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• trouble loggin into a Mac share from a Windows PC on the network

  - by villares

  I have this mixed network and usually log into the Macs from the Windows XP home machines and vice versa. I have no real networking knowledge, things just seem to work, more or less, with the default settings. Now I've got a new Snow Leopard Mac with a shared folder (added the user names of the Windows users at the sharing preferences) and the trouble is some machines can open the share and others can't. I can't see the difference. It feels like some Windows machines have a "cache" and won't ask for the share password, just deny access. I can also see old shares proposed at the Windows "add network place wizard".

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• Iozone: sensible settings for a server with lots of RAM

  - by Frank Brenner

  I have just acquired a server with: 2x quadcore Xeons 48G ECC RAM 5x 160GB SSDs on an LSI 9260-8i Before deploying the target platform, I'd like to collect as much benchmark data as possible, testing I/O with hardware RAID in various configurations, ZFS zRAID, as well as I/O performance on vSphere and with KVM virtualization. In order to see real disk I/O performance without cache effects, I tried running Iozone with a maximum file of more than twice the physical RAM as recommended in the documentation, so: iozone -a -g100G However, as one might expect, this takes far too long to be practicable. (I stopped the run after seven hours..) I'd like to reduce the range of record and file sizes to values that might reflect realistic performance for an application server, hopefully getting the run times to under an hour or so. Any ideas? Thanks.

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• Dealing with SMTP invalid command attack

  - by mark

  One of our semi-busy mail servers (sendmail) has had a lot of inbound connections over the past few days from hosts that are issuing garbage commands. In the past two days: incoming smtp connections with invalid commands from 39,000 unique IPs the IPs come from various ranges all over the world, not just a few networks that I can block the mail server serves users throughout north america, so I can't just block connections from unknown IPs sample bad commands: http://pastebin.com/4QUsaTXT I am not sure what someone is trying to accomplish with this attack, besides annoy me. any ideas what this is about, or how to effectively deal with it?

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• grep only returns help text

  - by Pete Mancini

  Well, I am perplexed. I am working with an Ubuntu server and I type in grep 'bash' *.sh BUT fgrep 'bash' *.sh works like a champ. which grep and which fgrep both point to their respective executables in /bin. I am perplexed as to what I am doing wrong. EXAMPLE output: $ grep -F 'grounding' repl.clj Usage: grep [OPTION]... PATTERN [FILE]... Search for PATTERN in each FILE or standard input. PATTERN is, by default, a basic regular expression (BRE). Example: grep -i 'hello world' menu.h main.c $ fgrep 'grounding' repl.clj (p/concepts-for-grounding-term imp1 "PERSON" "summary") See? grep is failing but fgrep is working fine. That is why I am perplexed.

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• Apache rewrite rules behind a nginx proxy

  - by Tuinslak

  Hi, I am running nginx (:80) in front of an Apache webserver (:8080) Nginx config (snippet): location / { proxy_pass http://www.domain.tld:8080; proxy_set_header X-Real-IP $remote_addr; If I set localhost instead of www.domain.tld, my browser gets redirect to http://localhost:8080. Apache rewrite rules: RewriteEngine On Options +FollowSymlinks RewriteBase / RewriteCond %{HTTP_HOST} !^www\. RewriteRule ^ http://www.%{HTTP_HOST}%{REQUEST_URI} [L,R=301] RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_URI} !\..+$ RewriteCond %{REQUEST_URI} !/$ RewriteRule (.*) http://%{HTTP_HOST}/$1/ [L,R=301] RewriteCond %{REQUEST_URI} !v2/ RewriteRule ^(.*)$ v1/$1 [L] So far, so good. However, every link (which uses relative paths) appears as http://www.domain.tld:8080/page instead of staying on port 80. Is there any way to solve this through the rewrite rules? I don't want to use absolute paths. Thanks

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• How to remove an entry from Chrome's Remembered URLs from the url bar?

  - by cmcculloh

  I've got a url in Chrome "local.mysite.com" that autopopulates when I start typing "local.my" into the URL bar. Note that this URL DOES NOT EXIST in my browser history (at chrome://history/#e=1&p=0) because it isn't a real site and therefor couldn't ever be successfully visited and therefor never shows up in my history. The URL I want is "local.mysite.com/subdir/". That URL is like 3 down in the suggested results because I keep accidentally hitting "enter" when it auto-suggests the unwanted first URL and thus re-enforcing it's assumption that that is the one I want. How do I get rid of the "local.mysite.com" entry in Chrome's memory?

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• Migrating to ssh key authentication; implications of adding sbin's to users $PATH

  - by ancillary

  I'm in the process of migrating to key's for authentication on my CentOS boxes. I have it all set up and working, but was a bit taken aback when I noticed service (and other things) didn't work the way I was accustomed to. Even after su'ing to root, still had to call the full path for it to work (which I assume to be expected/normal behavior). I also assume this is because there are different $PATH's for root (what I was using and am used to) and the newly created, key-using user. Specifically, I noticed the sbin's of the world missing from the user path. If I were to add those paths (/sbin/,/usr/sbin/,/usr/local/sbin) to a profile.d .sh script for this new key-loving user, would: I be opening up the system in ways I shouldn't be? I be doing something I needn't do save for reasons of laziness? I create other potential problems? Thanks.

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• Deleting sender from Outlook Safe Senders using GPO?

  - by Hutch

  We're having an external company do a mailshot to our users. The message contains images that are linked rather than embedded in the image (bandwidth isn't an issue). So of course on recent versions of Outlook you're prompted to download the images, not the end of the world, but it would be nice if that didn't happen. There's a bug in the Office/Outlook ADM/ADMX templates that means that a custom list of Safe Senders won't import unless you follow this: http://support.microsoft.com/kb/2252421 Thing is, if I remove an entry from the Safe Senders file, it doesn't seem to remove it from Outlook, which seems odd?

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• Redirect traffic to local address so iOS speedtest app measures LAN speed

  - by ivan_sig

  I have mounted a Speedtest Mini server on a local LAMP, so I can test my LAN speeds effortlessly just by opening the URL with a Flash enabled web browser, the thing is, I want my iOS and Android devices to test with the LAN server too, not with the WAN, as I'm trying to measure LAN-Only performance. Is there a way so I can redirect the traffic intended to an specific external IP (The one of the real server) to my local server?. I know the servers IP as a short Wireshark analysis gave me the data, but still searching for a way to make that redirect. I have Jailbreak and root on my devices, so playing with system files is not a problem. I've tried mounting a proxy and making redirects by the hosts file and domain names, but it looks like Ookla's app relies on IP address only.

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• Can't execute java files on command prompts when they work perfectly in Eclipse IDE, what to do?

  - by Eduardo de Luna

  I run the following code in Eclipse IDE: public class HelloWorld { public static void main(String[] args) { System.out.println("Hello World!" ) ; } } And it renders the expected output. When getting into the command prompt (DOS) already in the directory, I type this javac HelloWorld.java And then this java HelloWorld And the output reads Exception in thread "main" java.lang.NoClassDefFoundError: HelloWorld <wrong name:learning/HelloWorld> With a whole lot more errors, learning being the name of my general package. What's wrong? I have installed Eclipse x86 SDK 4.2.0 together bit with the latest JRE and JDK both in 64 bit as well.

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• nginx + IIS + GET

  - by Eralde

  I have nginx on pc "A" & IIS with ASP.NET on pc "B". nginx is configured like this: ... location ~ ((Web|Script)Resource.*)$ { proxy_pass "B"/$1; proxy_redirect off; proxy_set_header REMOTE_ADDR $remote_addr; proxy_set_header REQUEST_URI $request_uri; proxy_set_header HTTP_REFERER $http_referer; #proxy_set_header REQUEST_URI $request_uri; proxy_set_header QUERY_STRING $query_string; proxy_set_header X-Real-IP $remote_addr; proxy_set_header Host $http_host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; }... but requests to "B"/WebScript?a=b&c=d aren't able to deliver GET data (a=b&c=d) to IIS part. Could anyone help with this?

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• Get the MAC addresses of all the machines connected to a LAN when NO machines have got an IP address yet

  - by JtheRocker

  Here is the real scenario. I have say 4 machines not having any IP address yet connected to a switch. In one of the machines (OS=CentOS), I would install a DHCP server and would provide the other machines IP addresses. Prior to assigning them IP addresses, I need to get the MAC address of each of the machines that I would assign IP addresses to. So, my question here is how to I get the MAC addresses of all the machines connected to a switch when NO machine has got any IP address yet? It's mandatory for my use case that I won't be having any IP addresses before the MAC addresses. -Thanks

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• what can be reasons for localhost responding super-slow the first time a page is requested?

  - by frequent

  Still learning my server-ways with Apache2.2/MySQL5.2/Coldfusion8 on localhost (running Windows XP) What I notice is every time I request a page for the first time after firing up Coldfusion and Apache, localhost needs forever (1+ minute to respond and send the inital page). After that all seems to run at normal loading time. I'm using require.js to pull in Jquery, Jquery Mobile and two other plugins on first page load, but loading the same page from a real server works normally, so I'm also ruling out this as a probable cause. Since it happens regardless of which page I'm loading first it shoud not be page related, so I'm looking for other clues on why this could happen. Thanks for some thought!

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• IIS slow response

  - by Martin Ševic

  I have developed ASP.NET 4.5 application which take infos about sensors from sqlite database every 3 seconds. This application runs nice on my local develop machine on IIS Express server. I have created virtual machine (4x 3,25 GHz CPU; 6GB RAM) where i have installed Windows Server 2012 and IIS 8 service in order to test application on real server because we will run it on production machine later. After installing VC++ 2010 x64 and VC++ 2010 x86 and set "Enable 32-bit application" to true in application pool website started to work but there is a large problem with response time. There is a for example 10 seconds delay before page loads. CPU utillization is about 10% and RAM about 1,5GB. I am new to configuring IIS server so i want to ask if there is some tip how to make it faster. I am sure, there will be some twist which will make it normal work. Many thanks.

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• setting up my own name server

  - by mmokh

  I'm in the process of setting up my own name servers using BIND9, however I want to visualize the name server setup in relation to registrars and other name servers. Say I have a domain www.mydomain.com I setup my 2 name servers: ns1.mydomain.com - 192.168.0.1 ns2.mydomain.com - 192.168.0.2 1) How does the world know that my name servers are now at ns1.mydomain and ns2.mydomain. I read about setting up glue records at my registrar. Could you please elaborate on this, i.e. once i setup these glue records, can I now use my name servers in NS records for any other domain? For e.g. NS records for www.otherdomain.com - ns1.mydomain.com/ns2.mydomain.com 2) Given I setup the glue records as mentioned above, do I "have to" update mydomain.com NS records to point to my name servers? Can I keep mydomain.com NS records pointing to my registrars name servers, however use ns1.mydomain.com/ns2.mydomain.com as name servers for any other domain I own? Thanks

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• What is the difference between yum, apt-get, rpm, ./configure && make install

  - by Saif Bechan

  I am new to Linux and am running CentOs. When I want to update or install certain software I came across three ways. Sometimes it's: yum install program rpm -i program.rpm wget program.tar.gz unpack ./configure make make install That last one is a real pain, esp when you come from windows where a program install is usually one click and then a nice guide. Now can someone please explain to me: Why are there so many different ways to do this? Which one do you recommend to use and why? Are there any other ways for installing programs?

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• Constantly visible notification and access icon for Empathy in Gnome 3

  - by aef

  Since a short while I'm using Ubuntu Oneiric Ocelot (11.10) with gnome-shell (Gnome 3) and I'm trying to get accustomed to the default Empathy Instant Messaging client. One mayor problem for me (coming from Gnome 2 and Psi) is that there is no constantly visible icon which makes it clear (for example by changing its icon or showing an animation) if there are incoming messages which I did not read already and which lets me jump into them with one click. Also I'm missing a way to bring up the contact list or hide it away with a click. I sometimes have real problems even figuring out how to even open the contact list up again. Is there a Gnome 3 extension or some other trick available to display such a notifier in the top bar? I'm talking about something just like the sound and network controls which are already located there. I know that there are notifications in the lower notification area (former system tray), but as it is only visible as I move the mouse in the lower right corner of the screen, its useless for me.

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• RAID 1 after install and two controlers

  - by jfreak53

  I have question regarding RAID 1. Can I setup software RAID 1 after having installed the first drive and setup ubuntu 12? I know that during server install and partitioning I can select RAID and setup then, but what I am not clear on is how in the world to setup RAID 1 after the fact? Can someone provide directions for this? Also, can I RAID 1 two drives one being 500GB and the mirror drive being 1TB? Of course the mirror drive would have a 500GB partition but that's my point. Lastly, can one drive be on IDE and the other on a SATA controller? I know speed will be an issue, that doesn't matter, I just need to know if it will work without corrupting data and if it's the same process? Thanks.

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• How to wipe the slate clean on an Oracle installation?

  - by nw

  After a basic, successful installation of Oracle 11g, I ran dbca again to enable Enterprise Manager on my database. The operation hung at around 67% for half an hour or more, so I clicked Stop to abort the operation. Things seemed to wrap up cleanly, EM was working, all was well with the world. Then I started getting this dreaded error upon any attempt to connect in SQL*Plus: ORA-12154: TNS:could not resolve the connect identifier specified I thought perhaps the database had been corrupted due to the earlier aborted operation, so I ran dbca again and deleted the database. Then I attempted to create a new database in its stead, using a clone of the template created the first time around. Unfortunately, the clone database operation fails at 50% with the exact same error: ORA-12154: TNS:could not resolve the connect identifier specified How can I clean up the mess I have created, short of reinstalling Oracle entirely from scratch?

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• I have problem with pc. Random reboots with post hyper transport sync flood error

  - by user29867

  I have problem with my pc. Random reboots with post "hyper transport sync flood" error. It happens completely random. Most times i watch movie, some times when i play a game, even when i browse internet. My spec are as follow: MB ASUS M4A78-E CPU Phenom II 940 Sapphire Radeon hd4850 Vapor-X RAM OCZ DDR2 PC2-8500 kit 2x2GB PSU CM Real Power M520W CASE CM Centurion 590 Temps of MB, CPU and 4850 are in normal range. MB is hooter, around 60-70°C under load, Radeon 60-65°C under load (playing game for couple hours). CPU dos not past 50-55°C. So i think its not a cooling problem, CM case is pretty good, and have a lots of fans. I try with this memmory: TWIN2X4096-6400C5DHX same problem.

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• Mac OSX DHCP Stopped Working [on hold]

  - by Jesse James Richard

  Tethering a Raspberry PI to a MacBook (Mavericks) via ethernet is proving to be a real pain. This worked for about a day. My MacBook required a rare reboot and once it came back up the Pi won't get an address. I've confirmed it's not a problem with the Pi. It's a problem with the MacBook for sure. It's basically just stopped giving out IPs. I've read as much as I've found about how to fix this friggin' problem, but I've thus far come up blank. Internet sharing Wi-fi Ethernet enabled, and/or Edited /etc/bootpd.plist as described here (http://www.jacquesf.com/2011/04/mac-os-x-dhcp-server/ - this worked initially and now no longer does) Pi connected directly to the router has no problems. My MacBook DHCP server will no longer give out addresses. Any help would be much appreciated.

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• SQL Server 2005 64bit on 16GB machine uses 3.6GB memory only

  - by ArjanP

  Maximum server memory is set to the maxvalue AWE is disabled (should not be needed in 64 bit anyway) Windows Server 2008 Enterprise SP2 It is a virtual server using VMWare If I look in Task Manager the sqlservr.exe process only uses about 3.6 GB of memory. Is that number not real? Shouldn't it attempt to use all available memory? If I run DBCC MEMORYSTATUS I get: VM Reserved 16670136 VM Committed 3640664 It looks like a memory limit I shouldn't be seeing in a 64 bit environment.. how can I get SQL2005 to use more memory?

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• Detecting hardware and installing drivers in Windows XP

  - by JL.

  I have on my desk a computer that I am reinstalling. I have just completed the Windows XP install , which is professional service pack 3. I have also installed an AV package. Now it is time to install the audio and display drivers. Windows Update does not detect the Display card, and neither the audio device. I really have no idea what devices are present in this system, and I am thinking of opening the case, and reading some IDs from the cards themselves. Before I do this, is there not some kind of tool that can automatically detect hardware and install drivers automatically. If not then at least tell me what devices are present, with some real descriptions, so I can search for drivers.

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• Application runs with different speed for two different user logins on windows server

  - by karthi

  We have a application in Windows Server that download data from SQL server and store in our local machine. Now the problem I have is my Windows Server has two logins and in one login the app runs real slow, like gets 1 row in a minute, and from another login it fetches 20 rows in a minute. We have this problem only for a last couple of days. What could have caused this? More details: SQL server:S QL server2008 Os: Windows server 2008 Access method: Remote connection. Application: Custom .Net application to get data Both accounts are limited rights accounts. Any tools to track this? I am not sure what should I start with.

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• Transporting servers - need special rack/case

  - by Nso

  I am responsible for our companys server infrastructure at trade shows. We have 2 annual shows, 1 in Las Vegas and 1 in Amsterdam, so obviously our servers do quite a bit of travelling. Quite often, it gets home with pieces falling off, and insurance/rebuilding takes ages and cost a lot of money. For now I have been using a wooden rack-box, with steel-reinforced sides/corners, but I am looking for something tougher. Does anyone have experience with sending servers all around the world, without them dieing all the time?

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