Linux

July 29, Marco Linux study on the fifth day, the main content of study:First, the index nodeSecond, hard links and soft linksIii. Redirection and pipingIv. Users and user groups First, index node A node (an index node) is a table item

Guide Today to share with you 10 years of Linux summed up 11 cool Linux terminal commands, through today's article I will show you a series of Linux commands, tools and techniques, I hope to help everyone. 1. Command line

grep command and regular expressiongrep commandgrep, Egrep, FgrepGrep,sed,awk Text Processing Three MusketeersGrep:global search REgular expression and Print out of the line; finds the regular expression and displays the matching rows;Regular

using the system under Linux requires caution, then what is the alternative to it? The standard I/O function library provides the Popen function, which initiates another process to execute a shell command line.Here we call the process calling Popen

1. View Help : [[email protected] ~]# Man CD//view Help documentation for CD instructions 2. Display the current working directory : [Email protected] ~]# pwd/root 3. List the contents of the current directory: LS

Before we introduce sockets, let's look at the protocol TCP and UDP for the transport layer:The difference between TCP protocol and UDP protocolFirst we understand that the TCP protocol and the UCP protocol and the TCP/IP protocol, many people are

Library operations Tools-NM, AR, LDD, Ldconfig, and ld.so under Linux1, NM [options] File lists all the symbols in file [option]-c convert the symbol to a user-level name-When used with a. A file that is a static library, the output maps the symbol

During system maintenance, it may be necessary to review the CPU usage at any time, and to analyze the system condition according to the corresponding information. In CentOS, you can view CPU usage by using the top command. After running the top

Read the default MAC address under Linux Guide The MAC (media access control) computer uses it to define and identify the location of network devices. In the embedded Linux learning inevitably also encounter Mac, this article

Objective:Elk is mainly a combination of 3 software, mainly Elasticsearch search engine, Logstash is a log collection log, Kibana real-time analysis to show.[about the Log collection software, such as: Scribe,flume,heka,logstash,chukwa,fluentd, of

Understand SELinux, set to file SELinux security files, copy, move the impact of SELinux rules, set Apache, VSFTPD SELinux rules1. Understanding SELinux1) DAC: Refers to the control of a user's access to resources, i.e., permissionsMac:selinux tags,

1. Command format:Date [parameter] ... [+ format]2. Command function:Date can be used to display or set the day and time of the system.3. Command parameters:Necessary parameters:%H hours (expressed in 00-23).%I Hours (expressed in 01-12).%K hours

First, the conceptPhysical addresses (physical address)For memory chip-level cell addressing, corresponds to the address bus that the processor and CPU are connected to.This concept should be one of the best understanding of these concepts, but it

How to decompress iso files in Linux and decompress iso files in linux In Linux, how does one extract iso files? You can use the mount command to process [Root @ DB-Server tmp] # ls/tmp/rhel-server-5.7-x86_64-dvd.iso // Tmp/rhel-server-5.7-x86_6

Raspberry Pi configures apache php and Raspberry Pi apachephp      Apache + MySql + Php. 1, InstallationApache Apache can use the following command to install sudo apt-get install apache2 The default Apache path is/var/www/ The configuration file

Install ettercap in CentOS EttercapHttp://ettercap.sourceforge.net/download.php Decompress the package and go to the decompressed directory. #tar zxvf ettercap-NG-0.7.3.tar.gz#cd ettercap-NG-0.7.3 Read README # vim README MANDATORY: // required

Centos7 Firewall configuration application instance reference For simple configuration, refer to learning: -- When permanent is set to permanent, add this parameter at the beginning or end of the command. Otherwise, the setting becomes invalid after

Dynamic Update of DNS and DHCP in CentOS 7 Windows domain has a function, dhcp sends the new ip address data to the DNS server, so that you can easily remotely know a person's computer name. Of course, similar functions can be well implemented in

Crontab: scheduled task execution. Crontab: scheduled task execution. I recently came into contact with the needs of scheduled execution programs, so I learned about crontab. This article first introduces the syntax knowledge of crontab, and then

CentOS Hadoop-2.2.0 cluster installation Configuration For a person who just started learning Spark, of course, we need to set up the environment and run a few more examples. Currently, the popular deployment is Spark On Yarn. As a beginner, I think