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• Should I use VFAT or ext3 for a 1Tb external usb hard drive?

  - by ihuston

  I have a 1 Tb USB external hard drive which I want to use to backup data from my home and office desktops (both running Linux). Should I format the drive (possibly split into a few partitions) as vfat or ext3? I don't anticipate using the drive with Windows very often so this is not a primary concern. The main thing holding me back from just using ext3 is the problems you can have when two different users (home and work accounts) try to access each others data. Is there any way to mount an ext3 drive with user id mapping?

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• how to google a symbol keyword like "$?"

  - by ZhengZhiren

  i saw a trick in a book: in a linux shell, we can use &? to get the return value of a command. For example,we run a command,if it exit normally, the return value is 0. And then we type $?,we will get 0 in the screen. i want to google this kind of usage, so i have to type these two symbol $? in the search blank.But the search engine just return nothing to me... i have looked at the google help page, but still can't find a solution. so my question is: how can i search with this kind of keyword. or if you can give me some advise of the usage of $? or sort of thing, that will be also appreciated.

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• Which simple server virtualization solution to use?

  - by vvanscherpenseel

  For one part of our hosting platform we are currently using VMware Server 2 to create two virtual machines on one physical machine. One VM is used for hosting of small websites, the other VM is used as a staging environment. Both the host OS and guest OSes run CentOS Linux. Support for VMWare Server 2 has been discontinued and we are currently looking for a replacement. We only use basic functionality (we don't use snapshots, moving around VMs to different physical machines, or other 'advanced' functionality'). Just a box, with two VMs. We are looking for a virtualization solution that has long-term support, is stable and allows configuration/management from Mac OSx (I understood that Xen only has a Windows client). What would be the right solution for us?

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• Wifi and eth behavior

  - by r00ster

  I have a wireless router 150M Wireless Lite N Router Model No. TL-WR740N / TL-WR740ND. Normally, when I'm connected to the local network using eth0 I can ping other machines by issuing ping name. When I'm connected through wifi I have to issue ping name.domain.com. The machine is only visible in intranet. How to achieve the same behavior with wifi? The second problem is, that I can not connect to some external sites through wifi but through eth everything is ok. I guess that is related to some port forwarding, but I'm not sure. How can I resolve this issue? EDIT: I'm using Linux Mint.

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• How to turn on/turn off leds by terminal?

  - by GarouDan

  I would like turn on/turn off some of my leds running a command on linux. I use Ubuntu 12.04 LTS. I tried xset led named "Scroll Lock" xset led named "Num Lock" xset led 2 (this is the number of Scroll Lock as `xset q` says) xset led 1 but nothing works. Tried setleds +num setleds +scroll but I got a error message saying Error reading the current settings of flags. Maybe you're not on the console? (I was in a terminal). So, how can I perform this?

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• Desktop file for my pythin script

  - by Jason94

  Hi! I would like to make a .desktop file for my Python script, but so far the only thing i have is a clickable icon on my desktop! It does nothing when i click it, so im guessing there is something wrong with the execution :) The desktop file: [Desktop Entry] Version=1.0 Type=Python Exec=/home/user/MyDocs/Python/EasySteer/Main.py Name=EasySteer Icon=steering_wheel X-Icon-Path=/usr/share/icons and I also tried: [Desktop Entry] Version=1.0 Type=Application Exec=/usr/bin/xterm "python /home/user/MyDocs/Python/EasySteer/Main.py" Name=EasySteer Icon=steering_wheel X-Icon-Path=/usr/share/icons But nothing works :D if it matters this is for my Nokia N900 mobile phone that runs Maemo linux, but i think the basics are the same.

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• Configure redis to not have everything in memory?

  - by acidzombie24

  I like redis because it lets me do operations on data structures. I wanted to see what would happen if i were to put more data into redis then i have for ram. So i wrote a loop that inserted 30k bytes repeatedly and set maxmemory 100MB. I figure it would stay at 100mb. It kept growing. Past 1gb then past 2gb. Suddenly it crashed because i ran the 32bit version. Now... i dont understand what the point of maxmemory is? I am using the windows version so maybe its ignored. Does redis have to have everything in memory? If i have a site (on linux) with a 10gb database and 512mb on the machine will redis work? I don't need it to be amazingly fast i just prefer to modify data in it then sql (although i hope it is still faster then mysql)

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• cdrom drive doesn't work on laptop

  - by bozdoz

  Here's as best as I can describe it: When starting up, the boot order doesn't recognize the cdrom drive, but I can open and close the drive during this time. In Windows 7, I can't open the cdrom drive, and it doesn't recognize it in device manager, disk management, or my computer. In Ubuntu Linux, I can open the cdrom drive, but it still doesn't recognize the cds, and it won't mount. If I reformat everything, would my cdrom drive work again? Can I reinstall Windows without a cdrom drive? I've deleted the upper and lower filters as was suggested in Google searches. Took the disk drive out and checked that it was installed correctly (no reason it shouldn't have been). Still: nothing works.

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• Replacement for NIS/YP

  - by mdpc

  The company that I am working for is embarking on replacing the current locally developed NIS/YP structure with LDAP. We already have AD in house for the Windows stuff and would like to consider using an AD system. The AD people are quite restrictive and would not support extensive modifications. We have needs to have the replacement include the support the full capabilities of the NIS/YP suite include netgroups, login restrictions to specific servers for specific users or groups of users, consistent passwords between the *nix and Windows environment,etc. Our environment is a mixture of Linux (suse, RH, Debian), Sun, IBM, HP and MPRAS as well as a NETAPP. So whatever we use must be totally inclusive to all environment. We have looked at Likewise, but our management wants other alternatives to compare with. What other things should I be looking at and what is you assessment of the alternative? Thanks

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• How do I prevent 'net ads join' from doing DDNS update?

  - by genehack

  I'm using 'net ads join' to add Linux servers to an AD domain. The servers are multi-homed, with a public IP on eth1 and a non-routable private background network on eth0 (in the 172.20 space, used for netboots and installs and stuff -- no routing to the Internet on that network). When I 'net ads join', it appears that a DDNS entry is getting created for the 172.20 interface. How can I prevent this from happening? (FWIW, my powers at the AD level are very limited -- I can join servers and delete server records but that's about it...)

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• Deactivate GPU and use IGP

  - by squelos

  I am having some trouble with my Sony Vaio SVE1511W1e laptop. It has an ATI Radeon and the i5 has an IGP (i5 2450m). I don't often use my GPU, and the IGP would be just enough for most usage I do. Therefore, in order to improve the battery life, I wish to deactivate the GPU and use only the IGP. The problem is that my BIOS doesnt allow me to do so. But I believe it is possible to deactivate the GPU 'programatically'. I'm running Debian Wheezy on the 3.2.0.4 AMD64 kernel. The first problem I'm running into is that when I run lspci, my IGP doesnt show up. Could this be because im lacking a kernel module? (I chose a targeted installation). What are the solutions to deactivating a GPU and using an IGP on a Linux System such as debian?

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• How to install ubuntu OS using an android mobile as a usb drive?

  - by Rochelle Canale

  I just want to ask if How can I install Ubuntu OS from android phone? I have the ubuntu.img and .md5 file. But I don't knwo how to run this. I also have Linux installer and VNC. Everytime I launch the application the terminal emulator always force close. So I think that there's an error with the application. Any idea how can I install this? I am using myphone A848 duo same as Noir A6 and micromax A68.

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• Distributed filesystem for automated offline data mirroring

  - by Petr Pudlák

  I'd like to achieve the following setup: Every time I connect my laptop to a local network, my partition gets automatically mirrored to a partition on my local server. I only want to mirror what has changed from the last time. (I understand that it is not a proper backup solution since there is no history of the changes, it'd be more like a non-persistent network RAID.) Is there a distributed file system that allows such a setup? I've done some searching and it seems to me that most distributed file-systems are focused on data availability and distribution, not duplicating them. I'd be thankful for suggestions. Edit: Sorry, I forgot to mention: I'm using Linux.

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• Grub hangs intermittently on "Starting Up..."

  - by Griffo

  Hi all, I've had this problem for a while now. My linux server is set to wake-on-lan but occasionally it halts at Grubs "Starting Up..." and goes no further. This is not due to additional hardware being attached such as a flash drive or anything as I never plug anything into it. It may boot perfectly 40 times in a row and then hit this issue. Sometimes it gets the issue a couple of times in quick succession and doesn't happen for ages again. I'm not sure how to diagnose it since it doesn't seem to be reproducible. Any help much appreciated. Thanks

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• Ubuntu not showing hard drive

  - by ojek

  I have a laptop which had a broken installation of Windows 7 installed on it. I created a Ubuntu live USB and tried installing Ubuntu over that Windows 7. After a few minutes, I got an error message, so I needed to restart the computer. Now the laptop says that there is no bootable device - reasonable message given that there was an error during Linux installation. However: BIOS can see my hard drive, When I start Ubuntu in live mode, and try either sudo fdisk -l or gparted, it doesn't show any hard disk drives. I am 90% sure that the hard drive is broken, but it is weird that BIOS can see it, and Ubuntu doesn't. How can I be 100% sure about that hard drive? Is there any additional way of detecting my hard drive from Ubuntu?

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• Files copying between servers by creation time

  - by driftux

  My bash scripting knowledge is very weak that's why I'm asking help here. What is the most effective bash script according to performance to find and copy files from one LINUX server to another using specifications described below. I need to get a bash script which finds only new files created in server A in directories with name "Z" between interval from 0 to 10 minutes ago. Then transfer them to server B. I think it can be done by formatting a query and executing it for each founded new file "scp /X/Y.../Z/file root@hostname:/X/Y.../Z/" If script finds no such remote path on server B it will continue copying second file which directory exists. File should be copied with permissions, group, owner and creation time. X/Y... are various directories path. I want setup a cron job to execute this script every 10 minutes. So the performance is very important in this case. Thank you.

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• rss downloader script

  - by The Digital Ninja

  I have a Synology NAS that is powered by linux at my house. I'm looking to set up a cron script to check a group of rss feeds and auto download new video podcasts to a shared folder. I can do most of the scripting, such as deleting files older than 3 weeks and the wget parts. But I'm not sure how to parse the rss feed and check dates to only grab the latest. I figured its best not to re-invent the wheel and surly someone out there has a command line rss downloader or some such script. Any ideas?

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• VMware Workstation 7&8&9 does not generate /etc/vmware/network upon installation

  - by dash17291

  When I install VMware Workstation on Arch linux Virtual ethernet is not working. $ sudo tail /var/log/vnetlib Aug 28 22:20:33 VNLFileExists - Cannot check for file or directory: /etc/vmware/networking , error: No such file or directory Aug 28 22:20:33 VNLNetCfgLoad - Import file does not exist Aug 28 22:20:33 VNL_Load - Error loading the vnet configuration, file used: /etc/vmware/networking Aug 28 22:20:33 VNLNetCfgUnload - Requested cache is not loaded Database file is not present. Failed to initialize Aug 28 22:20:41 VNLFileExists - Cannot check for file or directory: /etc/vmware/networking , error: No such file or directory Aug 28 22:20:41 VNLNetCfgLoad - Import file does not exist Aug 28 22:20:41 VNL_Load - Error loading the vnet configuration, file used: /etc/vmware/networking Aug 28 22:20:41 VNLNetCfgUnload - Requested cache is not loaded Required modules compiled. Previously I have copied that file or directory (I don't remember) from a working installation, but now I need a real solution. It's strange for me, may be a hardware issue also because with Ubuntu the same thing happens on the same computer.

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• Mount cifs share anonymously

  - by churnd

  I have a Windows 2003 Server sharing out a few folders as read-only to "Everyone". The server is a domain member, so I'm not able to connect to the share on computers that aren't on the domain without passing some form of credentials. I have a linux box that I want to mount the share on at startup, so I want to put the share mountpoint in fstab. I have this setup by specifying a credentials file that is only readable by root, but I would rather either not use a credentials file or specify some guest/anonymous user. Can I do that, & if so, how?

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• How to give write permissions to multiple users?

  - by Daniel Rikowski

  I have a web server and I'm uploading files using an FTP client. Because of that the owner and the group of the file are taken from the user used during the upload. Now I have to make this file writable by the web server (apache/apache). One way would be to just change the owner and the group of the uploaded file to apache/apache, but that way I cannot modify the file using the FTP account. Another way would be to give the file 777 permissions. Both approaches seem not very professional and a little bit risky. Are there any other options? In Windows I can just add another user to the file. Can something similar done with Linux?

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• How do I restore the Gnome Panel volume control in Ubuntu 10.04?

  - by Neil

  I use alsa, and I don't have a volume control applet on my Gnome Panel. When I right click and select "add to panel", there is nothing that has to do with "sound", "audio" or "volume" in the list, and the "Indicator Applet" or "Indicator Applet Session" things have no volume controls, or properties that would let you enable any sort of volume control. How can I get a volume control in Ubuntu, so I don't have to run aumix in a terminal or something? I've been using Linux since Redhat 5, it's beyond me why these sorts of problems are still around. Someone should just put a damn "Volume Control" element in the list of things to add to the panel, even if it doesn't work, perhaps showing an error message.

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• Windows 7/8 can't connect to an N Router

  - by xenoterracide

  I have a router running OpenWRT backfire, with N and A/B/G being broadcast. A linux laptop, and a Mac laptop can see the N network and connect to it (or at least they could last weekend). But there is now a Windows 7 Desktop with a B/G/N wireless card, and a Windows 8 Laptop with a B/G/N wireless card that can't see the N network only the B/G broadcast. The B/G and N have different SSID's and Encryption ( WEP and WPA2 PSK respectively ). The N SSID isn't even visible. Does anyone have any suggestions as to how to troubleshoot further? Or what might be the cause? update wireless info Desktop Dell Wireless 1502 802.11b/g/n Atheros Communications Inc 9.2.0.412

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• Desktop file for my Python script

  - by Jason94

  I would like to make a .desktop file for my Python script, but so far the only thing i have is a clickable icon on my desktop! It does nothing when I click it, so im guessing there is something wrong with the execution :) The desktop file: [Desktop Entry] Version=1.0 Type=Python Exec=/home/user/MyDocs/Python/EasySteer/Main.py Name=EasySteer Icon=steering_wheel X-Icon-Path=/usr/share/icons and I also tried: [Desktop Entry] Version=1.0 Type=Application Exec=/usr/bin/xterm "python /home/user/MyDocs/Python/EasySteer/Main.py" Name=EasySteer Icon=steering_wheel X-Icon-Path=/usr/share/icons But nothing works :D if it matters this is for my Nokia N900 mobile phone that runs Maemo linux, but I think the basics are the same.

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• How can I use rsync with a FAT file system?

  - by Kim

  I would like to write a simple backup script that saves some data to a FAT drive. Should I reformat the drive and use a better file system or is it possible to use rsync with FAT? If so, what problems might I run into? Would performance be a lot worse? EDIT: This is on linux, didn't even know there was a rsync for windows. The sources are various file systems (it's a mess), and the destination is currently formatted with FAT32. Thank you for your answers, I'll probably go for a reformat, since I'm not completely sure about the file sizes we'll have.

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• PuTTY: how to properly emulate -t option

  - by John Sonderson

  On Linux the ssh command has a -t option whose man page reads: Force pseudo-tty allocation. This can be used to execute arbitrary screen-based programs on a remote machine, which can be very useful, e.g. when implementing menu services. Multiple -t options force tty allocate, even if ssh has no local tty. I would like to use this same option with PuTTY on Windows. In particular, I can see that PuTTY has a bunch of options under: Category - Connection - SSH - TTY and suspect it might be possible to achieve the same behavior via some of the (NUMEROUS!) settings found on this screen. Anyone know how to configure the following command: ssh -t USER,[email protected] create Thanks!

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