≡ Menu

Suse

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

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?
[click to continue…]

Linux: Update All Packages Command

How do I update all installed packages on Linux operating systems? How do I perform upgrading packages through a network on Linux operating systems?
[click to continue…]

Linux: Show All Members of a Group

I am a new Linux user and created couple of groups on server. I need to find out all members of a group called “ftponly”. How do I list all members of a group on Linux or Unix-like systems?
[click to continue…]

Unix / Linux: Show First 10 or 20 Lines Of a File

I have a directory with many files. I am trying to write a shell script that will only show first 10 or 20 lines of a file. How do I display first 10 or 20 lines of a file on Linux or Unix-like systems?
[click to continue…]

HowTo: grep All Sub-directory For Files

How do I grep all sub directories? How can I use grep command through all sub-directories on Linux or Unix like operating systems? How do I use grep to find pattern including all subdirectories on OS X/BSD/Unix-like operating systems?
[click to continue…]

Linux / Unix: Rsync Copy Files & Directories Names With WhiteSpaces and Blanks

I need to transfer a file called ‘some cool movie.avi’ that contains whitespace under rsync. How do I escape a filename or directory name with spaces in them while using rsync command under Linux / *BSD / Unix like operating systems? How do I use rsync when files / dirs contain spaces?
[click to continue…]

Ubuntu Linux: Disable Apparmor For Specific Profile / Service Such As Mysqld Server

AppArmor (“Application Armor”) is a security module for the Linux kernel and integrated into both kernel and Ubuntu Linux. How do I disable AppArmor protection for mysql profile / service under Ubuntu or Novell Suse Enterprise Linux?
[click to continue…]

Linux / Unix vi / vim: Open and Switch Between Multiple Files

I am new to Linux sysadmin work. I am using vi / vim text editor to edit files located in /etc/ directory. I open files using

vi /etc/resolv.conf /etc/hosts

I can edit the /etc/resolv.conf file only. How do I switch between the two open files while using vim text editor under Linux / BSD / Apple OS X / Unix like operating systems?
[click to continue…]

TCSH / CSH Shell Set PATH Variable

I am a new Unix / Linux / Apple OS X user. What is my path in CSH / TCSH shell? How do I set or modify path in c shell (CSH) on Unix like operating systems?
[click to continue…]

HowTo: Change Password of Specific User Account In Linux

Hdo I change passwords for specific user account under Linux operating system using the command line?
[click to continue…]