Linux

primary KEY (Primary key) each of the data in the table is a unique value in the form. In other words, it is a unique way to identify each row of data in a table. The primary key can be a field in the original data, or a man-made field (a field that

20 commands that are useful to intermediate Linux users1. Command: FindSearches for files under the specified directory, starting at the parent directory, and then searching subdirectories. Note: The-name ' option is search case sensitive. You can

Du: Querying disk usage space for a file or folderIf you have a lot of files and folders under the current directory, you can cycle through the space used by all files and folders using the command without the parameter Du. This is not good to see

This article covers installation process for Aeroo reporting engine on Linux servers. If you find the article useful or want to add some information related to this topic, please feel free to express your op Inion on Aeroo Reports & OpenOffice.org

Recently the project has been using Linux, which involves the Linux LVM, originally wanted to write an article about LVM, searched, found a better, reproduced, but also thank the author GaojunOriginal Linux LVM HDD management and LVM expansionLVM

1. The benefits of the Shared libraryA shared library, also known as a dynamic library or so file, can be called when the executable file is started or when the process runs. There are many benefits to using shared libraries, such as (including but

System V shared memory is similar to POSIX shared memory, and System V shared memory is called the Shmget function and the Shamat function.The Shmget function creates a shared memory area, or accesses an existing memory area, similar to the system

Linux Tuning system time zone:Locate the appropriate time zone file/usr/share/zoneinfo/asia/shanghaiReplace the current/etc/localtime file with this fileIt's time for a date to be CST.If not, change the value of the TZ environment variable.Many

If you need to copy a file from a second hard disk, which is formatted as a UFS 2 file system, how do I mount a ufs 2 file system created by FreeBSD onto the Ubuntu system?UFS file systems are widely used in different operating systems (for example:

The following is the specific steps of their own, copyright small von All.First, prepare the BT5 ISO image file in advance. and virtual machines, install the virtual machine in advance, and then install the BT5.Second, enter the page, click Statx,

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First step: Create a new virtual machineStep two: Select "Typical" InstallationStep three: Select Image file Installation-Browse to select ISO fileFourth step: Choose to install the operating system laterFifth step: System select Linux, version

Help for common linux commands and help for common linux commands Command name: man Purpose: help information of commands and configuration files (no absolute path is required) Mainly view the name and search parameters There are several types

Data Packet Classification and scheduling-another explanation of Linux TC-linuxtcIf you understand the Linux TC framework from the perspective of layered recursion, it is easy to classify queues into class queues and class-free queues. In this

LD_LIBRARY_PATH and ld. so. conf, ld_library_path I have previously written an article about the relationship between LD_LIBRARY_PATH and gcc/g ++-L, so I used CPACK to create a Debian installation package, and then on/home /. in bashrc, export

X01. OS. 13: file system, x01. OS. 13 File System After two days of power stop, I suddenly had to be idle. Finding a broken guitar is no longer a string. Ding ding Dangdang knocked on the power. To pick up time, stay up late for three or four

BASH command and usage summary, bash usage Summary I need to write a Linux script in my recent work and use a lot of BASH commands. To avoid forgetting it later, I will write them down here one by one. It may be messy. Just take a look. If something

Create an SSH Key to connect to GitHub or GitLab When we clone a project from GitHub or GitLab or participate in a project, we need to prove our identity. One possible solution is to add the account name and password to each access, and save a

Linux inter-process communication-famous pipelines (FIFO) and linuxfifoFamous pipe (FIFO) Named Pipes are also called FIFO files, which are special files. Since all linux objects can be regarded as files, the use of Named Pipes becomes very

Shell BASICS (10) including shell scripts and shell Basics Preface   Write it here; the basics of shell are almost finished. I hope you have a basic understanding of shell. You may be eager to try it out and want to write some program exercises.