SSH: WARNING: UNPROTECTED PRIVATE KEY FILE! Error and Solution

in Categories , , , , , , last updated January 26, 2017

I‘m setting up server on an Amazon EC2 compute instance powered by Suse Enterprise Linux server. I am using the following command to login into the my EC2 compute from OS X/Ubuntu desktop:

ssh -i suse-ec2-server-jp.pem root@ec2-xx-yy-zzz-yyy.compute-1.amazonaws.com

I am getting the following error:
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: UNPROTECTED PRIVATE KEY FILE! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions 0440 for 'suse-ec2-server-jp.pem' are too open.
It is recommended that your private key files are NOT accessible by others.
This private key will be ignored.
bad permissions: ignore key: suse-ec2-server-jp.pem
Password:

How do I fix this problem and login using ssh command?

GCC: Linux gnu/stubs-32.h: No such file or directory

in Categories , last updated March 19, 2013

I have Debian / Ubuntu Linux. I need to compile software written in C. The gcc throwing an error that read as follows:

gnu/stubs-32.h: No such file or directory compilation terminated. make: *** [foo.o] Error 1

How do I fix this problem under Debian or Ubuntu Linux 64 bit system and compile apps using gcc compiler?

HowTo: Firefox Disable Default PDF Viewer / Plugin

in Categories last updated March 7, 2013

I recently updated my Mozilla Firefox. Firefox now includes a built-in PDF viewer that allows me to see PDF files found on the web without a plugin. The built-in PDF viewer is enabled by default. However, I found that this pdf viewer is not working properly with various web-sites, and it works slowly. How do disable the built-in PDF viewer so that I can use the Adobe PDF viewer or other PDF viewer that is shipped with my operating systems?