Linux

The file parameter is actually a directory that reports all the files in that directory. If the file parameter is not provided, the DU command uses the files in the current directory.If the file parameter is a directory, then the number of reported

One: The accident processIn the company a quasi-production environment (fortunately is quasi-production) due to the company a service log level is not adjusted to error, resulting in a large number of logging to the/root directory (note that/root is

1. ConfigurationVim/etc/mail.rcAdd the following to the end of the fileSet from=[email protected]smtp= "Smtp.qq.com"Set smtp-auth-user= "[email protected]"Smtp-auth-password="123456 "Set Smtp-auth=loginDescription:From: The sender that appears when

Network Configuration Common commands Introduction:The function of the network kernel in Linux1. Execute command generated address:(effective immediately after execution, service restart after the

1: Create file: Touch file nameThe touch command can also change the access time and modification time of an existing file without changing the contents of the file.Change modification time only touch-m file nameChange access time only touch-a file

Many children's shoes for if you are unfamiliar with the commands for uploading and downloading at the character terminal, here's how to upload and copy files via SFTP and SCP commands.First look at the SFTP command:For example: Now I have two VMs,

Recently in the forum to see someone asked how Linux set only allow domain name access to the site and prohibit IP access to the site, before they have used this function, you can prevent others to use IP address to visit their own site, below I

[Note that during the installation process, some commands are not found, just yum isntall a bit.]Here's my success at CentOS release 6.4.Installation of RABBITMQ:RABBITMQ is based on Erlang, so you must first configure the Erlang environment.Unzip

OverviewIn some common devices ssh, SCP, do not enter the password can save a lot of time.Generate keySee if there is a local key, if there is, do not generate, otherwise it will affect the previous device.Copy the code code as follows :(brother

Introduction of environment variable fileTransferred from: http://blog.csdn.net/cscmaker/article/details/7261921Environment variables in Linux include system-level and user-level, system-level environment variables are system variables to be read by

By the November, half of the semester, and the "Information Security system Design Fundamentals" This course also to the midterm. So, I'm here, on the first half semester of the most basic knowledge, do a reviewReview plan is divided into two steps,

Test method: Expression: expressed, expressed[Expression][[Expression]]Test expressionThere are three common conditions tested in bash:1. Integer test:-eq equals-lt less than-ne Not equal to-GT Greater than-le less than or equal to-ge greater than

Restrict IP Login:(1): Directory/etc/under Hosts.allow to allow login IP configuration file(2): Directory/etc/under Hosts.deny to restrict IP profilesAdd IP or network segments in/etc/hosts.allow that allow SSH loginSshd:192.168.0.10:allow orSshd:192

VI is the standard editor for UNIX and Linux systems. Once you learn it, you will be in the world of Linux. Basically VI can be divided into three states, namely the command mode, insert mode, and the bottom line mode.The VI Editor is the standard

Command Page It's in the /dev/pts .Add IPIP addr Add 172.25.254.xxx dev eth0Increase GatewayRoute add default GW 172.25.254.251View GatewayRoute-nPhysical and virtual machines do not implement communication steps in the same network segmentBrctl

In Unix-like systems, you can use top to view information such as system resources, processes, memory consumption, and so on. View network status You can use Netstat, nmap and other tools. To see real-time network traffic, monitor TCP/IP

Vi (Visual Editor) Common commands, vieditor Visual Editor is an effective and relatively simple full-screen editing tool that allows you to create and edit files, including documents, reports, and text, just remember a few basic commands, you can

Linux basics-in-depth discussion of Unit 7 users, groups, and permissions How to View File PermissionsLs command detailsRoot User and file security controlWhat is a root user?User categoryFile Operation permissionCharacter representation of file

Centos compression and packaging, Centos compression and packaging This is basic knowledge, but some things are like this. If it is useless for a long time, it will be forgotten. In the past, there was a bad habit of not taking notes, after learning

Git terminology Chinese and English table, git Chinese and English table English Chinese English Chinese English Chinese Repository Repository and version Library Merge Branch merge Snapshot Snapshots