ldi acronym

As we all know, because of the stability of Linux, usually as a server system, to be called a master of PHP, Linux is a compulsory lesson. So what happens in the middle of the Linux system from boot to boot? This article will briefly discuss the mysterious process in the middle.1, the BIOS power-on self-testThe BIOS is an acronym for the English "Basic Input Output System" In fact, it is a set of programs that solidify onto a ROM chip on the motherboa

fileIt is known that the system started SELinux, the system logs are reviewed, and two tools are available to collect the SELinux generatedLog, one is Setroubleshoot, one is audit, first Use audit tool, use methodAs follows:Audit related commands are available in the system, often with logs generated by audit2why and Audit2allow,auditPut in/var/log/audit, because this file record information is not suitable for direct viewing, you can use audit2whycommand, start audit firstWhen the client logs

=" 361 "title=" clip_image002[4] "style=" border:0px;padding-top:0px;padding-right:0px; Padding-left:0px;background-image:none; "alt=" clip_image002[4] "src=" http://s3.51cto.com/wyfs02/M02/6C/40/ Wkiol1vc-aty8mlwaacndxnjm0g123.jpg "border=" 0 "/>GNS3 ConceptGNS3 is the acronym for the Graphical Network Simulator (graphical Web simulator), which is a three-tier graphical network emulator that can run on multiple platforms (including Windows, Linux, an

steps. Several common shells mentioned above, the shell is a scripting language, then there must be an interpreter to execute these scripts. The common shell scripting interpreters on Unix/linux include bash, sh, csh, Ksh, and so on, which are used to call them a shell. We often say that there are many kinds of shells, actually speaking of shell script interpreter. BashBash is the default shell of the Linux standard,This tutorial is also based on bash. The bash was completed by Brian Fox and Ch

compatibility issues with 64-bit Ubuntu than Windows, but some proprietary software such as Adobe Flash Player 64 Bit Linux support is still not perfect, so we recommend that you download the 32-bit version. After setting up, click the Download button to start the download, Ubuntu website will automatically look for you closer to the server to provide download.3. Select the Installation methodUbuntu has two ways of installing Ubuntu into a Windows partition, the so-called Wubi installation

CSV is an acronym for comma-delimited files (Comma separated Values), a plain text format for storing data, typically used in spreadsheets or database software. In a CSV file, the data column is separated by commas, allowing the program to recreate the correct column structure for the data by reading the file, and start a new column each time a comma is encountered. Such as:1, Zhang San, male 2, John Doe, male 3, Little red, female1. CSV Import/Export

1 , featuresCMS collectors are JAVA one of the garbage collectors in a virtual machine. It runs in the old age of the JAVA virtual machine. CMS is the acronym (Concurrent marksweep). the CMS Collector is a collector with the goal of obtaining the shortest recovery pause time. More suitable for the Internet and other occasions, may be the most important collector mode in the Internet;2 , Advantagesbecause the collector thread can work with the user t

and execute the associated program;assigns a new value to the shell variable;perform command substitution;handles I/O redirection and piping functions;provides an explanatory programming language interface, including statements such as tests, branches, and loops. BASH is the acronym for the borne again shell, which is a shell, and the default on Linux is bash. When you enter a bash command on the command line, it is equivalent to entering a bash envi

and used. ├──selinux├──srv #站点的具体 data , provided by the system. ├──SYS├──TMP #The directory where the files are temporarily stored by the general user or the program being executed, accessible to anyone, important data cannot be placed in this directory├──USR #Application storage directory,/usr/bin store application,/usr/share Store shared data,/usr/lib storage can not be directly run, but many programs are required to run a number of function library files.| /usr/local: Storage software upgra

As you know, GRUB 2 is the default boot loader for most Linux operating systems. GRUB is the acronym for GRand Unified Bootloader, which is the first program to be loaded when Linux starts, and then it is responsible for loading and giving control to the Linux kernel, which is the responsibility of the Linux kernel to initialize the rest of the operating system. In this article, we will describe the important configuration of the Ubuntu 16.04 LTS Desk

1. The relationship between GNU, Linux andgnu/linuxThe GNU project was founded in 1984 to develop a complete operating system that is Unix-like and free software: the GNU system. ( GNU can also be viewed as a free software organization )The GNU name is the recursive acronym for "GNU's not Unix". It is pronounced with no vowels between g-noo,g and N, so there is only one syllable.The GNU kernel is not yet complete, so GNU uses Linux as its kernel. (Lin

ifconfig------View IP Address mkdir command. MKDIR is the acronym for Make directory: Create directory　　Ls-f | grep '/$ 'Using the Linux Pipeline command, grep finds '/$ ' with/to the end, which is also the directoryThe grep full name is global Regular expression Print, which represents the globally regular expression version, and its use rights are for all users.| : Pipe BreakUsing the pipe symbol "|" provided by Linux Separates the two commands

/run:Program or service startup, its pid is stored in the directory. It is recommended to separate partitions to set large disk space------------------------------------------/dev:CatalogueDEV is the acronym for Devices. /dev This directory is important to all users. Because this directory contains all the external devices used in the Linux system. But here is not the driver for the external device, this andWindows,dos operating system is not the same

directory as the root directory./bootIn this directory is stored in the system to be used to start the program. When we use Lilo to boot Linux, we use some of the information here./devDEV is the acronym for Devices. This directory is important to all users. Because this directory contains all the external devices used in the Linux system. But this is not the driver for the external device. This is not the same as our usual Windows, DOS operating syst

About LVSLVS IntroductionLVS is the acronym for Linux Virtual Server, which means that a virtual servers cluster system, which belongs to the 4-tier load balancerThe relationship between Ipvs and IpvsadmWhen we use the configuration LVs, we can not directly configure the kernel Ipvs, need to use Ipvs management tool IPVSADM for managementLVS TerminologyLVS Forwarding PrincipleThe LVS load balancer accepts all inbound requests and determines which real

Kenneth Almquist, a small shell that occupies the least system resources in Linux, and it contains only 24 internal commands, making it inconvenient to use. CshCSH is a Linux-based kernel that consists of 47 authors, represented by William Joy, and has 52 internal commands. The shell is actually a shell that points to/bin/tcsh, which means that csh is actually tcsh. Ksh Ksh is an abbreviation for the Korn shell, written by Eric Gisin, with a total of 42 internal commands. The biggest advantage

directory where the mail is stored,/var/run:Program or service startup, its pid is stored in the directory. It is recommended to separate partitions to set large disk space------------------------------------------/dev:CatalogueDEV is the acronym for Devices. /dev This directory is important to all users. Because this directory contains all the external devices used in the Linux system. But here is not the driver for the external device, this andWind

well in the bin.TtyIn Linux, TTY may be the most confusing term to have a connection to a terminal. TTY is an old acronym for Teletype. Teletypes, or teletypewriters, originally refers to a telex typewriter, is a serial line with a printer keyboard by reading and sending messages, and the old Telegraph difference is not very large. Then, when the computer can only run in batch mode (when the punch card reader is the only way to get the program to run

, modifying) of the relation between entities and entities requires only one operator . 3.HQLHQL is the acronym for Hibernate Query Language, providing richer, more flexible, and more powerful query capabilities, HQL closer to the SQL statement query syntax. The criteria query encapsulates the query criteria in an object-oriented manner, but HQL (Hibernate query Language) queries provide richer and more flexible query features. As a result, Hiber

", $str);$str =str_replace ("rename", "Rename", $str);$STR =str_replace ("Alter", "Alter", $STR);$str =str_replace ("cas", "cast", $STR);$str =str_replace ("", "", $STR);$str =str_replace (">", ">", $str);$str =str_replace ("$str =str_replace ("", Chr (), $STR);$str =str_replace ("" ", Chr (9), $STR);$str =str_replace ("" ", Chr (9), $STR);$str =str_replace ("", Chr (), $STR);$str =str_replace ("'", Chr (), $STR);$str =str_replace ("$str =str_replace ("" "," "", $str);$str =str_replace ("CSS", "