Amazon EC2 HowTo - Linux / Unix Q & A from nixCraft

Amazon Linux AMI Install Linux, nginx, MySQL, PHP (LEMP)

last updated October 15, 2019 in Amazon Cloud Computing, Linux, MySQL, Nginx, PHP

How do I install Linux, nginx, MySQL, PHP (LEMP) stack on Amazon Linux AMI running on AWS?

How to install htop on Amazon Linux AMI

last updated October 9, 2019 in Amazon Cloud Computing, Linux, Package Management

I am a new user of Amazon Linux AMI operating system. How do I install htop on Amazon Linux AMI using the yum command?

Amazon Linux AMI install mysql client programs for RDS

last updated October 9, 2019 in Amazon Cloud Computing, CentOS, MySQL, Package Management

How do I install mysql command for management Amazon RDS or Managed Databases for Amazon Lightsail on Amazon Linux AMI?

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

last updated January 26, 2017 in Amazon Cloud Computing, Linux, Mac OS X, OpenBSD, Suse, Troubleshooting, UNIX

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?

Linux / Unix Command To Optimize and Compress PNG Files In Bulk

last updated October 22, 2016 in Amazon Cloud Computing, Debian / Ubuntu, Linux, Package Management, RedHat and Friends, UNIX

I have lots of images in png format (over 250k+ png). Properly formatting and compressing png images can save many bytes of data. How do I compress and optimize png images on my amazon cloud account so that I can save bandwidth on cloudfront cdn account? How do I use an image compressor to create lossless compression on PNG files, with no effect on image quality in bulk using Red Hat Enterprise Linux bash shell?

Linux AWS: Find And Delete All Files Securely So That No One Can Recover It Ever

last updated November 4, 2012 in Amazon Cloud Computing, CentOS, FAQ, RedHat and Friends

I‘m currently using Amazon EBS block level storage volumes for use with Amazon EC2 instances powered by Red Hat Enterprise Linux. This volume stores critical webapp and user data. We are moving out to another cloud provider. How do I find files such as *.logs, *.php, *.gz and few other file patterns and securely delete them so that no one can recover it ever?