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  • Swap implication in Linux and way to increase it

    - by vimalnath
    I used top command to print this on Linux box: [root@localhost ~]# top top - 23:38:38 up 361 days, 12:16, 2 users, load average: 0.09, 0.06, 0.01 Tasks: 129 total, 2 running, 126 sleeping, 1 stopped, 0 zombie Cpu(s): 0.0% us, 0.2% sy, 0.0% ni, 96.5% id, 3.4% wa, 0.0% hi, 0.0% si Mem: 2074712k total, 1996948k used, 77764k free, 16632k buffers Swap: 1052248k total, 1052248k used, 0k free, 331540k cached I am not sure what Swap:0k free means in the last line. Is this normal behavior for a linux box to have value of 0 Thanks

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  • cygwin åäö in emacs

    - by starcorn
    Hey I been bugging with this problem for some hours now. And I couldn't find the answer on google so I try it here. The problem is that when I run emacs in cygwin in -nw mode characters like åäö doesn't come out normally. However it is perfectly normal when I type those character in mintty terminal. The answer that I found on google is that I should type M-x standard-display-european however emacs doesn't have that option. It only found standard-display-cyrillic-translit

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  • Remote users on domain share

    - by user19039
    I am trying to share a domain share so only a specific machine with a specific user can connect. I have tried all the normal ways of actually adding the computer to the domain and then using its unc to map a user but to no avail. Is this possible? How do you do this?

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  • Replicated filesystem and EC2 MySQL

    - by El Yobo
    I'm currently investigating migrating our infrastructure over to run on Amazon's EC2 and am trying to figure out the best way to set up a MySQL service. I'm leaning towards running our own MySQL instances, rather than going with Amazon's RDS, but am still considering the best approach for performance and cost on the instance itself. In order to have persistent data, the MySQL data needs to be on an EBS volume (with some form of striped RAID, e.g. RAID0 or RAID10) to improve persistence. However, EBS IO is limited by the network interface (gigabit, so a theoretical maximum of 128 MB/s), while the ephemeral volumes have no such problem. I did see a suggestion for running two MySQL servers on an instance, with a master running on the ephemeral disk (which we would also RAID) and a slave storing changes to an EBS volume, but this has some additional overhead and complexity (two servers). What I was imagining is using some form of replicated file system such that I could have a filesystem on top of a RAID0 of ephemeral volumes to maximise performance all changes from the above immediately replicated to another RAID1 volume backed by multiple EBS volumes to ensure no data loss The advantages of this would be best possible IO performance for the DB server; no network delay in IO decreased IO on EBS volumes (as all read IO will be done on the ephemeral volumes) so decreased cost good data security, as it's backed onto redundant EBS volumes However, I haven't seen an appropriate system to replicate all changes from one volume to the other; is there a filesystem, or any other approach, which will do this? The distributed file systems, e.g. GlusterFS, DRBD etc seem to focus on replicating disks between servers, can they be set up to do what I'm interested in here? I also haven't seen anything about other's taking this approach. Do I have a solution in need of a problem here (i.e. is performance good enough, so this whole idea is redundant)? Is there some flaw in the plan?

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  • How should I interpret site analytics with 11 pageviews in an 3 second visit?

    - by Juank
    I'm using google analytics and recently i've noticed some weird trends going on. I have a lot of visits that last mere seconds but mark several page views... more than a normal human can see in that range of time. A specific case is that the only visitor from Ireland i've had until now recorded 11 pageviews in a 3 second visit. Are these crawlers? Shouldn't google analytics filter those out?

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  • Apache2 Worker Starting Tons of Processes

    - by karmic
    I am installed apache2-mpm-worker and left all config files default (I've never touched them much). Is it normal that when I restart apache there is at least 20 apache processes starting? Shouldn't it be just 2 like it says in the configuration? Also, my memory seems to grow very quickly until my machine crashes. I don't have any mods installed.

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  • Should I choose KVM/XEN over OpenVZ or use them together?

    - by Krystian
    I've got a dual xeon e5504 server, with [for now] only 8GB of ram. Storage is'n impressive either: 3x 146GB sas in raid5 + 500GB sata drives. Currently it works as a development server, but it's over speced for our needs and since our development methods changed through last 2 years we decided it will work as a production system for some of our applications + we would like to have a separate system for testing/research. Our apps are mainly web apps deployed on tomcats [plural as some of the apps require older versions] and connected to Postgres. I would like to have a production system, where only httpd+tomcat+db are setup and nothing else runs there. Sterile system. Apart from that, I would like a test system, where I can play with different JVM settings, deploy my test apps, play with tomcat/httpd settings and restart them without interfering with the production system. Apart from that, I would like to be able to play with different linux flavors, with newer kernels to test how they work etc. I know, this is not possible with OpenVZ and I would have to choose KVM for that. I am thinking about merging the two, and setting up a KVM to be able to work with different systems [linux only to be frank] + use openVZ to setup separate machines for my development needs. I would simply go with that, but reading here and there about the performance impact full virtualization has over containers and looking at the specs of my server makes me think twice about it. I don't want to loose too much performance, especially because of the nature of my apps [few JVMs running at the same time]. It will be my first time with virtualization, apart from using desktop virtualbox/vmserver. Although I am a fast learner I don't want to mess with the main system so much that it will break the production apps or make them crawl. Although they are more or less internal apps and they don't produce much load, they need to be stable. I've read, that KVM host is a normal linux installation and it allows to run normal processes on it. If that is so, does it allow to run openVZ as well? I mean... can I have KVM and OpenVZ running on the same system/kernel? Or do I have to setup another system to run OpenVZ containers? How much performance impact can this have for me? Will my hardware suffice? oh and one more thing... unfortunately I'm quite limited with the funds... I'm looking for a free solution only :/

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  • What does a green colored file name mean? [duplicate]

    - by user178744
    This question already has an answer here: What do green folders mean in Windows 7 Explorer? 2 answers I downloaded a .zip file the other day and extracted it using 7zip from my desktop to my laptop over my home network, when it finished, its filename and the filename of its contents was green. What does this mean, can i revert it to normal, has anything been modified and is there a list somewhere of color codes for windows file names.. ? (I can recall seeing blue somewhere before).

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  • QNAP (469L) with Debian: can't connect to router

    - by agtoever
    I've been running my QNAP 469L with Debian (Wheezy deb7u3) for a few months. Yesterday I upgraded the memory to 4 GB. The system boots fine, but since the upgrade, I'm not able to connect the server to my router (a TP-Link WR941ND). My configuration: The router runs a DHCP server (192.168.67.100 and up), with a preconfigured ip address for the QNAP (192.168.67.10). The router is on 192.168.67.1. As said, Debian is installed on the QNAP (which can be regarded as a normal computer). Networking hardware on the QNAP: Intel PRO/1000 Network Connection using the e1000e kernel module. This is what I have tried so far: Replace the network cable (tried 3 different cables on different router ports). Check for messages from the kernel: dmesg | grep eth. Besides the normal hardware messages I get a ADDRCONF(NETDEV_UP): eth0: link is not ready for each call to ifup. Manually restart the network sudo server networking restart Check sudo ifconfig (eth0 is up, but no ip addresses). Check the /etc/network/interfaces which has (besides the loopback device) an allow-hotplug eth0 and iface eth0 inet dhcp, which is afaik the default Debian configuration. Since the server has two ethernet ports, I checked if I'm using the right port (checked the hardware address that ifconfig reports for eth0 is the same as the hardware address that is in the preconfigured ip address for the server in the router. Do a manual sudo ifdown eth0 && sudo ifup eth0 with no results (but an extra ADDRCONF(NETDEV_UP): eth0: link is not ready in the kernel log) Do a dhcp request dhclient -v eth0: for about a minute requests are send (according to the terminal) and at the end I get a No DHCPOFFERS received. No working leases in persistent database - sleeping.. Check the router system log if DHCP requests are received. I see them for some devices (my Mac, my iPhone) but not from the QNAP. The log entry looks like: DHCPS:Recv REQUEST from 84:85:06:07:75:6A and then a DHCPS:Send ACK to 192.168.67.101. There are no records from the QNAP's hardware address. So the two error messages that I do get are: ADDRCONF(NETDEV_UP): eth0: link is not ready for every ifup and No DHCPOFFERS received. No working leases in persistent database - sleeping. for every DHCP call.

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  • Lightweight ad-blocker for firefox

    - by student
    On a old machine (512 MB RAM) I am currently running ubuntu jaunty and firefox 3.0.15. I tried the ad blocker addon add block plus but it eats lots of RAM (300 MB). Is high memory load of this add-on a bug, which is fixed in a newer version or just normal? If so, why is the memory usage so high? Is there another ad blocker add-on for firefox or another browser- add-on combination for linux (ubuntu jaunty) which uses significant less RAM?

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  • What the heck have I done to my Excel sheet (and how to undo it)??

    - by marc_s
    I have a lot of Excel sheets for all sorts of things - but none has ever acted up like this one here: This used to be a totally normal Excel 2007 sheet which I was able to resize, maximize etc. - but not anymore. What happened? What can I do to "undo" whatever I did to it. Any ideas?? I tried to share / undo sharing, I tried to protect / unprotect the sheet - nothing seems to work....

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  • IIS7 FTP7.5 and FXP

    - by cralexns
    I have a FTP7.5 on my Windows 2008 server and would like to use this for FXP, however regardless of the other server in question I can never complete a transfer. It always fails with this message: [L] 501-Server cannot accept argument. [L] Win32 error: The parameter is incorrect. [L] Error details: Client IP on the control channel didn't match the client IP on the data channel. I've tested normal use and it works fine, is there any setting I can change to allow for FXP?

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  • Are two periods allowed in the local-part of an email address?

    - by Mike B
    A third-party email gateway relay is refusing to process a message for an email address we're sending to. The address is in the format of [email protected] (note the two periods). Is this allowed by RFC guidelines? RFC 2822 seems to object to this in section 3.4.1: The locally interpreted string is either a quoted-string or a dot-atom. If the string can be represented as a dot-atom (that is, it contains no characters other than atext characters or "." surrounded by atext characters), then the dot-atom form SHOULD be used and the quoted-string form SHOULD NOT be used. Comments and folding white space SHOULD NOT be used around the "@" in the addr-spec. Furthermore, in that same section, it references this: addr-spec = local-part "@" domain local-part = dot-atom / quoted-string / obs-local-part I interpret this to mean that the localpart can have content separated by dots but there cannot be two successive dots, and it cannot start or end with a dot. That being said, I'm not familiar with dot-atom syntax so maybe I'm mistaken here. Can someone please confirm and explain?

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  • Enabling Squid delay pool eats up the entire memory

    - by Supratik
    I am using "squid-3.1.8-1.el5" in my CentOS 5 32 bit system. In normal condition Squid uses 85m - 90m, but when I enable the delay pool parameters the memory usage suddenly rise up 2GB. The memory keeps on increasing until the system is out of resource. The following are my delay pool settings: delay_pools 1 delay_class 1 1 delay_access 1 allow all delay_parameters 1 192000/192000 Is there anything I am missing here or is it a bug with Squid ?

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  • Windows 7 showing subfiles when saving files from internet?

    - by mezamorphic
    Within the last week, whenever I go to save a file from the internet when I save to "Documents" it doesn't show just what is in My Documents at the higher level, it shows all the contents of every sub-folder. I haven't changed any settings- how can I get this back to normal (so that files of sub-folders are not shown when saving)? I tried with both Chrome and IE so it's not the browser doing it. The problem seems to only happen with My Documents, no other folders like Downloads etc.

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  • On my Mac, under the 'Shared' folder it shows another computer in my house, am I hacked?

    - by user27449
    I didnt' setup any connection to another computer in my house (its a PC), and I just noticed under my 'Shared' folder in the file explorer on my Mac laptop I see the name of the PC. How could this have shown up when I didn't even try to connect to it before? Could I possibly be hacked or is this normal it just scanned our internal wireless network? I havent' setup any kind of network really, just have a wireless modem that other computers share.

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  • How to remove Unicode characters and/or convert OpenOffice spreadsheet cells to plaintext?

    - by gonzobrains
    I have an OpenOffice spreadsheet into which I occasionally copy/paste snippets from web pages. However, I need the file, as a whole, to be free of fancy formatting and non-ASCII text. Is tried highlighting cells and selecting "Default Formatting" but this still seems to keep extraneous characters even though it looks like normal text to the human eye. If this is not possible, is there a way to at least reveal the "raw" data within a cell so that I can manually strip it? Thanks, Jeff

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  • Stopping an unstoppable service

    - by Nicholas
    I have antivirus service (Kaspersky) that occasionally becomes unresponsive to the normal stop/stop gui interface provided by said vendor. I would like to find a way to kill the service for a restart without rebooting, however all attempts I have tried result in failure with an 'Access is Denied' error. These include: Services Control Panel (grayed out stop button) Task Manager Killing Process Explorer Killing command line net and sc stopping runas with domain admin using net stop Some details include: Machine: Windows Vista Service Type: 10 WIN32_OWN_PROCESS Service State: 4 Running (NOT_STOPPABLE, NOT_PAUSABLE, ACCEPTS_SHUTDOWN)

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  • I am getting unmountable_boot_volume STOP oxooooooED

    - by waterfalrain
    I read somewhere that the ultimate boot cd can diagnos computer problems in this case would this program help me get my windows xp back? When I turn on the screen and hit start windows normal or go to safe mode I get a flash of the win xp logo and then it goes to this error page. Can you tell from this message is it a hardware or software issue?

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  • I am getting unmountable_boot_volume STOP oxooooooED

    - by waterfalrain
    I read somewhere that the ultimate boot cd can diagnos computer problems in this case would this program help me get my windows xp back? When I turn on the screen and hit start windows normal or go to safe mode I get a flash of the win xp logo and then it goes to this error page. Can you tell from this message is it a hardware or software issue?

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