HOW TO VERIFY CHECKSUM IN LINUX

WHAT IS CHECKSUM IN LINUX? Checksum is like a digital fingerprint of a file. In technical terms, A checksum is a small-sized datum from a block of digital data for the purpose of detecting errors which may have been introduced during its transmission or storage. Well, checksum is a long string of data containing various letters and numbers. You’ll generally find them while downloading files from the web, e.g. Linux distribution image, software packages etc.Most common use of checksum is in checking if the downloaded file is corrupted. For instance, Ubuntu MATE download page includes SHA256 http://linuxthegreat.blogspot.in/2017/04/how-to-verify-checksum-in-linux.html

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Terraform

Terraform is a tool for building, changing, and versioning infrastructure safely and efficiently. Terraform can manage existing and popular service providers as well as custom in-house solutions. Configuration files describe to Terraform the components needed to run a single application or your entire datacenter. Terraform generates an execution plan describing what it will do to reach the desired state, and then executes it to build the described infrastructure. As the configuration changes, Terraform is able to determine what changed and create incremental execution plans which can be applied. The infrastructure Terraform can manage includes low-level components such as compute instances, storage, and networking, as well as high-level components such as DNS entries, SaaS features, etc. The key features of Terraform are: Infrastructure as Code : Infrastructure is described using a high-level configuration syntax. This allows a blueprint of your datacenter to be versioned and...

Salt stack issues

The function “state.apply” is running as PID Restart salt-minion with command: service salt-minion restart No matching sls found for ‘init’ in env ‘base’ Add top.sls file in the directory where your main sls file is present. Create the file as follows: 1 2 3 base: 'web*' : - apache If the sls is present in a subdirectory elasticsearch/init.sls then write the top.sls as: 1 2 3 base: '*' : - elasticsearch.init How to execute saltstack-formulas create file /srv/pillar/top.sls with content: base : ' * ' : - salt create file /srv/pillar/salt.sls with content: salt : master : worker_threads : 2 fileserver_backend : - roots - git gitfs_remotes : - git://github.com/saltstack-formulas/epel-formula.git - git://github.com/saltstack-formulas/git-formula.git - git://github.com/saltstack-formulas/nano-formula.git - git://github.com/saltstack-f...

Helm: Installation and Configuration

PREREQUISITES You must have Kubernetes installed. We recommend version 1.4.1 or later. You should also have a local configured copy of kubectl . Helm will figure out where to install Tiller by reading your Kubernetes configuration file (usually $HOME/.kube/config ). This is the same file that kubectl uses. To find out which cluster Tiller would install to, you can run kubectl config current-context or kubectl cluster-info . $ kubectl config current-context my-cluster INSTALL HELM Download a binary release of the Helm client. You can use tools like homebrew , or look at the official releases page . For more details, or for other options, see the installation guide . INITIALIZE HELM AND INSTALL TILLER Once you have Helm ready, you can initialize the local CLI and also install Tiller into your Kubernetes cluster in one step: $ helm init This will install Tiller into the Kubernetes cluster you saw with kubectl config current-context . TIP: Want to install into a different cl...

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