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  • power management of USB-enclosed hard drives

    - by intuited
    With a typical USB hard drive enclosure, is the full range of drive power management functionality available? In what may be an unrelated matter: is it possible to suspend a PC without unmounting an attached USB-powered drive, and then remounting it on resume? This is the behaviour I'm currently seeing (running Ubuntu linux 10.10). Are there certain models or brands that provide more complete control over this aspect of drive operation? My Friendly Neighbourhood Computer Store carries (part of) the Vantec Nexstar product line.

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  • Monitor number of bytes transferred to/from IP address on port.

    - by Mike
    Can anyone recommend a linux command line tool to monitor the number of bytes transferred between the local server and a specified IP address/port. The equivalent tcpdump command would be: tcpdump -s 0 -i any -w mycapture.trc port 80 host google.com which outputs : 46 packets captured 131 packets received by filter 0 packets dropped by kernel I'd like something similar that outputs: 54 bytes out, 176 bytes in I'd like it to work on RHEL and be free/open-source. It would be good if there was an existing tool which I was just missing too!

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  • how to use rsync over ftp

    - by bumperbox
    debian4 linux i have the following cmd line which works fine rsync -avr -e ssh /home/dir [email protected]:/home/ but i need to setup it up now to rsync to a remote server that only has ftp on it how do i go about that ? i looked at the rsync help but quickly got lost (i don't do this stuff very often) thanks alex

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  • E-mails sent with postfix are marked as spam.

    - by unkown
    I am using gmail as my email provider, and I only have gmail servers for my mx records. I don't like the 500 message per day cap. To address this issue I would like to run postfix on my Linux machine to only send email, port 25 blocked by my firewall. I can send email, however google marks all messages sent with postfix as SPAM. How do I make sure that people know email sent with postfix is valid?

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  • What is the reason partitioning is usually a step in installing multiple OS's?

    - by P.S.
    What is the reason partitioning is usually a step in installing multiple (2) operating systems on the same computer? Does an operating system have to have it's own partition to run or can it run in the same partition as another operating system? (i.e. -can two of the same flavor run in the same partition but if you have one Linux and one windows it needs to be partitioned?) Is it necessary to make disk partitions to run multiple operating systems?

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  • Can not connect to service with my public IP, only with localhost

    - by Sanoj
    I have installed Linux Mint 8 (based on ubuntu). And I have setup a webserver on port 8098. I can connect to my webserver with http://127.0.0.1:8098, but when I try to connect to http://192.168.1.107:8098 from the same machine or another machine it doesn't work. How can I get this working? Is there any default firewall settings that I have to change?

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  • pscp.exe (Putty SCP) ignoring preserve attributes flag

    - by jslatts
    I am trying to scp files from a windows server to a linux server with the original time and dates intact. When running the command: pscp.exe -p C:\temp\somefile.txt user@server:/temp/ The file on the server always has the date/time of the transfer, not the original file. Putty SCP seems to be completely ignoring the preserve attributes flag. Anyone experienced this before and/or have a solution?

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  • X Error of failed request: BadMatch (invalid parameter attributes) ffmpeg error

    - by Evan Carroll
    I'm getting the following error message in ffmpeg: X Error of failed request: BadMatch (invalid parameter attributes) Major opcode of failed request: 140 (MIT-SHM) Minor opcode of failed request: 4 (X_ShmGetImage) Serial number of failed request: 11 Current serial number in output stream: 11 I turns up when I run the bash function mentioned in a forum post about streaming in Linux. What does it mean and how can I fix it?

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  • Capture virtual machine traffic in Fiddler

    - by HtS
    I'm running Ubuntu in a virtual machine (host machine is Windows 7). Is it possible to use Fiddler in the host machine to capture the traffic from the virtual machine? Seeing as the virtual machine's network must be passing through the host computers NIC, can Fiddler capture the packets? (I don't know of any free alternative to Fiddler for Linux, except Tamper Data, but I need a bit more control). Thanks.

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  • Failover Internet connection?

    - by ez_brian0
    Hi In my Linux server i have three network cards. The eth0 card is connected to ISP1, the eth1 card is connected to LAN and the eth3 card is connected to ISP2. What i want to do is to automatically use eth3 as Internet connection if the eth0 connection fails. How can this be done? Another problem is that my firewall is referring to eth0 as the server is doing NAT for clients this would be broken if eth3 is taken in use, how can this be solved?

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  • Windows Vista not booting after deleting a partition

    - by crapiscrewedup
    Hello, My cousin just deleted his Linux partition and another smaller partitio nand now Windows is not booting, no he does not have the recovery disc. When Windows tries to boot it goes to "GRUB" and says "partition not loaded". What are some GRUB commands? And is it possible to fix this without using the recovery CD? Thank you in advance.

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  • A Versatile Physical Server

    - by Paul
    How does one judge potential memory and processor needs for linux web servers? Specifically, given: A Debian or Ubuntu OS Running a web server (apache2), and A database (MySQL), and A DNS server (bind), and Being used by up to 100 concurrent users, at some points each downloading high-resolution (0.5 to 1 MB) images via a web app. How much should one budget in terms of RAM, type of processor(s), and number of cores? Thanks!

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  • Suggestions for making sysfs parameters persist across reboots

    - by ewwhite
    I'm experimenting with large changes to Linux system runtime parameters exposed through the sysfs virtual file system. What is the most efficient way to maintain these parameters so that they persist across reboots on a RHEL/CentOS-style system? Is it simply dumping commands into /etc/rc.local? Is there an init script that's well-suited for this? I'm also thinking about standardization from a configuration management perspective. Is there a clean sysfs equivalent to sysctl?

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  • How do you start a program after X has started?

    - by cyborg
    Hello, there's a little app called F.Lux that sets your screen temperature based on the time of day. The Linux version is a little spartan with just a console interface but it works perfectly well. The question I have is where can I invoke it so that it starts up after X has started? Thanks.

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  • Sharing a serial port between two processes

    - by peterrus
    As it is not possible to directly share a serial port between two processes using Linux, I am looking for another way to achieve this, I have heard about socat but could not find a concrete example of how to realize the following: Split one physical serial port (/dev/ttyUSB0) into two virtual ports, one for reading and one for writing, as one process only needs to send data, and one only needs to receive data. I can no modify the sending application unfortunately.

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  • Updating Python on Ubuntu system

    - by efficiencyIsBliss
    I want to update the Python build on my Linux box, but the only way I know how to do it is uninstalling the current version and installing the new one. My system is already up to date (I updated yesterday). I wanted to know if there is a way to update a specific program from the command line, like sudo apt-get update <program-name>. I know this command doesn't exist, but I'm hoping something equivalent does.

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  • Capture virtual machine traffic in Fiddler

    - by HtS
    I'm running Ubuntu in a virtual machine (host machine is Windows 7). Is it possible to use Fiddler in the host machine to capture the traffic from the virtual machine? Seeing as the virtual machine's network must be passing through the host computers NIC, can Fiddler capture the packets? (I don't know of any free alternative to Fiddler for Linux, except Tamper Data, but I need a bit more control). Thanks.

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  • Is it possible to change the Raid5 chunk size of an existing device?

    - by AlexCombas
    I have an existing raid5 device which I created using mdadm on Linux. When I created the device I set the chunk size to 64 but I would like to test the performance of various sizes but I don't want to have to rebuild my entire system to do so. If it is not possible to do it live then is it possible to do this by booting with a rescue disk? Any advice on the steps how to do this, either live or with a rescue disk, will be greatly appreciated.

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  • Is there an alternative to /dev/urandom?

    - by altCognito
    Is there some faster way than /dev/[u]random? Sometimes, I need to do things like cat /dev/urandom /dev/sdb The random devices are "too" secure und unfortunately too slow for that. I know that there are wipe and similar tools for secure deletion, but I suppose there are also some on-board means to that in Linux.

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  • Setting a mail server without root?

    - by Legend
    Is it possible to setup a mail server on a Linux machine without root permissions? I want to be able to create two aliases for a given mail ID. But if I remember correctly, it is no possible to do this without root privileges because I need to edit the configuration file and then restart the mail server. Does anyone have a suggestion to get around this problem?

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  • How to set multiple subdomains in the host file (DNS)?

    - by Milos
    I have a lot of subdomains in the main domain xxx.zzz So, for this domain, I can have aaa.xxx.zzz bbb.xxx.zzz ccc.xxx.zzz ddd.xxx.zzz eee.xxx.zzz ....ETC.... Istead of adding each subdomain in the host file, I would like to add only the main domain xxx.zzz and then to be able to access all the subdomains. I have tryed with *.xxx.zzz but apparently, this will not work (Linux or Windows). Any idea is welcome. Thank you very much.

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