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• Amazon AWS VPN how to open a port?

  - by Victor Piousbox

  I have a VPN with public and private subnets; I am considering only public subnet for now. The node 10.0.0.23, I can ssh into it. Let's say I want to connect to MySQL on the node using its private address: ubuntu@ip-10-0-0-23:/$ mysql -u root -h 10.0.0.23 ERROR 2003 (HY000): Can't connect to MySQL server on '10.0.0.23' (111) ubuntu@ip-10-0-0-23:/$ mysql -u root -h localhost Welcome to the MySQL monitor. Commands end with ; or \g. --- 8< --- snip --- 8< --- mysql> The port 3306 is not reachable if I use the private IP? My security group allows port 3306 inbound from 0.0.0.0/0 AND from 10.0.0.0/24. Outbound, allowed all. The generic setup done by Amazon through their wizard does not work... I add ACL that allows everything for everybody, still does not work. What am I missing?

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• Why does my PC successfully boot only when unplugged for more than a few minutes?

  - by philg

  I have an HP Pavilion Elite desktop computer, model HPE-490t. I like it because it didn’t cost too much, boots itself from an SSD, came with 16 GB of RAM, and has 6 CPU cores for editing video and camera RAW images. It has one behavioral quirk that I cannot explain, however. The recent power interruptions here in the Northeast got the machine into a state where it could not be restarted. It would power up for a second or two, shut down, and then power up again, never being able to get to the point of showing anything on the monitor. I unplugged it for about 10 seconds and plugged it back in. Same behavior (fails to boot). I unplugged it and walked away for an hour, then plugged it back in and it worked perfectly! I think something similar happened after installing a second hard disk drive into this machine. So the question is why does the computer behave differently depending on how long it has been unplugged? Where is energy stored that affects the machine’s ability to boot? Capacitors in the power supply? Battery on the motherboard (there is one for the clock, but that wouldn’t be exhausted by being unplugged for an hour, I don’t think)?

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• Windows Server 2012 Hyper-V very slow

  - by Matt Taylor

  I have been running several Hyper-V VMs on Windows Server 2008 R2 for the past couple of years and enjoying perfectly adequate performance for my testing/development/r&d environments. I'm a software developer so my hardware knowledge is basic however I built the rig using: •Gigabyte GA-X58A-UD3R Intel X58 (Socket 1366) DDR3 Motherboard •Intel Core i7 960 3.20GHz (Bloomfield) (Socket LGA1366) •24GB triple channel RAM The host OS is running on an OCZ SSD and all the VMs are running on a 2TB Marvell SATA3 RAID 0 array consisting of 2 Western Digital Caviar Black 7,200rpm drives. I have tested the speed of the 2TB drive and appear to be getting less than 3Mbs but it can adequately run a 4 VM farm including a DC, (SQL) database and IIS application servers. I recently upgraded the SSD on which the host runs to a 256GB OCZ Vertex 4 and took the opportunity to upgrade to Windows Server 2012 and installed the Hyper-V role. I tried importing one of my existing Windows Server 2008 R2 VMs (and converted it to .vhdx) plus I have tried creating a brand new Windows Server 2008 R2 VM but both are running extremely slowly and I can see nothing obvious using the host and guest Task Manager/Resource Monitor tools. In both cases the VM has 8GB RAM (fixed), 4 CPUs, fixed size HD (not expanding) and is using an external virtual network running on a separate NIC to the host. I have upgraded the BIOS to the latest available version and checked the virtualization settings. I have run out of "obvious" (to a developer) things to check/configure and my next option will be to re-install the host OS but before I do I would very much appreciate any advice from any experts out there. Thanks

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• Why do HTTP loopback connections not work on my subdomains?

  - by memeLab

  I have a shared hosting account at Jumba running Linux kernel 2.6.9-103.ELsmp (don't know if that helps) with cpanel 1.0 (RC1). I am using the WordPress plugin Backup Buddy, which requires HTTP loopback connections to monitor / complete backups. This works fine on memelab.com.au, but doesn't work at any subdomain (e.g.: staging.memelab.com.au). Is it possible to setup an A record or some such to remedy this? I'm aware of a workaround, (setting WP_ALTERNATE_CRON) but I find this unsatisfactory due to the messy URLs. BackupBuddy:_Frequent_Support_Issues#HTTP_Loopback_Connections_Disabled Here is the reply from my host: …as main domain have it's own separate DNS entry it have localhost entry which helps for looback connections where as subdomains don't have separate DNS zone, so it is not possible to create looback connections for it. I have cpanel access to the 'advanced zone editor' - is there anything tricky I can do there? maybe 127.0.0.2? (I remember reading that there were at least 8 available local IPs available on (some) Linuxes.) All the A records point to the server IP, with the exception of localhost.memelab.com.au which points to 127.0.0.1. I've just tried entering a new A record: localhost.itours.memelab.com.au pointing to 127.0.0.2. I still get the warning in Backup Buddy that loopback is not active, and Cpanel won't let me enter 127.0.0.1 (guess it doesn't work like that!) nslookup itours.memelab.com.au Server: 203.88.112.33 Address: 203.88.112.33#53 Non-authoritative answer: Name: itours.memelab.com.au Address: 117.55.224.177

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• Tomato/DD-WRT router to act as switch & only NAT some port

  - by fseto

  BACKGROUND: I have a device that must use a real IP address. Currently, my ISP uses DHCP and I can have up to 4 real IP address assigned. However, the cable modem only have 1 ethernet port and it's connected to my router (running Tomato, but can run DD-wrt or other Openwrt if required). Question stems from how I can connect the additional device, requiring a real IP? EASY SOLUTION: would be to get a switch and connect to the CM, Router, and Device. But alas, I want to avoid this route, since: my wiring cabinet in my home is drawing lots of power and heat already Device will be unprotected by any firewall unable to monitor the traffic to/from device. Besides, what would be the FUN in that? =) IDEA: So what I want to do is to configure the router, so that one of the switchport is removed from the normal br0 bridge. Instead, I want to make it behave like a switch on the WAN port. What's the best way of doing this? Should I create another bridge on the WAN & the device port? Can a single port belongs to two bridges? or would I need to create a subinterface first? Would I need a DHCP-relay? Am I expecting too much from my poor cheapie router? +------+ | CM | +--++--+ || +----WAN---------------+ | / \ Router | | BR1? BR0 | | | \ | | | {NAT} | | | / | | \ | +-P0----P1-P2-P3-Wifi--+ | +------+ |Device| +------+

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• GUI interfaces to ATI card behave weirdly out of the box and after updates.

  - by jdk

  My Lenovo W500 came with an ATI Mobility FireGL V5700 and both the Catalyst control center software and Vista display manager display four monitors. What's really annoying is the behaviour. My two active displays (laptop display + my external monitor) are always #s 3 and 4 respectively which doesn't make sense. This is out of the box. Additionally dragging & dropping is jumpy and displays #1 and 2 (always inactive because they don't exist to the software) are often preventing me from dragging #3 and 4 to the rightmost side. They also auto-snap to weird positions and certain sensible positions like position one directly over top of the other are not possible. The exact same annoyances are present when using the Windows Display manager too. In other words the interface is crap and I'm looking for a fix that's not wishing I had gone with nVidia instead. I've updated drivers, and Catalyst control centre. Have latest Windows and AMD/ATI updates. Any thoughts? Graphics Software Driver Packaging Version 8.563.2.1-090401a-079160C-Lenovo Provider ATI Technologies Inc. 2D Driver Version 7.01.01.849 2D Driver File Path /REGISTRY/MACHINE/SYSTEM/ControlSet001/Control/Class/{4D36E968-E325-11CE-BFC1-08002BE10318}/0001 Direct3D Version 7.14.10.0630 OpenGL Version 6.14.10.8306 Catalyst® Control Center Version 2009.0401.1328.22301 Graphics Hardware Primary Adapter Graphics Card Manufacturer Powered by ATI Graphics Chipset ATI Mobility FireGL V5700 Device ID 9591 Vendor 1002 Subsystem ID 2126 Subsystem Vendor ID 17AA Graphics Bus Capability PCI Express 2.0 Maximum Bus Setting PCI Express 2.0 x16 BIOS Version 010.088.000.021 BIOS Part Number BK-ATI VER010.088.000.021.034663 BIOS Date 2009/09/30 Memory Size 512 MB Memory Type DDR3 Core Clock in MHz 600 MHz Memory Clock in MHz 700 MHz

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• Can't display RSSI values in Wireshark

  - by Giovanni Soldi

  I am trying to analyze the up-link Wireless traffic generated by my Sony Ericsson phone and captured by my D-Link router, on which I installed the DD-WRT firmware. To do this, first I log in the router and enable the prism0 interface by typing the command: wl -i eth1 monitor 1 and then I start to capture the packets by typing: tcpdump -i prism0 ether src xx:xx:xx:xx:xx:xx -s0 -w /tmp/smbshare/sony_ericsson_test.pcap where xx:xx:xx:xx:xx:xx is the MAC address of my Sony Ericsson phone. After a while I transfer the sony_ericsson_test.pcap file to my computer and open it with Wireshark program. In order to display the RSSI values I follow this procedure: Edit - Preferences... - Columns - Press "Add" button - As "Field type" I choose "IEEE 802.11 RSSI" and finally I choose name "Power" and click on "Apply" button. The problem is that the column "Power" is empty with no RSSI values. Does Anyone has a clue on why are RSSI values not displayed? Maybe I am missing a passage. Looking forward to hearing from anyone of you! Thanks in advance for your help!

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• Very high-pitched noise when computer does something intense?

  - by Starkers

  "Intense" is the best word I can use to describe it because I'm not sure what it is, whether it's RAM, GPU or CPU. If I pan the camera in unity: A high pitched noise issues from the computer. The picosecond I start panning the sound starts. Stops the picosecond I stop panning. If I start an infinite loop: 2.0.0p247 :016 > x = 1 => 1 2.0.0p247 :017 > while x < 2 do 2.0.0p247 :018 > puts 'huzzah!' 2.0.0p247 :019?> end huzzah! huzzah! huzzah! An identical high pitched noise can be heard. I don't think it's the GPU due to this simple experiment. Or any monitor-weirdness (although the sound does sound like one of those old CRT monitors if you're old enough to be young when those things were about) The CPU? Or maybe my SSD? It's my first SSD and the first time I've heard this noise. Should I be worried? Regardless, what's causing this sound? I can't think what would cause such high frequency vibrations. I built the PC myself. Not enough heat paste on the CPU? Too much? Just no idea what's going on. Info: CPU Type QuadCore Intel Core i5-3570K, 3800 MHz (38 x 100) Motherboard Name Asus Maximus V Extreme Flash Memory Type Samsung 21nm TLC NAND Video Adapter Asus HD7770

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• EC2 instances keep becoming inaccessible via SSH, can I use elastic loadbalancer to check SSH connectivity?

  - by Rick

  This is mainly an issue for my development ec2 server as it seems that my instance keeps becoming inaccessible via SSH. It happened yesterday so I killed that one and started a new one and happened again later today. The server still works, my web application is accessible in a web browser but whenever I try to connect via SSH I get a pemrission denied (public key) error message in my terminal. I am 100% sure I am doing nothing wrong as I can create a new instance of the exact same AMI (its a personal custom AMI), change absolutely nothing, including using the same .pem key, and then am able to SSH into that new instance using the exact same command as before (just changing the IP address). I understand that ec2 can have issues but having this happen every day seems a bit odd.. I am using an m2.xlarge instance so I don't know if these tend to be unstable, in the past I have used a small instance and had it running for months with no problems which is why I find this so odd. I am looking into using loadbalancing but it seems the only "health" checks they offer is for http or tcp so I'm not sure if I can make it monitor for SSH connectivity. This is important for development as I may make 1-2 new pushes of an application a day and use SSH to do this. I have a designer that needs to have the app always accessible as he works with the front-end files to test output with the live application. Anyways, any advice / info is appreciated

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• How to stop Firefox on an SSD from freezing when using the search box or submitting a form?

  - by sblair

  Firefox usually freezes for about a second whenever I search for something from the toolbar search box, when submitting a form, or when clearing the search box history. I suspect it has something to do with the auto-complete feature. Using Windows 7's Resource Monitor, the problem seems to be from the file: C:\Users\<username>\AppData\Roaming\Mozilla\Firefox\Profiles\<profile>\formhistory.sqlite-journal I believe this is a temporary file which caches database writes. The following screenshot shows the very high response times from six different searches, and that the queue length on drive C shoots off the scale: My Firefox profile is on an Intel X25-M G2 SSD. The problem doesn't seem to occur if I create a new profile on a hard disk drive. However, I'd like to know why the problem exists on the SSD in the first place (because it's an annoying problem which contradicts the reason I bought an SSD, and it might happen with other applications too), and how to prevent it. It still occurs if Firefox is started in safe mode, and with the recent beta versions. Updates: VACUUMing the Firefox profile databases does not help with this problem. The SSD Optimizer in the Intel SSD Toolbox does not help either.

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• Is a Hyperthreaded CPU more powerful and more efficient than a Dual-core CPU? [closed]

  - by user1811864

  which computer to choose with Pentium processor hello they are getting rid of the old computer equipment in the office and i have to choose the computer to take home i get first choice to pick. -15 inch lcd screen 4 gb of ram core 2 duo dual Core E8400 3.00 GHz dvd writer windows vista/ linux -15 inch crt monitor with 2 gb ram and pentium 4 2 ghz single core HT technology windows xp hardisks both 250 GB my friend is telling me to choose the second one Pentium single core HT because he told me it runs faster becuase of HT technology and cooler and consumes less current electricity so it wont get overheated because it has HT technology so it's high definition for encoding and watching HD movies and HD sound and is like a gaming pc to play internet games. And also he said the dual core 8400 runs at 3 ghz compared to the 2 ghz so it heats very much because of the two extra cores so it takes more current raising electricty bills and is not good for gaming and watching HD movies and internet flash animations and games because of getting heated everytime. And he wants to choose and take the E8400 because he has air conditioning at home so it will be safe from heating. So which one computer should i take is it really faster because of the HT High definition technology and will i be able to play internet flash card games better and watch good HD movies Youtube etc and play all the music and songs.

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• After upgrading to 2008 R2 Enterprise and installing more RAM, Windows can only see 4.00 GB

  - by Tom Crane

  (I have also posted this on technet but I'm running out of ideas) I've upgraded from Windows Server 2008 R2 Standard to Enterprise in order to make use of more RAM. The server previously had 32GB of RAM. The upgrade from Standard to Enterprise, using DISM, seemed to go OK, so I powered down and installed the RAM. This a Dell Poweredge T710, I was taking it from 32GB to 72GB. The BIOS recognised the RAM, although I needed to change from "Advanced ECC" to "Optimizer" mode for it to use all of it. After rebooting, windows can see the RAM but in the system panel will display: Installed memory (RAM): 72.0 GB (4.00 GB usable) In the resource monitor, the remainder of the RAM is showing as reserved for hardware. I've tried various RAM configurations, including reverting it to the same chips and same configuration as before the upgrade, but always just 4.00 GB is showing up as usable. Following some threads on these forums I've gone into msconfig and set the maximum memory "by hand" but that doesn't fix the problem. BIOS doesn't seem to have anything that looks like memory remapping which is another suggestion that has come up. How do I make this RAM available to Windows? It was available before the upgrade, because I could use the full 32GB RAM the server had to start with. A screenshot (this is after reverting to the original RAM configuration) http://screencast.com/t/5FuzevdNb I don't know if it's related, but my remote desktop configuration has also disappeared: screencast.com/t/mYedomeQWS (the bottom half of this dialog should allow me to configure Remote Desktop, it was working before the upgrade but now it isn't).

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• Windows Explorer Hangs on Right-Click

  - by Bryan

  I am not sure if this is the right site to post this one as I typically post coding questions on stackoverflow. But I'll ask anyways and hopefully someone can move it if it's incorrect. Currently I have a customer built PC, utilizing an Intel i7 chip, 1300WATT PSU, 8Gigs of RAM, and two video cards. Originally I had the one video card (NVIDIA) that used the PSU and had two DVI output. After purchasing a third monitor I installed another ATI) graphics card not needed any PSU connectors. After installing and restarting, I noticed that when I right-click on my desktop, or through Windows Explorer it will hang, freeze then restarted. Sometimes after Windows Explorer restarts the problem dissipates. I checked to make sure everything was connected properly and it was. I repaired the ATI Catalyst Control Center to see if that had an issue, and I checked to see if either video card required updated drivers. Nothing worked. I tried restarting my PC and that didn't work. I tried using ShellXView (I forgot what it's actually called) and tried closed processes but that didn't work. Does anyone have any idea what could have caused this orpossible solutions I should try?< Thanks in advance.

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• Server 2008 RAID 5 Write Speeds

  - by Solipsism

  I recently configured a RAID 5 partition in Server 2008 with 4 RAID 5 disks. These disks are connected through a SATA expansion card that uses PCIe. This morning, I checked and they had finally finished synchronizing, and so I tried to do some speed tests. Copying off the disks started pretty much fine - speeds began at 125MB/s, then trailed down to about 70MB/s, which I found odd but not worrying. Writing TO the disks however is a completely different story. I attempted to copy some of my VM host ISOs onto the disks (~2-4 GB apiece) and this resulted in speeds of approximately 10MB/s. I tried copying both from a local disk (connected directly to the motherboard) and from another server ththe gigabit network and results were the same. I checked the performance monitor while transferring the files and the only thing that stuck out was that my memory hard faults shot up to 6,000 per minute (spiking around 200/s) by explorer.exe. The system is running 2GB of DDR667 ECC RAM and a quad-core 2.3GHz opteron. Is there anything I can do to fix this performance issue (buy more RAM? move the drives to a faster box?, etc) or am I just screwed so long as I stick to windows.

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• Orphaned SQL Recordsets/Connections with IIS

  - by Damian

  I have an IIS 6 site running on Windows 2003 Server x86 with MS SQL2005 Enterprise edition running ASP Classic (no choice). The site runs very fast with about 8000 page views per hour. All of my SQL tables are indexed and I have used the profiler to check my queries, the slowest of which is only about 10-15ms. I have autoshrink disabled, autogrow is set to 250mb, database is 2gb with 800mb of free space. My problem is that every now and then the site will slow to a crawl for no reason. Pages that just have a simple 'connect to databse and increment a hit counter' work ok, but more SQL intensive pages that normally execute in about 60ms take 25,000ms to run. This happens for about 30 seconds and then goes away. I was having an issue with orphan recordsets and connections due to the way I was releasing them. I have fixed this up and the issue is much better, but I am still getting them. Is there a way with permon, etc. to track when SQL Server or Windows closes these Orphan connections? At least if I can monitor the issue I will know if I am making progress or if I am even looking at the right things. Is there anything else I might be missing? Thank you!

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• Someone from china wants kill my entry bandwidth??

  - by yes123

  Hi guys. Someoen from china with two different ip is downloading the same big file from my server. Their ip are: 122.89.45.210 60.210.7.62 They requesting this file and downloading more than 20 times per minute. What Can I do to prevent this? (I am on gentoo with root access) And WHY they do this to a site that doesn't have nothing to do with china ? ADD1: Other ips: 221.8.60.131 124.67.47.56 119.249.179.139 60.9.0.176 ADD2: the stupid thing is they are requesting only 1 single file lol. Or they want that file removed (tho i don't see why) Or they are pretty stupid ADD3: Situation is getting worse. IP are spreading from other countries too (usa and korea if www.geobytes.com/iplocator.htm it's right) And now they are requesting another file. ADD4: it seems after they realized i removed that file they stopped attacking me. I will monitor the situation. They started again after a sleep of 3-4 mintues with the same file (lucky me). Hard to say why this is happening

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• Load is 0, yet site crawls (sometimes). What gives?

  - by Yegor

  I have a ~1.5-2mil page views per day site running on 2 servers. One for mysql, other for everything else. Mysql box has a load of 3, frontend is usually 0.0-0.1. Both are dual quad core with 8GB ram running SAS drives in raid5. CPU is idle for majority of the time, iowait is non-existent. Im running nginx, memcache, and site is built on php. Half the time everything runs perfect, while at other times it lags something severe, when it takes 10-15 seconds for a page to load. Page execution time is always super low, but it seems to hang, waiting for something before it actually loads the page. Whats even more weird is that it only happens to 1 file on the site (but its the one thats most commonly accessed, that actually loads the content on the site). Other pages are super fast at all times, even when it takes 15 seconds to load actual content. I have nginx_stats plugin installed, and if I monitor it, the lag spikes happen when the write column starts going above 100, and it frequently does... all the way to 500-1000. It does so at totally random times... not when traffic is heavy... it can do this in the middle of the night, and work perfectly at 5pm when traffic is at its highest. Any ideas?

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• batch copy files with error log on missing permissions

  - by sc911

  Hi *, I'm searching for a tool to batch-copy files, that should support the following points: copy files from a net-share report any errors show errors only or filter log on errors don't stop on an error also report if a file or a folder could not be copied due to missing permissions if possible it should have a queue where new job can be added while copying I tried the following tools: TerraCopy: takes a lot time to just calculate the time and the size of the job and does not report errors due to missing permissions (it doesn't even add those files to the copy-queue) Karne's replicator: does not report errors due to missing permissions xcopy: does a great job when using the right parameters and piping the output to a file (in the German localization xcopy /k /r /e /i /s /c /h SOURCE TARGET>LOGFILE 2>&1 will do the job. opening the logfile in IE will give you a great monitor). but quing jobs it not possible (ok, you can join them all in a batch-file, but you can not queue jobs while another one is running (hm, thinking of a batch-script that loops through a file with the source-target-config...)) to be continued Which tools do you use? Tell me! Thx sc911

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• Windows media scaling/interpolation method

  - by MichaelH

  Usually in Windows, if videos or other media is upscaled from a certain resolution to a higher resolution (e.g. "monitor size"), a bilinear filtering algorithm or similar is used, such that the upscaled material doesn't look blocky. On my system however, the used interpolation algorithm changed from 'bilinear' to 'nearest neighbor' at some point, with the effect that upscaled videos (e.g. viewed in MPC or WMP, and also Skype video streams) and games (e.g. from PopCap) appear rather blocky. Not sure what the common factor between those is, could be DirectShow(?). I am not aware of having changed any setting that could have affected this state, in fact I am not even aware such a setting exists. I'm guesing that some installed software must have changed something on my computer. My computer is running Windows 7, but I had already experienced the same effect on an XP machine some while ago, where it changed back again to the more pleasing bilinear interpolation after a while, as magically as the first time. What could be wrong with this installation, and how can I change this upscaling interpolation behavior?

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• ksh Auto-Completion PuTTY Configuration

  - by Nitrodist

  I'm having a bit of a problem configuring my PuTTY client to work with the auto-completion feature in the ksh shell. I do a listing on the root with the directories /home and /homeroot and it returns the directories in a list just fine. I can't select it, though, by hitting X = (where X is the number). /home/nitrodist>ls /h #hits esc + = 1) home/ 2) homeroot/ #hits 2 + = for the 'homeroot' dir 1) home/ 2) homeroot/ #hits just the '=' key. 1) home/ 2) homeroot/ Any ideas? I've su -'d to another user who can actually do it with their PuTTY session and I can't do it there, which makes me think it's a PuTTY configuration issue. This is running on a ksh93 shell on HP-UX, if that makes any difference. Here's my ksh config: /home/campbelm>set -o Current option settings allexport off bgnice on emacs off errexit off gmacs off ignoreeof off interactive on keyword off markdirs off monitor on noexec off noclobber off noglob off nolog off notify off nounset off privileged off restricted off trackall off verbose off vi on viraw on xtrace off /home/campbelm>

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• SQL Server becomes slow after restart

  - by Tobi DM

  I already posted this one on stackoverflow but someone gave me the hint to that I might have more luck on serverfault. We use SQL Server 2005 on an Windwos Server 2008. Ther Server has 48 GB RAM. SQL Server is configured to use 40 GB RAM. There is only one database hosted (About 70 GB). The only app beside SQL Server is our App-Server which connects the clients to the database. Now we encounter the following problem: After a restart of the server our the performance is great. The server grabs the 40 GB RAM wich it is allowed to and then runs fast as hell. But after about 4 weeks the system becomes slower and slower. The execution of statements (seen in the profiler) is raising slowly. But I cannot see that there is something going wrong on the server. CPU usage is at about 20% I/O also seems to be no Problem The process monitor does also not show that there are strange apps or something like that. Eventlog does also have no interessting messages No open transactions or blockings to see We do not use cursors in our app We tried already the following things without effect: Droped the cache by using the statements DBCC FreeProcCache DBCC FREESYSTEMCACHE('ALL') DBCC DropCleanbuffers Restarted the Appserver we are using. Restart the sql server service But nothing did help exept restarting the whole server. Any ideas?

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• Help, my CentOS servers keep going down , No route to host after a random uptime

  - by user249071

  Hello , I have a couple of Centos linux servers, that have a very simple task, they run nginx + fastcgi for php , and some NFS mounts between them, readonly They have some RPC commands to start some downloading processes with wget, nothing fancy , from a main server, but their behavior is very unstable, they simply go down, we tried to monitor ram , processor usage, even network connections, they don't load up so much, max network connections up to... 250 max, 15% processor usage and memory , well, doesn't even fill up, 2.5GB from 8GB max , I have no ideea why can a linux server go down like that, they aren't even public servers, no domain names installed no public serving, for sites. The only thing that I've discovered was that if i didn't restart the network service every couple of hours or so... the servers were becoming very slow, starting apps very slow, but not repoting a high usage of resources...Maybe Centos doesn't free the timeout connections, or something like that...It's based on Red Hat right? I'm not a linux expert , but I'm sure that there are a few guys out there that can easily have an answer to this , or even have some leads to what i can do ... I haven't installed snort, or other things to view if we have some DOS attacks, still the scheduled script that restarts the network each hour should put the system back online, and it doesn't.... Thank you in advance

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• IIS not responding with SSL Server Hello

  - by Damien_The_Unbeliever

  I'm having difficulty getting a particular IIS machine to "do" SSL. This is a test environment (one of many) which we've set up "the same" as we have many times previously, but it just doesn't seem to be working. The server is Windows Server 2003 (Version 5.2 (Build 3790.srv03_sp2_gdr.100216-1301 : Service Pack 2)) IIS is hosting 4 sites (including the default site), but only one site is configured for SSL. We're using the same SSL certificate we use on all of our other servers (it's a wildcard cert). (Don't think this is relevant, but including anyway) We've configured the site to require SSL, it has a subdirectory that doesn't require SSL but has an asp page that redirects into SSL. The 403;4 error page for the site is hooked up to this asp page (this is how we do our non-HTTPS into HTTPS transition). Using Microsoft Network Monitor (3.3), I've just run a session against a server where SSL is working. It can pull apart the SSL exchange as the following messages: SSL: Client Hello SSL: Server Hello. Certificate. Server Hello Done SSL: Client Key Exchange. Change Cipher Spec. Encrypted Handshake Message. SSL: Change Cipher Spec. Encrypted Handshake Message However, on our problem server, I only see: SSL: Client Hello. The next packet from the server (from port 443, so it's listening and responding there) contains only 60 bytes, and just seems to have the Tcp headers and not much else (but I'm by no means an expert at deciphering these things). So, where do I look next? Or what additional information do I need to add to this question, and where do I find it?

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• need some help figuring out clamav & monit monitoring error...unixsocket...

  - by Ronedog

  I need a bit of help figuring something out. First off, I'm not very well versed with FreeBSD servers, etc. but with some direction hopefully I can get this fixed. I'm using FreeBSD and installed Monit so I could monitor some of the processes that run tomcat, apache, mysql, sendmail, clamav. So far, I'm only successful in getting apache & mysql to be monitored. I'm getting this error for clamav in the log file for /var/log/monit.log 'clamavd' failed, cannot open a connection to UNIX[/usr/local/etc/rc.d/clamav-clamd] My config file for clamav in /etc/monitrc is: #################################################################### # CLAMAV Virus Checks #################################################################### check process clamavd with pidfile /var/run/clamav/clamd.pid group virus start program = "/usr/local/etc/rc.d/clamav-clamd start" stop program = "/usr/local/etc/rc.d/clamav-clamd stop" if failed unixsocket /usr/local/etc/rc.d/clamav-clamd then restart if 5 restarts within 5 cycles then timeout Honestly, I really don't know much of what's going on here. My host who helped me get the box set up basically installed clamav, but doesn't offer this kind of detail in supporting me, so I'm left to figure this stuff out on my own as I own the box, but they provide the isp service. Is there anyone who can help me troubleshoot this? Thanks for your help in advance.

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• MRTG Monitoring of Disk

  - by Antitribu

  I am trying to monitor Disk usage over SNMP using MRTG on CentOS5.2. I'm open to any suggestions as to the best way to achieve this (I would also like to do other metrics like CPU). Please don't assume I know anything about MRTG. I am using the following config: LoadMIBs: /usr/share/snmp/mibs/UCD-SNMP-MIB.txt,/usr/share/snmp/mibs/TCP-MIB.txt workdir: /var/www/html/mrtg/temp/ # # Disk Usage Monitoring # Target[servername.]: dskPercent.0&dskPercent.0:[email protected] Title[servername.]: / on servername routers.cgi*Desc[servername.]: / on servername routers.cgi*ShortDesc[servername.]: / MaxBytes[servername.]: 100 AbsMax[servername.]: 100 Options[servername.]: growright,nopercent,gauge YLegend[servername.]: used disk space ShortLegend[servername.]: % used Legend1[servername.]: usage Legend2[servername.]: usage Legend3[servername.]: peak usage Legend4[servername.]: peak usage LegendI[servername.]: usage LegendO[servername.]: usage routers.cgi*Icon[servername.]: disk-sm.gif routers.cgi*Options[servername.]: noo,nomax,noabsmax Unscaled[servername.]: dwmy I receive the errors: Unknown SNMP var dskPercent.0 at /usr/bin/mrtg line 2035 Unknown SNMP var dskPercent.0 at /usr/bin/mrtg line 2035 From forum surfing etc the suggestion is to use the fully qualified OIDs, I'd like to avoid this (for readability). So essentially I'm wondering where can I find a mib file compatible with mrtg for it's reference or a working config file.

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