How to quickly master and improve Linux operations and maintenance skills

Previously wrote an article on how to learn Linux, got a lot of feedback, everyone is sharing their learning experience and experience, and also put forward a lot of ideas and suggestions. Learning this thing is actually easy to say, it is difficult

Linux command-SED,UNIQ,CUT,WC

SortThe sort command sorts the rows in the files specified by the file parameter and writes the results to standard output. If the file parameter specifies multiple files, the sort command connects the files and sorts them as a file.Sort

Linux command English full name

Su:swith user   switch users, switch to root user cat:concatenate   concatenation uname:unix name   system name Df:disk free   Spare hard drive Du:disk USA GE HDD Usage chown:change owner Change owners chgrp:change Group change user group Ps:process

ansible--bulk Linux/unix Server Management tools

Theoretical part: Common Automated operations Tools: Puppet-Ruby-based development with C/S architecture, strong extensibility, SSL-based, and relatively weak remote command executionSaltstack-Based on Python development, with C/S

Linux permissions, owner, group, other group (other people), Chmod,chown

User groupsEach user in Linux must belong to a group and cannot be independent of the group. Each file in Linux has the concept of owner, group, other group-Owner-Group-Other groups-Change the group where the user is locatedOwnerTypically the

Namespace PID namespace in Linux kernel

Before looking at the Linux PCI device initialization, see a bit dizzy, and then hand-over the notes written before, at the same time rest!! ~(@^_^@)~ This piece of article is written before, which refer to some of the blog of the Daniel!!the

A summary of the system () functions under Linux

Guide Once, it was tortured by the system () function, because the system () function was not well understood. You have to understand the system () function here, because sometimes you have to face it. Let's take a look at a brief

Zip unzip compression and decompression under Linux

NOTE: * Compress into limited. zip format filesCommon decompression:[Email protected] test]# Unzip-o test.zip-d tmp/Unzip the compressed file Test.zip under the specified directory TMP , and require the unzip command to overwrite the original file

Linux FTP Server Setup and FTP server intrusion and defense

FTP is the abbreviation for file Transfer Protocol(document Transfer Protocol), and Chinese is called "Interfax protocol". Used for Two-way transmission of control files on the Internet. with most like Internet services,FTP is also a client /

Linux interprocess communication-Shared memory Shmget (), Shmat (), SHMDT (), Shmctl ()

Here's another way to explain interprocess communication, using shared memory.One, what is shared memoryShared memory, as the name implies, allows two unrelated processes to access the same logical memory. Shared memory is a very efficient way to

"Reprint" Under Linux, a file also has three kinds of time, namely: Access time, modification time, state change time

under Windows, a file has: creation time, modification time, access time. and under Linux, a file also has three kinds of time, namely: access time, modification time, state change time . There is a difference between the two, there is no concept of

6 Excellent mail transfer agents under Linux

The best Linux Mail Transfer agent (MTAs)What is the message transfer agent (MTA)?An MTA is an application that routes and transmits e-mail from one node to another, using a protocol called SMTP (Simple Mail Transfer Protocol) to perform its

Linux Beginner's Guide

1. Why should we study Linux?Why do we have to learn Linux? What value does Linux bring to us?Linux gives me the feeling is stable , free , good performance .stable , where is the embodiment? We use the PC, installed operating system is generally

Linux Process Creation II (EXECVE)

Three: Execve system call int execve (constchar char *const argv[],char *Const envp[]); Fork creates a new process that produces a new pidexecve that completely replaces the image of the calling process with the executed program. EXECVE starts a new

Using Cat and EOF to replace and append files in Linux

This address http://comexchan.cnblogs.com/, author Comex Chan, respecting intellectual property rights, reproduced please specify the source, thank you! =======================================================Overwrite a file content directly or

Linux----diff command

Transferred from: http://www.cnblogs.com/peida/archive/2012/12/12/2814048.htmlThe diff command is a very important tool on Linux to compare the contents of a file, especially to compare two different versions of files to find the changes. Diff

Ubuntu Linux View, edit, compare binary files

There are several ways to view the binary:Method One: HexdumpApt-get Install Libdata-hexdumper-perlAfter installation, you can hexdump the your_binary_file directly.You can also use the HD command directly instead of Hexdump.If you want to look

Nginx High concurrency parameter configuration and optimization of Linux kernel parameters

One, in general Nginx configuration file in the optimization of the comparison has a role in the following:1. worker_processes 8;The number of nginx processes is recommended according to the number of CPUs, usually a multiple of it (for example, 2

Kali basic knowledge of Linux Infiltration (iii): Exploit

The exploit phase utilizes the information obtained and the various attack methods to implement infiltration. An encrypted communication vulnerability diagnosis for a Network application vulnerability diagnostic project must be performed. As the

Linux General permissions and special permissions explained

1. File permissionsFile permissions are primarily defined for three types of objects:Owner: Master, uGroup: Genus, GOther: Others, OEach of these files defines three permissions for each class:Readable:rWritable:wExcutable:xThree file permissions:R:

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