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LVM logical volume management brief introduction LVM is the abbreviation of Logical Volume Manager (logical volume management). It is a mechanism for managing disk partitions in Linux environment, which can dynamically adjust the partition size. Physical volume (PV): a real physical hard disk or partition.Volume group (VG): multiple phys ...

1, docker installation (Linux) 1. docker official website https://www.docker.com Note: during the installation process, you need to log in root on linux, otherwise some commands will be blocked 2. Find the documentation for installing docker in CentOS Click Developers Docs, as follows: Click Download And Install as follows: Click do ...

1, System clock 1. Clock tree 1. The system main frequency of mx6u is 528MHz, but by default, the internal boot rom will set the main frequency of I.MX6U to 396MHz 1. The system clock of mx6u-alpha development board comes from two parts: 32.768KHz crystal oscillator and 24MHz crystal oscillator. The 32.768KHz crystal oscillator is the RTC ...

1, Linux command line Basics Linux command is an instruction or program used to realize a certain kind of function. When executing most commands in Linux, you should find the program corresponding to the command [root@server1 ~]# hostname #Query host name localhost [root@server1 ~]#which hostname #Program corresponding to query command / ...

IPSec protocol helps the IP layer establish a secure and trusted packet transmission channel. At present, more mature and stable open source projects such as strongswan and openswan have been controlled by the protocol layer. But in the end, they all use the XFRM framework of the kernel to package, send, receive and unseal messages, but the for ...

macvlan is a virtual network interface of linux. macvlan allows you to configure multiple virtual network interfaces on one network interface of the host. These network interfaces have their own independent mac address and can also be configured with ip address for communication. The virtual machine or container network under mac VLAN shares th ...

Port reuse is a classic problem in network programming, and the knowledge points in it are very cumbersome. This paper briefly introduces so through the code_ Reuseaddr, but so will not be involved_ REUSEPORT. For a long time, we all know that we can't listen to the same port. For example, the following code. server1.listen(8080); server2.li ...

catalogue 1 Experimental Environment 2 match ing conditions 2.1 match by agreement 2.2 match by source IP 2.3 matching by destination IP 2.4 press to enter network card device matching 2.5 match by output network card address 2.6 match by source port 2.7 match by target port 2.8 other matches 3 action jump (target) 3.1 LOG 3.2 ACCE ...

A long time ago, it was said that a wave of Kubernetes clusters would be installed on the virtual machine, but it reported an error once before. Later, it has not been reinstalled. Taking advantage of the holiday and rest these days, another wave was reinstalled, which can be regarded as done. This article will share with you the precautions fo ...

Neighbors can be simply understood as one hop distance on the third floor. The next hop of the route may not be the one hop distance of the direct connection (iterative routing), but it is the one hop distance when it finally reaches the neighbor subsystem. Usage of linux iterative Routing: https://www.jianshu.com/p/070202b6d3ca The neighbor s ...