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Authority meaning We all know that using ls -l can view file or directory information, including file permissions, such as the permission "lrwxrwxrwx." of "/ bin" below, These eleven bits are usually called permission bits, and the last "." It was added after RedHat 6, so what is the meaning of these eleven ex ...

Linux wget is a tool for downloading files. It is used on the command line. It is an essential tool for Linux users, especially for network administrators. They often have to download some software or restore and back up from the remote server to the local server. If we use a virtual host to handle such transactions, we can only download it fro ...

Introduction to drbd 1. What is DRBD? DRBD (Distributed Replicated Block Device) is a software implemented, non shared storage and replication solution that mirrors the contents of block devices between servers. DRBD is a mirror block device that mirrors the same data block by data bit. 2. Difference between DRBD and RAID1 RAID1 also real ...

I. ingress 1 ingress Ingress is an API object that manages the external access of services in the cluster. The typical access method is HTTP. Ingress provides load balancing, SSL finalization, and name based virtual hosting 1.1 description Node( Node): Kubernetes One of the working machines in the cluster is a part of the cluster. ...

Linux -- basic command usage (Part 2) 1, linux user 1. What are users Users are used to run some processes and own some files or directories. In Linux, users are divided into three categories: root user , system users, ordinary users. The user is uniquely identified by UID, and the root user UID is 0. The system user UID range is 1-999. The ...

1. Set up zookeeper cluster 1.1 problems This case requires: Set up zookeeper cluster1 leader2 follower s1 observer 1.2 steps To implement this case, you need to follow the following steps. Step 1: install Zookeeper 1) Edit / etc/hosts and all cluster hosts can ping each other (configured on Hadoop 1 and synchronized to node-0001, ...

Manually deploy ob triple-copy cluster 1. IP Address and Machine Planning Machine os:centos 7.5 8c12g IP Addresshost nameMachine RoleExplain192.168.32.111obce01observer+obproxy192.168.32.112obce02observer192.168.32.113obce03observer+obproxy192.168.32.114obce04observerAdd, Expand192.168.32.115obce05observer+obproxyAdd, Expand Note: The machin ...

Command basic format command prompt [root@localhost ~]# root: represents the currently logged in user.Localhost: short host name of the current system (use the "hostname" command to view the full host name: localhost.localdomain)~: represents the current directory, the tilde represents the home directory, the super user home ...

I Format of shell script file shell script file generally consists of three parts: interpreter, command code and comments. [root@server ~]# cat test #!/bin/bash <<notes Here are multiline comments notes echo 'hello world' # Here is a single line comment echo valar morghulis [root@server ~]# sh test hello world valar morghulis The fi ...

catalogue 1, Operation mode of QEMU 2, QEMU executes programs in user mode 3, System mode usage of QEMU 1, Operation mode of QEMU He directly excerpted his "uncover home router 0day vulnerability mining technology", checked it online and found no satisfactory QEMU instructions, so he adopted the introduction in this book. If you ...