Programmer Help

Ubuntu Install UFW firewall sudo apt-get install ufw For general users, only the following settings are required: sudo apt-get install ufw sudo ufw enable sudo ufw default deny The above three commands are safe enough. If you need to open some services, you can use sudo ufw allow. Enable sudo ufw enable sudo ufw default deny #Aft ...

1. Installation 1. Add ppa source sudo add-apt-repository ppa:openjdk-r/ppa 2. Upgrade system apt-get source sudo apt-get update 3. Install jdk8 Elasticsearch was developed in practical java, so JVM is required to run, so we need to install jdk sudo apt-get install oracle-java8-installer 4. Check jdk Execute the follow ...

This blog is based on the single node installation of redis. If you have not installed a single node small partner, please refer to this blog: https://blog.csdn.net/weixin_44422604/article/details/106876756 1, Building a redis cluster (cache cluster) 1. The redis on node1 has been installed. Now, stop ...

Article catalog 1, Account security control 1.1: basic measures for account security 1.1.1: system account cleaning 1.1.2: password security control 1.1.3: command history, automatic logout 1.2 user switching and rights raising 1.2.1: su command - switch user 1.3: PAM security authentication in Li ...

background Docker Hub sometimes encounters difficulties in retrieving mirrors in China. Generally, the network is slow and takes a long time. It is very likely that the connection is broken and the mirror cannot be pulled out.At this point, you can configure the Mirror Accelerator.Many cloud service ...

Elasticsearch is an open-source distributed RESTful search and analysis engine, which enables you to store, search and analyze a large number of data quickly and almost in real time, and can solve more and more different application scenarios. For example, it can be used to search the products of the online store, the search of users, and the ...

  catalog   01 basic concept of embedded, building of embedded development environment, building of target machine, building of TFTP service, building of NFS service 1. System migration overview and environment construction 1. General embedded system software components 2. Conditions and prospe ...

Article catalog 1 Introduction to docker 1.1 advantages of docker 1.1.1 fast and consistent delivery of applications 1.1.2 responsive deployment and expansion 1.1.3 light and efficient 1.2 Docker architecture 1.2.1 Image image 1.2.2 Container 1.2.3 Repository 2 Docker installation 2.1 CentOS i ...

kalibr installation and compilation under Ubuntu 18.04 + ROS melody Attention & emphasis: any course must be browsed first, and there is a general idea in mind. Follow the process step by step, and you can have an early warning before falling into the pit Recommended tutorials: Joint calibration o ...

Recently, at 618 discounts, I bought Raspberry Pie 4 to use as a computer for my baby.After that, I played it by myself and made a simple scanner. Raspberry Pie 4 related hardware procurement 4GB version of Raspberry Pie 4.Officially priced at $65, Jingdong 300 is reduced from 40 to 389. Micro HDMI to HDMI cable.Raspberry Pie 4 replaced the po ...