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Catalog chmod chown chgrp umask chmod explain Command name: chmod change the permissions mode of a file Command path / bin/chmod Execute permission: all users Function Description: change file or directory permissions grammar chmod [{ugoa}{+-=}{rwx}] [File or directory] chmod [mode=421] [File or directory] -R Recursive modification ...

Kali's version is Kali Linux large 2019.3-amd64 Sogou Pinyin version: sogoupinyin ABCD 2.3.1.0112 ABCD amd64.deb Installation idea: 1, Replace image source 2, Download Sogou Pinyin for Linux 3, Install Sogou Pinyin Four, restart Where there are pits: 1. When adding a source, do not update or upgrade i ...

Variables in Shell System variables Common system variables $HOME, $PWD, $SHELL, $USER, etc 2. Case practice (1) View the value of the system variable [root@hadoop100 learnshell]# echo $HOME /root (2) Display all variables in the current Shell: set [root@hadoop100 learnshell]# set BASH=/bin/bash ...

secret is used to store sensitive information, such as passwords or tokens. Create with file [kubeadm@server1 secret]$ echo -n "admin" > username.txt ##Create user information [kubeadm@server1 secret]$ echo -n "aekhg777" > password.txt ##Create user password file [kubeadm@server1 secret]$ kubectl ...

Preface Now Elasticsearch is used by more and more companies. I have learned some simple operations of Elasticsearch before, but I haven't recorded them carefully, so I forgot them soon after I learned them. Now let's take this time to learn again. This article will mainly introduce how to build a s ...

1. NAT mode schematic diagram NAT (Network Address Translation) Network Address Translation mode When the user requests to arrive at the Director Server, the requested data message will first arrive at the pre routing chain in the kernel space. At this time, the source IP of the message is CIP and the ...

About Ganglia Ganglia is an open source cluster monitoring visualization tool initiated by UC Berkeley, which is designed to measure thousands of nodes. Ganglia's core includes gmond, gmetad and a Web front end. It is mainly used to monitor the system performance, such as: cpu, mem, hard disk utilizat ...

Article directory 1, zabbix monitoring httpd service 2, zabbix monitoring nginx Font adjustment of web interface Add a new monitoring item nginx.accept 3, Different types of picture switching This experiment is based on the previous one, and has monitored server2 and server3 1, zabbix monitor ...

1. Types of data persistence:1.emptyDir: Can only be used as temporary storage.If the container is deleted, the data still exists, and if the Pod is deleted, the data is deleted.2.HostPath: Less scenarios increase the coupling between Pod and nodes.3.PV, PVC: based on NFS services.The PV state must be Available, the access mode must be the sam ...

MySQL highly available KeepAlived dual hosts In the production environment, one MySQL host has a single point of failure, so we need to ensure the high availability of MySQL, that is, two MySQL servers. If one of the MySQL servers hangs up, the other can take over immediately.MySQL's high availability schemes are generally as follows: keepali ...