Archive for May, 2008
Monday, May 26th, 2008 by The BCM Team
As you might have noticed in VMWare the default network mode is “Bridged”, which means that your VMWare guest OS will behave as a separate computer with its own IP address. It’s all good except one thing – it requires your PC (on which VMWare is running) to be connected to a LAN. In other words, the network adapter of your computer must have an IP address assigned, otherwise you wont get VMWare networking to work.
Luckly, if you use MS Windows, there is a thing called Loopback network adapter. In Vista, for example, (as I suspect) it’s installed by default (you just have to enable it via settings of your network adapter). In Windows XP, you might have to install it.
What it does is emulates a LAN on your PC and makes it so you don’t need to be connected to a network in order to develop/test your applications on the network. It’s pretty handy if you have a dev server set up in VMWare. Just enable this loopback network connection everytime you are not on the physical network but want to use VMWare.
Read more about loopback adapter
Tags: development server, lan, loopback, network, operating system, virtualisation, VMWare
Categories: Operating Systems, Software
Comments: No Comments »
Sunday, May 25th, 2008 by The BCM Team
Below is a list of common commands in CentOS that I tend to forget:
Crontabs
"crontab -l" – list all crontabs"crontab -e" – edit crontabs
Tags: centos, command, common, Linux, operating system
Categories: Operating Systems
Comments: No Comments »
Saturday, May 24th, 2008 by The BCM Team
If you, like me, got to the point where you have Mindquarry installed on your linux distribution together with Java Runtime but still can not run Mindquarry successfully and the error says something like:
“you need to install mod_perl2 and LWP::Agent” then this post is for you.
To install LWP::Agent: Download it and install by placing into the directory accessible via global PATH variable.
To install mod_perl2: execute in your terminal yum install mod_perl and make sure that the version you are installing is >2.x
Tags: centos, install, Linux, LWP::Agent, Mindquarry, mod_perl2
Categories: Operating Systems, Software
Comments: No Comments »
Friday, May 23rd, 2008 by The BCM Team
If you are using Bash as your terminal, here’s what you need to do:
Edit ~/.bash_profile by adding the following (if you want to set TESTVAR variable to “This_is_a_value” value)
export TESTVAR=This_is_a_value
Tags: bash, centos, environment, Linux, set, variable
Categories: Operating Systems
Comments: 2 Comments »
Thursday, May 22nd, 2008 by The BCM Team
Install software needed by VMware Tools
Note: you need to boot the 1-1 kernel from grub for this to work.
- Install packages to build the kernel modules:
yum install gcc kernel-devel
- Check the running kernel matches the kernel headers:
uname -r # running kernel
rpm -q kernel-devel # installed kernel headers
- If the two versions do not match, run:
yum -y upgrade kernel kernel-devel
reboot
- Find out where the kernel headers are (you may need this later):
ls -d /usr/src/kernels/$(uname -r)*/include
Prepare and install VMware Tools
Note: this guide is for you If you are running the VM inside VMware Workstation 5.5+
- From VMware Workstation: go to VM> Install VMware Tools
- From the VM: mount the virtual cd drive:
mount /dev/cdrom /mnt/
- Extract VMware Tools to:
/tmp/tar -C /tmp -zxvf /mnt/VMwareTools-5.5.3-34685.tar.gz
- Unmount the virtual cd drive:
umount /mnt
- Now run the installer:
cd /tmp/vmware-tools-distrib
./vmware-install.pl
- When asked “Do you want to run vmware-config-tools.pl?”, answer “Yes”.
Tags: centos, install, Linux, server, virtualisation, VMWare tools, Windows
Categories: Operating Systems, Software, Web Development
Comments: No Comments »
Thursday, May 15th, 2008 by The BCM Team
Let’s say you want to checkout from your svn repository that is running on the remote host and on that host the port used for ssh is not the default (port 22).
You cannot use a custom port in the following command:
svn co svn+ssh://username@example.com/home/username/repository_path
What you need to do is edit the following file: ~/.subversion/config and add (under [tunnel] section) a similar line to:
myremotessh= ssh -p 1122
What this does is sets up a custom protocol that you can use in your command to ssh to a custom port number. So, to use the above setting we’d have to run something like this:
svn co svn+myremotessh://username@example.com/home/username/repository_path
This way, if you want to use svn+ssh on port 22 you can still do, while setting up custom protocols for hosts that have ssh running on custom ports.
Tags: checkout, custom, Linux, port, ssh, subversion, SVN
Categories: Operating Systems, Software
Comments: No Comments »
Wednesday, May 14th, 2008 by The BCM Team
These instructions are for Windows environment.
- Download a private key and an x.905 certificate from your control panel on Amazon website and place them into the same folder as the batch file and EC2 Command line tools mentioned below.
- Configure your environment variables. I suggest either add the settings to your Windows installation options or use the following batch file:
@echo off
set EC2_HOME=C:\ec2
set PATH=%PATH%;%EC2_HOME%\bin
set EC2_PRIVATE_KEY=%EC2_HOME%\privatekey.pem
set EC2_CERT=%EC2_HOME%\certificate.pem
set JAVA_HOME=C:\Program Files\Java\jre1.6.0_xx
"%JAVA_HOME%\bin\java" -version
“privatekey.pem” and “certificate.pem” are the files mentioned above.Be sure to have Java Runtime Environment 1.5+ installed. You will also need to download EC2 Command Line tools from Amazon AWS Resource Center page.
- Choose an Operating System image (AMI) that you will be using as a base for your server OS installation. For example, I am using an image of a base install of CentOS 5.0
- You can see a list of all available images using the following command “
ec2-describe-images -x all“. Here, “-x all" means show all available images available. Each image has a unique number listed before the description. You will need this number to refer to the image.
ec2-add-keypair <private_key_file_name> – generate private/public key file to use with SSH client that you choose to use. Where <name> is a name of a file ofec2-run-instances ami-08f41161 -k <private_key_file_name> – run an instance of your AMIec2-terminate-instances <instance_number> – terminate a running instanceec2-authorize default -p 22 and ec2-authorize default -p 80 – open ports for HTTP and SSH2ec2-describe-instances – display stats for your AMIsec2-upload-bundle --retry -b <your bundle name> -m /mnt/image.manifest.xml -a <your access key> -s <your secret access key> – copy bundled AMI to your S3 storageec2-bundle-vol -d /mnt -k /mnt/<private_key.pem> -c /mnt/<certificate.pem> -u <aws_user_number>ec2-upload-bundle --retry -b <your-s3-bucket> -m /mnt/image.manifest.xml -a <aws-access-key-id> -s <aws-secret-access-key>-
ec2-register <your-s3-bucket>/image.manifest.xml
Tags: amazon, ami, cloud, ec2
Categories: Cloud Computing
Comments: No Comments »
Tuesday, May 13th, 2008 by The BCM Team
service <service_name> start.
For example: service httpd start
Tags: centos, Linux, manual, service, start
Categories: Operating Systems
Comments: No Comments »
Tuesday, May 13th, 2008 by The BCM Team
To convert a Propel object (a database row representation) to a normal array use the following:
$member->toArray(), where $member is a propel object.
Tags: array, convert, model, PHP, Propel, Symfony
Categories: Programming
Comments: No Comments »
HTML
