Yum package updater

What are repositories and what do they contain? Why software in Linux comes in the form of packages? So, let us begin! The following are the 5 main tasks of yum install new software hire new employees remove unnecessary software fire employees who are not needed anymore update software improve the skillset of employees upgrade system improve the entire organization, not just the employees and maintain a database about software installed in our system maintains the employee records!

Step 1: check the internal database Step 2: check the repository database Step 3: update old packages Step 4: update the internal database Let us learn each of these steps in more detail. Step 1: Check the internal database As we have seen in the article linked above , there is an internal database stored in our computers which contains information about all the software packages presently installed and the versions of each of the software package.

As you can see there are 3 columns, column1: shows the package name openssh-server. So that ends the explanations for Step 1 , let us go to the next step! Step 2: Check the repository database Repositories, simply put, are places on the internet where software is stored by the developers and maintainers of our distros. The next step is to check the repository to see if any newer packages are available. Step 3: Update old packages to newer versions This step is simple, if a newer version is found, yum will update our older package into the newer one!

You need not worry about them. During any package update it goes through below steps :. In the above example, we updated the bash package. You can see command also tried to check and resolve any dependencies for this update process.

Multiple packages can be updated using the same command but supplying more than one package name at the end. In the above example, we updated grep and sudo package using single command. To make your search more accurate, define package names with their version, in case you know. For example to search for a specific version OpenSSH For example, to search all the packages that match the word. Say you would like to know the information about a package before installing it.

To get information on a package just issue the below command. To list all the installed packages on a system, just issue the below command, it will display all the installed packages. Yum provides function is used to find which package a specific file belongs to. To find how many installed packages on your system have updates available, check to use the following command. To keep your system up-to-date with all security and binary package updates, run the following command.

It will install all the latest patches and security updates to your system. In Linux, a number of packages are bundled into a particular group. Instead of installing individual packages with yum, you can install a particular group that will install all the related packages that belong to the group.

For example to list all the available groups, just issue the following command. To install a particular package group, we use the option as groupinstall. Set to false to run while Chef Infra Client is configuring the node the converge phase.

Ruby Type: true, false, :quiet Default Value: false. Continue running a recipe if a resource fails for any reason. A resource may notify another resource to take action when its state changes. Specify a 'resource[name]' , the :action that resource should take, and then the :timer for that action.

A resource may notify more than one resource; use a notifies statement for each resource to be notified. If the referenced resource does not exist, an error is raised.

In contrast, subscribes will not fail if the source resource is not found. A timer specifies the point during a Chef Infra Client run at which a notification is run. The following timers are available:.