Linux

When we are having problems with Linux, we seek help primarily in three ways: Help,what Is,manA. Help1. Function : Help command • Used to display a summary of usage and a list of parameters that can be used to view the usage of most commands2. Usage

Build DHCP service on Linux system server, realize two basic functions: 1, automatically assign IP address, 2, specify IP address manually.First prepare two virtual machines as the experimental object, a Linux system as a server, a windows7 system

3. Basic Commands-2Basic Commands-2Compression and archivingPack: Archive, similar to pack before travelCompression: To reduce the amount of disk space used, backup can be done to save network bandwidth when transferring over the network.Packaged

Basic commandsThe basic principles of 1.Linux:1, consisting of a small program with a single purpose; a combination of small procedures to complete complex tasks;2, all documents;3, try to avoid capturing the user interface; (try not to interact

The grep command in a Linux system is a powerful text search tool that uses regular expressions to search for text and print matching lines. The grep full name is global Regular expression Print, which represents the globally regular expression

I. Introduction TO Services for NFSNFS is the network file system. The main function is to allow different servers to share files or directories across the network. NFS clients are typically application servers (such as web, load balancing, and so

I. Introduction of RSYNCrsync (remote sync) is the next magical data mirroring backup software for UNIX and Unix-like platforms, unlike FTP or other file transfer services that require full backup, and rsync can make differential (incremental)

First, the Introduction of NFSNFS is an abbreviation for the network File systemNFS was first developed by Sun, 2,3,4 three editions, 2 and 3 were drafted by Sun, and 4.0 began to be involved and led by NetApp, with the latest version of 4.1NFS data

--add: Adds the specified system service, allows the chkconfig instruction to manage it, and adds relevant data to the system-initiated narrative file--del: Deletes the specified system service, is no longer managed by the chkconfig instruction, and

Lsof (list open files) is a tool that lists open files for the current system. In a Linux environment, everything is in the form of files, with files that not only access regular data, but also access to network connectivity and hardware. So, Lsof

Under Linux, the entire station-related files can be downloaded by a single command.Parameter description: -r: Recursive download-P: Download all elements such as images used to display HTML pages-K: Back up the file X before converting it to X.

Virtual machines: VMware virtual machinesSystem: Linux ubuntu 4.4.0-31-generic #50 ~14.04.1-ubuntu SMP Wed Jul 01:07:32 UTC x86_64 x86_64 x86_64 gnu/linuxSee "bird Brother's private food-server set up" when, with the book to hit the command when

Ansible automation software based on Python developmentFeatures Overview:Configuration files do not require too much configuration to understand it.# # #部署ansble软件# #受控主机部署 Backup Nfs01 web01Yum Install-y Libselinux-python# #管理主机部署m01Yum-y Install

Today, I decided to start learning Linux commands and shell scripts, and use Linux to learn (command line, Shell and other knowledge points) This series of records of their own mental process, content is not in order, only recorded their own feel

First introduce the alias of the command, how to view it? Let's use the which command to see what the complete command is [[email protected] ~]# which lsalias ls= ' ls--color=auto '          /usr/bin/ls[[email protected] ~]# which Llalias ll= ' ls-l-

I. Introduction to DNS ServicesDNS is the abbreviation for the computer domain Name System or domain name Service, which consists of a parser and a domain name server. A domain name server is a domain name and corresponding IP address that holds all

We often use the sudo command under the ordinary user, in order not to switch the root user frequently, we can add ordinary users to sudoers inside. Linux defaults to not adding users to the Sudoers list, and requires root to manually add the

One, rsync through the service synchronizationrsyncd.conf configuration file DetailedPort: Specify on which port to start the RSYNCD service, which is port 873 by default.Log file: Specifies the log files.PID file: Specify the PID files, the role of

One, freeDisplays the unused and used memory states of the current system, including physical memory, virtual swap file memory, shared memory segments, and buffers used by the system core, etc.1. Parameter description-B: Displays memory usage in

When we need to control access to shared resources, we can use a simple lock-up method to control. We can create a read / write program that shares a shared buffer and uses a mutex to control access to the buffer. 　The function pthread_mutex_init ()