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Month: October 2015

Install OpenStack on KVM – How To Configure KVM for OpenStack

October 21, 2015September 8, 2018 4 Comments

Typical OpenStack cloud setup consists of more than one node (usually one Controller node and several Compute nodes), which requires lot of physical computers / servers available to perform the installation. This complicates the situation, especially if we need to […]

Grzegorz Juszczak Cloud Computing, Virtualization

How to Disable or Enable SELinux on CentOS / Fedora / RHEL

October 16, 2015September 19, 2016 No Comments

SELinux (Security Enhanced Linux) is an additional method of Linux system protection. It’s a group of security contexts that determine which process can access which files, directories, ports, etc… SELinux has three modes: Enforcing: SELinux protects files, directories, ports against […]

Grzegorz Juszczak Linux, Security

How to compare two files in Linux command line

October 12, 2015September 19, 2016 No Comments

You can compare two text files in Linux using the following command-line tools: – diff – vim / vimdiff These tools are already installed “out-of-the-box” in most Linux distributions.

Grzegorz Juszczak Bash, Linux

How to Configure Passwordless SSH Login in Linux

October 8, 2015October 27, 2015 No Comments

Secure Shell (SSH), besides standard password authentication, gives us the possibility to authenticate using private – public key relation. This allows us access remote systems without typing the password each time we want to connect and the connection is still […]

Grzegorz Juszczak Linux

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