chmod command – nixCraft

How to disable ssh motd welcome message on Ubuntu Linux

May 29, 2017in Debian / Ubuntu, Linux, Ubuntu Linux last updated May 29, 2017

I want to disable the message of the day (motd) welcome message after I login over ssh on Ubuntu Linux. How do I disable motd on Ubuntu Linux 17.04?

How to copy permissions from one file to another on Linux

March 16, 2016March 16, 2016in BASH Shell, CentOS, Debian / Ubuntu, Linux, RedHat and Friends, Suse last updated March 16, 2016

I need to copy or clone file ownership and permissions from another file on Linux. Is there a bash command line option to clone the user, group ownership and permissions on a file from another file on Linux operating system?

Bash: .* Considered Harmful To Match Dot Files. Why?

April 24, 2013April 25, 2013in BASH Shell, Linux, Troubleshooting, UNIX last updated April 25, 2013

How do I match dot files under Unix / Linux using bash shell? Why .* considered as harmful when matching dot files under bash shell?

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

April 9, 2013January 26, 2017in Amazon Cloud Computing, Linux, Mac OS X, OpenBSD, Suse, Troubleshooting, UNIX 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 [email protected]

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?