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• Sound plays on headphones and speakers with Lenovo ThinkPad L512 + Ubuntu 10

  - by Oscar Godson

  The only thing really missing from this install is this issue with the sound. I've searched all over the forums and i found one thing where you get the model and codecs and write them to a file, however, I can't seem to find what my "model" is because none of the postings have anything about Lenovo laptops. Here is the command they all asked for: Code: cat /proc/asound/card0/codec#* | grep Codec Codec: Realtek ALC269 Codec: Intel G45 DEVIBX With that info, how do I get the model, and how do I get my speakers to stop playing when headphones are plugged in. Also, I don't have any software installed like pulse audio either, so it's not that. Thanks so much to whoever can answer this... The Ubuntu forums are nearly useless... ive never gotten a correct answer back on that site.

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• What music streaming app fits my needs on Ubuntu?

  - by Jim

  I'm looking for an application to stream Internet radio on Ubuntu. I like listening to Radio Paradise while I work. Right now, I'm using Amarok. "Movie Player" sometimes refuses to open the stream, and VLC doesn't keep its window title updated with the currently playing track. Amarok has nice translucent notifications when tracks change, but track changes in streams don't trigger the notifications. Mostly, I want something that reliably opens streams and makes it easy to see the name of the track that's playing. If it has a built-in directory of streaming radio stations, that would be a big benefit.

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• Is disabling password login for SSH the same as deleting the password for all users?

  - by Arsham Skrenes

  I have a cloud server with only a root user. I SSH to it using RSA keys only. To make it more secure, I wanted to disable the password feature. I know that this can be done by editing the /etc/ssh/sshd_config file and changing PermitRootLogin yes to PermitRootLogin without-password. I was wondering if simply deleting the root password via passwd -d root would be the equivalent (assuming I do not create more users or new users have their passwords deleted too). Are there any security issues with one approach verses the other?

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• solr Security help

  - by Camran

  I have solr setup with Jetty on my Ubuntu server. On any computer now, I can type my_ip:8983/solr/ and the page will show upp to anybody. How can I disable this so that only I can access that port and the solr admin? Thanks

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• scsi and ata entries for same hard drive under /dev/disk/by-id

  - by John Dibling

  I am trying to set up a ZFS pool using 4 bare drives which I have attached to my Ubuntu system via a SATA hot swap backplane. These are Hitachi SATA drives. When I list the contents of /dev/disk/by-id, I see two entries for each drive: root@scorpius:/dev/disk/by-id# ls | grep Hitachi ata-Hitachi_HDS5C3030ALA630_MJ1323YNG0ZJ7C ata-Hitachi_HDS5C3030ALA630_MJ1323YNG1064C ata-Hitachi_HDS5C3030ALA630_MJ1323YNG190AC ata-Hitachi_HDS5C3030ALA630_MJ1323YNG1DGPC scsi-SATA_Hitachi_HDS5C30_MJ1323YNG0ZJ7C scsi-SATA_Hitachi_HDS5C30_MJ1323YNG1064C scsi-SATA_Hitachi_HDS5C30_MJ1323YNG190AC scsi-SATA_Hitachi_HDS5C30_MJ1323YNG1DGPC I know these are the same drives because I wrote down the serial numbers, and all the other drives in this system are either Seagate or WD. The serial number for the first one, for example, is YNG0ZJ7C. Why are there two entries here for each drive? More to the point, when I create my ZFS pool which one should I use; the scsi- one or the ata- one?

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• How do I configure a swap partition using swapspace

  - by jcalfee314

  I finally have the swapspace project installed and running (via init.d). The purpose is to have a dynamically re-sizing swap partition. I'm clueless however on how to use it. It has good documentation but just does not go into that last step. How to I configure a swap partition using swapspace? The process is probably the same for any 3rd party program that would provide a swap space implementation to the kernel. I know this was intended to run as a process because the project provides an init.d script.

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• blocking port 80 via iptables

  - by JoyIan Yee-Hernandez

  I'm having problems with iptables. I am trying to block port 80 from the outside, basically plan is we just need to Tunnel via SSH then we can get on the GUI etc. on a server I have this in my rule: Chain OUTPUT (policy ACCEPT 28145 packets, 14M bytes) pkts bytes target prot opt in out source destination 0 0 DROP tcp -- * eth1 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 state NEW,ESTABLISHED And Chain INPUT (policy DROP 41 packets, 6041 bytes) 0 0 DROP tcp -- eth1 * 0.0.0.0/0 0.0.0.0/0 tcp dpt:80 state NEW,ESTABLISHED Any guys wanna share some insights?

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• is there a way to run a command before puppet implements a change?

  - by Patrick

  I want to have puppet run a specific command before performing any type of change. I am aware of the prerun_command option in the main puppet.conf, but this is not what I'm looking for. I want the command to only run if something is about to change, not on every puppet run. Here's the scenario. Let's say I have a bunch of web servers behind a load balancer. I then want puppet to update the web site files. But in order to prevent issues where some files have been updated, but other files haven't, and the mixed versions causing problems, I want to take the server out of the load balancer pool. I could write a script which when run will tell the load balancer to remove the box from the pool. Then puppet can do the change, and use postrun_command to put the box back in the pool once complete. But I need a way to run that script to remove the server from the pool. The only solution I can think of is to keep 2 copies of the files on the box. One a staging copy, and when puppet updates that, use a notify action to trigger the removal script, and then copy from staging into the live location. But I was hoping for something a little more generic that would work on any change being performed (upgrading a package, restarting a service, creating a user, anything).

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• File command output is different for same file on diff machine

  - by Coka

  I get different output of file command on same file(checked inode) from different machines. One of the machines is with suse10 sp3 and the another - rhel4. machine1>file x.tcl x.tcl: ASCII English text machin2>file x.tcl x.tcl: data Even in vi editor same file look different from different machine. Any clue? One more thing - there's third machine suse10 sp3 works fine. Is this machine issue?

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• Checkpoint - Routing into the tunnel

  - by Fake4d

  I have a simple question for my checkpoint infrastructure. Do i have to route a net which i wanna access over a configured firewall VPN Tunnel. Explanation: I have two firewalls connected over a VPN which have several nets behind them. I need to access a new net at the other firewall and put them in their encryption Domain. Now here is the question: Do i have to route it in the operating system (SecurePlat)? Thanks!

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• Linux 3.12 disponible en version stable, avec des gains de performances et une réduction de la consommation d'énergie

  Linux 3.12 disponible en version stable avec des gains de performances et une réduction de la consommation d'énergieLinux Torvalds a annoncé via un message sur LKLM (Linux Kernel Mailing List) la sortie de la version stable du noyau Linux 3.12.Au menu des améliorations, un changement dans la façon de gérer la fréquence de fonctionnement du processeur de l'ordinateur (modification de l'algorithme CPUfreq governor) permettant des gains significatifs de performances et une réduction de la consommation...

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• Tmux installation problems

  - by RayQuang

  hI, I am trying to install the terminal multiplexer tmux on my Debian Lenny server so that I can have multiple terminals through ssh. However I have had a lot of difficulty installing it from the debian package, and by compiling it. When I try the package it says something about the wrong version of libc6, and when I compile it I get the following error: server.o: In function `server_start': server.c:(.text+0x273): undefined reference to `event_reinit' collect2: ld returned 1 exit status make: *** [tmux] Error 1 Help would be very much appreciated, RayQuang

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• Screen flicker during content update, especially in Firefox

  - by Denis Malinovsky

  I'm using Nouveau video driver for my NVIDIA GeForce 6150SE nForce 430 video-card with Ubuntu 10.04. Screen flickers frequently, especially when I'm loading pages with many images/banners in Firefox. I tried to use proprietary NVIDIA driver, but it behaves itself even worse. Nv driver doesn't work at all. I also filed a bugreport in launchpad if you need any additional information.

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• Debian or CentOS?

  - by Tres

  I am looking at using either Debian or CentOS for a production server and I've heard mixed reviews of each one. I've heard CentOS performs better under load, however I am aware that Debian has a much larger package repository. Personally, I am partial to Debian since I am less familiar with Red Hat distros, but wanted to reach out on Server Fault to see which I really should be using. Any ideas? Thanks!

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• sudoer scheme to allow useful access to another web developer yet retain future control of a virtual

  - by Tchalvak

  Background: Virtual Private Server I have a virtual private server that I'm looking to host multiple websites on, and provide access to another web developer. I don't care about putting too many constraints on him, though I wouldn't mind isolating the site that he'll be developing from other sites on the server that I will develop. The problem: retain control Mainly what I want is to make sure that I retain control over the server in the future. I want to reserve the ability to create/promote/demote and other administrative functions that don't deal with web software. If I make him an admin, he can sudo su - and become root and remove root control from me, for example. I need him not to be able to: take away other admin permissions change the root password have control over other security/administrative functions I would like him to still be able to: install software (through apt-get) restart apache access mysql configure mysql/apache reboot edit web development configuration type files in /etc/ Other Standard Setups would be happily considered I've never really set up a good sudoers file, so simple example setups would be very useful, even if they're only somewhat similar to the settings that I'm hoping for above. Edit: I have not yet finalized permissions, so standard, useful sudo setups are certainly an option, the lists above are more what I'm hoping I can do, I don't know that that setup can be done. I'm sure that people have solved this type of problem before somehow, though, and I'd like to go with something somewhat tested as opposed to something I've homegrown.

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• What's the reason to break HDD to few partitions for MDADM+LVM2?

  - by archer

  I'm using 2 HDDs each 1TB in size. I'm going to create MDADM+LVM2 over them. Initially I though about this partition layout: /dev/sda1 - 1Gb (boot) /dev/sda2 - 500Gb (md0) /dev/sda3 - 499Gb (md1) /dev/sdb1 - 1Gb (boot) /dev/sdb2 - 500Gb (md0) /dev/sdb3 - 499Gb (md1) md0 is going to be raid0 and md1 is going to be raid1 however, I found some info that this would be better to break each drive to more partitions (lets say 10 partitions 100Gb in size each). What's the reason of doing that?

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• Wireless performance on Ubuntu 9.10

  - by Brian

  Is there something I should do to my networking configuration in Ubuntu to better the performance of my wireless connection? I'm on a netbook dual-booting Windows 7 and Ubuntu 9.10. I pick up much stronger wifi signal when in Windows than Ubuntu. As soon as I boot Ubuntu, it will connect to the network with a stronger signal, and then loses signal very quickly. After it dies, I can't reconnect. I've tested this on a couple of different networks with the same outcome.

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• How to stop LDAP authentication in ubuntu?

  - by Kery

  My OS is Ubuntu 12.04 and use LDAP authentication. Now I meet a problem that another people want to access my system. But he is in another domain so he can't login. And I have no right to change this configuration in LDAP server. So I have to choose a workaround to solve this problem, for example close the LDAP authentication and use local authentication (I have root right in my system) or create another account which is not registered in LDAP server (I did this but can't change the created account password. The error is 'password reset by root is not supported'). Of course any other suggestion is appreciated! Than you in advance!

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• How expensive is a hostname in htaccess? Other solutions possible?

  - by Nanne

  For easy allow or disallowing of dynamic IP-adresses you can add them as a hostname in a .htaccess file. As I have read from: .htaccess allow from hostname? it does a reverse lookup on the connecting ip address, seeing if the response matches the allowed name. (Well, actually Apache is doing a double lookup, first a reverse lookup and then a forward lookup on the result of the reverse.) This is the reason we are currently not using dynamic-ip hostnames in the .htaccess: this "sounds" quite heavy: 2 extra lookups for every request. Is this indeed quite heavy, and would a reasonably busy server that is rather looking for less then more load get away with this :)? (e.g.: how does this 'load' compare to the rest? If a request is 1000 times more expensive then the lookups it might be negligible. otoh, it could be that final straw :) ) Are there other solutions? I can write a script that does a lookup of the hostname and put it in .htaccess files ofcourse, but this feels a bit like a hack.

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• Samba domain controller: remove 1 Windows client

  - by K B

  my domain is controlled by a Samba domain controller running on openSUSE 11.3. It manages other openSUSE boxes and some Windows 7 boxes. Now one harddisk of a Windows 7 computer crashed and I had to reinstall. I wasn't able to get the computer name ("Win26") of the broken PC out of the domain and so I couldn't add the reinstalled "Win26" to the domain again. So how can I remove the entry of the old "Win26" computer out of the domain controller, so that I can add the new "Win26" to the domain again? Is it one configuration file I have to edit and restart Samba? Which file would this be? Thanks in advance for your help! Regards, KB

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• SDcard /dev/sdb2 is apparently in use by the system; will not make a filesystem here

  - by user171223

  I divided my sdcard into 2 partitions, but It got an error and couldn't create a new partition. Error: /dev/sdb2 is apparently in use by the system; will not make a filesystem here! My /dev/sdb was not mounted, and the output of command lsblk was: cxphong@cxphong:~/Desktop$ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sr0 11:0 1 1024M 0 rom sda 8:0 0 465.8G 0 disk +-sda1 8:1 0 118.8G 0 part +-sda2 8:2 0 147.7G 0 part /media/DATA +-sda3 8:3 0 137.1G 0 part +-sda4 8:4 0 1K 0 part +-sda5 8:5 0 1023M 0 part [SWAP] +-sda6 8:6 0 61.2G 0 part / sdb 8:16 1 3.7G 0 disk +-sdb1 8:17 1 70.6M 0 part +-sdb2 8:18 1 3.6G 0 part +-sdb1 (dm-0) 252:0 0 70.6M 0 part +-sdb2 (dm-1) 252:1 0 3.6G 0 part I couldn't delete /dev/sdb1 (dm-0) & /dev/sdb2 (dm-1). What are they?

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• View all files with permission 777

  - by Webnet

  Is it possible for me to view all files on the server with a specific permission?

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• ACL permissions not behaving as expected

  - by Yarin

  I set the following ACL on my web directory: setfacl -R -d -m mask:002 /var/www and then created a file as root that I expected to be readable by the default (apache) group. -rw--w-r--+ 1 root apache 0 Dec 17 22:32 newfile.py When I run getfacl on the file, I get: # file: newfile.py # owner: root # group: apache user::rw- group::rwx #effective:-w- mask::-w- other::r-- I'm not sure how to read this- but all I know is that the webserver is throwing a permissions error because apache can't read the file. Can anyone explain what is going on here?

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• Tool to run same key strokes on multiple unix machines

  - by virtualvoid

  I want to run the same commands on multiple machines, I know I can do this using ssh scripting or things like clusterssh, however I don't want to install anything on the server. (Don't have the rights) What I want is to just clone the keystrokes across multiple machines e.g. run cat /etc/oratab on one window and same is run on multiple windows e.g. in putty, is there a tool to do that from a windows client.

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• Can I use Cygwin as a replacement for Ubuntu, for bash script testing?

  - by Jeroen De Meerleer

  Next wednesday i'm having an exam on Operating Systems. In this exam there will also be a part bash-scripting. The teacher itself will test the scripts in a Virtual Machine running Ubuntu. Myself, however, I'm having serious troubles with running the latest Ubuntu (14.04 LTS) on a Virtual Machine (there are troubles with gnome running very slow). So I'm thinking about using Cygwin, which is doing the job great for another course. The teacher already confirmed I can use that, but I'm thinking he doesn't know it at all. I've already tested the scripts we made in class and they're all running without errors. But I'm quite sure there are some things I have to mind on. My question: would you use Cygwin as a replacement for the Ubuntu VM? Or should I stick it with the VM (maybe by using a different config/platform).

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