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• Linux WD30EZRX WD Green HDD & Blacx Duet 5G Usb

  - by Adam

  I have connected up an WD30EZRX WD Green HDD to a Thermaltake Blacx Duet 5G USB dock in Ubuntu 12.04. Every thing seems fine except when the HDD idles it seems to have error ls: reading directory .: Input/output error after a while and is only fixed by unmounting and remounting the drive as root. I have the following line in /etc/fstab UUID=AAF670E9F670B6E3 /media/3TB ntfs defaults,user,auto 0 0 I have noticed that it seems to go between /dev/sdc2 and /dev/sdd2 devices on remount. I did copy 1TB last night without issue in 1 sitting. But after x mins of idle it has remount issue. Any tips/suggestions on how to proceed would be appreciated. Spent most of the night googling and all its done is made me sad. Edit (tried as suggested): root@mediaserver:/media/3TB# sudo hdparm -B 255 -S 253 /dev/sdd2 /dev/sdd2: setting Advanced Power Management level to disabled HDIO_DRIVE_CMD failed: Input/output error setting standby to 253 (vendor-specific) APM_level = not supported Seems as if that didn't help with this particular drive.

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• configure Heartbeat on Centos Linux - error message

  - by Elad Dotan

  I installed Heartbeat on my Centos Linux and it seems to partially work..but I'm trying to monitor a service with no success. only when I reboot the main server the backup server takes over. in the logs I get : heartbeat[30476]: 2012/03/20_18:51:57 WARN: string2msg_ll: node [node1] failed authentication heartbeat[30476]: 2012/03/20_18:51:58 WARN: string2msg_ll: node [node02] failed authentication the authkeys is identical (copied from one to another). this is my ha.cf: logfile /var/log/ha-log logfacility local0 keepalive 2 deadtime 30 initdead 120 bcast eth0 udpport 694 auto_failback on node server01.com node server02.com haresources : server01.com 38.108.117.3 aim chat any idea how to fix the problem so if a service stops the other server take over Thanks! E.

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• rpd over https using a linux client

  - by Nils

  My employer switched from vpn and rdp to using what our admin calls "rdp over https". Since that switch I find myself unable to connect to the "new" rdp server. I think the progress is as follows: A rdp gateway-server is connected via tls the requested sever (different from the gateway-server) is then connected through the tls connection. In windows mstsc-settings the server name is the "internal network name" of the machine I wish to connect. And on the last tab (in German it is called "leistung" - could be activity) I go to the "connection from everywhere" settings and set the gateway-server under gateway-server. Now: Is there any way to use this scenario under linux (apart from a virtual machine running Windows)? I am interested in free ideas (e.g. is it possible to create a tls tunnel and connect through that using freerdp/rdesktop?) non-free ideas. As long as they work I'll worry about the costs later. Free ideas would be better :-)

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• installing linux on a mac

  - by Ahmet vardar

  Hi, i have mac pro and i wanted to install debian on it but i guess i have problem now. i have windows 7 installed on bootcamp partition, before i started installing linux, i created a partition size of 75 gb then i restarted mac and boot it from debian dvd. then i divided that 75 gb to 2 partitions, one is 600 mb freespace other is ext3 formatted. i installed debian (but it just used 1 dvd even though i got 5 dvd downloaded) then mac restarted. but now i cannot even see windows on bootlist. it just let me boot in mac os x now. how can i fix this? thanks

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• Linux stretch cluster: MD replication, DRBD or Veritas?

  - by PieterB

  For the moment there's a lot of choices for setting up a Linux cluster. For cluster manager: you can use Red Hat Cluster manager, Pacemaker or Veritas Cluster Server. The first one has the most momentum, the second one comes by default with RH subscriptions and the last one is very expensive and has a very good reputation ;-) For storage: - You can replicate LUN's using software raid / md device - You can use the network using DRBD replication, which offers a bit more flexibility - You can use Veritas Storage Foundation technology to talk to your SANs replication technology. Anyone has any recommandations or experience with these technologies?

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• How to document linux server configuration?

  - by Margaret Thorpe

  Hi, I have about 20 linux servers which I need to document the configuration of. I do not mean the detailed configuration of services, but rather user accounts, databases, databases accounts, ip addresses, physical location, SSH port etc. etc. I know all this data is stored in config files, but I want to centralize it all. I am considering just creating a spreadsheet to record this data, but was wondering if there is something better (perhaps a small php/mysql app) which would be more structured and complete than a hacked together spreadsheet. What do you use?

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• VAIO as a Linux based netbook

  - by Noufal Ibrahim

  I'm planning to refresh my laptop. I've been using a thinkpad T42 for a long time and run Ubuntu on it. I'm planning to move to using a desktop for all my heavy work and getting a very light netbook style machine for mobile use. I need a decent keyboard, good battery life and a display that's bright and responsive. I'm evaluating a couple of laptops including a mac but have never come across information about a Sony Vaio. Do any of the people have experience with the laptop? What are your opinions? Does it work fine with Linux? Is it tinkerable (a big problem with the macbooks). How's the build quality, how's the service?

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• Understanding top output in Linux

  - by Rayne

  Hi, I'm trying to determine the CPU usage of a program by looking at the output from Top in Linux. I understand that %us means userspace and %sy means system/kernel etc. But say I see 100%us. Does this mean that the CPU is really only doing useful work? What if a CPU is tied up waiting for resources that are not avaliable, or cache misses, would it also show up in the %us column, or any other column? Thank you.

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• Free, Linux-based rescue CD for Windows machines

  - by Adam Matan

  Hi, Too often, I'm being called to help a friend who screwed a Windows machine by some creative methods. Th usual remedy is backing up the hard drive contents and reinstalling. Right now, this is done by removing the defected hard drive to my machine. I figured out that using a rescue disk running some version of Linux might ease the process. I'm looking for: NTFS access Partition tools Large variety of drivers (Network, Hard drives, etc.) GUI and some rescue wizards a great plus. Any ideas? Adam

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• Simulating a low-bandwidth, high-latency network connection on Linux

  - by Justin L.

  I'd like to simulate a high-latency, low-bandwidth network connection on my Linux machine. Limiting bandwidth has been discussed before, e.g. here, but I can't find any posts which address limiting both bandwidth and latency. I can get either high latency or low bandwidth using tc. But I haven't been able to combine these into a single connection. In particular, the example rate control script here doesn't work for me: # tc qdisc add dev lo root handle 1:0 netem delay 100ms # tc qdisc add dev lo parent 1:1 handle 10: tbf rate 256kbit buffer 1600 limit 3000 RTNETLINK answers: Operation not supported How can I create a low-bandwidth, high-latency connection, using tc or any other readily-available tool?

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• Password manager solution: Symbian based phone and a Linux machine (Windows is not important, but wo

  - by Kent

  Hi, I currently use KeePassX to manage my passwords on my Linux (Xubuntu) machine. It's nice to have all the passwords encrypted, but sometimes I'd like to be able to tell a password when I'm on the run. Therefore I'm looking for a solution which I can synchronize with my phone. I have a Nokia N82 which is a Symbian OS v9.2 based phone for the S60 3rd Edition platform with Feature Pack 1. I like an open source solution if it's possible. In case it isn't I wouldn't mind paying for a good solution. If Windows may be added to the synchronization mix it's nice, but it's absolutely not a primary requirement (I don't even have any computer running Windows).

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• How to discern video details from Linux Live CD

  - by Chris Lieb

  I was having trouble getting X.Org to work with the video card in a recently aquired laptop, so I decided to try to probe around the configuration of a Linux Live CD to figure out how to set up my kernel. I chose the Sabayon 5.0 Live DVD because it was the only one that I could find that was the same or newer than the 2.6.32 kernel I have installed on the laptop right now. Of course, the DVD booted right into GNOME without issue, unlike the hangs and crashes that I had been getting. So, I want to figure out what kernel driver this Live DVD is currently using, but I don't know how to. hwinfo doesn't shed any light on the matter, and lspci -vnn doesn't list a driver for my video device, though both methods correctly identify that I have an Intel 855GM video processor. How can I find out this information?

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• File doesn't exist in Linux although it's located in Terminal

  - by Mazen Ayman

  I'm a bit new to unix/linux environment, but I have a small problem. I'm using "locate" to find the path of a file I need, it gives me the path for it, but the file doesn't exist in that path, like that: locate test1.txt /home/user/test files/text1.txt /home/user/test1.txt~ "test files" directory is where I was keeping the file and I copied it to the home directory once but I deleted it, no idea what it keeps telling me there is still a tmp file for it. it worth mentioning that I used the command: locate test1.txt~ |xargs -n1 rm to remove that tmp file, but maybe that what caused the problem. I tried to show hidden files, and check for temp files, didn't find it either. any clue what happened?

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• Questions about linux root file system.

  - by smwikipedia

  I read the manual page of the "mount" command, at it reads as below: All files accessible in a Unix system are arranged in one big tree, the file hierarchy, rooted at /. These files can be spread out over several devices. The mount command serves to attach the file system found on some device to the big file tree. My questions are: Where is this "big tree" located? Suppose I have 2 disks, if I mount them onto some point in the "big tree", does linux place some "special marks" in the mount point to indicate that these 2 "mount directories" are indeed seperate disks?

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• Linux stretch cluster: MD replication, DRBD or Veritas?

  - by PieterB

  For the moment there's a lot of choices for setting up a Linux cluster. For cluster manager: you can use Red Hat Cluster manager, Pacemaker or Veritas Cluster Server. The first one has the most momentum, the second one comes by default with RH subscriptions and the last one is very expensive and has a very good reputation ;-) For storage: - You can replicate LUN's using software raid / md device - You can use the network using DRBD replication, which offers a bit more flexibility - You can use Veritas Storage Foundation technology to talk to your SANs replication technology. Anyone has any recommandations or experience with these technologies?

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• Is there a stable Linux distro using btrfs?

  - by chrish

  I'm a big fan of ZFS on FreeBSD (I've been using it on my home server since before it got stable; bleeding edge, baby!) and I'd like to try out btrfs to see how that's evolving. Since it's still largely in development, none of the usual mainstream distros have btrfs as an option. I haven't used Linux in a bunch of years, so I don't really know what my best options are for giving btrfs a try. Requirements: easy to install btrfs supported without requiring me to rebuild the kernel Thanks!

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• Security issue on Linux with Netbeans

  - by WebDevHobo

  In order to edit some files in Netbeans, I had to do a chmod 777 on the parent-folder. Reason being that anything else would result in Netbeans not wanting to accept the folder, as it could not be written. Is there an other way to do this besides doing a chmod 777? I'm on Ubuntu 9.10, using Netbeans 6.7.1 And after that, I manually have to give each file the needed rights. There should be an easier way, I just don't know it. EDIT: I am running XAMPP and the files I'm trying to edit are in the htdocs folder. I'm running Netbeans as my local user account, which is how it starts if I have it run from the applications-menu.

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• Linux - use dhcp again to get IP

  - by Markus Orreilly

  I had statically set my ip in Linux using: sudo ifconfig eth0 192.168.blah.blah Now I want it to go back to using DHCP to assign the IP. How do I do that? This is what I see when I run dhclient Internet Systems Consortium DHCP Client V3.1.2 Copyright 2004-2008 Internet Systems Consortium. All rights reserved. For info, please visit http://www.isc.org/sw/dhcp/ Listening on LPF/eth0/08:00:27:9b:43:09 Sending on LPF/eth0/08:00:27:9b:43:09 Sending on Socket/fallback DHCPREQUEST of 192.168.56.104 on eth0 to 255.255.255.255 port 67

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• Installing Linux kernel 2.6.25.14 on RHEL 5.4

  - by aaron

  I have to install Linux kernel version 2.5.25.14 on a RHEL 5.4 server because of drive compatibility issues. I follow the RedHat "Building a Custom Kernel" instructions running the following: $ make mrproper $ make xconfig $ make clean $ make bzImage $ make modules $ make modules_install $ make install But I get a bunch of warnings like this: WARNING: No module ehci-hcd found for kernel 2.6.25.24, continuing anyway When I try to boot this kernel it is unable to mount the hard drive, and kernel panics on startup. As far as I can tell I'm using a standard configuration (I just accept the defaults and save a .config file). Is there something I'm missing? Thanks.

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• Blocking ports on the public IP assigned to lo interface in GNU/Linux

  - by nixnotwin

  I have setup my Ubuntu server as a router and webserver by following the answer given here. My ISP facing interface eth0 has a private 172.16.x.x/30 ip and my lo interface has a public IP as mentioned in the answer to the question linked above. The setup is working well. The only snag I have experienced is that I could not find a way to block the ports exposed by the public IP on the lo interface. I tried doing iptables -A INPUT -i eth0 -j DROP, and my server lost connectivity to the public network (internet). I could not ping any public ips. What I want is a way to block ports that are exposed by the public ip on the lo interface. And also I require iptables rules that can expose ports like 80 or openvpn port to the public network.

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• Installing a program on Linux: providing a short command

  - by rwallace

  Suppose you're distributing a program to run on Linux, call it Foo, and the program executable is called foo.exe (because it's a CLR program so it runs under Mono) and it needs a couple of DLLs in the same directory and maybe a later version might need some data files that it reads on startup and whatever, so relocating it to a global bin directory is a bit of hassle and it really prefers to remain in its original directory... But the user would prefer to invoke the program by typing foo instead of mono /path/to/foo.exe. What's the best/most usual way to provide such a short command? Can/should an install script/makefile create a one line script called foo that invokes the full path, and put the one line script in a global bin directory? If so, what should be the target bin directory, and are there any directions about exactly how to do this? Or is there a preferred alternative?

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• How to install and Configure MTA on Linux [closed]

  - by Umair Mustafa

  I need to know which MTA's is better and simple to handle and configure in linux. As I need to run a script that will send me the output of that command whenever it will run using cron. Ok the case is this. Every day I have to manually check the Disk space of server which are more than 30 which is headache and have to document that. So I will simply add the follwing command DF- H and the output of this command should be send on my email. So now IF u got the story then tell me what MTA is better sendmail, postfix and some instructions on HOW TO INSTALL and CONFIGURE it. And after configuring the How do I add the DF -H so that it will start seniding me the output on my email. Thanks in advance.

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• Question about the linux root file system.

  - by smwikipedia

  I read the manual page of the "mount" command, at it reads as below: All files accessible in a Unix system are arranged in one big tree, the file hierarchy, rooted at /. These files can be spread out over several devices. The mount command serves to attach the file system found on some device to the big file tree. My questions are: Where is this "big tree" located? Suppose I have 2 disks, if I mount them onto some point in the "big tree", does linux place some "special marks" in the mount point to indicate that these 2 "mount directories" are indeed seperate disks?

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• Live resize of a GPT partition on Linux

  - by cyberz

  On Linux I used to resize MBR partitions using fdisk, even on live filesystems, and then issue a resize2fs/pvresize/... (depending on fs type) to get the new space allocated. Lately I've been using Xen and GPT partitions, and I've noticed that unfortunately parted doesn't seem to allow on-the-fly resizing of a mounted partition, in fact it will complain: Error: Partition XXX is being used. You must unmount it before you modify it with Parted. I've tried both the resize command and even rm + mkpart combination, but they will both complain about the partition being mounted. How can I do that?

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• Linux - How to manage the password of root?

  - by Jonathan Rioux

  We have just deployed a couple of Linux server. Each sysadmin will have his own account on the server (i.e.: jsmith), and will connect using SSH with a certificate which will be put into the "authorized_keys" file in their home directory. Once connected on the server, if they want to issue an elevated command, they will do like: sudo ifconfig They will then enter the root password. What I would like to know now are the best practices in managing that root password. Should I change it periodicaly? And how do I share that new password with the sysadmins? **Of course I will disable the root logon in SSH.

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