nasm linux tutorial

Linux SQL statement concise tutorial --- HAVING, concise tutorial --- having How can we set conditions for the values produced by functions? For example, we may only need to know which stores have a turnover of more than $1,500. In this case, we cannot useWHERE. What should we do? Fortunately, SQL providesHAVINGAnd we can use this command to achieve this goal.HAV

Simple tutorial for SQL statements in linux --- CREATE TABLE, simple tutorial --- create A table is the basic architecture for storing data in a database. In most cases, the database vendor cannot know how to store your data. Therefore, you usually need to create tables in the database. Although many database tools allow you to create tables without using SQL, si

SQL statement concise tutorial for linux --- DISTINCT, concise tutorial --- distinct SELECTThe command allows us to read all the data in one or more columns of a table. This will capture all the data, regardless of whether the data value is repeated or not. In data processing, we often encounter different data values in the table. In other words, we nee

A concise tutorial on SQL statements in linux --- UNION ALL, a concise tutorial --- union UNION ALLThe purpose of this command is to combine the results of two SQL statements.UNION ALLAndUNIONThe difference is thatUNION ALLEach qualified item is listed, regardless of whether the item value is repeated. UNION ALLSyntax: [SQL statement 1]UNION ALL[SQL statement 2];

Linux User and user group management tutorial, linux User Group1. etc/passwd, etc/group, and etc/shadow Two important files in linux. If the two files are not found or damaged, they cannot be logged on to the linux system. Etc/passwd this file is divided into seven fields, t

, you can use the Shred command to implement,shred is a part of the coreutils , so Linux basically will have this command.　　Shred How to delete files completely :The code is as follows　　$ shred-u File　　Shred will overwrite the node and data block where the file resides with some random content, and delete the file (-u parameter ).If you want to clear a bit more thoroughly you can add the- z parameter, which means to fill with random data, and then fil

. Start the terminal40. Enter the pathwatermark/2/text/ahr0cdovl2jsb2cuy3nkbi5uzxqvaxrjyxn0y3bw/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/ Dissolve/70/gravity/southeast "/>41. Compile and run42. Write a C + + code 1,CC43. Print statements, C + +44. Print out the results45. Drive HelloWorld#include #include Module_license ("Dual BSD/GPL");//Follow the Linux protocolstatic int hello_init (void){PRINTK (Kern_alert "Hello, world\n");//Print driver info

all the files in the folder and its directory.Now, suppose you have a folder test with some scripts, all of which (including the TEST folder) have permission-rwxrwxr-x. If you want to remove the Write permission from the user group, you can run the command:Chmod-r g-w TESTRun the command ls-l, and you can see that the permission information for the TEST folder listed is drwxr-xr-x. The user group is removed from the Write permission (as is the case with all files in its directory).SummarizeYou

function, if you are interested, you can study . then next This step is to configure the network card information, you can now customize the network cardipdhcp Get, you can also point manually Customize a host name, such as mail.example.com. linuxlocalhost.localdomain Next, choose the time zone, here of course choose our time zone asia/chongqing If there is no Chongqing then choose Asia/shanghai. Continue to the nextDefine a root password here and proceed to the next step. Here we choose the

0909 operating system tutorial understanding and understanding, linux operating system tutorial Questions: 1. What does the operating system do? 2. Why do I learn the operating system? 3. How to learn the operating system? 4. Understand the operating system development history. Answer: 1st.The operating system is the

Linux RabbitMQ installation tutorial, linuxrabbitmq tutorial Install Erlang: cd/data/cloud/erlang/wget https://packages.erlang-solutions.com/erlang-solutions-1.0-1.noarch.rpmrpm-Uvh erlang-solutions-1.0-1.noarch.rpmrpm -- import https://packages.erlang-solutions.com/rpm/erlang_solutions.ascsudo yum install erlang install RabbitMQ: cd/data/cloud/rabbitmq/# upload

Linux zookeeper installation tutorial, linuxzookeeper tutorial First install jdk Then download Because zookeeper is elected in half, an odd number of nodes are usually installed. The machine list is as follows: 192.168.33.11 192.168.33.12 192.168.33.13 1. Decompress tar-zxvf zookeeper-3.4.5.tar.gz Mvzookeeper-3.4.5 ../zookeeper 2. modify configuration Cp/zookeepe

Before reading, please take 30 seconds to view the preface (in the first and second chapters) UNIX Linux University tutorial-Chapter 1 and II study notes about UNIX what is Linux? What is UNIXUNIX Linux University tutorial-Chapter 3 and Chapter 4 Study Notes UNIX connect

Linux system Tutorial: how to install software in Linux I. parse the Linux application installation packageGenerally, there are three installation packages for Linux application software:1) tarpackages, such as software-1.2.3-1.tar.gz. It is packaged using tar, a packaging t

Linux getting started Tutorial: how to check the last restart time of the Linux System Q: Is there a command to quickly check how long the system has been running? That is, how do I know the last restart time of the Linux system? There are many ways to query the last restart time. Method 1 The first method is to us

folder test with some scripts, all of which (including the TEST folder) have permission-rwxrwxr-x. If you want to remove the Write permission from the user group, you can run the command:Chmod-r g-w TESTRun the command ls-l, and you can see that the permission information for the TEST folder listed is drwxr-xr-x. The user group is removed from the Write permission (as is the case with all files in its directory).SummarizeYou should now have an in-depth understanding of the basic

Linux installation and configuration tutorial, linuxnginx tutorialInstallation and configuration of nginx in Linux Worker_processes 4; error_log/data/logs/nginx/error. log; # pid logs/nginx. pid; worker_rlimit_nofile 51200; events {use epoll; worker_connections 51200;} http {include mime. types; default_type application/octet-stream; include proxy. conf; sendfile

Linux disk formatting tutorial, how to query the partition format ?, Linux partition Linux supports many partition formats. How can I query them? You can use mkfs. ext4/dev/sdb1 or mke2fs-t ext4/dev/sdb1. Mkfs is followed by the partition format. If the format is re-formatted, the-f parameter must be added. A

OverviewIn some common devices ssh, SCP, do not enter the password can save a lot of time.Generate keySee if there is a local key, if there is, do not generate, otherwise it will affect the previous device.Copy the code code as follows :(brother even Linux training www.lampbrother.net)　　LS ~/.ssh/id_rsa.pubDo not use Ssh-key-gen to create public keys and keys on localhostCopy the code code as follows :　　SSH-KEYGEN-T RSAReturnCopy the public key to the

To view the operation time of the history record in the Linux operating system, you can do this in the following steps:Learn Linux　　1, modify the /etc/profile file, add at the end:exporthisttimeformat= "%f%t ' WhoAmI '"　　2, or in the user directory, modify the file . bash_profile, add export histtimeformat= "%f%t ' WhoAmI '"Exit the terminal and log back in.example, check The history operation time:Copy t