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• Trying to unpack 2.5GB .tar.gz file on Linux but getting "An error occurred while trying to open the archive"

  - by TMM

  Hi, Is there a limit on Linux for the file size of a .tar.gz (or its contents). I am currently creating a .tar.gz (both through the UI/"Compress As" and also through the command line) file for 2 files (6GB and 2GB), and even though it is created successfully, when I try to unpack it using Ark it throws the error "An error occurred while trying to open the archive". I have seen some places that it might be better to archive the file into several smaller .tar.gz files, but I was wondering exactly how to do this (and subsequently unpack the files). Also, is it totally impossible to use the 1 .tar.gz file approach as this would be much simpler. Thanks in advance, Tim

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• Windows 7 and ocx installation

  - by Naren

  I am having one application which runs on XP very well. What it does is it downloads some files from server and register one ocx object. In XP after installing I am able to see the entry in the RegEdit with name of that ocx component. But same thing I tried on the Windows 7 and its not registering that ocx component. I having same access rights as XP on windows 7. I am unable to find any entry in RegEdit. I tried installing it manually by Running Command Prompt As Administrator then it installs successfully.. How can I do it automaticallly as it works in XP? Thanks for the help.

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• How do I allow users to execute commands via ssh without allocating a pseudo-terminal

  - by Dani El

  I need to allow users to run a limited set of commands. But not to allow them to create interactive sessions. Just like GitHub does. If you try to ssh without a command it greetings you and close the session. I can acquire this by using ForceCommand some-script But getting in some-script i then need to eval user's input. Perhaps any other NoTTY-like option in sshd_config? --- UPDATE --- i'm looking for a pure SSH / Bash solution, not Perl/Python/etc. hacks.

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• How do I set logfile rotation limit for CF8 -out logs?

  - by melikeum

  I'm trying to set the number of logs to keep for the CF -out logs. I found a jrunsvc command line switch to set this but it throws an error saying the value must be at least 1000: jrunsvc.exe -logfileRotationLimit 50 "ColdFusion 8 Application Server" Error: log file rotaion limit must be at least 1000 The default is 200 files which seems excessive but 1000 is even worse. Am I not understanding this value properly? I did set it to 1001 and then I found this registry entry: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\ColdFusion 9 Application Server\LogFileRotationLimit I'm hesitant to set it there manually in case the value does not equal the number of files to keep.

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• Download or view a servers wins database

  - by Segfault

  I am trying to troubleshoot a WINS browsing problem in a Server 2008 AD Forest. I am in one domain and the problem is with a sibling domain. What command can i use to dump or view the WINS database on a particular AD server by name, in a different domain than me? I thought one of the subcommands of net would have an option for this, but I can't find it. I also tried browstat.exe getblist but it gives me an error message "The list of servers for this workgroup is not currently available". I am not a domain admin and don't have any rights to the either domain other than a normal user. Anyone know how this can be done?

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• Allow non-sudo group to control Upstart job

  - by Angle O'Saxon

  I'm trying to set up an Upstart job to run on system startup, and that can also be started/stopped by members of a group other than sudo. With a previous version, I usedupdate-rc.d and scripts stored in /etc/init.d/ to get this working by adding %Group ALL = NOPASSWD: /etc/init.d/scriptname to my sudoers file, but I can't seem to get an equivalent working for Upstart. I tried adding %Group ALL = NOPASSWD: /sbin/initctl start jobname to the sudoers file, but trying to run the command start jobname produces this error: start: Rejected send message, 1 matched rules; type="method_call", sender=":1.21" (uid=1000 pid=5148 comm="start jobname " interface="com.ubuntu.Upstart0_6.Job" member="Start" error name="(unset)" requested_reply="0" destination="com.ubuntu.Upstart" (uid=0 pid=1 comm="/sbin/init") As near as I can tell, that's a complaint about how my user account isn't given the power to send 'Start' messages in the D-Bus config file for Upstart. I haven't been able to actually find any information on how to edit that file to give a group permission to access a specific service--does such an option exist? Is there a way to edit the Sudoers file so I can run the job without editing the config file? Am I better off just sticking with the previous version?

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• How do I mount a sparse disk image permanently?

  - by Mike

  On Mac OS X 10.6.7, when I mount a sparse disk image (either by double-clicking it or using hdid from the command line), the image: Appears on my desktop Needs to be re-mounted every time I log in I'd like to set up the equivalent of an /etc/fstab which will mount the image when the system boots, and make it permanent - so I don't have to worry if my symbolic links will resolve or not. Is this more trouble than it's worth on a Mac? I noticed that there is no /etc/fstab, and /etc/fstab.hd contains a dire warning: IGNORE THIS FILE. This file does nothing, contains no useful data, and might go away in future releases. Do not depend on this file or its contents. I tried sudo hdid -notremovable <image>, which seemed like half of what I wanted (according to man hdid), but it failed with an error: hdid: attach failed - no mountable file systems.

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• afp/smb transfers caps at 2 megabytes/sec, wireless N

  - by RD.

  I wanted to transfer files between two mac computers. The network is wireless-N and both computers have wireless-N modules in them. The problem is that when I transfer files between them, via file sharing (afp) the network speed caps at 2 megabytes/sec. Just downloading files from the internet I can get faster speeds, so this isn't a constriction of my wifi bandwidth, it appears to be a constriction of the protocol being used. My wifi-n is set to 130mbits, so I should see real world transfer speeds around 12-16 megabytes/sec I did this command on both computers sudo sysctl -w net.inet.tcp.delayed_ack=0 which is supposed to lower tcp overhead, but this did not affect it. How can I get the speed I am expecting?

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• getaddrinfo(3) failed

  - by user101289

  I'm trying to connect to a webservice using a PHP wrapper (which is using curl under the covers). On my local linux machine running PHP 5.3 it works perfectly. However, when I move to a remote server (also running PHP 5.3 on Linux) the call the the webservice URL returns: getaddrinfo(3) failed for http://server.host.com:8080/login I get a similar error from a ping on the remote host: ping: unknown host http://server.host.com:8080/login But when I issue a curl request from the command line, it returns the expected URL. Can anyone shed any light on this issue? Thanks!

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• Convert old videos to have smaller sizes

  - by Tim

  I have some videos from a few years ago,with various formats, such as avi, mpg, wmv, rm, rmvb, .... Their sizes are huge(more than 500 MB, and sometimes 1GB). Given there may likely be some advance in data compression, I would like to know which file formats and compression methods are recommended these days, by the standard that without losing obvious data, while achieving big size reduction. How can I perform the file format conversion and data compression in Ubuntu 12.04? Command line and batch ways would be the most convenient, although GUI ways are also appreciated. Thanks and regards!

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• htaccess and htpasswd trouble

  - by hjpotter92

  This is the first time that I have ever tried working with .htpasswd and .htaccess files, so please point out my childish works. I have my apache document root set to /www/ on my debian server. Inside it, there's a folder named Logs/ which I want to restrict access using a htpasswd. I created my htpasswd file using the shell's htpasswd command. And this is the result: > user:<encoded password here> > hjp:<encoded password here> > hjpotter92:<encoded password here> I put this file named .htaccess inside /www/. The Logs/ has following htaccess file in it: > AuthName "Restricted Area" > AuthType Basic > AuthUserFile /www/.htpasswd > AuthGroupFile /dev/null > require valid-user This was again created using an online tool(I forgot its name/link, and can't search the browser-history now). The problem, as it might've already struck you is that I am experiencing no change on my Logs folder access. The folder is still accessible to everyone. I am running apache as root user(if that matters/helps). Please help/guide me. I've tried reading some htaccess guides and have followed some of older SO questions, but still haven't figured out a way to restrict access to Logs folder with a password.

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• Disable prompts while installing a Debian package

  - by VictorTuenti

  Hello all, How can i disable totally the prompts that appear while installing a Debian package, i've used all the options that i've found but there are some packages that are still prompting. I'm using this command: apt-get -y --allow-unauthenticated --force-yes -o DPkg::Options::="--force-overwrite" -o DPkg::Options::="--force-confdef" install x11-common Why the x11-common package is still prompting? how can i get rid of these prompts? Thanks in advance --Victor Edit: just to clarify, the prompts are not "yes/no" prompts, are open questions in a coloured screen (typical two color screen) but i want to set the default option of these questions

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• Why does Exim puts emails on hold if there are frozen messages in the queue?

  - by user51932

  I've a CentOS with CPanel server working as a SMTP server, which currently uses 20 different hostnames and IP addresses to deliver email for an email newsletter service. However, it's extremely slow in sending emails. It's sending like 10 emails per minute, which I check by running the "exim -bpc" command. What could be affecting this? One thing I'm supposing, is that there are frozen messages in the queue, which are slowing down the sending until they're sent out, and are putting new messages on hold. What are the most common reasons a message can get frozen? Also, would it be more efficient to use 20 different small VPSs to send out email rather than use one large VPS with the 20 different hostnames and IPs in it?

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• How do you synchronise huge sparse files (VM disk images) between machines?

  - by chrisdew

  Is there a command, such as rsync, which can synchronise huge, sparse, files from one linux server to another? It is very important that the destination file remains sparse. It may be longer (but not bigger) than the drive which contains it. Only changed blocks should be sent across the wire. I have tried rsync, but got no joy. groups.google.com/group/mailing.unix.rsync/browse_thread/thread/94f39271980513d3 If I write a programme to do this, am I just reinventing the wheel? http://www.finalcog.com/synchronise-block-devices Thanks, Chris.

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• File/folder Write/Delete wise, is my server secure?

  - by acidzombie24

  I wanted to know if someone got access to my server by using a nonroot account, how much damage can he do? After i su someuser I used this command to find all files and folders that are writeable. find / -writable >> list.txt Here is the result. Its most /dev/something and /proc/something and these /var/lock /var/run/mysqld/mysqld.sock /var/tmp /var/lib/php5 Is my system secure? /var/tmp makes sense but i am unsure why this user has write access to those folders. Should i change them? stat /var/lib/php5 gives me 1733 which is odd. Why write access? why no read? is this some kind of weird use of a temp file?

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• linux intrusion detection software

  - by Sam Hammamy

  I have an Ubuntu VPS that I use for practice and deploying prototypes as I am a python developer. I recently started teaching my self sys admin tasks, like installing OpenLDAP. I happened to turn off the ufw firewall for just a minute, and when I ran an netstat command, I saw a foreign ip connected to ssh that I traced to china. I'd like to know a few things: 1) Is there any good network intrusion detection software, such that if any IP that's outside a specific range connects to the VPN, I can be notified? -- I am thinking about scripting this, but I'm pretty sure there's something useful out there and I believe in the wisdom of crowds. 2) How did this person gain access to my server? Is it because my firewall was down? Or is it because they browsed my LDAP directory and from there figured out a way to connect (there was a clear text password in the tree but it wasn't one used by the server's sshd)?

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• Want shortcut to OpenVPN GUI connect in Windows 7 (without going through the system tray)

  - by Leo Alekseyev

  I am running OpenVPN with OpenVPN GUI under Windows 7 x64. Currently, to connect I need to right-click the OpenVPN icon in the system tray and select "connect", which brings up the password prompt. What I want: some sort of a batch file or a shortcut that can be invoked to initiate OpenVPN connection. Motivation: I prefer running my system keyboard driven; I usually hide my taskbar and don't like needlessly fishing in the system tray. Currently, OpenVPN is the only program that forces me to interact with the taskbar. Surely there is an alternative approach, possibly invoking some command line trickery and/or autohotkey, but so far I haven't been able to find it.

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• how to setup a ssh acount with no terminal but port forwarding?

  - by admalledd

  I am trying to set up a new user account I can give to friends so they can SSH into my forward computer, and only allow forwarding of certain ports. I do not want my friends to have a shell, or be able to change what ports to where they are allowed to forward. example session: joe(friend) connects using PuTTY (that I have pre-set, he isn't good with computers) to example.com(my Internet facing computer) forwarding ports 8080,1990,25565 to him(with what ever end ports he wants, preferably they stay the same numbers) example ssh command to do similar (but he can still change the ports on my computer!) ssh -N [email protected] -p443 -L8080:192.168.1.2:8080 -L1990:127.0.0.1:1990 -L25565:127.0.0.1:25565 then, same story with other friend smith(same ports, same user even) except he is using linux, so cant use putty. is it possible to also leave default SSH functinality for all other users but this one? I found this when I was searching google, but alas, I did not quite understand what was being suggested, and I don't think they covered restricting port forwarding

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• No audio in Google Chrome

  - by Z9iT

  I started with Ubuntu 12.04 Minimal. Then installed only 3 utils sudo apt-get install xorg xinit google-chrome-stable alsa-base alsa-utils alsa-oss I have added google-chrome to .xinitrc file. Used sudo alsamixer to unmute everything using M. Also I am able to hear sound when I run this independently in a terminal sudo aplay /usr/share/sounds/alsa/Front_Center.wav However Google Chrome is not giving any sound output be it on youtube or the same file (/usr/share/sounds/alsa/Front_Center.wav) opened by browsing in chrome. UPDATE : the moment i install some Desktop (display) Manager like gnome or lxde and launch chrome then, the audio is perfect success. However if i kill the xsession and the desktop manager (lxde) AND then start with loading only the chrome (without DM) then again i loose the sound. This makes me wonder that there is something which is not allowing the sound to be loaded into chrome directly, but once the session like lxde loads, then it works flawless. I am thinking that i should rather ask, how to authorize google-chrome to use sound software? Miscellaneous : I am surprised to know that I cannot start google-chrome by sudo command (it asks to be a normal user) && that i cannot start alsamixer as a normal user (i must use sudo alsamixer ) May someone please help what i need to do so that google chrome speaks????

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• Will the Driver Support for Intel HD Graphics be Improved in 12.10?

  - by Hiranya

  I recently installed Ubuntu 12.04 on a HP Pavilion dv4 laptop. This is a core i7 machine with Intel HD graphics and also a separate nVidia VGA card. I had a lot of issues getting Ubuntu 12.04 working on this system. First there were issues booting up the live CD for installation. I worked around that by using the 'nomodeset' option. Then I continued to have similar issues after installation has completed. So I had to permanently add the nomodeset option to my GRUB boot configuration. At the moment I have a working installation but there are many issues: Ubuntu GUI is a bit flaky at times. The mouse pointer goes on and off when hovering over certain icons. Certain things doesn't get rendered properly on the screen. I can't access any of the tty consoles. Hitting Ctrl+Alt+F[1-6] gives me a blank screen. And once that happens I can't even come back to the UI by hitting Ctrl+Alt+F7. I've realized that tty consoles are actually working. I just can't see the text. If I enter a command like 'sudo reboot' into the empty screen the machine reboots. Can't get external displays (monitors, projectors etc) working. But I think this is probably because the VGA out is wired to the nVidia card which is not being used by Linux. colord program crashes every now and then triggering a popup message. So my main question is, will the support for Intel HD graphics be improved in the next release? Or will I have to keep using the nomodeset option in the new release too? Also I appreciate if anybody can shed some light on any of the issues listed above. Thanks in advance.

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• Hardware issues on Samsung NF208 (NF210)

  - by KristoferA - Huagati.com

  I'm trying to get Ubuntu 10.10 running on my wife's Samsung NF208 (same spec as NF210, but shipped without OS), and I have run into a pile of problems: At first, there were problems with audio, display brightness, and WiFi, so I reinstalled Ubuntu from scratch. After reinstalling, the audio has started working but the WiFi loses network access all the time and then it takes 5-10 minutes for it to reconnect to the network. Also, display brightness is at its lowest. I have tried to use the brightness command but it won't run. Is this system utterly incompatible with Ubuntu, or are there working WiFi and display drivers for it somewhere? I have googled for days but haven't found anything useful. Help me. Update: I never got it working properly. I came across lots of useful tips and tricks over at the forum linked to in the accepted answer but I just wasn't able to get it working and stable enough for the intended use. Hopefully a future version of Ubuntu and/or the samsung tools will solve that. Related thread over at the other forum: http://www.voria.org/forum/viewtopic.php?f=3&t=682

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• How can I disable the purple bootloader splash at boot?

  - by wim

  This question has been answered before, but neither of the methods in the accepted answer worked for me on 11.10. First I tried editing in /etc/default/grub, and then running sudo update-grub. But after that I still got a blank, plain, purple screen while the kernel is loading. The screen has no boot options, and it obscures those dmesg that I want to see going in the terminal. Next I tried removing the plymouth-theme-*, but that just broke my gnome-shell theme looks, and the purple screen still remains. I have also tried configuring it with startupmanager package, but nothing seems to get rid of that darned purple splash. here are the contents of my /etc/default/grub file: # If you change this file, run 'update-grub' afterwards to update # /boot/grub/grub.cfg. # For full documentation of the options in this file, see: # info -f grub -n 'Simple configuration' GRUB_DEFAULT="0" GRUB_HIDDEN_TIMEOUT="0" GRUB_HIDDEN_TIMEOUT_QUIET="true" GRUB_TIMEOUT="0" GRUB_DISTRIBUTOR="`lsb_release -i -s 2> /dev/null || echo Debian`" #GRUB_CMDLINE_LINUX_DEFAULT="" GRUB_CMDLINE_LINUX_DEFAULT="" GRUB_CMDLINE_LINUX="" # Uncomment to enable BadRAM filtering, modify to suit your needs # This works with Linux (no patch required) and with any kernel that obtains # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...) #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef" # Uncomment to disable graphical terminal (grub-pc only) # GRUB_TERMINAL="console" # The resolution used on graphical terminal # note that you can use only modes which your graphic card supports via VBE # you can see them in real GRUB with the command `vbeinfo' #GRUB_GFXMODE="640x480" # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux #GRUB_DISABLE_LINUX_UUID="true" # Uncomment to disable generation of recovery mode menu entries #GRUB_DISABLE_RECOVERY="true" # Uncomment to get a beep at grub start #GRUB_INIT_TUNE="480 440 1" GRUB_DISABLE_OS_PROBER="true"

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• Pass parameters to a script securely

  - by codeholic

  What is the best way to pass parameters to a forked script securely? E. g. passing parameters through command line operands is not secure, since someone who has an account on the host can run ps and see them. Unnamed pipe is quite secure, as far as I understand, isn't it? I mean, passing parameters to STDIN of the forked process. What about passing parameters in environment vars? Is it secure? What about passing parameters by other means I didn't mention?

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• How to make scp copy hidden files?

  - by rascher

  I often use SCP to copy files around - particularly web-related files. The problem is that whenever I do this, I can't get my command to copy hidden files (eg, .htaccess). I typically invoke this: scp -rp src/ user@server:dest/ This doesn't copy hidden files. I don't want to have to invoke this again (by doing something like scp -rp src/.* ... - and that has strange . and .. implications anyway. I didn't see anything in the scp man page about an "include hidden files". How can I accomplish this?

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• can not access dlink 604 set up interface

  - by user36089

  Hello everyone I used dlink-di604 enthernet board as router to share web access. My ISP provides the service base on Ethernet rathern than base on Ethernet pppoe mode. It is manually setup ipv4, subnet mask , DNS, Gateway etc Log in using web user name&password. I use http://192.168.0.2 try to access dlink di604 setup inferface, but failed I call command ipconfig /all Dos shell displayed: Ethernet adapter Local Connection: Physical Address: 00-3c-56-79-19-49 IPv4 address:10.7.8.225 subnet mask: 255.255.255.0 default gate way: 10.7.8.1 DNS servers 10.10.10.10 What is the correct way to access dlink 604 setup interface and set to share web access? Welcome any comment Thanks interdev

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