Ubuntu Servers :: Can't SSH Into UEC VM Instance
Feb 10, 2010
I am running Ubuntu Enterprise Cloud on two PCs, one as Controller, one as a node. I have downloaded two Ubuntu virtual machine images from the Ubuntu Enterprise Cloud Store and can successfully start instances of them with: euca-run-instances -k mykey emi-XXXXXXXX -t c1.medium
If I run this command I can see the instance is running: watch -n5 euca-describe-instances
I can ping the IP address of the VM instance from my Controller but I can't make an SSH connection to it. I'm following the instructions @ [URL] so I have tried connecting with: ssh -i ~/.euca/mykey.priv ubuntu@192.168.1.250
The result is: Permission denied (publickey).
If I try adding -v to the ssh command I get:
OpenSSH_5.1p1 Debian-6ubuntu2, OpenSSL 0.9.8g 19 Oct 2007
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
[code]....
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Feb 15, 2010
I have KDE 4.4 and Firefox 3.6. Whenever I click a link from a plasmoid widget, it tries to open Konqueror and another instance of Firefox. The page actually loads in the opened Firefox window, but the task bar shows an instance of Konqueror and another instance of Firefox, that keeps loading for a while then close. See image below:
I currently have setup the browser default application as "firefox". If I set this option to use the default application, it opens in Konqueror and I don't see additional windows in the task bar. If I change the option to "firefox %u", then it exhibit the same issue, but the process is much faster, so the loading windows don't stay for long in the task bar. Additionally, it opens the link on a new Firefox window and opens the page twice. Although Konqueror is not loaded, the bouncing icon next to the mouse pointer shows up and stay for a while.
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Mar 24, 2011
I need to set up an ubuntu 10.04 instance on ec2, but there are some instance ready available I tried with few but I am not really happy with that since those are meant for test puporse.
I have to deploy a java/j2ee based web app with mysql. 1)need to install tomcat 2)java runtime 6 3) apache web server
What would be the best image to use for my requirement and I initially planning to launch with the micro instance if my web app demands I may further move to small and larger instances. So it should be eligible for free usuage tier.
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Dec 28, 2010
Hi. I need to create second mysql instance on the same server but another port. What is the right way to do that?
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Mar 16, 2010
how to setup multiple instance of postgre server on the same machine.
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Mar 30, 2010
I have set up UEC on a single machine 64 bit blade. I have followed the steps as per the documentation.I am using Managed NOVlan mode. I have installed the Karmic kola image. When I try to run the instance, I get an error "no resources available. Try --addressing private". When I try addressing private, an ip address 172.19.1.2 is assigned and the instance was running.
a) When trying to ping the ip, error displayed that the host is unreachableb) I am also unable to connect to ubuntu@172.19.1.2 using ssh. Error message is displayed that " No route to host".I have searched the forums but couldnt find any solutionPS: I suppose everyone is very busy. I see very limited responses to posts. Sharing your experience and expertise will be helpful for all and will reiterate the meaning of ubuntu
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Apr 14, 2010
I have setrup Ubuntu Enterprise Cloud on a single machine.
1) I am able to run the instances from store (karmic) On running the instance two ips are assigned (public and private) as 10.B.C.X and 172.19.1.2
2) I am able to connect to the instance (10.B.C.X) through ssh (using key)
3) However I am unable to access the instance outside the UEC (using public ip). When I try pinging, I get an error Request timed out or sometimes Destination host unreachable.
4) I have provided the following access using euca-authorize
Details below:
1) Hardware : Blade (64 bit)
2) Version : Ubuntu 9.10; Eucalyptus the one using apt-get install eucalyptus
3) Topology : Single physical system
4) Mode : Managed no-vlan
[Code]...
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Nov 8, 2010
I had installed UEC 10.04. It is a 2 server configuration with CC, CLC, SC and Walrus on one server and NC on another server. I could run instance of images, But when i try to ssh to the instance, it doesn't work.
It shows ssh: connect to host xxx.xxx.xxx.xxx port 22: No route to host. This to me seems there is a problem with my network connection. Pl find below the ifconfig output of the two servers:
Controller:
eth0 Link encap:Ethernet HWaddr 00:0c:29:90:95:17
inet addr:172.18.144.36 Bcast:172.18.145.255 Mask:255.255.254.0
inet6 addr: fe80::20c:29ff:fe90:9517/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
[Code]...
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Jun 23, 2010
I've got my first EC2/cloud instance of Ubuntu up and running. This is my first time really dealing with the server edition. I've loaded Apache, Tomcat, PostgreSQL, and Webmin. I've got a public IP on the instance and it is working. I've opened, for now, ports 80, 8080, 443, and 10000 to 0.0.0.0/0.
I cannot get into Tomcat Manager or Webmin at all through a browser. For Tomcat, I've restarted, stop/started, and verified that Tomcat is running. I installed Webmin all through apt-get commands so any dependencies should have been installed (first time doing it this way), but cannot get to the login screen. But if I just go to the IP, Apache goes to the "It Works." splash page. Did I miss some set up? Is there an internal firewall in Ubuntu Server edition that needs to be set?
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Nov 23, 2010
I have installed vsftpd. When I run the command sudo service vsftpd restart, I get the following response: restart: Unknown instance. But if I run the command sudo service vsftpd start, I get the following response: vsftpd start/running, process 3804. To understand what is happening, I run the command ps aux | grep vsftpd, I get root 3805 0.0 0.0 27120 620 ? Ss 14:00 0:00 usr/sbin/vsftpd.
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Sep 16, 2010
I have a few different Linux servers with samba shares on each of them. Is it possible to administer each of the servers from one SWAT instance?
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Apr 18, 2010
Is there a way to identify and close a given instance of an open nautilus window from a command line?
Or can one identify via a command line that a given instance is open?
I'd like to tag one when it is open with a specific title and then if that is already open not open it again all from the command line.
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Jul 21, 2010
I have a terminal that opens when the system starts and I was wondering if there is any way to keep it specifically, not other terminal windows, from appearing in the window switcher in compiz?
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Nov 1, 2010
I'm trying to install a virtual 10.04 image on a 10.04 server host, and the method I used that worked with 9.10 now fails. For example, I try to install with the following virt-install command (as root):
virt-install --name=star3--escience --connect=qemu:///system --ram=3000 --vcpus=1 --disk path=/disk2/images/star3--escience_60GB_Ubunut10-04.qcow2,size=60 --noautoconsole --os-type=linux --os-variant=ubuntulucid --accelerate --cdrom=/home/mc321/ISOs/ubuntu-10.04.1-server-amd64.iso --network=bridge:br0 --vnc
[Code]....
In fact, that XtreemOS iso (a Mandriva derivative) is what I installed successfully as a quest OS on the same machine when it was running 9.10.
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Jul 17, 2011
I might just be crazy or particularly dumb today but what I'm trying to do is have sed replace the first and second instance of a character on a line but not after that.
Basically it is a csv file with a date formatted as dd/mm/yyyy and I need to completely remove the slashes. No problem using:
Code:
sed 's////g' < file > outputfile
The only problem is that one of the columns after this may also contain these slashes and shouldn't be removed.
I must have read every single sed page on the net today to find a way to do it to no avail! Is it as simple as :
Code:
sed 's////1' < file > outputfile
And then run the same on the output file again? these two slashes will always be the first and second slashes in the file.
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Feb 10, 2010
I'm trying to use tigthvnc (with ssh tunneling) in order to acess remotely my parent's kubuntu desktop. That way I'll give them some support when I'm at my home or office.
Practically I hadn't used vnc with linux, but I recall having used with windows. In linux when I logged to the remote machine (which runs vncserver) it's opens a new instance of X server. I'd like to access to the X session that's already opened. Let's suppouse my parents are logged into X with the user: john. I'd like to access john's session, to see and check his applications. In one word I'd like to vnc in linux behaves the same way as windows.
Is that possible with vnc? I'm using tightvnc. I tried -shared option in client, but no success.
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Jan 5, 2010
how to configure X11 forwadring over SSH so, that when I open any app over SSH, I get displayed window of a process that is already running on my server (in case its running ), not a new instance of it.
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Aug 18, 2010
I didn't have this problem in GIMP 2.6.8: when I double clicked an image file in Nautilus, the file opened in an existing instance of the GIMP, if it was already running. Now, after I compiled and installed GIMP 2.6.10, a double-clicked file opens into a new instance of the program. The same for files that are dropped on the GIMP icon in the panel. The only way to avoid this behaviour is to switch to the running instance of GIMP and use the Open command.
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Mar 10, 2011
I have something like...
Code:
var=beer
# echo ${var/%e/E} doesn't do anything because i can only replace "r" or "er" this way
[code]....
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Mar 15, 2011
On Ubuntu 10.10 I started a 2nd instance of Firefox using the command: Firefox -ProfileManager -no-remote &Created a new profile and everything works smoothly except for the fact that this instance of FF does not obey by GTK2 customizations that I have placed in ~/.gtkrc-2.0.Moreover, only SOME of the customizations are not obeyed. For example, the vertical scrollbars are supposed to be on the left, but they are on the right. The scrollbar arrows are together (Mac-like) as specified, so is the scrollbar width.The first instance obeys all customizations with scrollbars on the left.
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Feb 28, 2010
how to stop the instance before shutting down. I tried dbstop and oracle stop, but neither work.
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Oct 23, 2010
Is there any way to make Dragon Player so there is just one running instance of it at a time? Like if i have something playing and i click on something else to play have it so that the instance currently running changes to the new file instead of opening a new window?
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May 19, 2011
I'm just trying to do simple name-based virtual hosting (different domains/content, same IP).
What I've done is uncomment the "NameVirtualHost *:80" line in listen.conf. Then I have one file "domain.conf" in vhosts.d/ with:
Code:
<VirtualHost *:80>
ServerName www.domain1.com
DocumentRoot /srv/www/htdocs/domain1
<Directory "/srv/www/htdocs/domain1">
[Code]....
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Apr 22, 2010
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first click launches chrome
other clicks will focus the opened window
shift click will open a new instance of chrome
ctrl-shift-click will launch a new instance as admin
Is there anything similar in docky?
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Dec 14, 2010
I've beeb setting up keepalived/haproxy as a load balancer for our site.
If you keep it down to two load balancing instances it works just fine. However, I was told to add a 3rd load balancer to the mix and that adds a new wrinkle. I need to add a new keepalived instance and I can't quite figure out how that's done.
It would seem to me to be an issue of the priorities as that is the only thing I altered in the files. Initially, nodes A and B were set to 101 and 100 respectively. I set node A to 102, node B to 101 and node C to 100... keepalived restarts and the virtual IP is pingable. But the website goes down!
SO then I tried Node A set to 101, node B to 100 and node C to 99. Same thing, I restated keepalived and the site goes down, tho the virtual IP remains pinagble and keepalived and haproxy are running.
here is a sample config file from my setup:
Code:
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 51
[Code].....
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Aug 16, 2010
What is dumping an instance in linux?
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Oct 6, 2010
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Jul 14, 2010
There are 2 IPs assigned to a LINUX machine. Now I installed a Tomcat instance on it. After I started the Tomcat I can access via both IP as follow:
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http://ip2:8080
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Aug 4, 2011
here is contents of .my.cnf :
[mysql]
host=localhost
user=root
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[Code].....
why mysql client can login after mysql instance has been shutdown? there is only one mysql instacne running on my computer.
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Feb 21, 2011
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