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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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• Windows clients cannot access machine running DHCP server

  - by science9712

  I'm trying to setup a small LAN, using an Ethernet switch, an Arch Linux server, and around 10 Windows XP machines. This network has no outside connections. The Arch machine has a self configured ip address (configured with ip addr add 192.168.0.1 dev eth0), and acts as a DHCP server(using dhcpd). This portion works great, windows clients get IP addresses, the correct gateway settings, perfect. However, the clients cannot connect to each other, or to the dhcp server. When I run ping 192.168.0.1 on any client, I get no response, same happens if I try to ping any other client. On the gateway machine, I can't ping any of the clients either. Any help would be much appreciated!

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• Enlarge partition on SD card

  - by chenwj

  I have followed Cloning an SD card onto a larger SD card to clone a 2G SD card to a 32G SD card, and the file system is ext4. However, on the 32G SD card I only can see 2G space available. Is there a way to maximize it out? Here is the output of fdisk: Command (m for help): p Disk /dev/sdb: 32.0 GB, 32026656768 bytes 64 heads, 32 sectors/track, 30543 cylinders, total 62552064 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000e015a Device Boot Start End Blocks Id System /dev/sdb1 * 32 147455 73712 c W95 FAT32 (LBA) /dev/sdb2 147456 3994623 1923584 83 Linux I want to make /dev/sdb2 use up the remaining space. I try resize2fs /dev/sdb after dd, but get message below: $ sudo resize2fs /dev/sdb resize2fs 1.42 (29-Nov-2011) resize2fs: Bad magic number in super-block while trying to open /dev/sdb Couldn't find valid filesystem superblock. Any idea on what I am doing wrong? Thanks.

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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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• 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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• My computer gets hosted when using 3G

  - by WeaklyTyped

  I recently activated 3G(UMTS) connection on my cellular network. I use Nokia S60 phone as a modem while connecting from Scientific Linux 6. While I am able to access net pretty well, the problem is my computer gets hosted. By using ip-address in a web-browser, anyone can access my localhost (running apache), this never happens with my wireline (ADSL) connection. Furthermore, even the Shell prompt changes from: [mach2@localhost ~]$ to [[email protected] ~]$ where XX.XX.XX.XX is the IP of the 3G connection. The very thought of putting my machine 'in the wild' is disconcerting. How can I rectify the situation without disabling services like apache, sshd and others?

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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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• 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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• Why is my portable WD MY PASSPORT drive is not recognized?

  - by kloop

  My "MY PASSPORT" (Western Digital) portable drive is not recognized OSx. It used to be recognized, but not anymore. It does not appear in /Volumes. The hard drive is recognized by a Linux machine. I am not sure what happened -- any ideas how to fix that? Thanks. EDIT: ` #: TYPE NAME SIZE IDENTIFIER 0: GUID_partition_scheme *750.2 GB disk0 1: EFI 209.7 MB disk0s1 2: Apple_HFS Macintosh HD 749.3 GB disk0s2 3: Apple_Boot Recovery HD 650.0 MB disk0s3 /dev/disk1 #: TYPE NAME SIZE IDENTIFIER 0: FDisk_partition_scheme *1.0 TB disk1 1: DOS_FAT_32 MY PASSPORT 1.0 TB disk1s1 `

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• How to run long time process on Udev event?

  - by neclude

  (sorry for my bad english) I want run ppp connection when my usb modem is connect. so i use next udev rule: ACTION=="add", SUBSYSTEM=="tty", ATTRS{idVendor}=="16d8",\ RUN+="/usr/local/bin/newPPP.sh $env{DEVNAME}" (my modem appear in /dev as ttyACM0) newPPP.sh: #!/bin/bash /usr/bin/pon prov $1 >/dev/null 2>&1 & Problem: udev event fire, newPPP.sh running, BUT newPPP.sh process will be killed after ~4-5s. ppp not have time to connect. (in it params is timeout 10s for dial up). How can i run long time process, that will not be killed? (I was try nohup. It don't work too.) System: Arch Linux

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• Mirror network packets from WiFi to Ethernet in an ASUS Router RT N53

  - by fazineroso

  I have an ASUS RT N53 router, running the default firmware (Linux 2.6.22 with busybox and uclibc). I need to capture data packets from some Wi-Fi devices I have connected to that router (iPad and some smartphones), but the router is not forwarding any package coming from Wi-Fi devices to the Ethernet Ports. Any idea how can I proceed? Available tools in the router are iptables (no tee option, though), ebtables, brctl... Currently the ethernet and Wifi devices are forming a bridge: # brctl show bridge name bridge id STP enabled interfaces br0 8000.50465dc06be2 no vlan0 eth1 No ebtables rules: # ebtables -L Bridge table: filter Bridge chain: INPUT, entries: 0, policy: ACCEPT Bridge chain: FORWARD, entries: 0, policy: ACCEPT Bridge chain: OUTPUT, entries: 0, policy: ACCEPT

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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 do I get the current date according to an NTP server without setting it locally?

  - by Zac B

  I want to get the current date and time according to a remote NTP server, using Linux. I don't want to change the local time as a result; I just want to get the remote date, adjusted for the local time zone, printed out. The date returned must comply with the following criteria: It needs to be reasonably accurate. It needs to be adjusted for the timezone on the local system making the request. It needs to be formatted in an easily-readable or interpretable way (standard date format, or seconds since epoch). What I've Tried: I can call ntpdate -q my.ntp.server and get the offset between the local time and the server's time, but that doesn't return the date according to the NTP server; it just returns the offset and the local date. Is there some easy way/command I can use to say: "Print out the date according to a given NTP server, adjusted for my current timezone"?

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• Can't `mount -o loop` an ISO from an NFS share (RHEL)

  - by warren

  I have a large NFS share with a variety of software ISOs on it. I've only tried this on Red Hat Enterprise Linux, but when trying to do the following, the mount comes back with an error indicating no permissions to mount. Why would this be happening? NFS is mounted thusly: mediaserver:path/to/isos /media/nfs This is the mount call that fails mount -o loop /media/nfs/product.iso /tmp/product If I copy the ISO, there is no issue. The NFS share is mounted rw. How can I loop mount the ISO from the NFS share without copying it first?

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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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• Cannot access Nagios Web Interface

  - by Dominiqs

  After successfully installing Nagios core 3.4.1 (i also installed plug-in1.4.11) on our linux rhel 5.3 server i cannot login to the nagios web interface.I am running apache 2.2.3 I am using internet explorer 8 and also firefox 3.6.3 When i try to enter the url http//localhost/nagios/ on a desktop (on the same network as the Nagios server)it does seem to like it but if i try http//x.x.x.x/nagios/ (where x.x.x.x is the IP address of my nagios server) it likes it but then the authentication popup appears after entering the password and username(nagiosadmin) it throws the errors below The server x.x.x.x at Nagios access requires a username and password Warning this server is requesting that your username and password be sent in an insecure manner(basic authentication without a secure connection) After a few attempts i get error 401 authentication required error from internet explorer ;this server could not verify that you are authorized to access the document requested. Either you supplied the wrong credentials or your browser doesnt understand how to supply the credentials required. Help Please anyone..seems like an authentication issue

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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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• 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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• 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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• 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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• 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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• Operating Systems supported by the Intel SR1435VP2 Server Platform?

  - by Xspence

  I recently had two Intel SR1435VP2 Servers (with SE7320VP2 server boards) donated to me from a colleague. Google hasn't yielded much more than user manuals when searching for OS-compatibility answers. I have worked with flavors of Linux such as Ubuntu and Debian, but Intel only documents that they have tested proprietary operating systems such as SuSE, Solaris and Red Hat as documented on their driver downloads page. Has anyone worked with these machines before, and if so, do you know if the SR1435VP2/E7320 chipset supports OS's such as CentOS, Debian or Ubuntu? If you need more information or clarification, let me know. This is all new for me. Thanks in advance.

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• Under *nix, how can I find a string within a file within a directory ?

  - by roberto

  Hi all. I'm using ubuntu linux, and I use bash from with a terminal emulator every day for many tasks. I would like to know how to find a string or a substring within a file that is within a particular directory. If I was knew the file which contained my target substring, I would just cat the file and pipe it through grep, thus: cat file | grep mysubstring But in this case, the pesky substring could be anywhere within a known directory. How do I hunt down my substring ?

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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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