Update-alternatives is a tool dedicated to maintaining system command links in Linux systems, which makes it easy to set which command to use by default, which software version, for example, we have both open jdk and Sun JDK Two versions installed in the system. And we want the system to use the sun JDK by default, what should we do? Through the update-alternatives can be very convenient to achieve.To view
Word, tool update-alternatives is the function of the management system under the similar function of the symbolic link, the way is to have a similar function of the program, not directly call the program, but with a unified symbolic link to call, as to the symbolic linkWhich of the similar function programs is pointed to, is configured and managed by the tool update-alternatives.It's very abstract, so let's take an example and see what's going on nat
Alternatives and update-alternatives seem to be the same tool (different for each Linux distribution), so here's an example of update-alternatives. Update-alternatives is a very useful tool in Linux, not only in the Debian series, but also in the Redhat series.Linux has grown to today, and there are so many available s
Guide:Kubernetes a ride on the dust to open, then the enterprise should start to kubernetes migration? Under what circumstances do you really accept it? Some of the technology frontier companies first-step practice is probably the most persuasive and reference value. This article is a good reference.1Kubernetes now rage, it is part of a massive cloud-native movement. All major cloud providers use it as a solution for deploying cloud-native application
The Kubernetes network model is made up of four parts from inside to outside:
The network where the pod interior container resides
The network where the pod resides
Network for communication between pod and service
Network of communication between outside and service
It is recommended that you understand the network model of Docker before reading this article. Refer to the author's first two articles [
What is 1.1 kubernetes?First, it is a new, container-based, distributed architecture leading solution. is an open source version of Google's Borg (large-scale cluster management system).Second, if the system design follows the Kubernetes design idea, then the traditional system architecture and business does not have much to do with the underlying code or function modules (such as load balancing, service se
update-alternatives--Management soft Connect/Word linked (Symbolic links)
Command format
update-alternatives [Options] Command
Detailed description
Update-alternatives can be created, deleted, repaired, soft-connected, and can display information about existing soft links, all of which constitute the Debian alternative system (
Concept GroomingIn order to solve the above-mentioned problem, Kubernetes does not need to find a way, after all, is the network security level of the problem, every service will encounter problems, the industry has a mature solution to solve. Here we look at industry scenarios and related concepts.
Symmetric encryption/Asymmetric encryptionThese two concepts belong to cryptography, which is not easy to understand for the students who have n
Update-alternatives is a tool dedicated to maintaining the system command link in the Ubuntu system, which makes it easy to set which command the system uses by default, which software version, for example, we have both open jdk and Sun JDK Two versions installed in the system. And we want the system to use the sun JDK by default, what should we do? Through the update-alternatives can be very convenient to
http://persevere.iteye.com/blog/1479524Update-alternatives is a tool dedicated to maintaining the system command link in the Ubuntu system, which makes it easy to set which command the system uses by default, which software version, for example, we have both open jdk and Sun JDK Two versions installed in the system. And we want the system to use the sun JDK by default, what should we do? Through the update-alterna
Ubuntu update-alternatives (soft connection management), ubuntualternatives
Update-alternatives-manage soft connections/character links (symbolic links)
Command Format
Update-alternatives [options] command
Detailed description
Update-alternatives can be used to create, delete, repair, and soft connections. It c
Alternatives is a powerful command under Linux. Can only be performed under root permissions. If there are several commands in the system that are very similar, but cannot be deleted at will, then you can use alternatives to specify a global setting.
Alternatives is often used to install multiple versions of the same software in the same system. For example, in
Description: Use the Grafana official plugins (Grafana-kuberneres-app) Link Prometheus show kubernetes informationNote: All monitoring-related information is placed on the Namespace=monitorGithub:https://github.com/grafana/kubernetes-app1, Installation PrometheusProm-rbac.yamlapiVersion: rbac.authorization.k8s.io/v1beta1kind: ClusterRolemetadata: name: prometheus namespace: monitorrules:- apiGroups: [""]
I. Functional roleUpdate-alternatives is a utility for dpkg that maintains symbolic links to system commands to determine what commands the system uses by default.In the Debian system, we may install a number of similar programs and optional configurations, such as Web browser programs (firefox,konqueror), window managers (Wmaker, metacity), and different themes for the mouse. In this way, users can choose when they are using the system to meet their
Alternatives is an important version management tool under UNIX, which was first seen in the Debain system, because its powerful usability makes it a large number of porting in various UNIX environments, And we probably most often use the Java OPENJDK Toolkit in the usual version of the conversion, and in the alternatives implementation of multi-version is the replacement system using the command link to im
Update-alternatives is a tool dedicated to maintaining the system command link in the Ubuntu system, which makes it easy to set which command the system uses by default, which software version , for example, we install both open jdk and sun in the system JDK two versions, and we want the system to use the sun JDK by default, what to do? Through the update-alternatives can be very convenient to achieve.sudo
Alternatives is a powerful command under Linux. Can only be performed under root authority. If there are several command functions in the system that are very similar, but can not be arbitrarily deleted, then use alternatives to specify a global setting.Alternatives is commonly used to install multiple versions of the same software on the same system. For example, in order to develop the need, I need to ins
Use Kubernetes to manage containers on centos 71. Preface
The previous section describes the Kubernetes system architecture, which gives you a preliminary understanding of Kubernetes. However, you may not know how to use Kubernetes. This article describes how to deploy and configure the network environment of the
Alternatives command usage
Alternatives is a powerful command in Linux. It can only run under the root permission. If the system has several commands with similar functions but cannot be deleted at will, you can use alternatives to specify a global setting.Alternatives is often used to install multiple versions of the same software on the same system. For example
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