ccna basic commands

Basic iptables commands in Linux Firewall (Firewalld) is an isolation tool that prevents unauthorized access and makes the host more secure. It mainly works on the edge of the network or host, and matches and checks the communication packets in and out of the network or host according to the predefined rules; handle packets that can be matched by rules.Classification of firewalls:Host firewall: the work sco

used in the route selection protocol. Router rip activates the RIP Protocol Network + direct connection CIDR Block publish direct connection CIDR Block Interface lookback 0 activation logic interface Passive-interface + interface Type + interface number configuration interface is passive mode Debug ip + protocol dynamic view of route update information Undebug all disable all DEBUG information Activate the network routing protocol of the routers, such as the routers, the routers,

inside the container. Inside this container is exactly the same as the normal Linux operation. 3. Container common management commands Docker run creates and launches a container, with the-D parameter followed by run, a daemon container is created to run in the background. Docker ps-a View containers that have been created Docker ps-s View started containers Docker start Con_name boot container named Con_name Containers Docker stop con_name

DOS (Windows) formatPath: The location where an object is storedDivided into: absolute path and relative pathIf the path is preceded by a heel, it is called an absolute pathOtherwise, it is referred to as relative path, relative to the current working directory position.Historical records:History View Historical Commands！ 55 Execution History 55th order！ -55 Execution History bottom 55th order！ CD from historical countdown find

.... (Change the directory itself only)-R: Recursive modification (owner of modified directory and its internal files)--reference=/path/to/somefile file: Sets the owner of the file to be the same as the owner of the Somefile (no need to specify the owner)Chown username:grpname Fiel ... Change both the owner and the groupHown:groupname Fiel .... Modify Genus Group2, modified files belong to group: chgrp: Modify the file group-only the administrator can useBasic attachment parameters are the same

remote host rsh f01n03 date ftp transferring files between the local host and the remote host FTP ftp.sp.net.edu.cnNBSP;RCP copying files between the local host and the remote host RCP file1 host1:file2ping sends a response request to a network host ping hpc.sp.net.edu.cn Mail read and send e-mail mailwrite send a message to another user write username PTS/1NBSP;MESG allow or deny receive messages MESG Nkorn Shell commands Command name function Desc

view system is a few operating systems-R View kernel version of the system-A view detailed system kernel version and system operating systemRZ uploadIf this command is not available in the system, install it using yum install Lrzsz-Y OverlayDirectly input RZ, you can upload filesSZ DownloadIf this command is not available in the system, install it using yum install Lrzsz-Y OverlaySz-y Test.txtSU Switch UserSu RootHistory View Command Chroniclechmod permissions given to

Linux Study Notes 2-linux basic commands and Study Notes 2-linux First blog: linux Study Notes 1-ubuntu installation and basic settings, has introduced how to install the linux operating system and some basic settings and modifications. This blog introduces some basic Conso

1. Command prompt user@ubuntu-hansee:~/test$ global variable PS1 ps2 echo $PS 1: \[\e]0;\[emailprotected]\h: \ w\a\]${debian_chroot:+ ($debian _chroot)}\[emailprotected]\h:\w\$ echo $PS 2: > A few basic hints meaning: \u: User \h: local hostname \w: Current working directory name \T:24 hour time \t:12 hour system Modify the command prompt for the current terminal Direct assignment: ps1= "[\t][\u]$" Modified effect--[09:46:09][user]$

include multiple servers for multiple users to access. In addition, the peer-to feature allows some systems to play the dual role of the client and server. HBase is a distributed, column-oriented, open-source database that comes from the Google paper "Bigtable: A distributed storage system of structured data" written by Fay Chang. The Yonghong Data mart is a software that is based on proprietary technology developed for the storage and processing of information. Yonghong Data Mart's Distributed

Each person builds a HelloWorld project and exercises basic commands such as Git's add/commit/push/pull/fetch/clone. Compare the differences between the old and new versions of the project.steps to use:A) New HelloWorld projectb) Create a local repository and set up git mailboxes, user names, and more Create a Helloworld.java file locallyOpen git Bash and turn git init this directory into a repository that

This section is intended to help you understand some Django The most basic commands, please try to remember them, and practice a lot of1. Create a new Django Project 1 Django-admin.py?startproject?project-name a Project as a project, Project-name project name, change to your own, to meet Python the variable naming convention (the beginning of an underscore

Linux basic commands--related operations of the directoryCommon commands for working with directories: CD: Transform Catalog PWD: Displays the current directory mkdir: Create a new directory RmDir: Delete an empty directory CD (Transform directory)The CD is the abbreviation for Change directory, which is the command used to transform th

The basic commands used for MySQL cluster configuration and the real-time operation process, 1. Check whether you should use a MySQL cluster. Reduce the pressure on the data center nodes and process large data volumes. MySQL is distributed and one or more applications correspond to one MySQL database. Share data with the common data of several MySQL databases, such as shopping cart and user objects, in data

Mac basic commands Daquan basic commands 1. list file ls parameter directory name example: see what is in the driver Directory: ls/System/Library/Extensions parameter-w display Chinese, -l detailed information,-a includes hidden files 2. Conversion directory cd example: Think of a drive directory to slide a circle cd/S

Angularjs (four basic commands in angularjs) and angularjs Of the four basic commands, Note that the usage of the annotated command M is All commands can be combined with each other. If you do not write A restrict command, the attribute command is used by default. To suppor

Linux is a lot of frequently used commands are necessary, here will I learn Linux in the introduction of some of the frequently used basic commands to share with you, hoping to help you.This is the bird in the book I have done a bit, I hope not to deal with copyright issues.1. Instructions for displaying dates: date2. Instructions for displaying the calendar: Cal

There are many common commands in Linux that must be mastered, and here I will learn some common basic commands that I learned from Linux to share with you and hope to help you.This is the bird in the book I have done a bit, I hope not to deal with copyright issues.1. Instructions for displaying dates: date2. Instructions for displaying the calendar: Cal3. Simple

Linux is a lot of frequently used commands are necessary, here will I learn Linux in the introduction of some of the frequently used basic commands to share with you, hoping to help you.This is the bird in the book I have done a bit, I hope not to deal with copyright issues.1. Instructions for displaying dates: date2. Instructions for displaying the calendar: Cal

Linux Basic command Finishing (iii)-----------Process and VimFirst, the process1. View the processPS: Intercepts the state of the program running at a point in timeA: All the processesX: Background processU: Effective user-related processes (common combination aux)-ia: can also observe all the data of the systemAXJF: Together with part of the program Tree State-I: Check out your bash-related programs todayTop: Changes in the dynamic observation proces