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background With the large-scale application of cloud server, the migration of traditional computer room environment to cloud environment has become a general trend. The cabinet installation, strong and weak current wiring installation, cable power selection, network cable optical fiber selection and connection of traditional computer room ...

  May you be like sunshine, bright and not sad.   1. Cron expression Kelon The unit of time, a krone, is one million years. Cron expression is a string separated by 5 or 6 spaces and divided into 6 or 7 fields. Each field represents a meaning. Cron expression has the following two syntax formats: Seconds Minutes Hours DayofMonth ...

DHCP belongs to application layer protocol port 67 server 68 client UDP How DHCP works Understanding DHCP services DHCP(Dynamic Host Configuration Protocol)Designed and developed by lnternet task forceA protocol designed to automatically assign TCP/IP parameters to computers in a TCP/IP network Benefits of using DHCP Reduce administrat ...

Memory Forensics Forensics file suffix raw,. vmem,. imgCommon commands (imageinfo, pslist, dumpfiles, memdump)Suspicious process (notepad, cmd)Combined with disk ForensicsUnderstand some operating system principlesCommon file suffixes dmg, img Volatile basic commands You can use the - h parameter to get the usage method and plug-in introduct ...

Nginx services Nginx is a high-performance, lightweight Web service software, which has the advantages of high stability, low system resource consumption and high processing capacity for HTTP concurrent connections (a single physical server can support 30000 ~ 50000 concurrent requests) Advantages of Nginx over Apache: Lightweight, also ...

1. What is the Pod life cycle A Pod can contain multiple containers, and a Pod can have one or more Init containers that start before the application container. Init containers are not very different from regular containers, mainly because init runs first, and the main container will not start until the init runs successfully, so the Init ...

1, Introduction to Kubernetes First, it is a new leading solution of distributed architecture based on container technology. Kubernetes(k8s) is Google's open source container cluster management system (Google internal: Borg). With the rapid development of Docker as an advanced container engine, container technology has been applied in Goog ...

Docker data volume – two types of volume and comfort volume plug-ins provided by docker 1, Foreword Why use data volumes: docker hierarchical file system 1. Poor performance 2. The lifecycle is the same as the container docker data volume 1. mount to the host, bypassing the hierarchical file system 2. The performance is the same ...

Background: In terms of linux, the linux operating system will have a main process with pid=1 and derive other processes to control different services For example: PID = 2 -- > Python PID = 3 – > java pid4 – > PHP, the three services may affect each other Users expect to run these three different services in different ...

Role of DNS Service The function of converting domain names to IP addresses DNS concept DNS is a distributed database. The naming system adopts a hierarchical logical structure, just like an inverted tree. This logical tree structure is called domain name space. Since DNS divides the domain name space, organizations can use their own domain ...