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• How can I tell if Windows is running in Safe Mode?

  - by cwd

  I have a Windows server that will sometimes reboot into safe mode after updates. I'm working on that issue but what I'd really like to know is how can I check to see if Windows is running in safe mode or not. Ideally I would like to incorporate it into a script that would send a passive check to our Nagios box with the status. Is there some environmental variable I can use or some way to get this information via the command line?

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• How can one domain route to an always-changing pool of servers?

  - by ryeguy

  I'm sure this is an easy solution, I'm just not too familiar with how DNS works or if that's even related to this problem. If I'm running a web service on amazon ec2, distributed across many instances, how can I make it so a single domain name can be used to access the entire pool of servers, which will be changing from time to time? Since the instances may be present one second but gone the next (and vice versa), I need a way to randomly pick an active member of the cluster to route to. The updates would have to be instantaneous. Is this even possible, with dns caching and all?

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• Changing Java from OpenJDK to SunJava

  - by SpiXel

  I want to change OpenJDK to SunJava in my ubuntu linux desktop , i have downloaded the "jdk-7.tar.gz" from sun's website, but there problem is how to make the system to use the newly downloaded java ? I tried adding the new jdk/bin/java to my PATH ( from .bashrc ) but that seem not to work (cause probably OpenJDK's path is inside my PATH variable as well , so the system checks that first) Here's my JDK7 : /usr/lib/jdk7/bin/java Here's what $(which java) outputs : /usr/bin/java Thanks in advance

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• Configuring memcached for a particular scenario

  - by pradeepchhetri

  I have a web application which queries opentsdb server(which in backend using Hbase cluster) for the datapoints of different metrics and using dygraph javascript graphing library, I am plotting those metrics. Since getting all the datapoints of past one day from opentsdb for a particular metric is itself taking nearly 2 seconds, my application which is plotting nearly 25 metrics is becoming very slow. In order to reduce this latency, I am thinking of using memcached module of php5 for caching all the queries. But I have few questions regarding memcached. Is there any way I can configure memcache to keep on updating its cache in the background by running some command line queries after particular interval of time. Is there any way I can configure memcache to always reply for a query using cache instead of first updating its cache because my application just plots datapoints for past one day. Missing out some datapoints is not that critical.

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• cygwin, PATH problem?

  - by jayjaypg22

  I run a .ksh containing a awk call. awk.exe and his shortcut awk is in /bin/awk, /bin is in the PATH environment variable. But when I try to launch awk, I have this error message : bash: /usr/bin/awk: no such file or directory Why didn't bash look for it in the /bin folder too? edit : tar has the same rights, tar.exe is in /bin and can be listed in /usr/bin/, the exact same way than awk. Tar works fine whereas awk not.

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• nginx to lighttpd detecting request headers

  - by A.Jesin

  I'm moving a site form Nginx to Lighttpd. I was able to move everything except these nginx rules set $enc_type ""; if ($http_accept_encoding ~ gzip) { set $enc_type .gzip; } if (-f $request_filename$enc_type) { rewrite (.*) $1$enc_type break; } I think I can create the variable like this var.enc_type = "" in lighttpd but how do I check if the request header Accept-Encoding contains gzip

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• Process emails with /etc/aliases

  - by Rodrigo Asensio

  I'm calling shell scripts inside /etc/smrsh to process incoming emails as commands for my system. As I'm seeing all incoming emails are not making it to /var/mail/spool/USER. Is there any way I can access to the content of the emails ? some variable $1 $2 comming with the content values ? If not, how do I access to the content of the emails received ? thanks guys

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• Site's performance slows over time until Apache is restarted

  - by udbhav

  I'm running a Django app w/ Nginx and Apache. All our static media is stored on S3, and basically it takes a while for the app to check if thumbnails have been created every time a page is loaded. To alleviate this problem, I'm caching the output of the templates w/ memcached. Over the course of an hour or two, the site's speed goes down significantly, until I restart apache, and then all is good for a little while. I have very little sysadmin experience, and was hoping somebody could at least point me in the right direction.

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• Linux periodically "losing" ability to connect to server via SSH?

  - by gct

  I know this isn't exactly a programming question, but it popped up in my use of git for programming projects at least. I've got a web server that I use to host my git repos on, but my ubuntu box seems to "lose" the ability to connect to it via SSH. I'll get a "connection refused" error when I try to ssh or use git. Rebooting my local machine will fix the problem, but only temporarily. I can still connect to the web interface just fine, and the problem manifests with other servers as well. I've been working around it by pulling my changes over to my laptop and pushing from there, but that's sub-optimal as you can imagine. Has anyone seen something like this? I'd be tempted to say it's some kind of IP caching problem, but I can't connect even using the IP address of the server directly... Running Ubuntu 9.04

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• Occasional HDD Related Hangs

  - by diolemo

  I have an issue that seems to be disk related. Occasionally my system will block for 30 or so seconds and is mostly unresponsive. Those things already in memory requiring no disk access continue to function but those things requiring disk access (even small) hang. 30 seconds later everything is back to normal. I have 2 Samsung drives in RAID 0. I have 1 WD drive (has pagefile) I have an SSD used for caching (Intel Smart Response). This is a new install of Windows and the drives were fine in my old PC (~1 month ago). Has anyone experienced anything similar? Any suggestions to solve this one? Thanks in advance.

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• centos server shared files

  - by Kyle Hudson

  Hi, I am wanting to implement a multi-server specialised hosting environment. I currently have a cloud solution comprising of 3 centos boxes (2 lamp web servers, 1 mysql). What I am wanting to do is, implement a 5 server solution where they is 3 web servers, 1 mysql box and a fileshare. Basically I want the fileshare to host all the web files for the servers, the caching will remain on the individual servers and the sessions will be stored in mysql. So what I am asking is how do I map the servers to share the same "docroot"? Is it NFS? if so whats the best way about doing this? Thanks in advance.

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• Batch image resizing and rotating on OS X?

  - by Moshe

  I'd like to resize a bunch of images of variable size to be 720 by 480. Furthermore, I'd like to have the final image be rotated so that it is right side up. Any tools to help with the resizing at least?

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• ESXI 4.0 Slow response in opening anything accross the network on a Virtual Server running Win2008

  - by user40944

  Hi I recently installed a HP ML350G6 Server with Windows Small Business Server 200864bit, Exchange 2007. The server was running fantastically and we transferred all user data onto the new server and no problems for 2 weeks! We then installed SQL2008 and transferred the accounts package onto the server and this is where the problems started. Users are now complaining to open a work document can take 2 minutes and the same with regard to anything else. The server itself seems fine, the virtual server seems fine! No disk performance problems (doesn't go above 50% unless i really copy lots of things), no memory, (12Gb only using 7Gb) cpu (usage is low average about 15%) etc on both the VM and in Windows Task manager. I have made sure disk caching is enabled on the raid controller (which made no difference). Network cards are running 1Gb and plugged into HP GB switch. Please help!

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• Can I compile mutt under cygwin?

  - by openist

  I've been trying to compile mutt under cygwin for a few days. The included version is outdated and does not include things I need like header caching. Anyways, I always get the message: "configure: error: no curses library found" I have all the curses + devel stuff installed + termpcap, which I heard might be related. I've tried re-installing, i've tried specifying the location on the configure command line, but i'm not sure i'm doing it right: "--with-curses=/usr/lib/libncurses.a --with-curses=/usr/lib/libncurses.dll.a --with-curses=/usr/include/ncurses" Here's my config.log: http://floatsolutions.net/docs/config.log Any ideas? EDIT: Context

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• DFS Replication, Users HOME folder - seems not to catch all files... any hints?

  - by TomTom

  I amm moving stuff out of a file Server. I am using DFS for that - the Folders are anyway in a DFS tree, so I can set up a replication temporarily, then drop the old Folder. Works nice, EXCEPT for the Folder containing the users home drives. Which, incidentally, is also the one I can not see all files in due to my permissions. Small Setup. We have 159mb in the users directories, 1280 files, 133 Folders original. The copy only has 157mb, 1269 files, 133 Folders. Anyone knwos of a way to find out what files are missing? IS this a Problem (could be some Caching files that are regenerated). Users are all offline (weekend) ;) This is pretty much the last share - all others had exactly ZERO issues.

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• Amazon - install a complete server on EBS

  - by user1169575

  is it possible to install a full working OS with a webserver, db, and all needed stuff on an EBS storage? If so, would I immediatly gain benefits by mounting this EBS on a better instance? Otherwise (if I cannot install a complete image, or if you don't think it's reasonable) can I install the software so that I only need to mount the EBS on a new instance to have it working? I purchased a Medium Reserved Instance, but when there will be the need to get a better instance I'd like to move the whole db/website, I'd simply buy a better instance and then attach the EBS. Is it possibile? I'm imaging about it like an hard drive that would be mounted on a better server. Of course, more RAM would allow me to increase caching limits, and that's ok, but I don't want to reinstall anything (the main website is a magentocommerce and it's pretty painful to move it). P.S. is the Standard EBS (100 IOPS) valid or do I need to choose a Provisioned IOPS (up to 1000 IOPS)?

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• CSS file not served by IIS 7.5 after multiple clear cache refreshes in a row in browser

  - by KenB

  We are experiencing an interesting issue with IIS 7.5 static caching and a css file. When we use IE to hit the page in question everything works fine - 200 OK on css file. When we refresh the page it works fine - 304 Not Modified on css file. When I refresh again with control key it reloads fine - 200 OK on css file. Now if I do a control key + refresh multiple times in a row really fast the css fails to load and in the developer tools network it says "Loading..." for the css file and it hangs never coming back. Any ideas?

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• Apache: scope for environmental variables

  - by Anonymous

  While there's documentation available on Apache environmental variables, I can not find answer to one important question. Imagine I use rewrite rules to set environmental variable RewriteRule ... ... [E=something:1] What is the scope of "something" - global Apache server (this means "something" will be available for other request transactions), this request (means that "something" is only valid for THIS http request (and its related processing - but what's about internal redirects and other internal stuff - are they considered as THIS request, or another one?), and may be set differently within another (concurrent) request?

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• Boost Up My Old Laptop Using a SSD

  - by Sina Bizbone

  I have an old laptop Lenovo SL400 (Core2Due T9550 2.66GHz / 4GB DDR2 Ram). Since I can't afford to buy a new laptop, I thought maybe I could throw an ADATA SP600 64GB SSD as primary drive and move my current HDD to DVD-ROM space by using HDDCADDY. I know that 64gb will come short after installing Visual Studio, SQL Server, etc. So is there anyway to just install the kernel part of windows on SSD and the rest on HDD. Doesn't windows have built-in support to do this? (ReadyBoost is out of picture since it's just simple caching)

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• Determining where a file is being cached

  - by RoadieRich

  I've got a debian webserver running apache, from which I regularly download an executable using IE 8 on an XP virtual machine (over LAN). However, I realised that somewhere along the line that I've been repeatedly running the same version (and wondering why my changes weren't being displayed). A Ctrl+F5 in IE will let me download the new version (although the page is always updated with a simple F5). This makes me suspect that the caching is happening in windows/IE, but I'm not certain. Wherever it's happening, is there an easy way to prevent it at the server? Eventually, we're hoping to offer the software to the entire company, and we'd like to avoid having to tell everyone to do a Ctrl+F5 every time there's an updated version.

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• How to access internal network covered by a squid proxy from internet?

  - by Forbidden Overseer

  Our campus uses a squid proxy caching server with a basic authentication for all outbound requests coming from internal network. The whole network uses private IP range from 172.16.0.0 to 172.31.255.255. Most of our faculty websites and library websites are hosted on LAN. I want to access those faculty websites and other internal websites when I am outside the proxy (say when I am at my home and not in campus). I don't know whether I can use the same basic authentication from outside to access those LAN websites. Is there a way I can do that? I don't know whether our proxy server allows it or not, but if that's possible - I want to know how (how to set up browser etc.)?

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• .htaccess to pass FULL URL into other PHP link as $_GET

  - by 4lvin

  From .htacces file, how to pass/redirect the FULL URL to another URL as GET Variable? Like: http://www.test.com/foo/bar.asp will be redirected to: http://www.newsite.com/?url=http://www.test.com/foo/bar.asp With Full Url with Domain.I tried: RewriteEngine on RedirectMatch 301 ^/(.*)\.asp http://www.newsite.com/?url=%{REQUEST_URI} But it is going out like: http://www.newsite.com/?url=?%{REQUEST_URI}

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• How to get the Date in a batch file in a predictable format?

  - by AngryHacker

  In a batch file I need to extract a month, day, year from the date command. So I used the following, which essentially parses the Date command to extract its sub strings into a variable: set Day=%Date:~3,2% set Mth=%Date:~0,2% set Yr=%Date:~6,4% This is all great, but if I deploy this batch file to a machine with a different regional/country settings, it fails because month, day and year are in different locations. How can I extract month, day and year regardless of the date format?

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• MOD_REWRITE not creating correct path

  - by Bill

  SO I am trying to setup a RewriteRule on my server for caching static objects. the files are in this naming scheme /docroot/css/stylesheet.min.css and I have them printed in the code like /docroot/css/stylesheet.min.123438348.css (the number is example it comes from a get modified function). Note docroot is an example directory how can I have the server ignore the numbers and redirect to the stylesheet.min.css I need to do this for every css and js files (/js and /css) as well as one specific spritemap image my current attempt RewriteRule ^/(docroot)/(js|css)/(.+).(min).(.+).(js|css)$ /$1/$2/$3.$4.$6 RewriteRule ^(/docroot/images/spritemap).([0-9]+).(png)$ $1.$3 Update: Now I have the setup like this RewriteEngine on Options FollowSymLinks RewriteRule ^(.+).(min).([0-9]+).(js|css)$ $1.$2.$4 [L] This is rewriting localhost/docroot/css/stylesheet.min.12343242.css to /var/www/html/docroot/trunk/docroot/css/stylesheet.min.css so it is getting the right file how do I get apache to take off the beginning of the that the /var/www/html/docroot/trunk/

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• Availability of big files on multiple servers

  - by Imises

  I have to handle many (1'000 - 30'000) big files ranging from 200MB up to 2GB. The demand for these files is variable (0 - 300 downloads / file). This is why a single file must saved on 2 or more servers. My servers are placed in different datacenters (France), with different size HDDs (750GB to 4TB). Currently I share the files using PHP and ncftpget / ncftpput, but it's very slow. I need a solution to handle balancing these files across 7+ servers.

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