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• Linux: Dropbox alternative with sftp/rsync/... access

  - by Daniel

  Currently on my VPS I'm running couple of sites and Dropbox daemon to store backups. Problem is that VPS has 512M RAM and it was enough until new version of Wordpress (I don't know why, but now it consumes more memory) so I have a really bad choice: either stop Dropbox daemon and backups or to buy more memory (not that expensive but still). So I'm looking for some way to rsync data into Dropbox or similar service or figure out how to make Dropbox consume less memory. Any ideas?

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• Linux Unable to Write to Directory Despite Permissions

  - by Nick Q.

  I'm trying to give myself permissions to /var/www/ however for some reason I am unable to do so. Currently what I'm facing is this: nick@server1:/var$ ls -l drwxrwxr-x 5 root wwwusers 232 Mar 15 19:31 www nick@server1:/var$ groups nick wwwusers nick@server1:/var$ mkdir www/trying mkdir: cannot create directory `www/trying': Permission denied I am running Ubuntu 10.04 LTS on a VPS and am used to running unix on my own machine so I may be doing something absolutely stupid, but I would like to be able to have the group wwwusers be able to write to www.

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• Hardening non-root standalone Linux Tomcat install

  - by NoozNooz42

  I want to know if you have any tips as to how to strengthen the security of a non-root install of Tomcat in standalone mode once Tomcat is already installed in a non-root account, in standalone mode. I precise this because, for example, I'm not at all interested by the answers given here (because both Java and Tomcat requires root priviledges there to be installed and I've got zero interest in running jsvc): http://serverfault.com/questions/43765 So far, here's what I've done for my non-root standalone Tomcat 6 install: download and install the JRE .bin provided by Oracle/Sun (no need to be root here) (no need for a full JDK anymore right seen that Jasper [Tomcat's JSP engine] has its own compiler now right?) download and tar -xzf tomcat 6 (no need to be root here) set up transparent port-forwarding (must be root here) Note that my distribution is a Debian one and I have exactly zero interest in downloading Debian package / backports / whatever... Because, once again, I DO NOT want to need to be root to install Java & Tomcat. The only moment I needed to be root was to configure the firewall to transparently do the port forwarding 80 <-- 8080 and 443 <-- 8443. I then deleted all the default webapps but one: cd ~/apache-tomcat-6.0.26/webapps rm -rf docs rm -rf examples/ rm -rf manager/ rm -rf ROOT/ What about the directory ~/apache-tomcat-6.0.26/webapps/host-manager, do I need it or can I delete it? So, once I've installed Tomcat standalone in a non-root account (and taken into account that I don't want to enter the root password anymore and that I don't plan to install the whole Apache shebang), what more can I do? Are there connectors I can disable? (how?)

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• fdisk (linux) partitioning raid0

  - by Silverrocker

  I'm trying to create partitions for a slackware instalation on my computer (beside Windows 7) just to have a nice distro running mostly for school but when I run fdisk and print the partitiontable I get the following message: Partition x does not end on cylinder boundary. (in my case x = 1, just using x to help googlers). I must say I'm using a raid card (AMCC 3ware 9500S SATA RAID Controller). Maybe this is the problem. How can I fix this without loosing any data?

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• Linux Experts Riddle: Network output of 10MB/s on 10GB/s NIC

  - by user150324

  I have two CentOS 6 servers. I am trying to transfer files between them. Source server has 10GB/s NIC nd destination server has 1GB/s NIC. Regardless to the command used nor the protocol, the transfer speed is ~1 Mega byte per second. The goal is at least couple dozens MB per second. I have tried: rsync (also with various encryptions), scp, wget, aftp, nc. Here's some testing results with iperf: [root@serv ~]# iperf -c XXX.XXX.XXX.XXX -i 1 ------------------------------------------------------------ Client connecting to XXX.XXX.XXX.XXX, TCP port 5001 TCP window size: 64.0 KByte (default) ------------------------------------------------------------ [ 3] local XXX.XXX.XXX.XXX port 33180 connected with XXX.XXX.XXX.XXX port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0- 1.0 sec 1.30 MBytes 10.9 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 1.0- 2.0 sec 1.28 MBytes 10.7 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 2.0- 3.0 sec 1.34 MBytes 11.3 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 3.0- 4.0 sec 1.53 MBytes 12.8 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 4.0- 5.0 sec 1.65 MBytes 13.8 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 5.0- 6.0 sec 1.79 MBytes 15.0 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 6.0- 7.0 sec 1.95 MBytes 16.3 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 7.0- 8.0 sec 1.98 MBytes 16.6 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 8.0- 9.0 sec 1.91 MBytes 16.0 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 9.0-10.0 sec 2.05 MBytes 17.2 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 1.68 MBytes 14.0 Mbits/sec I guess HD is not the bottleneck here.

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• How to block access to websites on a linux box [closed]

  - by user364952

  I'm just curious how many ways people can come up with to block access to a website. I simply intended to block (my own) access to news.ycombinator.com to stop my productivity drain. The first two methods I thought of were editing the hosts file to resolve news.ycombinator.com to 0.0.0.0 or adding a rule to iptables. iptables -A OUTPUT -d news.ycombinator.com -j REJECT Disclaimer: I do realise that the above two methods are easily by-passable. Doesn't help this is my own machine. What other ways does the internet know?

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• Installing and using 32-bit software in 64-bit Linux

  - by Isxek

  Is there a way to install and run i386 software packages inside an AMD64 version of Xubuntu (v9.10)? Just to get an idea, how much effort would it require to port it to something usable within the said OS. I imagine it would be a lot. Thanks! If you need more info (specs, etc.) let me know.

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• Linux file structure

  - by morpheous

  ok. I asked this question earlier(as part of another question) and got no response - so here it is again: what i the recommened directory for me to store the following: 1). my apps 2). development tools (C++ tools) 3). AMP applications for LAMP stack (Apache, MySQL, PHP) 4). files for websites that I develop on my machine - e.g. website1, website2 etc ...

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• Where is autorun in Linux(Ubuntu)?

  - by pukipuki

  I have the machine with Ubuntu desktop 7.something ... I want some server-like behavior without my participation. For example I have Azureus torrent-client there and I want it to start with the system like a service. Is it possible or I need another torrent-client?

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• Linux script to kill process listening on a particular port

  - by Evgeny

  I have a process that listens on a TCP port (?0003). From time to time it crashes - badly. It stops working, but continues hogging the port for some time, so I can't even restart it. I'm looking to automate this. What I do right now is: netstat -ntlp |grep -P "\*\:\d0003" To see what the PID is and then: kill -9 <pid> Does anyone have a script (or EXE for that matter) that would link the two steps together, ie. parse the PID from the first command and pass it to the second?

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• Fetch videos from sony handycam to linux

  - by bstpierre

  I've got a Sony Handycam DCR-DVD101. When I plug connect the USB cable to my laptop (Ubuntu 10) it doesn't mount any storage device. If I run usb-devices, I see: T: Bus=02 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#= 6 Spd=480 MxCh= 0 D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=054c ProdID=00c1 Rev=01.00 S: Manufacturer=SONY S: Product=Storage Device C: #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=2mA I: If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=05 Prot=50 Driver=usb-storage The driver says usb-storage, but I'm not sure how to get the device mounted. Is there a way to make this work? Update: checking dmesg, I see: [259072.576559] usb 2-1.1: new high speed USB device using ehci_hcd and address 6 [259072.687200] usb 2-1.1: configuration #1 chosen from 1 choice [259072.836188] Initializing USB Mass Storage driver... [259072.836476] scsi5 : SCSI emulation for USB Mass Storage devices [259072.836632] usb-storage: device found at 6 [259072.836636] usb-storage: waiting for device to settle before scanning [259072.836660] usbcore: registered new interface driver usb-storage [259072.836666] USB Mass Storage support registered. [259077.830410] usb-storage: device scan complete [259077.832343] scsi 5:0:0:0: CD-ROM SONY DDX-A1010 R1.0 PQ: 0 ANSI: 0 [259077.888167] sr1: scsi3-mmc drive: 0x/0x pop-up [259077.888446] sr 5:0:0:0: Attached scsi CD-ROM sr1 [259077.888593] sr 5:0:0:0: Attached scsi generic sg2 type 5 [259080.002079] sr 5:0:0:0: [sr1] Unhandled sense code [259080.002085] sr 5:0:0:0: [sr1] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [259080.002091] sr 5:0:0:0: [sr1] Sense Key : Blank Check [current] [259080.002097] sr 5:0:0:0: [sr1] Add. Sense: No additional sense information [259080.002104] sr 5:0:0:0: [sr1] CDB: Read(10): 28 00 00 00 00 00 00 00 02 00 00 00 [259080.002117] end_request: I/O error, dev sr1, sector 0 [259080.002123] Buffer I/O error on device sr1, logical block 0 [259080.002128] Buffer I/O error on device sr1, logical block 1 Those I/O errors don't look good, is there any hope?

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• Installing MySQL-Ruby on Linux and Ruby 1.9.2

  - by Klam

  I am having an absurdly difficult time getting MySQL-Ruby to install on RedHat 4 using Ruby 1.9.2. I am behind a company proxy that prevents pretty much any package tool from connecting to external repositories so "gem install mysql" isn't going to cut it. I have tried installing the mysql-ruby gem locally but it fails with a mysterious: $gem install mysql-2.8.1.gem Building native extensions. This could take a while... ERROR: Error installing mysql-2.8.1.gem: ERROR: Failed to build gem native extension. /ns/local/apps/internal/SWS/MetricsPublisher/ruby/bin/ruby extconf.rb checking for mysql_query() in -lmysqlclient... no checking for main() in -lm... yes checking for mysql_query() in -lmysqlclient... no checking for main() in -lz... yes checking for mysql_query() in -lmysqlclient... no checking for main() in -lsocket... no checking for mysql_query() in -lmysqlclient... no checking for main() in -lnsl... yes checking for mysql_query() in -lmysqlclient... no checking for main() in -lmygcc... no checking for mysql_query() in -lmysqlclient... no *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. I have also tried building the module myself by following the included readme. The results: $ruby extconf.rb --with-mysql-include=/path_to_my_sql_headers/mysql/include/ --with-mysql-lib=/path_to_my_sql_lib/mysql/lib/ checking for mysql_query() in -lmysqlclient... no checking for main() in -lm... yes checking for mysql_query() in -lmysqlclient... no checking for main() in -lz... yes checking for mysql_query() in -lmysqlclient... no checking for main() in -lsocket... no checking for mysql_query() in -lmysqlclient... no checking for main() in -lnsl... yes checking for mysql_query() in -lmysqlclient... no checking for main() in -lmygcc... no checking for mysql_query() in -lmysqlclient... no *** extconf.rb failed *** Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check the mkmf.log file for more details. You may need configuration options. Does anybody have any ideas? Quite frankly, I don't even care if MySQL-Ruby specifically works, I just want ANY means of connecting to a MySQL DB through a ruby call in ruby 1.9. Thanks.

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• delete key on linux does not work

  - by Gauthier Fleutot

  Hi! My delete key does not work in ubuntu, it does nothing. I understand that this is a common problem, but I could solve it with the information I found elsewhere. I ran xev. Pressing the 'a' key gives: KeyRelease event, serial 30, synthetic NO, window 0x2c00001, root 0x1a6, subw 0x0, time 7255643, (-113,-107), root:(425,300), state 0x2010, keycode 38 (keysym 0x61, a), same_screen YES, XLookupString gives 1 bytes: (61) "a" XFilterEvent returns: False Pressing 'Delete' gives: FocusOut event, serial 30, synthetic NO, window 0x2c00001, mode NotifyGrab, detail NotifyAncestor FocusIn event, serial 30, synthetic NO, window 0x2c00001, mode NotifyUngrab, detail NotifyAncestor KeymapNotify event, serial 30, synthetic NO, window 0x0, keys: 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 From there I don't know what to do. Help?

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• Diagnosing linux issues with ipod syncing in Ubuntu

  - by alexpotato

  Issue: I am currently using Ubuntu 9.10 with a 5th generation Ipod 60 GB Black video classic. In general, it seems that Ubuntu can always detect the usb hd and displays it on my desktop. However, some applications seem to detect the ipod (e.g. Rythymbox and gtkpod do but Banshee does not) and some don't. I narrowed down the banshee issue to a bug that requires Nautilus to be restarted (although it would be nice to not have to do this). Also, Whenever I sync between these applications, it appears that everything is working fine during the sync but when I disconnect the ipod and browse, all of the songs seem to be there but the playlists are not. If I reconnect the ipod, in banshee specifically it sees the space usage as "other". What I am looking for is some way to at least understand what is and is not working OR directions to some where that can help me learn what's going on. I have already tried: -IRC. Either the channel is too general (e.g. #ubuntu) or no one is ever one (e.g. #banshee) -The web. Most of what I've found is too specific to one particular bug or too general. Any thoughts?

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• Software RAID 10 on Linux

  - by vpetersson

  For a long time, I've been thinking about switching to RAID 10 on a few servers. Now that Ubuntu 10.04 LTS is live, it's time for an upgrade. The servers I'm using are HP Proliant ML115 (very good value). It has four internal 3.5" slots. I'm currently using one drive for the system and a RAID5 array (software) for the remaining three disks. The problem is that this creates a single-point-of-failure on the boot drive. Hence I'd like to switch to a RAID10 array, as it would give me both better I/O performance and more reliability. The problem is only that good controller cards that supports RAID10 (such as 3Ware) cost almost as much as the server itself. Moreover software-RAID10 does not seem to work very well with Grub. What is your advice? Should I just keep running RAID5? Have anyone been able to successfully install a software RAID10 without boot issues?

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• Partitions on Linux and their CHS dependance

  - by FractalizeR

  Hello. Recently I came into a problem with partitioning WD20EARS disk (with 4k sectors). I needed partitions to be aligned correctly so I just used parted in "unit s" mode and started all partitions at mod8 sector (drive itself reports, that sector is 512b) and ended all of them at mod8-1 sector. But then I thought, that may be I should take into account also the cylinder boundaries (I've seen some posts on the net where fdisk complains about partitions not to start/end on cylinder boundary). And then... I thought, that if drive lies about it's sector size, may be it's lying about the whole geometry? Should I care about partitions to be aligned against cylinder boundaries? If so, how do I find these boundaries? I guess each drive model can contain different sectors per track/cylinder... Or sector alignment is all I should take care of?

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• Linux Kernel IRQ Routing with irqbalance / kernel options

  - by tim

  I'm trying to get my Xen Dom0 distributing the irqs in an smp enviroment. As far as I know there are 2 Options: Use irqbalance Configure the kernel without cpu hotplug support My System is Debian Squeeze, Xen 4.0.4, Kernel 3.2.31. My Problem is: irqbalance segfaults due to a changed /proc/irq* layout or irq0 missing (this seems to be a very old bug existing since Lenny) To configure a kernel without cpu hotplug support you must disable cpu powermanagement which seems to be impossible through the standard wys (make config / make menuconfig) - the option CONFIG_PM simply defaults to "Y". Any idea anyone on how to get a debian dom0 kernel with a proper irq distribution?

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• Buildcraft Minecraft mod causing crashes, NVIDIA-304xx Linux Drivers, KDE

  - by wolfo9999

  All is perfect, 96 fps average. Until an item tries to enter a buildcraft pipe. Tekkit instantly crashes, no error dialog. I have no idea what logs to look at for information on the crash, or how to fix it. OpenGL is enabled in KDE, Driver package is nvidia-304xx lspci output: VGA compatible controller: NVIDIA Corporation GT218 [Quadro FX 380M] (rev a2) (prog-if 00 [VGA controller]) Subsystem: Hewlett-Packard Company Device 172b Flags: bus master, fast devsel, latency 0, IRQ 16 Memory at d2000000 (32-bit, non-prefetchable) [size=16M] Memory at c0000000 (64-bit, prefetchable) [size=256M] Memory at d0000000 (64-bit, prefetchable) [size=32M] I/O ports at 5000 [size=128] [virtual] Expansion ROM at d3080000 [disabled] [size=512K] Capabilities: <access denied> Kernel driver in use: nvidia

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• Linux - Help, I'm running out of inodes!

  - by Rory McCann

  I have a filesystem that has lots of small files. Currently about 80% of inodes are used (I checked with df -i), however only 60% of disk space is used. How can I 'increase' the number of inodes? If it was just disk space, I know that I could just increase the size of the disk (this disk is on LVM). If I increase the size of the disk, will that make me have more inodes? I'm willing to grow the filesystem this disk is on, if that'd help.

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• Map /dev/bus/usb node to /sys node on Linux

  - by Cody Brocious

  I'm using libusb to find and access a USB device, but once I get the information I need from there, I need to map it to a /sys node. This could be to the actual USB bus it's on, the /sys/bus/usb-serial node (which is where I'm going to get eventually), or effectively anywhere else since I can walk the tree from there. I can get to a /dev/bus/usb node easily enough, but I'm a bit lost from there. What would be the best route to perform this mapping? Alternatively, a way to get the /dev/ttyUSB device node for a /dev/bus/usb node would work as well, since it gets me the same result.

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• Linux router and firewall with IP accounting

  - by Andrew

  I'm working on a project to replace my organisation's aging Slackware gateway/router/firewall machine in our colo rack. Previously we used rc.firewall but we are now looking for something more modern and easily configurable. The requirements are: Act as a gateway router & firewall Port forwarding to a Terminal Server in the colo IP/traffic accounting, preferably accessible via SNMP (already using cacti for other servers) Possibility of acting as a PPTP server & routing these connections Is not an out-of-the-box Cisco product (don't have the finances or support to maintain it) I'd prefer to use Ubuntu or some other Debian-based distro but something that integrates everything we're looking for is certainly an option if it offers all the desired features and is easy to configure. Is there a simple set of packages that will provide me with the Firewall & Accounting features, or am I best served with a custom-built distro / other solution?

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• fdisk (Linux) partitioning RAID 0

  - by Silverrocker

  I'm trying to create partitions for a Slackware installation on my computer (beside Windows 7) just to have a nice distribution running mostly for school but when I run fdisk and print the partition table I get the following message: Partition x does not end on cylinder boundary. (In my case x = 1, just using x to help googlers.) I must say I'm using a RAID card (AMCC 3ware 9500S SATA RAID Controller). Maybe this is the problem. How can I fix this without losing any data?

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• linux centos 5.6 someone installed irc

  - by Peter

  I need some help, my server provider contacted me to tell me my server was using 200mbit/s bandwidth. Upon investigation I found processes for a user that should not be there.. I found processes as follows: 26269 511 Nov27 ./stealth 58.22.68.253 53 775 511 Oct12 ./eggdrop -m botnick.conf I know eggdrop is IRC, my question is, where can I find out where the software has been installed for these processes?

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• Linux. Compare binary files

  - by frustratedCmpNoLongerUser

  I need to compare two binary files and get output in form for every different byte. So if file1.bin is 00 90 00 11 in binary form and file2.bin is 00 91 00 10 I want to get something like 00000001 90 91 00000003 11 10 what is the easiest way to accomplish the goal? Standard tool? Some 3rd party tool? inb4: cmp -l should be killed with fire,it uses decimal system for offsets and octal for bytes. "Consistency for losers" must be cmp's motto.

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• What Linux fits on a floppy disk?

  - by Peter Mortensen

  Which Linux'es fit on a 1.44 MB bootable floppy disk? Where can the .img image files be downloaded?

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