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  • Tail and wildcard characters

    - by Mitch
    I want to get the last 10 lines of multiple files. I know they all end with "-access_log". So I tried: tail -10 *-access_log But this gives me an error, where as: tail -10 file-* Gives me the output I'd expect. I would think this probably has more to do with BASH then tail. However commands like: cat *-access_log Work fine. Any suggestions?

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  • How to backup Servers to an SSH-Host with low traffic and access to versions and encryption?

    - by leto
    Hello, I've not run backups for the past dont't remember anymore years for my personal stuff until waking up lately and realising contrary to my prior belief: Actually. I care! :) Now I have a central data server at home where I want to attach an external media to, to which I want to save backups of my most important stuff, like years of self-written scripts, database dumps, you name it. I've tinkered with rsync+ssh over the last two years, also tried tar over ssh, but don't know the simplest and most easy to maintain way to do it yet. Heres my workload: A typical LAMP-Server (<5GB Data) which I'd like to backup fully so lots of small files connected via 10Mbit My personal stuff (<750GB Data) from a Mac connected via GE My passwords in an encrypted container (100Mb) from OpenBSD connected via serial-PPP My E-Mail from the last ten years (<25GB) as Maildir which I need to keep in readable format Some archives (tar.*) which I need to backup only once and keep in readable format (Deleted my ideas, as I'm here for suggestions) What I need: 1. Use an ssh-tunnel for data transfer 2. Be quick with lots of small files 3. Keep revisions 4. Be sure the data I save is not corrupted 5. Intelligent resume functions and be able to deal with network congestion :) 6. Compressed and optionally encrypted storage 7. Be able to extract data from backup easily (filesystem like usage would be nice) How would and with what software would you backup this stuff? Hints to tools that can help solve only part of my problem (like encryption) also greatly appreciated. Greets

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  • USB webcam just works once and next time I've to reboot

    - by user30262
    I'm using Ubuntu 9.10, and a usb webcam that is shown as 'Bus 001 Device 005: ID 0ac8:3450 Z-Star Microelectronics Corp.' by lsusb. The problem is that on connecting the cam, it just works with the first program I start (skype, tokbox, messenger), and if I disconnect it or switch to another program, it stops to work and I have to restart my computer to make it work again. Has anyone else noticed this behaviour? Is there some good solution to reset the camera without rebooting to make it work again?

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  • How do I reset my PYTHONPATH?

    - by Underyx
    Somehow my PYTHONPATH environment variable got emptied, and now I can't import some downloaded modules. I've tried running the following command to reinstall all Python packages, but it didn't set the variable back to its original value: dpkg-query -W -f '${package}\n' | grep python | xargs -I % sudo apt-get install % --reinstall How do I reinstall the packages so that this gets sorted out? The (Vagrant) box is running Ubuntu 12.04.

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  • Provide credentials to process in a safe manner

    - by Erik Aigner
    On system startup I need to launch a process which requires credentials for other services (database etc.) to interact. I obviously don't want to store those on disk for security reasons. I'm trying to think of a way to provide those credentials to the process on launch - and on launch only. After that they should be only available to the process. Is this possible somehow? The bottom line is to make it as hard as possible for an intruder to get to those credentials.

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  • CPU/RAM usage log over a period of time to file on CentOS

    - by joel_gil
    Hi everyone Im looking for an app pr line of code that could let me observe a process, save the info in a number of variable and then put the gathered info on a file. Ive been trying with variations of top but no luck. I am running several CentOS virtual servers, VM is 2gb ram 2 processor. Maybe a script that works over a specified amount of time while writing lines with the info on a text file so at the end i can have a sort of table with the data. The thing is Im going to stress test the server and I would like to have the data to make some statistics. Any comments and suggestions are most welcome.

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  • Thunderbird doesn't raise or give focus when you click "Write" or "Reply".

    - by Neil
    I'm using Thunderbird 2.0.22, the version that comes with Ubuntu Intrepid 8.10. When I hit "Reply" or "Write", a new email window pops up, but it ends up being under the main Thunderbird Window, and doesn't have focus. Thunderbird is the only application that exhibits this weird behaviour, and it just started happening one day, whereas it worked fine before. I've seen this problem years ago as well, and wasn't sure how I fixed it.

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  • There's Not an App for That (Yet)

    - by Mark Hesse
    With an earlier-than-normal departure this morning to avoid the stalemate known as traffic congestion, I suddenly realized what I had failed to grab on my way out the door...  my company ID badge.  Unfortunately, at the time of my epiphany, I was far enough into commuter no-man's land where turning back would completely negate my early departure and increase my overall drive time exponentially.  Not being one to retrace my steps, I decided to press on. Upon arrival at the office and with an hour to go before a security guard would be on duty, I started thinking about the number of times I had forgotten my ID vs. the number of times I had forgotten my phone.  While rare on both accounts, my ID was most likely the missing artifact. I then wondered why there isn't an app for my smartphone that allows me to verify my credentials with my employer and then, provided with a secure token for the day, have the ability to access my building's card entry system.  On many levels, this seems much more secure than an ID card which can be lost, stolen or even forged and then used simply by tailgating into and around buildings at facilities where card scanning can generally be avoided.   As it turns out, another building on the campus has 24 x 7 guard coverage, so I was able to gain access in a relatively short time and secure a temporary ID badge.  Once inside and online, a quick internet search on the subject of smartphone badge access shows that efforts are underway to do exactly what I was thinking needed to be done. Having not spent any time studying about the technology, I discovered that it relies on Near Field Communications (NFC) enabled smartphones (of which, mine does not provide).  The only other option would require modifications to the security infrastructure to support alternative authentication technologies, such as barcode readers, which would be extremely costly to implement. For now, my best option is to put my corporate ID under my car keys... 

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  • Error installing Java on Ubuntu Server

    - by Camran
    I get this error almost when installation is finished: /proc is not mounted; some java apps may fail Could not create the Java virtual machine. Error occurred during initialization of VM Could not reserve enough space for object heap Ignoring error generating classes.jsa Why is this? I just entered sudo apt-get install sun-java6-jre sun-java6-plugin sun-java6-fonts Is there something I must do first? What is Proc? If you need more input let me know. Thanks

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  • Path erased in Debian

    - by Lyon83
    I'm trying to deploy a rails app in Debian, using Apache/Passenger. I was trying to fox a problem with some GEMs and in the process I put executed this in console: export PATH=/var/lib/gems/1.8/bin/:${vendor/cache} Now my path environmental variable is gone, or at least its content. My server is running under Debian 6. Is there a way to recover my path info? Or at least can someone point me where to find the file where that variable i s stored? Some help please. This is a BIG problem for me. Thanks in advance!

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  • It's the ethernet 10/100 in LAN transfer faster than USB 1.0?

    - by dag729
    I have an old laptop (PIII 800MHz, with 256 RAM) that I wish to use as my home server: it'll have to serve just two people, so I think that I'll be more than ok as for the RAM and the CPU. The issue is about data, because the internal hard disk is a 12GB, that is...ridicolous! I have more than 60GB of mixed storage and counting (images, videos and music) in an external usb hd. I could put the hd in my desktop pc just to serve the big files through ethernet or let it inside its usb box attached to the laptop. The question is: which of these solutions will be the fastest? USB 1.0 attached to the server (laptop) or internal hard disk serving files via 10/100 ethernet to the laptop on demand?

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  • Fedora 16 Running Hot

    - by sdasdadas
    Since switching from Windows 7 to Fedora 16, my laptop has been running incredibly hot (by the air exhaust). The laptop is an Asus K73S. Running 'sensors', I receive: acpitz-virtual-0: 75.0 celsius nouveau-pci-0100: 66.0 celsius asus-isa-0000: 75.0 celsius The only CPU hog is Firefox at 30 - 40% on average. My GPU information (from lspci) is: Intel Corporation Xeon E3-1200/2nd Generation Core Process or Family Integrated Graphics Controller (rev 09). Running lspci | grep -i VGA, returns: 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 01:00.0 VGA compatible controller: nVidia Corporation GF106 [GeForce GT 555M SDDR3] (rev a1) I don't notice a huge difference running without the battery, but it does seem a little cooler. Thanks!

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  • Xen HVM Windows 2008 network bridge

    - by JavierMartinz
    I have a problem with the Windows Server 2008 guest (hvm). I can't get a network interface running for him. I also have a Debian guest and it's working ok, but I can't do it with the Win2k8 guest. When I started the VM, the machine freezes and I can't connect by ssh to the host. /etc/network/interfaces # The loopback network interface auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 188.165.B.C netmask 255.255.255.0 network 188.165.B.0 broadcast 188.165.255.255 gateway 188.165.B.254 brctl show bridge name bridge id STP enabled interfaces eth0 8000.e840f20acc28 no peth0 /etc/xen/xend-config.sxp ... (vif-script vif-bridge) (network-script 'network-bridge') ... /etc/xen/win2k8.cfg # Networking # vif = [ 'ip=5.39.F.G,mac=yy:yy:yy:yy:yy:yy,type=ioemu,bridge=eth0' ] /etc/xen/debian.cfg # Networking # vif = [ 'ip=178.33.D.E,mac=xx:xx:xx:xx:xx:xx' ] As you can see, in the Debian guest I only have to specify an IP address and a MAC. But if I put that in the Win2k8 guest, the machine does not start. I am using Xen 4.0

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  • Cross-platform centralized desktop password manager

    - by Dave
    I have been using KeePass as a desktop password manager on Windows for many years. Love it! However, I am now needing to work on different platforms much of my day (Windows 7, Windows XP, Mac OS X, Ubuntu, and OpenSUSE.) I'm looking for a password manager I can share across all these platforms. My ideal solution would: Run natively (not in a virtual machine) on all platforms. Store the "official" copy of the password data on a local network so I can get to it from any and all machines. It is OK if it locks (or becomes read-only) when one client is accessing it. Keep a local cached copy (read-only is fine) so I can still get to my passwords when disconnected from the network. Does any such beast exist?

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  • How to get a remote desktop / X11 with ubuntu 10.04 LTS from mac os x?

    - by cwd
    I am running Snow Leopard OS X 10.6 and I have X11 installed. I also have ubuntu 10.04 LTS running on a remote machine. I have root privileges. So far I haven't really installed anything besides the operating system. This was done in an amazon aws type of way. I see people talking about getting gnome or a "remote desktop" type of thing working, but I'm not sure how to go about this. I connected and then typed in gnome-session but nothing happened. Maybe I don't have that thing installed yet? Can someone point me in the right direction? Also, is it possible to just start an X11 session with a single app, like notepad or a file and folder browser?

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  • I'm trying to set up a LAMP server so it's totally anonymous, any suggestions?

    - by flexterra
    I'm going to set up a web service which will use the LAMP stack. One of the most important features of the site is that it should be anonymous. We thought that a cool thing will be if the server didn't made any logs that could potentially identify a user. I'm working on a web app for a news organization. They want a site to allow people to sumbit news leads and tips (text / files) to journalists. We think if we can provide good anonymity people will be more inclined to provide information. We will also teach how to use stuff like TOR as an extra precaution for whistleblowers Is this even possible? Any suggestions of obscure things we should look into?

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  • soft lockup - CPU#0 stuck for 11s! error with Xen virtual machines

    - by Arun
    Getting a kernel panic with this error on my XEN VPS's. (all on 8.04 LTS) The kernel version on my Dom-0 is 2.6.24-25-xen and the kernel version on the Xen VPS is also 2.6.24-25-xen. I read something about disabling APIC from here http://muffinresearch.co.uk/archives/2008/08/20/ubuntu-bug-soft-lockup-cpu0-stuck-for-11s/ but that doesn't seem to help as well. Anyone experienced this and are there any workarounds? Thanks in advance!

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  • Is data=journal on a separate device on Ext4 as good as using a RAID controller with battery backed cache for file system consistency?

    - by Jeff Strunk
    It seems to me that data=journal prevents file system inconsistency in the case of power failure. Using it with a dedicated journal device mitigates the performance penalty of writing the data twice. A power outage would still lose the data that is currently being written to the journal, but the file system on disk would always be consistent. If that amount of loss is acceptable, is a RAID controller with battery backed cache really worthwhile?

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  • Ubuntu server users question

    - by Camran
    I have read this article: https://help.ubuntu.com/9.04/serverguide/C/user-management.html But it doesn't go into depth with the privileges section. I need to know how to set privileges of me (as a user). I am the only user, but I want access to everything, but I don't want to manage my VPS logged in as root. So I am creating a username. Anybody have a list of privileges, what they mean and how to set them? Thanks

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  • Bridging two wireless interfaces with brctl?

    - by AK_
    I have this topology: [internet] ^ L-------[wlan0]-[host]-[wlan1]-----[client-1] I tried to bridge wlan0 wlan1 but it wont work with brctl; but magically when I issue this command #iw set dev wlan0 4addr on it adds wlan0 to the bridge BUT I lost all internet connection and I was unable to hook it to the internet router. can somebody please explain why did that happen and is there a way to get this done ?

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  • How much ram to be able to convert large (5-6MB) jpegs? [closed]

    - by cosmicbdog
    I've got a project where we want to be processing large jpegs (5-6MB) with apache and php (using GD library). My understanding is that the server converts the image into a BMP making it quite ram heavy and currently we're unable to do it with our 1gb of memory. Here's the error we get: Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 17408 bytes) How much ram should we be looking at running with to process images of this size? Edit: As Chris S the purist highlighted below, my post is apparently vague. I am doing the most basic and common manipulation of an image, say turning it from a 4352px x 3264px jpg of 5mb in size, to a 900px x 675px file.

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  • What steps should I take to secure Tomcat 6.x?

    - by PAS
    I am in the process of setting up an new Tomcat deployment, and want it to be as secure as possible. I have created a 'jakarta' user and have jsvc running Tomcat as a daemon. Any tips on directory permissions and such to limit access to Tomcat's files? I know I will need to remove the default webapps - docs, examples, etc... are there any best practices I should be using here? What about all the config XML files? Any tips there? Is it worth enabling the Security manager so that webapps run in a sandbox? Has anyone had experience setting this up? I have seen examples of people running two instances of Tomcat behind Apache. It seems this can be done using mod_jk or with mod_proxy... any pros/cons of either? Is it worth the trouble? In case it matters, the OS is Debian lenny. I am not using apt-get because lenny only offers tomcat 5.5 and we require 6.x. Thanks!

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