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• Why is a ZFS pool not persisting over server restart?

  - by Chance

  I have a ZFS pool with 4 drives. It also has a 3gb ZIL and a 20GB L2ARC that are each partitions on an SDD that doubles as my Linux Mint (ver. 13) boot drive. The pool is mounted to /data. The problem I am running into is that when I restart the server the pool/directory is completely wiped despite having data in it prior. I'm afraid I'm doing something wrong in the setup, which leads me to the following questions: What would cause this? Is there anyway to get the data back? How do I stop it from happening in the future? Thank you in advance! pool: data state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM data ONLINE 0 0 0 raidz2-0 ONLINE 0 0 0 sda1 ONLINE 0 0 0 sdb1 ONLINE 0 0 0 sdc1 ONLINE 0 0 0 sdd1 ONLINE 0 0 0 logs sde4 ONLINE 0 0 0 cache sde3 ONLINE 0 0 0 errors: No known data errors

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• Cannot connect on TFS 2012 server through SSL with invalid certificate

  - by DaveWut

  I saw the problem on some forums and even here, but not as specific as mine. So here's the thing, So I've configured a TFS 2012 server, on one of my personnel server at home, and now, I'm trying to make it available through the internet, with the help of apache2 on a different UNIX based, physical server. The thing is working perfectly, I don't have any problem accessing the address https://tfs.something.com/tfs through my browser. The address can be pinged and I do have access to the TFS control panel through it. How does it work? Well, with apache2 you can set a virtual host and set up the ProxyPass and ProxyPassReserver setting, so the traffic can externally comes from a secure SSL connection, through a specified domain or sub-domain, but it can be locally redirect on a clear http session on a different port. This is my current setup. As I already said, I can access the web interface, but when I'm trying to connect with Visual Studio 2012, it can't be done. Here's the error I receive: http://i.imgur.com/TLQIn.png The technical information tells me: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. My SSL certificate is invalid and was automatically generated on my UNIX server. Even if I try to add it in the Trusted Root Certification Authorities either on my TFS server or on my local workstation, it doesn't work. I still receive the same error. Is there's a way to completely ignore certificate validation? If not, what's have I done? I mean, I've added the certificate in the trusted root certificates, it should works as mentioned on some forums... If you need more information, please ask me, I'll be pleased to provide you more. Dave

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• configure squid3 to set up a web proxy in ubuntu12.04

  - by Gnijuohz

  I am in a LAN and have to use a proxy given to access the web in a very limited way. I can't even use google, github.com or SE sites. However I can use ssh to log into a server, which I have root access so basically I can do anything I want with it. So I was thinking that maybe I could use that server as a proxy so I can visit sites through it. I tested it using ssh -vT [email protected] which gave a proper response. And In my computer I can't do this. Also I tried downloading something from the gun.org using wget, which can't be done in my computer too. And it succeeded on that server. I don't know if that's enough to say that this server have full access to the Internet. But I assumed so and I installed squid3 on it. After trying some while, I failed to get it working. I got this after I run squid3 -k parse 2012/07/06 21:45:18| Processing Configuration File: /etc/squid3/squid.conf (depth 0) 2012/07/06 21:45:18| Processing: acl manager proto cache_object 2012/07/06 21:45:18| Processing: acl localhost src 127.0.0.1/32 ::1 2012/07/06 21:45:18| Processing: acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 ::1 2012/07/06 21:45:18| Processing: acl localnet src 10.1.0.0/16 # RFC1918 possible internal network 2012/07/06 21:45:18| Processing: acl SSL_ports port 443 2012/07/06 21:45:18| Processing: acl Safe_ports port 80 # http 2012/07/06 21:45:18| Processing: acl Safe_ports port 21 # ftp 2012/07/06 21:45:18| Processing: acl Safe_ports port 443 # https 2012/07/06 21:45:18| Processing: acl Safe_ports port 70 # gopher 2012/07/06 21:45:18| Processing: acl Safe_ports port 210 # wais 2012/07/06 21:45:18| Processing: acl Safe_ports port 1025-65535 # unregistered ports 2012/07/06 21:45:18| Processing: acl Safe_ports port 280 # http-mgmt 2012/07/06 21:45:18| Processing: acl Safe_ports port 488 # gss-http 2012/07/06 21:45:18| Processing: acl Safe_ports port 591 # filemaker 2012/07/06 21:45:18| Processing: acl Safe_ports port 777 # multiling http 2012/07/06 21:45:18| Processing: acl CONNECT method CONNECT 2012/07/06 21:45:18| Processing: http_port 3128 transparent vhost vport 2012/07/06 21:45:18| Starting Authentication on port [::]:3128 2012/07/06 21:45:18| Disabling Authentication on port [::]:3128 (interception enabled) 2012/07/06 21:45:18| Disabling IPv6 on port [::]:3128 (interception enabled) 2012/07/06 21:45:18| Processing: cache_mem 1000 MB 2012/07/06 21:45:18| Processing: cache_swap_low 90 2012/07/06 21:45:18| Processing: coredump_dir /var/spool/squid3 2012/07/06 21:45:18| Processing: refresh_pattern ^ftp: 1440 20% 10080 2012/07/06 21:45:18| Processing: refresh_pattern ^gopher: 1440 0% 1440 2012/07/06 21:45:18| Processing: refresh_pattern -i (/cgi-bin/|?) 0 0% 0 2012/07/06 21:45:18| Processing: refresh_pattern (Release|Packages(.gz)*)$ 0 20% 2880 2012/07/06 21:45:18| Processing: refresh_pattern . 0 20% 4320 2012/07/06 21:45:18| Processing: ipcache_high 95 2012/07/06 21:45:18| Processing: http_access allow all I deleted some allow and deny rules and added http_access allow all so that all the request would be allowed. After configuring my computer, I got this error: Access control configuration prevents your request from being allowed at this time. Please contact your service provider if you feel this is incorrect. And the log in the server showed that my TCP requests had all been denied. So, first of all, is what I am trying to do achievable? If so, how to configure the squid in the server so that I use it as a proxy to surf the Internet? My computer and the server both run Ubuntu11.04. Thanks for any help~

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• Is there any way to detect when nginx has completed a graceful shutdown?

  - by Daniel Vandersluis

  I have a ruby on rails application which is running on passenger and nginx, with one main webserver and multiple application servers. I am trying to update my deployment process in order to minimize (or ideally, remove) any downtime caused by the deployment. The main roadblock right now is that passenger takes some time to restart (ie. reload the application), so in order to get around this, I want to stagger my restarts so that only one app server gets restart at a time. In order to do this without losing any long running passenger processes, I am thinking I need to gracefully shutdown the app server's nginx instance, which will cause it to no longer accept new connections but continue to process the existing ones; as well, HAProxy will detect that the app server is down and route new requests to the other server. However, assuming that there is a long-running process, I am not sure how to detect when the graceful shutdown has completed so that I can start it back up. Since the shutdown is caused by sending a signal (ie. kill -QUIT $( cat /var/run/nginx.pid )), and the kill command will return immediately, I cannot combine commands (ie. kill ... && touch restarted), as the touch command will execute immediately, even if nginx hasn't completed its shutdown. Is there any good way to do this?

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• Regarding Reinstalling PostgreSQL

  - by Vivalavista

  I was using PostgreSQL 8.4. I tried removing it through Synaptic Manager and then I tried to install 9.1, but I still version 8.4. I deleted all the files associated with postgresql. Now I am unable to install any version of PostgreSQL. When I try I get this error: Setting up postgresql-9.1 (9.1.3-1~lucid) ... .: 12: Can't open /usr/share/postgresql-common/maintscripts-functions dpkg: error processing postgresql-9.1 (--configure): subprocess installed post-installation script returned error exit status 2 dpkg: dependency problems prevent configuration of postgresql: postgresql depends on postgresql-9.1; however: Package postgresql-9.1 is not configured yet. dpkg: error processing postgresql (--configure): dependency problems - leaving unconfigured No apport report written because the error message indicates its a followup error from a previous failure. Errors were encountered while processing: postgresql-9.1 postgresql E: Sub-process /usr/bin/dpkg returned an error code (1) Please tell me the way to remove postgres completely so I can install a fresh version.

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• Pysdm has disabled my ability to write to my storage partition

  - by Atlas

  I have a dual boot setup with Windows 7 and Mint 13 Cinnamon. As well as their respective partitions I also have a large one (NTFS) for storing all my music, videos, documents etc. I downloaded pysdm as I was told it would enable me to configure Linux to auto-mount my storage partition. It has indeed been helpful in auto-mounting my storage. However, since installing it I can no longer write to the partition which makes 500GB of my hard drive utterly useless! I've tried to unselect the "Mount file system in read only mode" option, but the program keeps re-checking it after I close that window (and even when I click apply). Why is it doing this and how can I get it to recognise that I need to read AND write on that partition?

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• How to chmod in Nautilus via keyboard?

  - by Joe Casadonte

  I like to use the mouse as little as possible, but I find Nautilus useful enough to use it when browsing for files. If I want to rename a file while in Nautilus I can hit the F2 key; is there a way I can chmod, too? I really hate going to properties and then permissions and then hitting the combo boxes one by one.... Thanks!

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• Bash: Read lines in a file scenario with sed or awk

  - by user105566

  I have this scenarios: File Content: 10.1.1.1 10.1.1.2 10.1.1.3 10.1.1.4 I want sed or awk so that when i cat the file every time new line is returned. like First iteration: cat ip | some magic 10.1.1.1 Second iteration returns 10.1.1.2 Third iteration returns 10.1.1.3 Fourth iteration returns 10.1.1.4 and after n number of iterations, it returns to line 1 Fifth iteration returns: 10.1.1.1 Can we do it using sed or awk.

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• Can Ubuntu create a semi-transparent subtitle player for accessibility?

  - by Tyler

  I've asked this in Reddit.com/r/Ubuntu in here. I've tried to get the Subtitle Player linked here to work and it have failed on Wine. So I'm curious if Ubuntu community would be willing to try and build a simple transparent subtitle player for better accessibility on Flash Player, Netflix, or even in movie theaters? Currently, I'm watching movies/videos with an Android Tablet that runs on a blank black video for 3 hours with a subtitle overlay on it so I can enjoy movie and so forth, but it requires a bit of effort and it definitely isn't for everyone. (People will have to look at the subtitle playing tablet and the movie back and forth at 60 degrees angle, while a transparent subtitle player would reduce it to 5 degrees angle to watch the movie.) Please and thank you.

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• Finding the A Record for a Home Server [closed]

  - by Ryan Allred

  I have a hosted website that allows me to add subdomains and point them to different locations on the server. I also know that I can change the 'A Record' to point it to a different IP address. Now, here's the question, I have a home server that I need to access though this hosted website's domain name. How would I go about setting up the 'A Record' on the server to point to my home server. I'm usually pretty good about keyword searches but on this one, I'm pretty lost as to what to search for.

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• redirect to 404 wildcard subdomain

  - by Leandro Garcia

  I setup a wildcard A record on my domain registrar. Now if a user access a missing subdomain on my domain, they will be redirected to the homepage. Currently my initial setup was this: <VirtualHost *:80> ServerAdmin webmaster@localhost RewriteEngine On RewriteRule ^(.*)$ http://domain.com$1 [R] DocumentRoot /var/www <Directory /> Options FollowSymLinks AllowOverride None </Directory> # more below... </VirtualHost> Any wildcard subdomain or if my IP is entered via URL will redirect to the homepage. Can I do something about this that will redirect (HTTP redirect perhaps) the wildcard subdomains to 404 page instead of to homepage?

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• Quick, Linux-compatible unit-aware calculator

  - by endolith

  I want to be able to press a keyboard combination, start typing a mathematical expression that includes units and slightly advanced math (not just a four-function calculator), and get a result immediately, in units that I specify, that I can copy and paste. Currently I open Firefox and press Ctrl+K, type in the search box, and it usually gives me a result in the drop-down from Google Calculator. It doesn't always, though, so I press "=" at the end, wait for a result, remove the equals, wait for a result, realize it doesn't understand the way I typed a unit, open the result in a new tab, etc. it sucks. Wolfram Alpha is smarter, but very much slower, and the output is all images, not text, and I don't have a quick widget for it, if such a thing could even exist. GNU units has a ton of units, which is great, and I can define my own units, which is great, but they have to be written in specific, unintuitive ways, it doesn't handle much advanced math, and I'd need to open a terminal, start units, etc. I hate the command line. I wasted a lot of time trying to make front-ends for units in Deskbar and Launchy, but I'm not a real coder and I don't use either of those anymore. Any other solutions or enhancements of these?

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• How do I go back to the initial desktop I got when I first installed the latest Ubuntu?

  - by RichardB

  I researched all the other questions and can't find specifically what I'm asking. I did a new install of Ubuntu 14.04.1 and started adding tweaks. I saw the Cinnamon desktop and it looked cool, but after I installed it (with Gnome), I decided I wanted to have the native Ubuntu 14.04.1 experience. I've got Unity to show up, but the top banner is still different and I want it just like it was in the initial install. I've added about 20 updates and upgrades and really don't want to go through all that again. I appreciate your response.

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• multiple ip for a server not reachable

  - by andrewk

  FYI: I've read everything on Serverfault related to this question and have faced a different issue. Simply put, I've got one server (apache2) with couple of sites on it. It currently has 1 ip. I'm trying to assign/add another ip to that server, so I can give each site a different ip for ssl purposes. I am not lucking out. The new ip simply is unreachable, I've pinged it. This is what I've got below, what am I doing wrong. auto lo iface lo inet loopback auto eth0 eth0:0 eth0:1 iface eth0 inet static address 70.116.5.244 netmask 255.255.255.0 gateway 70.116.5.1 #THE NEW IP iface eth0:0 inet static address 26.175.217.102 netmask 255.255.255.0 #PRIVATE IP iface eth0:1 inet static address 192.168.158.88 netmask 255.255.128.0 NOTE: THESE IP'S ARE TWEAKED BUT RELATIVE I've read many questions here 90% similar to this but most actually have the IP respond, not this case. Thanks netstar -r output Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface default gw-u6.linode.co 0.0.0.0 UG 0 0 0 eth0 70.116.5.0 * 255.255.255.0 U 0 0 0 eth0 26.175.217.0 * 255.255.255.0 U 0 0 0 eth0 192.168.128.0 * 255.255.128.0 U 0 0 0 eth0

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• regular user to admin group?

  - by ajsie

  i've got a regular user i want to turn into admin group so he can have same privileges as a root. how do i do that?

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• How to install wget on this?

  - by Winluser

  I did download RubyStack 2.0.3 for VMWare from http://bitnami.org/files/stacks/rubystack/2.0-3… but I cannot download anything on it! It appears that all basic utilities are missing/screwed: bitnami@linux:/var/tmp$ wget -bash: wget: command not found bitnami@linux:/var/tmp$ curl curl: error while loading shared libraries: libcurl.so.4: cannot open shared obj ect file: No such file or directory bitnami@linux:/var/tmp$ man wget -bash: man: command not found bitnami@linux:/var/tmp$ sudo apt-get install wget [sudo] password for bitnami: Reading package lists… Done Building dependency tree Reading state information… Done E: Couldn’t find package wget Any ideas how can I download anything on this machine? (I don't have physical access to it)

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• After installing Meld on 32-bit Karmic on 64-bit machine: "Meld requires pygtk 2.8.0 or higher."

  - by Lynx

  I got this error after installing Meld on a new Karmic installation: ~$ meld No module named pygtk Meld requires pygtk 2.8.0 or higher. I installed the latest version of python-gtk with aptitude but I'm not sure what version is actually installed. My python version is 2.6. This is weird because I have another machine that runs Karmic and Meld without a problem. The only difference between the two machines is the one with the error is a 64-bit machine running a 32-bit installation of Karmic. Could that be the problem?

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• Chrome shows "The site's security certificate is not trusted" error

  - by Emerald214

  From this morning I get this error whenever I access Google Docs and some websites. My system datetime is correct and I checked "Automatically from the Internet". My BIOS is OK. I cleared everything (cache, cookie, private data) in Chrome and restarted OS but nothing changes. How to fix it? Firefox works but Chrome has that problem. The site's security certificate is not trusted! You attempted to reach docs.google.com, but the server presented a certificate issued by an entity that is not trusted by your computer's operating system. This may mean that the server has generated its own security credentials, which Google Chrome cannot rely on for identity information, or an attacker may be trying to intercept your communications. You cannot proceed because the website operator has requested heightened security for this domain.

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• How Do I Know the Memory Used by Apps

  - by user176890

  Is it possible to know the memory used by any apps running on my linux server? I'm using the following command to know how much memory used by php-fpm. ps -ylC php5-fpm --sort:rss | awk '!/RSS/ { s+=$8 } END { printf "%s\n", "Total memory used by PHP-FPM child processes: "; printf "%dM\n", s/1024 }' Given the command above, I want to know the memory used by all apps with an example output below: PHP-FPM: 2.3gb MySQL: 5gb nginx: 200mb dovecot: 100mb memcached: 573mb

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• port to subdomain

  - by takeshin

  I have installed Hudson using apt-get, and the Hudson server is available on example.com:8080. For example.com I use standard port *:80 and some virtual hosts set up this way: # /etc/apache2/sites-enabled/subdomain.example.com <Virtualhost *:80> ServerName subdomain.example.com ... </Virtualhost> Here is info about Hudson process: /usr/bin/daemon --name=hudson --inherit --env=HUDSON_HOME=/var/lib/hudson --output=/var/log/hudson/hudson.log --pidfile=/var/run/hudson/hudson.pid -- /usr/bin/java -jar /usr/share/hudson/hudson.war --webroot=/var/run/hudson/war 987 ? Sl 1:08 /usr/bin/java -jar /usr/share/hudson/hudson.war --webroot=/var/run/hudson/war How should I forward: http:// example.com:8080 to: http:// hudson.example.com

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• Xforwarding doesn't allow for switching users

  - by Dan

  I'm ssh'd into a remote computer and xforwarding is working fine... but as soon as I "sudo su -" or "sudo su user2" it no longer Xforwards anything giving me the error: X11 connection rejected because of wrong authentication. xterm Xt error: Can't open display: localhost:10.0 Any Ideas? Thanks

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• Fried graphics card, how to proceed ?

  - by user19496

  Motherboard: Biostar TPower I45 I fried my graphics card (white smoke), by removing the cable marked PCI-E from the card, and then booting. Removed the graphics card, and now the machine is booting, and I can ping it. However I have no possibility to see what is actually happening, because I can't attach a monitor. Can I workaround the lack of monitor in some way, just to see if the motherboard is fine, attach a cable and telnet in or any other way ? Or, do I have to buy and install a new graphics card to be sure ?

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• Munin Aggregated Graphs Configuration Error

  - by Sparsh Gupta

  I tried making some Munin Aggregated graphs but somehow I am unable to make the configuration work. I think I have followed the instructions but since its not working, I would love some assistance or guidance as to what I am doing wrong. I want to Aggregate (sum) the total number of requests / second all my nginx servers are doing combined together. The configuration looks like [TRAFFIC.AGGREGATED] update no requests.graph_title nGinx requests requests.graph_vlabel nGinx requests per second requests.draw LINE2 requests.graph_args --base 1000 requests.graph_category nginx requests.label req/sec requests.type DERIVE requests.min 0 requests.graph_order output requests.output.sum \ lb1.visualwebsiteoptimizer.com:nginx_request_lb1.visualwebsiteoptimizer.com_request.request \ lb3.visualwebsiteoptimizer.com:nginx_request_lb2.visualwebsiteoptimizer.com_request.request \ lb3.visualwebsiteoptimizer.com:nginx_request_lb3.visualwebsiteoptimizer.com_request.request The munin graph I want to aggregate is http://exchange.munin-monitoring.org/plugins/nginx_request/details Thanks Sparsh Gupta

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• Network devices disabled

  - by Tao

  I've been running the Lucid Lynx alpha since first release and only now, after recently putting my computer into suspend then restarting, has the networking failed completely. Both wireless and ethernet list as disabled with sudo lshw -C network. The wireless adapter is an Atheros AR928X. The ethernet is a Realtek RTL8111/8168B. Any suggestions as to how I might go about fixing this?

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• I can't externally access my home server's wordpress website

  - by piratepartypumpkin

  Basically, I can access everything just fine using 127.0.0.1, but if I use my external IP (123.123.123.123), I get page not found. My router is port forwarding HTTP port 80 to port 8080 on my servers internal IP address. In other words: (Application: HTTP | Start: 80 | End: 8080 | Protocol: Both | IP Address 192.168.0.101 | Enable [YES]) I know it's forwarding properly, because when I stop port forwarding, I can access my router page by using my external IP. My virtual hosts file is: NameVirtualHost *:80 <VirtualHost *:80> DocumentRoot /opt/lampstack-5.3.16-0/apps/wordpress ServerName example.com ServerAlias www.example.com </VirtualHost> and my httpd.conf file is: Listen 80 Servername localhost:80 DocumentRoot "/opt/lampstack-5.3.16-0/apache2/htdocs <Directory /> Options FollowSymLinks AllowOverride None Order deny, allow deny from all </Directory> <Directory "/opt/lampstack-5.3.16-0/apache2/htdocs"> Options FollowSymLinks AllowOverride None Order allow, deny allow from all </Directory>

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