linux basic tutorial

Linux basic tutorial-three software installation methods Linux software installation methods include rpm installation, source code compilation, and yum installation. 1. rpm Installation Method The rpm installation method is the same as that for windows. The essence of software installation: The process of copying the

we're working on Linux to tell the file which owner it belongs to and which group it is. So we need to know how to set ": settings file owner, group Chown:change owner >chown host filename >chown. Group filename >chown host. Group filename >chown-r host. Group filename// Recursively set the file's owner and group >chmod-R 777 filename//Recursively set permissions information for the directory operation is not very simp

Tags: 3.5 XML file Group X86_64 Engineering SSI make open keyboardLinux Basic Environment _ Installation Configuration Tutorial(CentOS7.2, JDK1.8, Tomcat8) Install package version 1) vmawre-workstation version PackageAddress:https://my.vmware.com/web/vmware/details?downloadGroup=WKST-1411-WINproductId=686rPId=20814Package Name: Vmware-workstation-full-12.5.7.20721.exe2) CentOS Version PackageA

-d# 测试关机[[emailprotected] system]# halt -w# 重启系统[[emailprotected] system]# reboot# 关机并关闭电源[[emailprotected] system]# poweroff# 重启[[emailprotected] system]# init 6# 关机[[emailprotected] system]# init 0In the above command, when using man to view the help, you will find halt, Poweroff, reboot are the same, the other three commands is a program, as follows:Shutdown and restart summary Shutdown-r is used to restart, equivalent to reboot Shutdown-h-P is used to shut down the system and p

Linux iptables firewall basic application tutorial Iptables is a common firewall software in Linux, the following describes how to install and clear iptables rules. iptables only supports the specified port. iptables shields basic applications of iptables, such as specified

Basic Linux tutorial-command execution sequence control and PipelinesIntroduction Efficient use of Linux skills, such as sequential execution, select execution, pipeline, cut command, grep command, wc command, and sort command.1. Control the command execution sequence 1. Execute multiple commands in sequence Generally,

Http://www.vpser.net/security/linux-iptables.html iptables is commonly used on Linux firewall software, the following VPS detective to everyone said Iptables installation, clear iptables rules , iptables only open the specified port, iptables shield the specified IP, IP segment and unblock, delete the added iptables rules, such as iptables basic applications.1. I

Basic tutorial: Use the svn command svnupdate in linux. if there is no directory after it, all files in the current directory and subdirectory are updated to the latest version by default. 1,Run the file checkout to the local directory. Svn checkoutPath (path is the directory on the server) Example: svn checkout svn: // 192.168.1.1/pro/domain Abbreviation: svn co

{} /tmp/temp/[[emailprotected] test]# ll /tmp/temp/总用量 20-rw-r--r-- 1 root root 6 8月 12 00:14 1.txt-rw-r--r-- 1 root root 6 8月 12 00:14 2.txt-rw-r--r-- 1 root root 6 8月 12 00:14 3.txt-rw-r--r-- 1 root root 6 8月 12 00:14 4.txt-rw-r--r-- 1 root root 19 8月 12 00:14 test.txtThe differences between the-I and-I options are as follows: -I: The content in standard output before the pipeline can be replaced directly with {} -I: Need to pre-refer to the replacement character Th

table space under Linuxis to create a new account on the existing DB instance and access some new tablesThe procedure is as follows:(1) Log in to Linux, log in as an Oracle user (if the root user is logged in, switch to Oracle using the su-oracle command after logging in)(2) to open Sqlplus in SYSDBA mode, the command is as follows: Sqlplus "/as sysdba"(3) View our general placement of user table spaces: Execute the following sql:Select name from V$d

Now many servers are equipped with raid, general software RAID or motherboard comes with raid is not software-assisted, you can understand the basic RAID through the system commands, of course, the best use of hardware RAID cards, usually with the hard drive status details. This article mainly introduces the use of Linux with the command to view the basic RAID i

metadata to reflect the simple URL changes. When the root URL of the warehouse changes(such as scheme name or host name change), but the working copy is still used when mapping to the same directory in the same warehouseThis command updates the correspondence between the working copy and the warehouse.17.Resolve ConflictsSVN resolved:Removes the "conflicting" status of the working Copy's directory or file.Usage: Resolved PATH ...Note: The book command does not resolve the conflict by syntax or

Tags: adjust load. gz different CAL host defaults let tar? ? After compressing files to improve data transmission efficiency, reduce transmission bandwidth, management of backup data has a very important function, so file compression decompression skills become the necessary skills. Compared to the file decompression tool in Windows Flowers Zhengyan, the Unzip tool in Linux is much less, the commonly used decompression commands are gzip,bzip2,tar,zip

"Please input your name:" firstName secondName lastNamethen echo "variable is $firstName - $secondName - $lastName"else echo -e "\ntimeout\n"fi[[emailprotected] test]# bash read.shPlease input your name:timeout4. Read content from the specified file[[emailprotected] test]# cat-n test.txt 1 This is Test text. 2 this was second line. 3 Hello World 4 C # Main 5 python# using the-u option [[emailprotected] test]# cat readtest.sh#!/bin/bashexec 5This article is posted on the subscription num

What is tcpdump? ? Enter the command in Linux the definition given by man tcpdump is as follows:tcpdump - 转储网络上的数据流Does it feel like a rip? We use the popular, the image, the academic expression way to describe tcpdump comprehensively: In layman's terms, tcpdump is a grab bag tool for crawling packets that are transmitted over the network The image of the tcpdump, like the national Customs, all the entry and exit of the goods, customs hav

header is also added to the natural front. 0089: The source port is 0x0089, i.e.: 137 0089: The destination port is 0x0089 i.e.: 137 The total length of the 003A:UDP package, which is 58 bytes, removes the 8 bytes from the header, and only 50 bytes are really available for transmission. The 1277:UDP checksum. To 0x1277 This article is posted on the subscription number, such as your friends like my article, you can also follow my subscription number: Woaitest, or scan t

Basic Application Tutorial of Iptables firewall on Linux1. Install iptables firewall If you do not install iptables , you need to install it first CentOS execution: Yum Install IptablesDebian/ubuntu Execution:Apt-get Install Iptables2. Clear existing iptables rulesIptables-fIptables-xIptables–z3, open the specified portThe-a and -I parameters are added to the end of the rule and to the front of the rule, r

Iptables is commonly used on Linux firewall software, the following to everyone to say iptables installation, clear iptables rules, iptables only open the designated port, iptables shield designated IP, IP segment and unblock, Remove basic applications such as iptables that have been added iptables rules.1. Install iptables FirewallIf no installation of iptables is required first,CentOS executes:Yum Install

We're working on Linux to tell the file which owner it belongs to and which group it is. So we need to know how to set up ":Set the file owner, groupChown:change owner>chown Master filename>chown. Group filename>chown, master. Group filename>chown-r Master. Group filename//Recursive settings file owner and groupGT;CHMOD-R 777 filename//Recursively set permissions information for a folderThe operation is not very easy.

Iptables is a common firewall software in Linux, the following describes how to install and clear iptables rules. iptables only opens the specified port, and iptables shields specified ip addresses, ip segments, unblocking, and deleting added iptables rules. basic Application. 1. Install iptables FirewallIf iptables is not installed, install it first, and run CentOS:Yum install iptablesRun Debian/Ubuntu:Apt