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• VirtualBox error with Ubuntu virtual machine

  - by user2985363

  I am trying to work on a coding project and cannot open my Ubuntu virtual machine with Oracle VM VirtualBox. I took a snapshot yesterday at about 11, and it was working fine. Several times I closed and reopened it. Today when I tried to open it, I kept getting the error below. Failed to open a session for the virtual machine Ubuntu 12.04 32-bit. VM cannot start because the saved state file 'C:\Users\Tyler\VirtualBox VMs\Ubuntu 12.04 32-bit\Snapshots\2014-01-30T19-59-05-976647800Z.sav' is invalid (VERR_FILE_NOT_FOUND). Deleted the saved state prior to starting the VM. I tried deleting the file as it said, but none of the snapshots would open still. The file is still in my recycling bin. What can I do? Also, I took the 1/31 snapshot today before I deleted the previous one.

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• Cannot login to fresh Kubuntu installation as admin, but only as guest

  - by Cedric Reichenbach

  I just installed a fresh Kubuntu 12.10 on a machine beside Windows 7. After successful installation, I rebooted and wanted to login. But when I type my password and hit Enter, some command line screen shows up for the split of a second and then it thows me back to the login screen without any error message. It's hard to spot what the command line text says, but I couldn't see any error or something like that. Anyway, when I log in as guest (without password), everything works finely. Also, when going to a system command line (using Ctrl+Alt+F1), I can login with my account without any problems. Does anyone have a clue what is going on and how to fix it?

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• Audio organizing via CLI

  - by Radek Šimko

  I'm looking for some software for my OpenSUSE, which with I would be able to organize my audio files. I've found one, which may be good, but it's unable to run without X server (in CLI). http://musicbrainz.org/doc/MusicBrainz_Picard I'm not looking for ID3 renamers. There're maybe hundreds of them... I'm looking for software, which has its own database, or is able to communicate with some database, like CDDB, Gracenote, last.fm etc.

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• some novice questions about VPS

  - by Camran

  I have ordered a VPS today, and I am still setting it up. I have some Q though: Also, I have just installed apache, php and mysql. 1- I don't understand which folder my website should be in. Is it the 'www' folder or the htdocs folder I should upload my site to? Because they are in entirely different directories. 2- How do I even upload files? FTP program? How do I install one, and which one? Thanks

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• Keep Uploaded Files in Sync Across Multiple Servers - LAMP

  - by Dfranc3373

  I have a website right now that is currently utilizing 2 servers, a application server and a database server, however the load on the application server is increasing so we are going to add a second application server. The problem I have is that the website has users upload files to the server. How do I get the uploaded files on both of the servers? I do not want to store images directly in a database as our application is database intensive already. Is there a way to sync the servers across each other or is there something else I can do? Any help would be appreciated. Thanks

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• Hardware needed for receiving and recording videocalls in Asterisk

  - by jneves

  I'm planning an Asterisk configuration that should record videocalls and then feed it to an application. From what I've researched, it seems like app_h234m is the way to go (http://www.voip-info.org/wiki/view/Asterisk+app_h324m+compatibility). But it's not clear to me what are the hardware requirements for this. Can someone enlighten me?

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• Compiz: Switching focus by application instead of by window

  - by Ivan Vucica

  I got used to OS X way of doing things (separate shortcuts for switching between applications and switching between current application's windows). Is there a way to get Compiz to have a shortcut (such as Super+Tab) to switch between applications ("window groups") instead of between windows? I already got the "Scale" plugin (an expose clone) to display only windows from current window group, proving there is a way to group by application, but I cannot find a way to get the "Application Switcher" to switch between these groups instead of between windows themselves.

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• Convert shell logs (incl. escape characters) to HTML?

  - by dehmann

  Is there tool or a regexp that can convert shell escape characters to HTML code? As an example, here is a logfile from GNU screen: ^MESC[K$ ^MESC[K$ exit Executing .bashrc ESC[00;31;31mserver.xyz.com: ESC[00;34;34m~ which I would like to convert to something like this: $ exit Executing .bashrc <font color=red>server.xyz.com</font>: <font color=blue>~</font> and send as HTML e-mail to an e-mail address, to archive my work. Here is a related question, which shows how to convert it to regular text, but it would be nice to convert to HTML and not just throw the escape characters away.

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• Do best-practices say to restrict the usage of /var to sudoers?

  - by NewAlexandria

  I wrote a package, and would like to use /var to persist some data. The data I'm storing would perhaps even be thought of as an addition for /var/db. The pattern I observe is that files in /var/db, and the surrounds, are owned by root. The primary (intended) use of the package filters cron jobs - meaning you would need permissions to edit the crontab. Should I presume a sudo install of the package? Should I have the package gracefully degrade to a /usr subdir, and if so then which one? If I 'opinionate' that any non-sudo install requires a configrc (with paths), where should the package look (presuming a shared-host environment) for that config file? Incidentally, this package is a ruby gem, and you can find it here.

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• what to do when ctrl-c can't kill a process?

  - by Dustin Boswell

  Ctrl-c doesn't always work to kill the current process (for instance, if that process is busy in certain network operations). In that case, you just see "^C" by your cursor, and can't do much else. What's the easiest way to force that process to die now without losing my terminal? Summary of answers below: Usually, you can Ctrl-z to put the process to sleep, and then do "kill -9 process-pid", where you find the process's pid with 'ps' and other tools. On Bash (and possibly other shells) you can do "kill -9 %1" (or '%N' in general) which is easier. If Ctrl-z doesn't work, you'll have to open another terminal and kill from there.

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• CoovaAP router does not get DHCP settings from modem

  - by Dan Sosedoff

  Im having some serious trouble making CoovaAP-powered router get network settings from modem. Wireless router works in captive portal mode (so it handles user login on the same device). But DNS settings and connection ip (for router) are not set as they supposed to via DHCP on modem. It makes installation in other location really complicated, because you have to go and set everything manually. For now i use google`s dns servers. What`s the way to make router self-configurable via modem's dhcp ?

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• How to set ext3 partition hidden flag?

  - by MA1

  I have a created an ext3 partition and when i tried to set is hidden flag, there seems no effect. So, how to set the hidden flag of an ext3 partition?

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• VMware - Broadcom 1000Gbps NIC does not link at 100Mbps to a Cisco switch port

  - by Spirit

  Today we've stumbled on a very awkward situation with our VMWare Server. The server is with ESX 3.5 that has a 1Gbps NIC. We bought a brand new managed Cisco Linksys switch with 10/100Mbps interface ports but when we plugged the cable in one of the ports the link simply does not wanted to activate :S... Does anyone with more VMware experience have ever had similar problem? From what I know is that 1Gbps NICs are backwards compatible with 100Mbps switches. This is what we've tryed so far but with no success: Tryed: http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1004089 Tryed to modify the /etc/modules.conf folowing the guide from this article http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=813 After the changes I have restarted the networking services using # service network restart, # service mgmt-vmware restart and # service vmware-vpxa restart It seems that no matter how many times, or whatever approach/method (GUI or Shell) we try to change the speed and duplex of the network adapter and to force it to 100mbps it only accepts 1Gbps .. I am starting to go nuts :@

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• Is there a way to rsync in batches?

  - by Chris

  I have a huge chunk of data (11G) in a subversion repository that I'm using rsync to migrate to Alfresco, which lucene indexes new files as they hit the file system. I'm using a dav mount as a proxy to allow me to rsync. The issue I'm having is the indexing post-rsync is quite an expensive operation for such a huge chunk of data, so I was wondering whether there's a way I could logically separate the rsync into identically-sized batches (say 500MB each) so I could schedule them in cron. At the moment, I'm traversing the top level folders and taking the smallest ones across first, but once I'm done with those, the much larger sub-directories are going to be quite troublesome. Please let me know if you need any further info. Thanks in advance.

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• Creating rescue / install USB flash disk for CentOS

  - by wwwpanda

  For CentOS installation CDs, you can install OS, as well as booting into "rescue" mode so that you can do a chroot mount on the system partition for problem solving, even the system is installed in hardware RAID drives. How can we create a similar thing but on usb flash drive? I tried to do it with unetbootin, but when booting into the USB, eventually the CentOS setup still requires presence of CDs. Ultimately, I want to use this usb flash drive for remote disaster recovery through say HP iLo remote console / Dell iDrac etc.

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• Ubuntu hardware compatability

  - by CT

  I have only previously played with ubuntu using virtual machines with VMware Fusion. So everything just sort of worked. I've never had to install any drivers. I'm considering putting it on some real hardware and using it as a media center. What should I be looking for as far as checking hardware compatibility? How does installing drivers work? Any quick and easy recommendations / guides?

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• Nginx Server Block Not Working? - Already running other vhosts just this one not working

  - by daveaspinall

  Im running a Debian 6 LEMP server with multiple virtual hosts and everything has been fine for 5 or so sites. But I've just tried adding another but for some reason it's just not working. By not working I mean in Chrome I get the "Oops! Google Chrome could not connect to subdomain.domain.net" error. I've changed the domain for security to subdomain.example.com and the IP is masked. Hosts file (I have multiple sub domains): xxx.xxx.xx.xxx *.example.com *.example Server Block: server { listen 80; server_name subdomain.example.com; access_log /srv/www/subdomain.example.com/logs/access.log; error_log /srv/www/subdomain.example.com/logs/error.log; root /srv/www/subdomain.example.com/public_html; location / { index index.html index.htm index.php; } location ~ \.php$ { include fastcgi_params; fastcgi_pass 127.0.0.1:9000; fastcgi_index index.php; fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; } } I've created the system link to the file in the /etc/nginx/sites-enabled/ directory and restarted/reloaded nginx. DNS seems fine: # ping -c 2 subdomain PING subdomain.example.com (xxx.xxx.xx.xxx) 56(84) bytes of data. 64 bytes from www.example.com (xxx.xxx.xx.xxx): icmp_req=1 ttl=64 time=0.035 ms 64 bytes from www.example.com (xxx.xxx.xx.xxx): icmp_req=2 ttl=64 time=0.048 ms Checking the file with cURL works: # curl http://subdomain.example.com HTML - OK Emptied browser cache but still no dice. Anything I'm missing? Like I mentioned, I have a few sites running fine on the server currently so php-fpm etc etc are working. Any help would be much appreciated! Cheers, Dave

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• Migrating users and mailboxes from postfix / Maildir to Postfix with Mysql backend [closed]

  - by Chrispy

  Possible Duplicate: Migrating users and mailboxes from postfix / Maildir to Postfix with Mysql backend So I've got 60 or so users on a hand rolled postfix installation on openbsd and I'd like to move their mailboxes to our new mail server running iRedMail (postfix, vmail/mysql back end) Does anyone know of a good way to do this? Preferably a script I can run to keep syncing the users mailboxes as MX records get updated? I presume one way (though I don't have all their passwords!) would be to have a command line imap client that simulated the users copying their mail themselves but I'm sure there must be a shell / php script to migrate users? Anyone got any bright ideas? Chris.

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• How to mount LUKS partition securely on server

  - by Ency

  I'm curious if it is possible to mount a partition encrypted by cryptsetup with LUKS securely and automatically on Ubuntu 10.0.4 LTS. For example, if I use the key for the encrypted partition, than that key has to be presented on a device that is not encrypted and if someone steals my disk they'll be able to find the key and decrypt the partition. Is there any safe way to mount an encrypted partition? If not, does anything exist to do what I want?

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• Root SSH/SFTP Always 777

  - by Fluidbyte

  I have an Ubuntu serve that I'm connecting to via SFTP (and also an SSHFS mount locally). When I move a file to the server via the mount I need it to have permissions set to 777. I've added umask 000 to the .bashrc file at the advice of a friend and it doesn't appear to be working. Basically I'm working completely in a restricted folder and need the root to always leave the permissions open - wether I'm SSH'ed in or moving files to the server.

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• PhpMyAdmin Hangs On MySQL Error

  - by user75228

  I'm currently running PhpMyAdmin 4.0.10 (the latest version supporting PHP 4.2.X) on my Amazon EC2 connecting to a MySQL database on RDS. Everything works perfectly fine except actions that return a mysql error message. Whether I perform "any" kind of action that will return a mysql error, Phpmyadmin will hang with the yellow "Loading" box forever without displaying anything. For example, if I perform the following command in MySQL CLI : select * from 123; It instantly returns the following error : ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '123' at line 1 which is completely normal because table 123 doesn't exist. However, if I execute the exact same command in the "SQL" box in Phpmyadmin, after I click "Go" it'll display "Loading" and stops there forever. Has anyone ever encountered this kind of issue with Phpmyadmin? Is this a bug or I have something wrong with my config.inc.php? Any help would be much appreciated. I also noticed these error messages in my apache error logs : /opt/apache/bin/httpd: symbol lookup error: /opt/php/lib/php/extensions/no-debug-non-zts-20060613/iconv.so: undefined symbol: libiconv_open /opt/apache/bin/httpd: symbol lookup error: /opt/php/lib/php/extensions/no-debug-non-zts-20060613/iconv.so: undefined symbol: libiconv_open /opt/apache/bin/httpd: symbol lookup error: /opt/php/lib/php/extensions/no-debug-non-zts-20060613/iconv.so: undefined symbol: libiconv_open Below are my config.inc.php settings : <?php /* vim: set expandtab sw=4 ts=4 sts=4: */ /** * phpMyAdmin sample configuration, you can use it as base for * manual configuration. For easier setup you can use setup/ * * All directives are explained in documentation in the doc/ folder * or at <http://docs.phpmyadmin.net/>. * * @package PhpMyAdmin */ /* * This is needed for cookie based authentication to encrypt password in * cookie */ $cfg['blowfish_secret'] = 'something_random'; /* YOU MUST FILL IN THIS FOR COOKIE AUTH! */ /* * Servers configuration */ $i = 0; /* * First server */ $i++; /* Authentication type */ $cfg['Servers'][$i]['auth_type'] = 'cookie'; /* Server parameters */ $cfg['Servers'][$i]['host'] = '*.rds.amazonaws.com'; $cfg['Servers'][$i]['connect_type'] = 'tcp'; $cfg['Servers'][$i]['compress'] = true; /* Select mysql if your server does not have mysqli */ $cfg['Servers'][$i]['extension'] = 'mysqli'; $cfg['Servers'][$i]['AllowNoPassword'] = false; $cfg['LoginCookieValidity'] = '3600'; /* * phpMyAdmin configuration storage settings. */ /* User used to manipulate with storage */ $cfg['Servers'][$i]['controlhost'] = '*.rds.amazonaws.com'; $cfg['Servers'][$i]['controluser'] = 'pma'; $cfg['Servers'][$i]['controlpass'] = 'password'; /* Storage database and tables */ $cfg['Servers'][$i]['pmadb'] = 'phpmyadmin'; $cfg['Servers'][$i]['bookmarktable'] = 'pma__bookmark'; $cfg['Servers'][$i]['relation'] = 'pma__relation'; $cfg['Servers'][$i]['table_info'] = 'pma__table_info'; $cfg['Servers'][$i]['table_coords'] = 'pma__table_coords'; $cfg['Servers'][$i]['pdf_pages'] = 'pma__pdf_pages'; $cfg['Servers'][$i]['column_info'] = 'pma__column_info'; $cfg['Servers'][$i]['history'] = 'pma__history'; $cfg['Servers'][$i]['table_uiprefs'] = 'pma__table_uiprefs'; $cfg['Servers'][$i]['tracking'] = 'pma__tracking'; $cfg['Servers'][$i]['designer_coords'] = 'pma__designer_coords'; $cfg['Servers'][$i]['userconfig'] = 'pma__userconfig'; $cfg['Servers'][$i]['recent'] = 'pma__recent'; /* Contrib / Swekey authentication */ // $cfg['Servers'][$i]['auth_swekey_config'] = '/etc/swekey-pma.conf'; /* * End of servers configuration */ /* * Directories for saving/loading files from server */ $cfg['UploadDir'] = ''; $cfg['SaveDir'] = ''; /** * Defines whether a user should be displayed a "show all (records)" * button in browse mode or not. * default = false */ //$cfg['ShowAll'] = true; /** * Number of rows displayed when browsing a result set. If the result * set contains more rows, "Previous" and "Next". * default = 30 */ $cfg['MaxRows'] = 50; /** * disallow editing of binary fields * valid values are: * false allow editing * 'blob' allow editing except for BLOB fields * 'noblob' disallow editing except for BLOB fields * 'all' disallow editing * default = blob */ //$cfg['ProtectBinary'] = 'false'; /** * Default language to use, if not browser-defined or user-defined * (you find all languages in the locale folder) * uncomment the desired line: * default = 'en' */ //$cfg['DefaultLang'] = 'en'; //$cfg['DefaultLang'] = 'de'; /** * default display direction (horizontal|vertical|horizontalflipped) */ //$cfg['DefaultDisplay'] = 'vertical'; /** * How many columns should be used for table display of a database? * (a value larger than 1 results in some information being hidden) * default = 1 */ //$cfg['PropertiesNumColumns'] = 2; /** * Set to true if you want DB-based query history.If false, this utilizes * JS-routines to display query history (lost by window close) * * This requires configuration storage enabled, see above. * default = false */ //$cfg['QueryHistoryDB'] = true; /** * When using DB-based query history, how many entries should be kept? * * default = 25 */ //$cfg['QueryHistoryMax'] = 100; /* * You can find more configuration options in the documentation * in the doc/ folder or at <http://docs.phpmyadmin.net/>. */ ?>

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• Monitor status while using VNC

  - by kumar

  So after connecting to a vnc server via vnc viewer to my desktop (remotely), Is it possible to know whether the monitor connected to the CPU is switched ON or not. Simply put, from command prompt how do you know whether monitor is ON/OFF from command line. Here, Basically I am bit worried about privacy as my monitor can be viewed by anyone while accessed remotely. Any solution? Obviously there is a option to switch off the monitor while starting the vnc server at remote side but I am looking for a better solution to control monitor(possible??) remotely. Thanks!

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• Finding the current user authenticated by basic auth (Apache)

  - by jtd

  When you log in through a basic auth page, is the username you authenticated as stored anywhere (on the server or client machine), maybe in an environment variable? Background: I have a common web administration page for an e-mail server and I'd like to know who is doing what. When a user successfully logs in via basic auth, I somehow want to be able to identify them and log their actions. So each time a request is submitted, I can write to a log file. The basic format would be: $username ran a $function against $useraccount so if a user changed someone's permissions, eg: Admin-Bob ran a permission change against User-Scott So if errors occur, I can easily trace back in the log file what actions lead to the cause. I tried checking the %ENV hash to no avail, any Ideas? I don't really want to get into PHP-like sessions, because that would mean scrapping my basic auth, which gives me a fine degree of control already. If I have to code something with sessions, I'd need to implement a system to block users after maximum tries and so on, which I don't really want to code. I think this is better geared towards serverfault because it pertains to Apache moreso than the programming language. Sessions can be done in a myriad of languages.

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• Xen virtual host can reach some sites but not others

  - by Tun H S Lee

  Okay, this is killing me. Debian Squeeze, Xen 4.0, brand new install. No iptables rules whatsoever except for the ones added by the default xen bridge script. Dom0 can reach the entire world, no problems. DomU can receive packets from some hosts, but not from others. For instance, if I ping Host A, it works fine. If I ping Host B, the DomU reports 100% packet loss. The hosts are random, but consistent (even after reboots). I can see no pattern to why some work and others don't. In fact, in some cases, different virtual hosts on the same server (an other server at a different data center) are divided; some work and others do not. I can reboot (DomU or Dom0 too) and the same hosts will work or fail as before. If I tcpdump on the Host B while pinging from the DomU, everything looks fine. It sees the echo request coming in and says it's sending one back. However, if I tcpdump peth0 on the Dom0, it never sees the echo reply. Any ideas what could be happening? I'm tearing my hair out here.

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• Do you know a script for email round trip monitoring?

  - by crazyfr

  Do you know a simple script that can do email round trip monitoring ? I want to monitor email service on A. I install the script on B. B sends an email to A A sends an auto-reply to B B knows that email service is working well. B restarts this test every 30min. If B didn't received replies, it sends an alert message. B could also monitor round-trip delay of emails. I have not access to the email service, I can only ask new end user email and configure auto-reply. B is an Ubuntu. Thanks!

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