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• Second vm not connecting to internet KVM

  - by potsed

  I cannot connect a second VM to the internet. I have two VM's set up and running, the first vm can connect to the Internet fine, the second does not even get a ping through. They are both set up in the same way with the same base packages but different secondary packages. Different sized disks etc. I am a noob with VM and perhaps I am missing something very simple. Like maybe that they have the same mac address or something. They are both using a bridged connection. Any help would be appreciated, and if you need logs please let me know which ones.

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• Is it possible to configure Ubuntu as a software firewall?

  - by user3215

  I have some systems running on Ubuntu in the private IP range 192.168.2.0-255 . These systems are connected to a switch and the switch is connected to the ISP's modem. Neither the switch nor the modem support firewall options. I don't have any firewall device and I'm not willing to individually configure firewalls on all the systems (via gui/iptables). Is it possible to make an Ubuntu system into something like a software firewall, so that all the traffic/packets sent to or from the WAN(internet) would be allowed/denied based on its firewall rules?

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• How to wipe free disk space in Linux?

  - by Alex B

  When a file is deleted, its contents may still be left in the filesystem, unless explicitly overwritten with something else. "wipe" can securely erase files, but does not seem to allow erasing free disk space not used by any files. What should I use to achieve this?

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• How to upgrade Nginx?

  - by jwerre

  I'm on Ububtu and I'm trying upgrade Nginx 1.0.5 to the latest version 1.2.6. Here's what I did and what didn't work. $ nginx -v nginx: nginx version: nginx/1.0.5 $ curl -O http://nginx.org/download/nginx-1.2.6.tar.gz $ tar xvzf nginx-1.2.6.tar.gz $ cd nginx-1.2.6/ $ ./configure $ make && sudo make install $ nginx -v nginx: nginx version: nginx/1.0.5 <<< still old version!!! Any ideas would be much appreciated. Thanks.

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• Firefox: Is it possible to disable exit alerts?

  - by Hayek

  Sometimes the website will show an alert box akin to "Are you sure you want to leave?" when you try to leave the site. Is it possible to disable this from happening, without using something like the NoScript extension?

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• NGINX SSL Certificate Not Working

  - by LeSamAdmin

  I've been working on SSL stuff and getting nowhere from like 4 tutorials... I've bought an SSL for pingrglobe.com, and now trying to apply it to my servers. Here's my nginx code: http { server { listen 80; server_name pingrglobe.com; rewrite ^(.*) http://www.pingrglobe.com$1 permanent; } server { listen 443; ssl on; ssl_certificate /etc/nginx/ssl/pingrglobe.crt; ssl_certificate_key /etc/nginx/ssl/pingrglobe.key; #enables SSLv3/TLSv1, but not SSLv2 which is weak and should no longer be used. ssl_protocols SSLv3 TLSv1; #Disables all weak ciphers ssl_ciphers ALL:!aNULL:!ADH:!eNULL:!LOW:!EXP:RC4+RSA:+HIGH:+MEDIUM; server_name www.pingrglobe.com; root /var/www/pingrglobe.com; index index.html index.php; location / { try_files $uri $uri/ @extensionless-php; add_header Access-Control-Allow-Origin *; } rewrite ^/blog/blogpost/(.+)$ /blog/blogpost?post=$1 last; rewrite ^/viewticket/(.+)/(.*)$ /viewticket?tid=$1&$2 last; rewrite ^/vemail/(.+)$ /vemail?eid=$1 last; rewrite ^/serversettings/(.+)$ /serversettings?srvid=$1 last; rewrite ^/notification/(.+)$ /notification?id=$1 last; rewrite ^/viewreport/(.+)$ /viewreport?srvid=$1 last; rewrite ^/removeserver/(.+)$ /removeserver?srvid=$1 last; rewrite ^/staffviewticket/(.+)/(.*)$ /staffviewticket?tid=$1&$2 last; rewrite ^/activate/(.*)/(.*)/(.*)$ /activate?user=$1&code=$2&email=$3 last; rewrite ^/activate2/(.*)/(.*)/(.*)$ /activate2?user=$1&code=$2&email=$3 last; rewrite ^/passwordtoken/(.+)/(.*)/(.*)$ /passwordtoken?user=$1&token=$2&email=$3 last; location ~ \.php$ { try_files $uri =404; fastcgi_pass unix:/var/run/php5-fpm.sock; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; include fastcgi_params; } location @extensionless-php { rewrite ^(.*)$ $1.php last; } location ~ /\. { deny all; } } } SSL doesn't work as you see here: https://www.pingrglobe.com

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• Does Gedit have cool keyboard shortcuts?

  - by Kelp

  I have used Vim before and I love the keyboard shortcuts, but I hate having to copy and paste, so I am looking for a text editor that makes it easier. I have been trying Gedit. It's cool. But I really miss the being to create a new line, going to the end of the line, going to the beginning of the line, deleting a line with keyboard shortcuts. I tried to look up "gedit keyboard shortcuts" but all it came up with was how to save a file. Basic things.

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• L'iPad tente déjà de rattraper Android en terme de trafic internet, mais l'OS mobile de Google résis

  Mise à jour du 16/04/10 L'iPad génère déjà autant de trafic internet que BlackBerry Et tente de rattraper Android, mais l'OS de Google résiste Selon les mesures de NetApplications, l'iPad aurait déjà rejoint (voire dépassé) les smartphones de Blackberry. La tablette serait même sur le point de talonner le score des téléphones embarquant Android comme système d'exploitation. L'iPad représenterait en effet aux alentours de 0,04 % du trafic internet global. Un chiffre à comparer avec les 0,04 % de RIM (l'OS des Blackberry) et à mettre en perspective avec les 0,07 % d'Android (l'OS mobile de Google). Rappelons que l...

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• Can't recover hard drive

  - by BreezyChick89

  My drive got corrupt after a thunderstorm. It used to be 1 partition of 2.5tb but now it shows 2 partitions. It's weird because 300gig free space is about how much it had before corrupting, but it was part of the first partition. I tried $ sudo resize2fs -f /dev/sdb1 Resizing the filesystem on /dev/sdb1 to 536870911 (4k) blocks. resize2fs: Can't read an block bitmap while trying to resize /dev/sdb1 Please run 'e2fsck -fy /dev/sdb1' to fix the filesystem after the aborted resize operation. sudo e2fsck -f /dev/sdb1 e2fsck 1.42 (29-Nov-2011) The filesystem size (according to the superblock) is 610471680 blocks The physical size of the device is 536870911 blocks Either the superblock or the partition table is likely to be corrupt! Abort? n .... Error reading block 537395215 (Invalid argument) while reading inode and block bitmaps. Ignore error<y>? yes Force rewrite<y>? yes Error writing block 537395215 (Invalid argument) while reading inode and block bitmaps. Ignore error<y>? yes ... A lot of these. I can't use e2fsck -y because the first question aborts if I say "y". If I put a weight on the 'y' key it fails because none of the errors were really fixed. I asked this question before and tried using gparted but gparted fails because the first thing it does is: e2fsck -f -y -v /dev/sdb1 giving the same error. The disk status says healthy. There are no bad blocks. This is very frustrating because I can see the data in testdisk and it looks like it's all there. I already bought another 2.5tb drive and made a clone using dd. The next step if I can't fix this is to wipe that drive and just move the data with testdisk, but it seems certain folders will copy infinitely until the drive is full because of symlinks or errors so it's also a difficult option. sudo fdisk -l Disk /dev/sdb: 2500.5 GB, 2500495958016 bytes 255 heads, 63 sectors/track, 304001 cylinders, total 4883781168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x0005da5e Device Boot Start End Blocks Id System /dev/sdb1 * 2048 4294969342 2147483647+ 83 Linux sudo badblocks -b 4096 -n -o badfile /dev/sdb 610471680 536870911 badfile is empty I also tried changing the superblock with "fsck -b" but all of them are the same.

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• Finding documentation for /etc/**/*.dpkg-*

  - by intuited

  During upgrades, files with these extensions appear in /etc and its subdirectories. I gather that *.dpkg-dist contains the file that was distributed with the currently-installed version of a package, and *.dpkg-new contains the version from the version being installed, however I'd like to see the docs to be sure that I'm getting it right. Also there are occasionally other similarly named files, eg *.dpkg-original, and I'd like to be able to read up on these. I've checked /usr/share/doc/dpkg for documentation on this, and come up empty; there's no dpkg-doc package; Google doesn't have anything except unanswered questions. Can someone point me to the documentation for this aspect of debian package management?

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• Chrome Automatically Installs Google Repository in Ubuntu

  <b>Tech Drive-in: </b>"It goes something like this 'Installing Google Chrome will add the Google repository so your system will automatically keep Google Chrome up to date'."

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• How to set up an rsync backup to Ubuntu securely?

  - by ws_e_c421

  I have been following various other tutorials and blog posts on setting up a Ubuntu machine as a backup "server" (I'll call it a server, but it's just running Ubuntu desktop) that I push new files to with rsync. Right now, I am able to connect to the server from my laptop using rsync and ssh with an RSA key that I created and no password prompt when my laptop is connected to my home router that the server is also connected to. I would like to be able to send files from my laptop when I am away from home. Some of the tutorials I have looked at had some brief suggestions about security, but they didn't focus on them. What do I need to do to let my laptop with send files to the server without making it too easy for someone else to hack into the server? Here is what I have done so far: Ran ssh-keygen and ssh-copy-id to create a key pair for my laptop and server. Created a script on the server to write its public ip address to a file, encrypt the file, and upload to an ftp server I have access to (I know I could sign up for a free dynamic DNS account for this part, but since I have the ftp account and don't really need to make the ip publicly accessible I thought this might be better). Here are the things I have seen suggested: Port forwarding: I know I need to assign the server a fixed ip address on the router and then tell the router to forward a port or ports to it. Should I just use port 22 or choose a random port and use that? Turn on the firewall (ufw). Will this do anything, or will my router already block everything except the port I want? Run fail2ban. Are all of those things worth doing? Should I do anything else? Could I set up the server to allow connections with the RSA key only (and not with a password), or will fail2ban provide enough protection against malicious connection attempts? Is it possible to limit the kinds of connections the server allows (e.g. only ssh)? I hope this isn't too many questions. I am pretty new to Ubuntu (but use the shell and bash scripts on OSX). I don't need to have the absolute most secure set up. I'd like something that is reasonably secure without being so complicated that it could easily break in a way that would be hard for me to fix.

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• 2 Web Servers, 2 Domains, 1 WAN IP configuration

  - by Tillman32

  The Problem: I have 2 domains, 2 web servers, 1 WAN IP. This is on a home network, so I don't have any crazy router or anything with the right tools, at least I don't think I do. I have a Dlink DIR-655 router. I need to be able to forward the website to the right box. 1 server is hosting www.site1.com, and the other should be hosting, www.site2.com. I forwarded the domain, to a port that is forwarded to that box. wanip:1235, 1235 is then forwarded to the internal IP of site2's server. But when I go to www.site2.com I get the 404 page of www.site1.com. I need www.site2.com to go to the right server. Is this something I can do in the virtual hosts of www.site1.com or is it something else. Also, if this isn't entirely possible, or if its a big process, I can just move www.site1.com to the www.site2.com's server, and use virtual hosts, that is an option that I would be okay with.

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• other ways to change splash screen

  - by gcc

  I want change my splash screen .But when I download any splash screen packet in computer , I cannot install them .Every time ,computer gives me same warning "that packet is not a format wanted" -warning like this- I am asking "are there any other way to install splash screen?". note : I am also used 'Art manager' but it did not work properly.

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• How to downgrade a certain package (php) back to karmic

  - by Eugene

  Hi! I've updated from 9.10 to 10.04 but unfortunately the PHP provided with 10.04 is not yet supported by zend optimizer. As far as I understand I need to somehow replace the PHP 5.3 package provided under 10.04 with an older PHP 5.2 package provided under 9.10. However I am not sure whether this is the right way to downgrade PHP and if yes, I don't know how to replace the 10.04 package with 9.10 package. Could you please help me with that?

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• Time For Ubuntu to Fork Evolution

  <b>WMD Zone:</b> "Novell have previously tried to leverage that market but did it all wrong. They didn&#8217;t understand that there is just one killer feature ... that needs to be in there which is Exchange support."

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• Any dangers of sharing /home partition between two distros?

  - by Linux_iOS.rb.cpp.c.lisp.m.sh

  I have a laptop with a 250GB HDD. I have an existing installation of Kubuntu across three partitions (A 20GB one for /, 2GB for swap, and something like 97GB for /home). If I add another partition, use that as / for a Mint 13 install, and then use the existing /home partition as Linux Mint's home folder (different user names), are there any dangers (besides badly done partitioning, and other dumb things like that)?

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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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• Why am I missing the Ubuntu icon on the log-in screen?

  - by dtdlurch

  I am running Ubuntu 12.10. On the log-in screen, there is no Ubuntu icon for me to click on to change desktop environments. I know where it should be, but it is simply not there. Why is this? And how can I get it back??? I just installed Cinnamon and I would very much like to switch to this environment. I apologize if this is has been addressed elsewhere, but I honestly did try to research before asking. I found several similar questions, but nothing that has answers that helped my situation. And an hour of Googling did not produce anything helpful at all. Thank you for your help.

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• Hard drive partition size wrong. How do I resize without loss of data?

  - by BreezyChick89

  $ fsck fsck from util-linux 2.20.1 e2fsck 1.42 (29-Nov-2011) The filesystem size (according to the superblock) is 610471680 blocks The physical size of the device is 536870911 blocks Either the superblock or the partition table is likely to be corrupt! It should be 1 partition but it now shows 2.2tb partitioned and .3tb unpartitioned How do I make the first partition correctly be 2.5tb without destroying whatever is in either partition? I did not raid or anything. My devices have been getting repeatedly corrupt by thunderstorms. Looks like people recommend doing something like in other places. sudo resize2fs /dev/sdc1 610471680

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• How do I recover my accidentally lost Windows partitions after installing Ubuntu?

  - by Totally newbie

  I have a Toshiba satellite A-200 laptop with a Vista OS on it with 4 NTFS partitions (C:) Vista (D:) Entertainment (E:) Work (F:) Sources and I wanted to start using Ubuntu instead. So I tried it first from the live CD and everything was OK and all the partitions were shown and working and so I decided to install Ubuntu to replace Vista on the (C:) drive. After I did that I can no longer find my folders and files on the (D:), (E:), (F:) partitions and the only file system that is shown is one 198 GB although my HDD is 320 GB. I can't access the lost data on the remaining 120 GB which I hope is still there and not totally lost I am now working from the live CD but I am unable to install testdisk. Can I recover the Vista partitions by the product recovery CD to get my laptop back to the factory settings? Can I recover the NTFS partitions using a recovery program for Windows or will that make the problem worse? I need these data badly as I don't have a backup for them.

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• How do I (and do I even want to) delete outdated versions of the Linux kernel?

  - by NoCatharsis

  I notice that GRUB (or is it GRUB2?) asks which version of Linux I'd like to boot, and outdated versions of the kernel are listed. How do I remove these and their associated files to save disk space? Since I'm new to Linux, is there any reason why I shouldn't remove them?

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• Given a used laptop with Ubuntu installed, how do I get past the password demands?

  - by user287494

  Recently given a laptop with Ubuntu 12.1 installed alongside Windows 7. Can only access Ubuntu, which is fine for everyday use (LibreOffice, Firefox, etc.) but there's an authentication password required to install the 500+ updates, and when trying to run anything in terminal, it asks for "quiz's" password. It won't allow me to go into root mode to bypass the password (if that's even a real thing?). I'm completely new to Linux, but am fascinated at the capabilities and would like to mess around some more, but keep getting stopped by these passwords. What do I have to do? Uninstall and re-install? How does one do that if I don't even have access to the Windows 7 OS because it is password protected as well? Thanks in advance for any information and help.

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• Should I completely turn off swap for linux webserver?

  - by Poma

  Recently my friend told me that it is a good idea to turn off swap on linux webservers with enough memory. My server has 12 GB and currently uses 4GB (not counting cache and buffers) under peak load. His argument was that in a normal situation server will never use all of its RAM so the only way it can encounter OutOfMemory situation is due to some bug/ddos/etc. So in case swap is turned off system will run out of memory that will eventually crash the program hogging memory (most likely the web server process) and probably some other processes. In case swap is turned on it will eat both RAM and swap and eventually will result in the same crash, but before that it will offload crucial processes like sshd to swap and start to do a lot of swap operations resulting in major slowdown. This way when under ddos system may go into a completely unusable condition due to huge lags and I probably will not be unable to log in and kill webserver process or deny all incoming traffic (all but ssh). Is this right? Am I missing something (like the fact that swap partition is very useful in some way even if I have enough RAM)? Should I turn it off?

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• Host to set up postfix to use external smtp server

  - by Leo

  I have a web server and a mail server. Both have the same domain name except, one points to mywebsite.com and the other is mail.mywebsite.com. They have different IPs. I'm trying to set up postfix on my web server so it uses my mail server as the server that sends e-mails. I followed this guide: http://www.howtoforge.com/postfix_relaying_through_another_mailserver I am getting this error in my logs: Oct 28 02:56:45 mywebsite postfix/smtp[1660]: warning: host mail.mywebsite.com[xxx.xxx.xx.xx]:25 greeted me with my own hostname mywebsite.com Oct 28 02:56:46 mywebsite postfix/smtp[1660]: warning: host mail.mywebsite.com[xxx.xxx.xx.xx]:25 replied to HELO/EHLO with my own hostname mywebsite.com I've searched around and I read that you can't use the same hostname when relaying to a separate smtp server. Is there a work around for this? Do I need to set up my mail server with a separate domain name? Also I have my MX records set up for both mywebsite.com and mail.mywebsite.com. I'm not that experienced with this so if I need to give more info let me know. Thanks!

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