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Increase Swap Space to Amazon EC2 Linux

Type the following command with count being equal to the desired block size: dd if=/dev/zero of=/extraswap bs=1M count=4024 Setup the swap file with the command: mkswap /extraswap To enable the swap file immediately but not automatically at boot time: swapon /extraswap To enable it at the boot time, add the following entry into /etc/fstab: /extraswap […]

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How to find the IP address of an amazon EC2

Question : How to find the IP address of an amazon EC2 by using linux command Ans : If you run “ifconfig –a” on an amazon ec2 instance (linux), it will give you the internal IP address, which is not accessible from outside world. Here is a way to get the public and private IP […]

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script to change hostname for AWS instance

If you want to set the public DNS as a hostname to the AWS linux  server then you can set it by using following scripts. The default public DNs for the AWs instance in the format “ec2-51-163-230-103.compute-1.amazonaws.com” and when we create the instance from AWs then it set internal hostname for the server. We can […]

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Resize root Volume on AWS Linux Instance

I have created a new CentOS Linux instance. I had selected 50GB of root volume during creating of instance but when system comes online it was showing only 8GB of disk is usable. I tried to resize root disk using resize2fs, I get the following message root@tecadmin [~]# resize2fs /dev/xvda1 The filesystem is already 16775167 […]

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