Linux

The Cat (concatenation) command is one of the more commonly used commands in Linux/unix open source systems. We can use the Cat command to create one or more files, view the contents of the file, concatenate the files and output the content to the

There are two ways to file links in Linux, one is hard link, also referred to as rigid links, the other is symbolic link, also known as symbolic link. To differentiate between the two, review the common Linux ext2 file system. This filesystem uses

2017-2018-1 20155222 "Fundamentals of Information Security system Design" 10th week IPC mechanism under Linux The communication mechanism between multiple processes under Linux is called IPC (inter-process Communication), which is a way of

Log on to your server with the root user to execute the following command, using it you can check whether your server is in a DDoS attack or not:NETSTAT-ANP |grep ' tcp\|udp ' | awk ' {print $} ' | Cut-d:-f1 | Sort | uniq-c | Sort–nThis command

Tag: Code screen--line XOR does not have Mina content valueNvidia's graphics card is overclocking-enabled, with tools such as afterburning in Windows.But there is no such thing as a ready-made tool under Linux.But Coolbits's settings are also very

OpenstackProjects developed and initiated by NASA and Reckspace, licensed under Apache licensingThree pillar models of cloud computingIaaS: Infrastructure as a serviceProvision of server/virtual host/network Equipment resourcesPaaS: Platform as a

I. VMSTAT BASIC knowledgeVmstat can view system resource usage in real time, such as CPU, mem, IO, etc.procsRColumn represents run and waitCPU time slices The number of processes, if long-term greater than1, descriptionCPU shortage, need to

SH file run:1. Modify to execute permissions:chmod u+x hello.sh2. Operation./hello.sh3, do not use executable permissions to modify, with SH direct operationSh./hello.shDesktop Environment Double-click Run sh file:Mac:1, modify the suffix sh to

The DDNS (dynamic Domain name Server) is an abbreviation for the service.DDNS is the user's Dynamic IP Address mapped to a fixed Domain Name Resolution service, each time the user connects to the network, the client program passes the message Host

I'm thinking about getting in touch .... It is forbidden to reprint ....Brief introductionUse Unix/linux's own Bash and Crond to achieve remote control, and keep bouncing off-line to the public network machine.Utilization methodCreate a/etc/xxxx

Bandwidth or flow rate unit: Kbps Kbyte/sec Kilobytes per second Mbps Mbyte/sec Megabytes per second Kbit Kbits/sec Mbit Mbits/sec 1 ,

Through the Sysfs control Gpio, first access to the/sys/class/gpio directory, the export file to write the Gpio number, so that the Gpio operation interface from the kernel space exposed to the user space, Gpio operating interface including

Examples of Linux backup nginx.conf files:cp/usr/local/nginx/nginx.conf/usr/local/nginx/nginx.conf-20171111 (date)In the process list, look for the master process, whose number is the main process number.View

Install JDK, MySQL, Tomcat, and JDK Tomcat in Linux1 dependent Installation Because some support packages need to be downloaded from the Internet during JDK, Tomcat, and MySQL installation, you need to install the dependencies in advance. yum

Deploy Haproxy 1.7.2, centos7.2haproxy Original article published on cu: Reference: This article involves the installation of haproxy and simple configuration.I. Environment preparation 1. Operating System CentOS-7-x86_64-Everything-15112. Haproxy

VMWare10 Virtual Machine implements drag-and-drop (copy and paste) and folder sharing between the host and the host, and vmware10 Version: HOST: Windows 7 64-bit flagship Edition VMWare 10 + Windows 7 64-bit flagship Edition VMWare 10 +

File Sharing between linux and file sharing in linux Because an application was loaded yesterday, the application will upload files. To ensure file synchronization, you need to share a file. In Linux, Network File Service (Network File System NFS)

Simple full-site HTTPS practice, full-site httpsFirst milestone: Creating httpsCertificate 1 [root @ web01 backup] # openssl req-new-x509-nodes-out server. crt-keyout server. key 2 3 Generating a 2048 bit RSA private key 4 ...........................

SAMBA service construction and samba Construction1. Introduction 1. Understanding Samba is a set of applications that use the SMB (Server Message Block) protocol. By supporting this protocol, Samba allows communication between Linux servers and

CENTOS7 install GITLAB, localization, mailbox configuration and use 1. GitLab Introduction GitLab is an open-source version management system developed using Ruby On Rails. It implements a self-managed Git project repository, which is a collection