OS X Lion 10.7.4 with Xcode installed if that makes any difference.

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• How can I find a laptop if it has a different name all over the world?

  - by Mike

  CONUNDRUM: A laptop review in the UK talks about how brilliant the "ASUS ABCDE 55" is, but in America, France, etc there is no such laptop name. In fact it's called "ASUS 12345 AB" - AAARRGH! QUESTION: Is there a way of finding out all the diverse names for the same laptop all over the world? Example: if Samsung create a R2D2500, then what is that spec laptop called in all the other countries (if they release it of course). Or if it's not released, what is their similar spec laptop called in the other countries? I understand that specs may be different, but if I read a review on my trusted UK website, but live in say Australia, I want to be able to find the name of the same laptop in Australia and then check out local places to buy it. So if anyone knows if there is a technique, specific website, or even how to use a company website to find out these annoying name changes I'd really appreciate it.

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• Using search and replace to remove line breaks in Open Office

  - by chrisfs

  Hi, I've imported a document into Open Office and it has a number of hard returns in wrong places. In MS Word, I could use the search and replace to simply get rid of them all easily, but Open Office's earch won't find them. I tried /n with the 'use regular expressions' box checked, but it seems that only looks for 'shift-enter' breaks and not ordinary hard returns. Is there another way to remove them all quickly, or do I have to go manually through the document and remove each one individually. This is a surprising oversight for Open Office.

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• How can I make sftp accounts that can only access their home directory?

  - by LonnieBest

  I'm using Ubuntu Server 9.10. I need to setup 6 accounts for users that will exclusively need sftp. When the user logs in, I need them to only have access to their home directory. I don't want them to be able to navigate to any other places in the file system. I need their ability to type commands to be limited to only the commands needed to view and transfer files back and forth to their home directory. Can anyone offer some guidance on setting thing up this way?

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• Database modularity with EBS volumes

  - by Eclyps19

  I would like to add modularity to my websites on EC2 instances by encapsulating the site files and the mysql files in their own EBS volumes. The end result that I'm going for is the ability to quickly mount a volume or two to different servers running the same AMI (for testing/development/emergency maintenance, etc), as well as maintain separate snapshots of each. I'm able to do this fairly easily with a single database by symlinking my mounted database EBS to the appropriate places (/var/lib/mysql, /etc/my.cnf, /var/log/mysqld.log), but I'm not sure if it would even be possible be possible to have multiple databases on different EBS volumes running concurrently. Example: /website1/www.website.com /database1/ /website2/www.otherwebsite.com /database2/ Could anybody shed some light on this for me? Is it possible? Is it a bad idea? Thanks.

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• Getting out of the Helpdesk. Getting into the system administration.

  - by eric.s

  Today I found out that the job which would have been a promotion for me went to an outside candidate. The position is for a systems admin on our LAN team. I have been working on the helpdesk here for almost two years with another two years experience working it prior. While we are the first tier support we also work in AD, monitor and update certain servers and set up and deploy Windows/Mac images for those we support. What I am looking for here is what can I do to better myself to inside/outside places to move up this ladder? I take what I can from my job - working on projects that I can learn from - but what projects should I be volunteering for? What can I do for myself outside to make me a more viable candidate for a systems admin?

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• Throughput = BS * IOPS?

  - by Marvin

  I've seen in many places that throughput = bs * iops should be true. For example writing at 128k block size to a SAS disk that can support 190 IOPS should give a throughput of ~23 MBps - 23.75(MBs) = 128(BS)*190(SAS-15 IOPS)/1024. Now when I tested it in a VM against a monster NetApp filer I got theses results: # dd if=/dev/zero of=/tmp/dd.out bs=4k count=2097152 8589934592 bytes (8.6 GB) copied, 61.5996 seconds, 139 MB/s To view the IO rate of the VM I used iostat and esxtop, and they both showed around 250 IOPS. So to my understanding the throughput was supposed to be ~1000k: 1000(KBs) = 4(BS)*250(IOPS). dd of 8GB is twice the size of RAM of course, so no page caching here. What am I missing? Thanks!

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• Clicking hyperlinks in Email messages becomes painfully slow

  - by Joel Spolsky

  Running Windows 7 (RC, 64 bit). Suddenly, today, after months without a problem, clicking on links has become extremely slow. I've noticed this in two places. (1) clicking hyperlinks in Outlook email messages, which launches Firefox, takes around a minute. Launching Firefox by itself is instantaneous - I have an SSD drive and a very fast CPU. (2) opening Word documents attached to Outlook email messages also takes a surprisingly long time. The only thing these two might have in common is that they use the DDE mechanism, if I'm not mistaken, to send a DDE open command to the application. Under Windows XP this problem could sometimes be fixed by unchecking the "Use DDE" checkbox in the file type mapping, however, I can't find any equivalent under Windows 7. See here for someone else having what I believe is the same problem. See here for more evidence that it's DDE being super-super-slow.

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• Trying to set up OpenVPN server on a vps

  - by Austin

  I'm trying to set up an OpenVPN server on my VPS for myself when I'm in public places, using this tutorial, http://tipupdate.com/how-to-install-openvpn-on-ubuntu-vps/ However whenever I try to start the server, it gives me this, root@vps:~# /etc/init.d/openvpn start * Starting virtual private network daemon(s)... * Autostarting VPN 'server' [fail] The log contains this Tue Dec 11 10:53:32 2012 Diffie-Hellman initialized with 1024 bit key Tue Dec 11 10:53:32 2012 /usr/bin/openssl-vulnkey -q -b 1024 -m <modulus omitted> Tue Dec 11 10:53:33 2012 TLS-Auth MTU parms [ L:1542 D:138 EF:38 EB:0 ET:0 EL:0 ] Tue Dec 11 10:53:33 2012 ROUTE: default_gateway=UNDEF Tue Dec 11 10:53:33 2012 Note: Cannot open TUN/TAP dev /dev/net/tun: No such file or directory (errno=2) Tue Dec 11 10:53:33 2012 Note: Attempting fallback to kernel 2.2 TUN/TAP interface Tue Dec 11 10:53:33 2012 Cannot allocate TUN/TAP dev dynamically Tue Dec 11 10:53:33 2012 Exiting So obviously it's something to do with the tun, but I don't understand how to fix it. Thanks!

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• How can I install a headless JDK on an Ubuntu Jaunty server?

  - by Hanno Fietz

  I recently set up a build server that requires a JDK to run (for example, to compile the Java sources). The OpenJDK package in Ubuntu pulls in the OpenJDK JRE as a dependency which, in turn, depends on a large number of packages that are only relevant for graphical environments. For the standard JRE, there's a headless version of the package, but for the JDK, no. This issue has been discussed in various places before, and one solution that I found and used was this: $ apt-get --no-install-recommends -d install openjdk-6-jdk $ dpkg -i --ignore-depends=openjdk-6-jre /path/to/just-downloaded.deb While this worked, it now leaves my system with a broken dependency tree and apt-get refuses further installs untill I run apt-get -f. Is there a better solution to this?

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• how to change port number of Apache server in windows OS

  - by jesop

  I have installed xampp control panel and Apache 2.2 on windows XP when I type http://localhost/ gives me page which says It Works! Now, I want to change the port number 80 to some other number How to change it ? in how many files does it needs to be changed ? dose it require to restart the system to change to take effect ? Note: I have changed port number in C:\xampp\apache\conf\httpd.conf in two places where it says Listen 80 and ServerName localhost:80 Pls help, thanks.

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• How to share computer's internet connection among network users

  - by RBA

  I wanted to connect to internet from my mobile through laptop wireless-broadband internet connection.. For that I have gone to Network Places, there i have done appropriate settings for "Wireless Network Connection" and "Bluetooth Personal Area Network Connection",, but that Bluetooth connection is still not showing connected.. I have checked the option for "Allow other network users to connect through this computers Internet connection", but still my Bluetooth Connection is still showing not connected.. Please help me out,, as to how can i achieve the same,, as i am having Broadband internet connection, which comes wirelessly to my laptop through a router/modem..

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• In gnuplot, how to plot with lines but skip missing data points?

  - by Anna

  I've got a value associated to each day, as such: 120530 70.1 120531 69.0 120601 69.2 120602 69.5 # and so on for 200 lines When plotting this data in gnuplot with lines, the data points are nicely connected. Unfortunately, at places over a week of data points can be missing. Gnuplot draws long lines over these intervals. How can I make gnuplot only connect points on consecutive days? Solutions that require preprocessing of the data are fine, as I already smooth it with a script. Here is what I use: set xdata time set timefmt "%y%m%d" plot "vikt_ma.txt" using 1:2 with lines title "first line", \\ "" using 1:3 with lines title "second line" Example:

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• Sending mail to local address crashes web server (sendmail)

  - by deceze

  When trying to send mail automatically from a script at example.com via PHP's mail() to [email protected], the Apache server throws an Internal Error. I believe internally it is configured to use sendmail. The message gets dropped into ~/dead.letter and the general error log reads: [Wed May 12 11:26:45 2010] [error] [client xxx.xxx.xxx.xxx] malformed header from script. Bad header=/home/example/dead.letter... S: /home/example/www/test.php Trying any other address, not @example.com, works just fine. I have googled and serverfaulted for solutions, but they all require to edit configuration files in /etc/mail and similar system places, which is not an option, since this problem occurs on a shared host in which I only have access to ~/. Does anyone have a suggestion?

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• Data drive disappearing.

  - by Mike Keller

  We have a Windows 2003 R2 server with SP 2 here that randomly loses a partition. There are two partitions the C: and the D: (the one that disappears). When I go into Disk Management the space shows available on the drive but that it isn't formated. There are two drives that are set up in a RAID 1 array. There isn't anything sticking out in the event log as to something triggering this problem and thank god we do daily backups of the data, but it gets kind of annoying to have to go back in there and reformat the partition and restore the data. Any places I can poke around to find the cause of this or even better solutions to the problem would be appreciated.

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• Multi-Application Server Environment and Memcached Security

  - by jocull

  We are looking to integrate Memcached into our infrastructure, but have a security concern before we do. We run several platforms including ASP.NET and Coldfusion and have many app developers working many little applications across the different platforms. The concern is this: App A places item "dog" into cache. App B reads item "dog" (or worse: App B updates item "dog") After this happens, App A either retrieves bad information, or has already had its information viewed, aka "stolen". What we would like to do is make it so that each app can only interact with its own sandbox, and may not interfere with or read other application's data. Is this possible? Thanks.

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• Real time mirroring between two sql server databases

  - by Matt Thrower

  Hi, I'm a c# programmer, not a DBA and I've had the (mis)fortune to be handed a database admin task. So please bear this in mind when answering this question. What I've been asked to do is to create a real time two-way mirror between two databases with a 10 Megabit connection between them. So when either changes it updates the other. This is not a standard data mirroring/failover task where one DB is the master and the other is a backup - both are live and each needs to instantly reflect changes made to the other. In my head this sounds like a tall order, one which may even be impossible - after all in a rapidly changing environment with lots of users this is going to be massively resource intensive and create locks and queues of jobs all over the place. Is it possible? If so, can anyone either give me some basic instructions and/or point me at some places to start my reading and research? Cheers, Matt

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• Make browsing safe for porn surfers

  - by Brett G

  At several places I've done some work at, I have a suspicion that some of the executives browse porn on their work computers. It appears this porn surfing has lead to virus infections on their computers despite the presence of an anti-virus. Filtering theses specific users' browsing is not an option, so what would be my next best solution be? I put Firefox + Adblock pro on their computers. I'm tempted to add NoScript, but I'm worried they'll start calling when noscript interferes with browsing on legit websites. Is there anything else I can due to mitigate this risk?

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• How can we control the device driver load order in Windows XP ?

  - by Deniz

  We are trying to install both an HP scanner and a Kodak scanner on an XP machine and the problem is that that HP's scanner driver always places itself into the first and default scanner device position. We are using an automation software on that machine which must use the Kodak scanner as the default scanner. The HP flatbed isn't needed to be the default scanner on that machine. It will always be used manually and through its own software. Our developers did some research 2 years ago couldn't find a solution. Nowadays we are preparing to expand our user base and this problem did surface again on machines with the same configuration. I did a more aggresive search pn the net and found some tips like this one : http://support.microsoft.com/kb/115486 I couldn't realize how to suit this solution to my scenario. Could someone please point me to the right direction ?

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• Windows/Samba connection error

  - by Gomibushi

  I have a Linux fileserver serving up /home for linux and windows users. I was able to connect from my windows client, but not from a DC. Then suddenly I could connect from the DC too. The linux servers run Centrify clients, and as such are part of the domain. All on same subnet. This is what the the log.smbd says, repeatedly: [2010/02/11 11:25:57, 0] lib/util_sock.c:read_data(534) read_data: read failure for 4 bytes to client 192.168.200.3. Error = Connection reset by peer On Windows it appeared as an "unknown error". EDIT: the error code is "0x80004005". We are developing a system depended on the samba share, and are worried this will appear again. It would be nice to pin point the root of this. Any ideas what this might be? Places to look?

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• Different display arrangements for two identical displays

  - by Niels

  I have a MacBook Pro running OSX Lion and two workplaces with identical setups: at both places I have an 27" LED Cinema display. At one workplace my MacBook is on the left side of the external display, and at the other workplace it is on the right. I would like to have two different display arrangements for the two different setups, however, when I change the display arrangements in System Preferences when connected to one display, the arrangement is changed for the other display as well. I used to have a 27" and a 24" Cinema Display, and OSX used to remember the display arrangements for those different displays, but now the displays are identical, so they use the same arrangements setting. Is there any way to tell OSX to handle two identical displays as different ones so I can configure two different arrangements for the two setups?

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