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  • Windows Share authentication from Active Directory Linux login

    - by Kenny
    Hi, I'm using Active Directory to log into RHEL. To do this, I followed the steps outlined here: http://www.markwilson.co.uk/blog/2007/05/using-active-directory-to-authenticate-users-on-a-linux-computer.htm I'd like to be able to read data from Windows Servers shared folders without being prompted for a password. On Windows I log into an AD domain, and when I access windows file shares on a server on the LAN (also part of the AD domain) my I can just access them with no authentication step. I've used SMBclient on Linux to access these shares, but it asks for my password. I would like to be able to script access to the data on the shares, but I can't if there's a password prompt in the way. Well, I could, but it's not how I want to do it. Now, since I'm logged in using my active directory username & password, can't I just access the shares without jumping that extra hoop? I know I can mount the share using something like: //192.168.0.5/share /mnt/windows cifs auto,username=steve,password=secret,rw 0 0 but access will depend who is logged in... each user logging in should have their own unique AD access privelages. Thanks for reading!

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  • PC only boots from Linux-based media and won't boot from DOS-based media

    - by xolstice
    I have this problem where the PC only seems to boot from a floppy disk or CD if it was created as a Linux-based bootable media. If it was created as a DOS-based bootable media the system just freezes at the starting point of the boot process. I originally asked this under question 139515 for CD booting only, and based on the given answers, I was under the impression the problem was with the CD-ROM drive; however, I have since installed a newly purchased CD-ROM drive and the same freezing occurs. This then made me try the DOS bootable floppy disk approach and I was quite surprised that it exhibited the same freezing problem. I then tried try a Linux bootable floppy and everything booted from it without any issues. As I mentioned in my original question, the PC was booting just fine from the DOS-based bootable CD, and then it suddenly decides to pull this freezing stunt. I can't remember if I changed anything in the BIOS settings that may I have caused the problem, but I am wondering if that could be the case - it is currently using the Award Module BIOS v4.60PGMA. Can anyone help?

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  • The RTL8111/8168B NIC under Linux and the r8168 driver

    - by nik
    So I've got one of the infamous R8168 Realtek ethernet NIC, which have some problems under Linux. After some research, I found out I had to use the r8168 driver for this card (and not the r8169 which still loads when nothing else is available), which I did. So now everything works fine... Sort of. My download and upload rates are more than halved compared to what I should get. When I test (with eg. speedtest) I get something like 20M (often 15M) in download and 30M in upload, but if I test under Windows (everything is otherwise identical: same ethernet cable, same connection, at the same time of the day (well 5 min apart)...), I get 50M upload/download (which is what I expect). Where can it come from? Here's some info: ~ # lspci [...] 06:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 06) ~ # modinfo r8168 filename: /lib/modules/3.2.1-gentoo-r2/net/r8168.ko version: 8.027.00-NAPI license: GPL description: RealTek RTL-8168 Gigabit Ethernet driver author: Realtek and the Linux r8168 crew <[email protected]> srcversion: 0A6E9F1D4E8E51DE4B6BEE3 alias: pci:v00001186d00004300sv00001186sd00004B10bc*sc*i* alias: pci:v000010ECd00008168sv*sd*bc*sc*i* depends: vermagic: 3.2.1-gentoo-r2 SMP mod_unload [...] ~ # mii-tool -v eth0: negotiated 100baseTx-HD, link ok product info: vendor 00:07:32, model 17 rev 4 basic mode: autonegotiation enabled basic status: autonegotiation complete, link ok capabilities: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD advertising: 100baseTx-HD 10baseT-FD 10baseT-HD flow-control link partner: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD

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  • linux + create host file from CSV file by sed or awk or perl

    - by yael
    I have the following CSV file this file defined which Linux machine exist in the system and there ip's my target is to create host file from this file please advice how to create host file as example 1 from my CSV file ( I need to match the IP address from CSV file and put it on the first field of the host file , then match the LINUX name and locate this name in the sec field – as example 1 ) remark - should be performed by sed or awk or perl .. , I need to write the solution in my bash script CSV file , machine , VM-LINUX1 , SZ , Phy , 10.213.158.18 , PROXY , VM-LINUX2 , SZ , 10.213.158.19 , OLD HW , VM-LINUX3 , SZ , 10.213.158.20 , , VM-LINUX4 , SZ , Phy , 10.213.158.21 , , VM-LINUX5 , SZ , Phy , OUT , EXT , LAN3 , 10.213.158.22 , INTERNAL , VM-LINUX6 , SZ , Phy , 10.213.158.23 , , server , new HW , VM-LINUX7 , SZ , Phy , 10.213.158.24 , OUT, LAN3 , VM-LINUX8 , SZ , 10.213.158.25 , OLD HW , machine , VM-LINUX9 , SZ , Phy , INT , 10.213.158.26 , LAN2, AN45, , VM-LINUX10 , SZ , Phy , 10.213.158.27 , , VM-LINUX11 , SZ , Phy , LAN5 , 10.213.158.28 , example 1 ( host file ) 10.213.158.18 VM-LINUX1 10.213.158.19 VM-LINUX2 10.213.158.20 VM-LINUX3 10.213.158.21 VM-LINUX4 10.213.158.22 VM-LINUX5 10.213.158.23 VM-LINUX6 10.213.158.24 VM-LINUX7 10.213.158.25 VM-LINUX8 10.213.158.26 VM-LINUX9 10.213.158.27 VM-LINUX10 10.213.158.25 VM-MACHINE8 10.213.158.26 STAR9 10.213.158.27 TOP10 10.213.158.28 SERVER11

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  • who has files open on a linux server

    - by Robert
    I have the fairly common task of finding who has files open on our Linux (Ubuntu ) file server in our Windows environment. We use Samba on the network and I use Putty from my workstation to establish a shell window to run bash scripts. I have been using something like this to find what files are open: (this returns a list of process ids with each open file) Robert:$ sudo lsof | grep "/srv/office/some/folder" Then, I follow up with something like this to show who owns the process: (this returns the name of the machine on the network using the IP4 protocol who owns the process) Robert:$ sudo lsof -p 27295 | grep "IPv4" Now I know the windows client who has a file open and can take action from there. As you can tell this is not difficult but time consuming. I would prefer to have a windows application I can run that would just give me what I want. So, I have been thinking about creating some process I can run on Linux that listens on a port and then returns a clean list of all open files with the IP address of the host who has the file open. Then, a small windows client application that can send the request on the port. It seems like this should be a very common need but I can not find anything like this that has been done before. Any suggestions?

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  • Use one NIC to create multiple interfaces for Linux KVM

    - by Phanto
    I am working on a thesis research project, and I am having some difficulty figuring out how to make one NIC spawn several "bridge" interfaces such that each KVM VM can be seen on the local network. I am very new to KVM, and am still exploring what it can do. Below is the scenario that I am attempting to make (on a CentOS/RHEL 6 system): Linux KVM Host has 1 NIC (eth0) connected to a switch. Create multiple "bridge" or equivalent interfaces that are spawned off of eth0 that would provide a unique IP for each VM. This is so that each VM can communicate with other hosts on the network, and that other hosts on the network can communicate with the VM. IMPORTANT: I would like iptables on the KVM host to be able to manipulate/control/restrict the traffic that would be sent on those "bridge" interfaces. I would like to create a minimum of three VM's, each using their own unique "bridge" interfaces. I have previously made a br0 interface off of eth0, but unfortunately, I am unable to add any more to it. It appears that you can only bridge 1 interface to the NIC. I would like to bridge many to one. Would a tap device be able to do this? If so, how would it be set up? Effectively, I am attempting to replicate what can easily be created with VirtualBox on Windows, where each VM is given a "bridged" interface, and can live on the network. I want to achieve this very same thing with Linux KVM. Thank You EDIT: To be more descriptive, I want to achieve something that looks like this: This can be found on this page: http://en.gentoo-wiki.com/wiki/KVM#Networking_2 HOST +---------------+ | | KVM GUEST1 | | +--------------+ | +------+ | | | LAN ---+--- eth0 | +--+---+---- nic0 | KVM GUEST2 | | tap0----+ | |192.168.1.13 | +--------------+ | | tap1----+ | +--------------+ | | | +------+ | | | | | br0 +--+----------------------+---- nic0 | |192.168.1.12 | |192.168.1.14 | +---------------+ +--------------+

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  • AWS Linux EC2: yum won't run with plugins

    - by Patrick
    Short Version: yum commands on my Amazon Linux EC2 AMI only work with --noplugins. Long Version: A couple of days ago, I ran yum update at the behest of the SSH Login MoTD telling me I had updates to install. About midway through the update (specifically while updating the kernel), the update abruptly ended (79 of 138 items completed). The website I host on EC2 got weird for a few minutes, but eventually seemed to stabilize back out (maybe EC2 restarted itself?), and I didn't have further issues (other than MySQL started running out of memory, but I think that's probably unrelated to this). Today, I went to install gcc-c++ (with yum install gcc-c++). When I did, I got the following message: Loaded plugins: priorities, security, update-motd, upgrade-helper Config error: Command "updateinfo" already defined and I get that for any command I can think to run using yum. However, If I throw in the --noplugins flag, then magically it seems to work. To be clear, when I installed a different package a week ago, it worked totally correctly, so the yum update is the only thing I can think of that changed. I could find nothing on Google with regard to "updateinfo" already defined (with and without quotes). I tried running yum update --noplugins which spit out a message telling me that I should have run yum-complete-transaction instead, but proceeded to try to update something on its own. When that completed, I tried yum-complete-transaction but that gave me a message about the transactions not lining up correctly, so it removed the old transaction (Probably since I should have completed the first transaction before trying to update again, if I had known). Based on the SF question "Linux EC2 Broken Yum", I've also tried yum clean all --noplugins (fails the same with plugins) which just gives me Cleaning repos: amzn-main amzn-updates rpmforge Cleaning up everything I also tried package-cleanup --problems Loaded plugins: priorities, update-motd, upgrade-helper No Problems Found and package-cleanup --dupes Gives a lot of dupes, so I pasted them here: http://pastebin.com/VVFQEkTT instead of inline. At this point, I'm not sure what else there even is to check.

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  • Linux RFID reader HID Device not matching driver

    - by blietaer
    Hello, I got a RFID reader (GigaTek PCR330A-00) that is meant to be recognized under linux/windows as a (Human Interface Device) keyboard/USB. I hate to say this but it is working as a charm under Win7 but not "really" under Linux. Under Debian-like distros (x/k/Ubuntu, Debian,..), or Gentoo, or... I just can't have the device working at all: the device scan well (it has its USB 5V, so it is happy/beeping/blinking) something happened in the dmesg, but no immediate screen display of the RFID Tag code as expected (and seen under win7) Support is claiming it is ok under RHEL or SLED "enterprises" distros... and I must admit I saw it working under a RHEL4... I tried stealing the driver but did not succeed having my reader working... My question is thus double: 1./ How can I hack the kernel to add support to my device (simply register PID/VID?) ? 2./ What is different at all in a "enterprise" proprietary distro? how can I re-use it? Thank you for any hint/help. Cheers,

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  • Synchronizing files between Linux servers, through FTP

    - by Daniel Magliola
    I have the following configuration of servers: 1 central linux server, a VPS 8 satellite linux servers, "crappy shared hostings" I have a bunch of files that I need to have in all servers. Right now i'm copying them everywhere manually, but I want to be able to copy them to the central server, and then have a scheduled process that runs every now and then and synchronizes them (only outwardly, no need to try to find "new" files in the satellite servers). There are a couple of catches though: I can't have any custom software in the satellite servers, or do strange command line things that'll auto connect to them and send the files directly. I know this is the way these kinds of things are normally done, but the satellite servers are crappy shared hosting ones where I have absolutely no control over anything. I need to send the files over FTP I also need to have, in my central server, a list of the files that are available in each of the satellite servers, to make sure they are ready before I send traffic to them. If I were to do this manually, the steps would be: get the list of files in a satellite server compare to my own, and send the files that are missing get the list of files again, and store it in my central database. I'd like to know what tools are out there that can alleviate as much of this as possible, first the syncing, and then the "getting the list of files available in the other server". I'm going to be doing everything from PHP, not sure if there are good tools to "use FTP from PHP", which i'm pretty sure i'll have to do for step 3 at least. Thanks in advance for any ideas! Daniel

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  • Problems mounting HPUX LVM+VXFS filesystem on Linux

    - by golimar
    I have a physical disk from a HPUX system that I need to access from a Debian Linux for ia64 system. From the hpux-lvm-tools project I have the tools to access the HPUX LVMs (Linux LVM has a different format) and I also have the freevxfs driver. I know beforehand that the disk has three partitions, and that the biggest one contains LVM volumes, and some of those are VxFS filesystems. I can see the partitions: # cat /proc/partitions major minor #blocks name 8 32 143374744 sdc 8 33 512000 sdc1 8 34 142452736 sdc2 8 35 409600 sdc3 It finds a VG in one of the disk partitions: # ./vgscan_hpux On /dev/sdc2 - vg1328874723 # ./pvdisplay_hpux /dev/sdc2 PV General Information ---------------------- VG Creation Time Fri Feb 10 12:52:03 2012 Physical Volume ID 1766760336 1328874723 Volume Group ID 1766760336 1328874723 Physical Volumes in VG 1766760336 1328874723 VG Actication Mode 0 - LOCAL PE Size 64 MBs Lvol sizes ---------- lvol1 - 8 Extents - 512 MBs lvol2 - 192 Extents - 12288 MBs lvol3 - 16 Extents - 1024 MBs ... lvol21 - 13 Extents - 832 MBs lvol22 - 224 Extents - 14336 MBs lvol23 - 16 Extents - 1024 MBs Then I activate that VG and some new devices appear in my system: # ./pvactivate_hpux /dev/sdc2 VG vg1328874723 Activated succesfully with 23 lvols. # # ll /dev/mapper/ total 0 crw------- 1 root root 10, 59 Nov 26 16:08 control lrwxrwxrwx 1 root root 7 Nov 26 16:38 vg1328874723-lvol1 -> ../dm-0 lrwxrwxrwx 1 root root 7 Nov 26 16:38 vg1328874723-lvol10 -> ../dm-9 ... lrwxrwxrwx 1 root root 7 Nov 26 16:38 vg1328874723-lvol8 -> ../dm-7 lrwxrwxrwx 1 root root 7 Nov 26 16:38 vg1328874723-lvol9 -> ../dm-8 But: # mount /dev/mapper/vg1328874723-lvol18 /mnt/tmp mount: you must specify the filesystem type # mount -t vxfs /dev/mapper/vg1328874723-lvol18 /mnt/tmp mount: wrong fs type, bad option, bad superblock on /dev/mapper/vg1328874723-lvol18, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so # lsmod |grep vxfs freevxfs 23905 0 I also tried to identify the raw data with the file command and it just says 'data': # file -s /dev/mapper/vg1328874723-lvol18 /dev/mapper/vg1328874723-lvol18: symbolic link to `../dm-17' # file -s /dev/dm-17 /dev/dm-17: data # Any clues?

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  • AVCHD MTS h264 1080p file with choppy playback in Linux

    - by marc
    When I'm trying play video files from my camera: Seems stream 0 codec frame rate differs from container frame rate: 50.00 (50/1) -> 50.00 (50/1) Input #0, mpegts, from '00027.MTS': Duration: 00:00:38.88, start: 2.884289, bitrate: 16945 kb/s Program 1 Stream #0.0[0x1011]: Video: h264 (High), yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 50 tbc Stream #0.1[0x1100]: Audio: ac3, 48000 Hz, stereo, s16, 256 kb/s … on my Linux computer (Ubuntu 12.04), I get choppy playback. It's completly unusable... I tried: Totem VLC mplayer The result is always same issue. I sent the same video file to a friend who has ubuntu 10.04 to test, and he also has the same issue. He has Windows 7, and confirms that on Windows, the video work well. I have an Intel® Core™2 CPU 6300 @ 1.86GHz × 2 with GF 9600 GT, with closed NVIDIA drivers. This is not any kind of issue with big files playing slow from an HDD issue. I have an SSD drive! I spent the last days and nights, trying hundreds of commands for ffmpeg, handbrake, mencoder... Any of them won't let me create a file with enough quality. I downloaded few movies from YouTube in 1080p, and playback worked well without any big pixels and choppiness. I would like have highest possible quality, I will put following files onto a Blu-ray disk so I don't need to compress them to get a smaller size. I just want smoth playback on my Linux box. On Windows, the same file is working well.

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  • Unable to compile netmap on Fedora 32 bit

    - by John Elf
    This is the error everytime I try to install netmap: Can someone let me know how to isntall the same on e1000e or ixgbe. I have kernel header and source installed. [root@localhost e1000]# make KSRC=/usr/src/kernels/2.6.35.6-45.fc14.i686/ make -C /usr/src/kernels/2.6.35.6-45.fc14.i686/ M=/media/sf_Shared/netmap-linux/net/e1000 modules make[1]: Entering directory /usr/src/kernels/2.6.35.6-45.fc14.i686' CC [M] /media/sf_Shared/netmap-linux/net/e1000/e1000_main.o /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c: In function ‘e1000_setup_tx_resources’: /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c:1485:2: error: implicit declaration of function ‘vzalloc’ /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c:1485:20: warning: assignment makes pointer from integer without a cast /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c: In function ‘e1000_setup_rx_resources’: /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c:1680:20: warning: assignment makes pointer from integer without a cast /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c: In function ‘e1000_tx_csum’: /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c:2780:2: error: implicit declaration of function ‘skb_checksum_start_offset’ /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c: In function ‘e1000_rx_checksum’: /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c:3689:2: error: implicit declaration of function ‘skb_checksum_none_assert’ /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c: In function ‘e1000_restore_vlan’: /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c:4617:23: error: ‘VLAN_N_VID’ undeclared (first use in this function) /media/sf_Shared/netmap-linux/net/e1000/e1000_main.c:4617:23: note: each undeclared identifier is reported only once for each function it appears in make[2]: *** [/media/sf_Shared/netmap-linux/net/e1000/e1000_main.o] Error 1 make[1]: *** [_module_/media/sf_Shared/netmap-linux/net/e1000] Error 2 make[1]: Leaving directory/usr/src/kernels/2.6.35.6-45.fc14.i686' make: * [all] Error 2

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  • How to install Red Hat Enterprise Linux on Apple Macbook Pro MacBookPro4,1

    - by Todd V. Rovito
    I have a one year old Mac Book Pro that I am trying to get RHEL 5.4 installed on via bootcamp. No matter what I do I can't get the installer to boot. I have tried multiple DVD's and even verified the install works on a new Mac Book Pro. Most of the time the installer simply locks up. I usually use Linux text with all-generic-ide on the boot line. I removed the ide parameter and I just used linux text. The results I get are that a bunch of kernel messages appear then the background turns blue and a thin text box pops up saying its loading ata..... something it disappears too fast for me to read. Then the machine freezes. I pressed the alt function keys to see if I could look at the system log, here is what it says: Alt-f3 says "trying to mount CD device hda" Alt-f4 says status error: hda: lastFailedSense Hda: Failed opcode was: unknown Hda: Lost interrupt Hda: Drive not ready for command Ide-cd: command 0x3 timed out Above this junk it looks like it found the partition because it knew it was 20 GB and listed as /dev/sda3. I think it has something to do with the CD drive, is that possible? Thanks again for the support. PS I posted in the apple support forums ( Apple.com Support Discussions Boot Camp Installation and Storage) and didn't get an answer.

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  • PHP Output buffer flush issue on Apache/Linux

    - by Iiro Vaahtojärvi
    Hi, I'm running into issues with the PHP output buffer flushing on my Linux web server. The output buffer is maintained correctly and all the right data is pushed to it in my code, but the usual flushing mechanisms won't flush it to the browser. I have tried everything posted here: http://php.net/manual/en/function.flush.php but no success so far. I got a small script from php.net to test it: <?php ob_start(); for($i=0;$i<70;$i++) { echo 'printing...<br />'; ob_get_flush(); flush(); usleep(300000); } ?> This should print "printing..." to the browser 70 times, one line every three seconds. This works fine on my other testing environment which is based on Windows (still using apache, XAMPP package), but on my Linux server it doesn't. It waits for the script to finish before giving anything to the browser, basically ignoring the whole flush command. If anyone has experienced this before or knows of anything that could help (be it server configuration or adjustment to code) it would be greatly appreciated!

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  • Postfix spool on ext3 optimiziations in >=linux-2.6.34 days

    - by Luke404
    Given the very specific nature of the subject (we're not talking about mailboxes, just the spool; we're not talking about other filesystems, just ext3; and so on...) and the maturity of the softwares involved (linux kernel, ext3fs, postfix) I'd think there should be a more or less agreed on set of best practices to filesystem related tuning. I'm trying to get a roundup of them: data=journal became the default in recent kernels (somewhere around 2.6.30 IIRC) so we should be ok with that Wietse Venema says atime must be on, but Postfix documentation recommendsnoatime while talking about the Incoming Queue. Does that mean that postfix needs atime on just for some queue directories and will benefit from noatime on the others? can we use noatime if we just don't use ETRN? filesystem can be mounted nodev,noexec,nosuid - no* won't prevent you from setting attributes (postfix uses exec attr) they just won't have any effect (we don't run anything from the spool) the fsync() issue cited by Wietse and/or the chattr -S are probably linked to sync/async options of ext3fs but I do not understand them enough. Mouting the filesystem with async option is equivalent to chattr -R -S the whole fs? Seems like it will increase performance, but will that pose a risk of "loss of mail after a system crash" or is it really "safe on /var/spool/postfix" ? would you tune anything else on postfix-2.6.x to work better on ext3 or do you leave defaults everywhere? is there a "best" linux I/O scheduler for this kind of workload (namely CFQ or deadline?) or that's something that will vary too much based on hardware configuration? would you tune anything else in the filesystem or in the kernel? anything else? References: Postfix Performance here on SF Postfix documentation about the Incoming Queue Wietse Venema in Best file system on [email protected] here Postfix and ext3 on [email protected] here and there

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  • How do I use a Minitel terminal as a linux dumb terminal

    - by Pawz
    I recently purchased a US version of the Alcatel Minitel terminal. I think it's a 1B version. Pictures of it here: I tried connecting a null modem to the 25 pin port on the back and plugging it into a linux box running agetty but I couldn't get it to show any signs of being connected. I used Google Translate to translate this document into English: http://mirabellug.org/wikini/upload/Documentations_minitel.pdf As far as I can tell, you take it out of videotex mode by typing Fcnt-T A, then turn off local echo with Fcnt-T E, then set it to 4800 baud with Fcnt-P 4. I presume Fcnt refers to the "CTRL" key on my terminal. But I think I'm doing something wrong, because it doesn't look like it's recognising the keystrokes, because "Fcnt-T A" just prints the letter A to the screen, which is not what you'd expect a function key combo to do. Has anyone used these minitel terminals as a linux terminal, and if so, please can you share how to configure the minitel to run as a terminal ? Is the 25 pin plug even the correct port to use ? I read something online that indicated you're supposed to use the 5 pin DIN plug instead, is that right ? If so, what's the 25 pin plug for ? If I am supposed to use the DIN plug, does anyone know the pinouts so I can make a cable ?

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  • tcp msl timeout implementation in linux

    - by iamrohitbanga
    The following is given in the book TCP IP Illustrated by Stevens Quiet Time Concept The 2MSL wait provides protection against delayed segments from an earlier incarnation of a connection from being interpreted as part of a new connection that uses the same local and foreign IP addresses and port numbers. But this works only if a host with connections in the 2MSL wait does not crash. What if a host with ports in the 2MSL wait crashes, reboots within MSL seconds, and immediately establishes new connections using the same local and foreign IP addresses and port numbers corresponding to the local ports that were in the 2MSL wait before the crash? In this scenario, delayed segments from the connections that existed before the crash can be misinterpreted as belonging to the new connections created after the reboot. This can happen regardless of how the initial sequence number is chosen after the reboot. To protect against this scenario, RFC 793 states that TCP should not create any connections for MSL seconds after rebooting. This is called the quiet time Few implementations abide by this since most hosts take longer than MSL seconds to reboot after a crash. Do operating systems wait for 2MSL seconds now after a reboot before initiating a TCP connection. The boot times are also less these days. Although the ports and sequence numbers are random but is this wait implemented in Linux? Also RFC 793 says that this wait is not required if history is maintained. Does linux maintain any history of used sequence numbers for connections to handle this case?

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  • Enabling hardware acceleration and Xinerama for multi-monitor/multi-GPU in Linux

    - by mynameiscoffey
    My current setup is three monitors connected as follows (monitors listed from left to right): GPU0 (nVidia GTX 280): - Dell 2405FPW (1920x1200) - Dell U2410 (1920x1200) GPU1 (nVidia 210): - Dell 2405FPW (1920x1200) Works like a charm in Windows 7, not so much in Linux. I seem to only have three real options: Run all three monitors as a seperate X screen, I get hardware acceleration but as they are all independent X sessions I cannot move windows between them and can only have firefox open on one at any given time. Run the two on GPU0 in TwinView mode and have GPU1 as a seperate X screen. Same limitation as 1 but at least two monitors work together ok. I did have an issue where occasionally Linux saw both monitors on GPU0 as a single large monitor however. Enable Xinerama and have everything work as I want it to but hardware acceleration is gone and the display is Windows 95 style choppy. My ideal solution would be to have all screens working as they do under Xinerama without the limitation of having hardware acceleration disabled. I don't even care if that means rendering all three on GPU0 and somehow farming out the display of the third monitor to GPU1, whatever works. My question is this: is there any way to accomplish this? I don't feel like my use case is so out there that there shouldn't be at least some form of support (beyond the three limited options presented above), or is my best option going to be to just suck it up and pick up a better card to replace both that can handle three outputs by itself?

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  • Cannot resolve dependencies when trying to install gnome-libs or xscreensaver on linux

    - by Frank
    I am a linux noob and am trying to install ORacle10g on RHEL5 but am running into difficulties on the requirements stage. The only 2 packages I require is gnome-libs and xscreensaver. I have downloaded both: 'gnome-libs-1.4.1.2.90-44.1.i386.rpm 'xscreensaver-4.18-5.rhel4.11.i386.rpm' But when I try to install them I get dependency errors. I have been trawling sites and forums for 2 days now and am no closer to resolving this and continuing with my Oracle install. To pre-empt possible trouble-shooting questions, here is a list of the dependcies that could not be resolved: For gnome-libs: libdb.so.2(GLIBC_2.0) ORBit libdb.so.2 libllOP.so.0 libORBitCosNaming.so.0 libORBitutil.so.0 libORBit.so.0 libpng.so.2 And it says all the above is needed by package 1:gnome-libs-1.4.1.2.90-44.1.i386(/gnome-libs-1.4.1.2.90-44.1.i386) For xscreensaver: xloadimage is needed by package 1:xscreensaver-4.18-5.rhel4.11.i386(/xscreensaver-4.18-5.rhel4.11.i386) Sorry if I have explained this in a crap way - like I said - linux noob here. Any help with this would be great, its been a long 2 days so far - i need to get this resolved soon. Thanks

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  • Apache 2.2.21 installation on Linux 6 but got error while accessing in browser

    - by JRanjan
    I am very new to linux. I have install apache 2.2.21 on linux 6 platform. While i am using ./apachectl start or ./apachectl -k start command it shows that apache is started. But while i am trying to to access apache default page in any browser using " http://:8080 " it shows page cannot be displayed. Can any one help me on this issue ??????? Plz its urgent.. I am also enclosing the error_log file as below: error_log file [Thu Nov 24 08:57:23 2011] [notice] Apache/2.2.21 (Unix) DAV/2 configured -- resuming normal operations [Fri Nov 25 01:45:58 2011] [notice] caught SIGTERM, shutting down [Fri Nov 25 01:46:12 2011] [notice] Digest: generating secret for digest authentication ... [Fri Nov 25 01:46:12 2011] [notice] Digest: done [Fri Nov 25 01:46:13 2011] [notice] Apache/2.2.21 (Unix) DAV/2 configured -- resuming normal operations [Fri Nov 25 01:54:58 2011] [notice] caught SIGTERM, shutting down [Fri Nov 25 01:55:10 2011] [notice] Digest: generating secret for digest authentication ... [Fri Nov 25 01:55:10 2011] [notice] Digest: done [Fri Nov 25 01:55:11 2011] [notice] Apache/2.2.21 (Unix) DAV/2 configured -- resuming normal operations [Fri Nov 25 01:58:10 2011] [notice] caught SIGTERM, shutting down [Fri Nov 25 01:59:41 2011] [notice] Digest: generating secret for digest authentication ... [Fri Nov 25 01:59:41 2011] [notice] Digest: done [Fri Nov 25 01:59:42 2011] [notice] Apache/2.2.21 (Unix) DAV/2 configured -- resuming normal operations [Fri Nov 25 03:23:14 2011] [notice] caught SIGTERM, shutting down [Fri Nov 25 03:27:36 2011] [notice] Digest: generating secret for digest authentication ... [Fri Nov 25 03:27:36 2011] [notice] Digest: done [Fri Nov 25 03:27:37 2011] [notice] Apache/2.2.21 (Unix) DAV/2 configured -- resuming normal operations [Fri Nov 25 08:52:27 2011] [notice] caught SIGTERM, shutting down [Fri Nov 25 08:52:43 2011] [notice] Digest: generating secret for digest authentication ... [Fri Nov 25 08:52:43 2011] [notice] Digest: done [Fri Nov 25 08:52:44 2011] [notice] Apache/2.2.21 (Unix) DAV/2 configured -- resuming normal operations [Fri Nov 25 09:21:39 2011] [notice] caught SIGTERM, shutting down [Fri Nov 25 09:21:57 2011] [notice] Digest: generating secret for digest authentication ... [Fri Nov 25 09:21:57 2011] [notice] Digest: done [Fri Nov 25 09:21:58 2011] [notice] Apache/2.2.21 (Unix) DAV/2 configured -- resuming normal operations [Mon Nov 28 01:06:58 2011] [notice] caught SIGTERM, shutting down [Mon Nov 28 01:07:58 2011] [notice] Digest: generating secret for digest authentication ... [Mon Nov 28 01:07:58 2011] [notice] Digest: done [Mon Nov 28 01:07:59 2011] [notice] Apache/2.2.21 (Unix) DAV/2 configured -- resuming normal operations

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  • Fix Linux-made png file for use on Windows

    - by BGM
    There is a particular icon library that I really like. Now, I have downloaded the package that has the png files inside (I know the ico files are there, but I want the png files). However, about my Windows 7 computer tells me that about 1/3 of the png files are corrupt. I usually use XnView to view the files, and it won't display the "corrupt" files. I've tried other editors and viewers and I get the same issue. Now, the png package was originally designed for Linux to be an OS-icon-package for the entire system, so I figure the png files were built in Linux. So, is there a way I can "fix" the "corrupted" png files for my Windows 7 computer? Maybe when the files were created there was some bit that was off-colour or something? Any clues? [edit] I have read in this thread that the "corruption" could happen during the extraction process. I did all the extraction with 7-zip. It was a zip containing a tar. I will try another extractor, but I don't think it will make any difference.

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  • PC only boots from Linux-based media and won't boot from DOS-based media

    - by Xolstice
    I have this problem where the PC only seems to boot from a floppy disk or CD if it was created as a Linux-based bootable media. If it was created as a DOS-based bootable media the system just freezes at the starting point of the boot process. I originally asked this under question 139515 for CD booting only, and based on the given answers, I was under the impression the problem was with the CD-ROM drive; however, I have since installed a newly purchased CD-ROM drive and the same freezing occurs. This then made me try the DOS bootable floppy disk approach and I was quite surprised that it exhibited the same freezing problem. I then tried try a Linux bootable floppy and everything booted from it without any issues. As I mentioned in my original question, the PC was booting just fine from the DOS-based bootable CD, and then it suddenly decides to pull this freezing stunt. I can't remember if I changed anything in the BIOS settings that may I have caused the problem, but I am wondering if that could be the case - it is currently using the Award Module BIOS v4.60PGMA. Can anyone help?

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  • linux keeps disconnecting from wireless network

    - by Matteo Ceccarello
    I'm running Arch Linux on an Acer laptop and my wirless connection doesn't stay up. After a while it disconnects, and when I try to reconnect I get stuck with a "Waiting for authorization" message. I have to retry several times before getting the connection stay up for few minutes. This happens with both networkmanager and wicd. The strange thing is that the iMac that sits next to the laptop connects fine, and when I use my laptop within the university wireless network it works normally. How can I solve this problem? EDIT: I've tried to connect manually following the steps iwlist wlan0 scan wpa_supplicant -i wlan0 -c /etc/wpa_supplicant.conf dhcpcd wlan0 and it works, I can ping google. However, looking to wpa supplicant output I see that it keeps connecting and disconnecting. I'm using WPA2, and this seems to be a problem in authentication. EDIT 2: as pointed out in the answers I forgot to mention my hardware/software specifications: kernel: Linux 3.0-ARCH wireless card: # lspci | grep -i net 07:00.0 Network controller: Intel Corporation WiFi Link 5100 module used # lsmod | grep -i 80211 mac80211 216021 1 iwlagn I use a Netgear DGN1000 modem/router My dmseg output is shown here http://pastebin.com/8Tf7iage

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  • Compiling linux kernel, how much size is needed?

    - by ant2009
    Hello, I am have downloaded the newest most stable linux kernel 2.6.33.2 I thought I would test this using virtualbox. So I create a dynamically sized harddisk of 4gb. And installed CentOS 5.3 with just the minimum packages. I setup the make menuconfig with just the default settings. After that I ran make and got the following error: net/bluetooth/hci_sysfs.o: final close failed: No space left on device make[2]: *** [net/bluetooth/hci_sysfs.o] Error 1 make[1]: *** [net/bluetooth] Error 2 make: *** [net] Error 2 The amount of space I have left is: # df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup00-LogVol00 3.3G 3.3G 0 100% / /dev/hda1 99M 12M 82M 13% /boot tmpfs 125M 0 125M 0% /dev/shm My virtual size is 4gb, but the actual size is 3.5gb $ ls -hl total 7.5G -rw-------. 1 root root 3.5G 2010-04-13 14:08 LFS.vdi How much size should I give when compiling and installing a linux kernel? Is there any guidelines to follow when doing this? This is my first time, so just experimenting with this. Many thanks,

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  • Share Firefox/Thnderbird data between W7 and Linux Mint 12 in dual boot computer

    - by Albert
    I've just set up my laptop (where I had running only W7) with a dual boot to run Linux Mint 12 as well. I have a "Data" partition (apart from the required partitions for W7 and Linux) where I store pretty much everything that isn't software installations (music, videos, project files, etc). I seem to be able to access that NTFS partition totally fine from Mint (like I've always done with W7), which is cool because I can access all that stuff regardless of which OS I'm using. I would like to know if it's possible (and how) to go one step further and share programs data between the two OS. One example would be my Firefox and Thunderbird data. For example, in Firefox share my bookmarks (and if I could share history, autocomplete and all that stuff, that would be awesome). In thunderbird, be able to share my mail and configuration, seeing the same inbox, folders, message rules, etc... So if I receive/send an email from W7 and later switch to Mint, I can see that email as it had been received/sent from Mint, and vice versa. Is this even possible? Or am I asking for too much convenience? If it's possible, any clues on how to set it all up?

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