Linux

Next, we discuss the use of the alias (alias) on SQL.There are two types of aliases that you use most often: field aliases and table aliases.In a nutshell. The purpose of the field aliases is to make the results of SQL generation easy to read. In

Reprint the original source of the articleIn the absence of nagios monitoring, as long as the server can be on the Internet, you can send e-mail to remind administrators of the use of system resources.First, write the Linux system warning mail

According to Brother Bird's ping script, I changed it a bit. Used knowledge: Read, Linux read by line, shell output effect adjustment, etc.Where Linux reads files by line is more important, you can see the link1 Scripting Features:Bulk Ping the IP

Loader to do two things, let's start with the first item, load the kernel into memory:1. Load the kernel into memory.2. Jump into protected mode.When you first compile a no-kernel:NASM Boot.asm-o Boot.binNASM Loader.asm-o Loader.binDD if=boot.bin of=

Linux kernel version: linux-3.0.35Development Board: I. Mx6s my-imx6-ek200System: UBUNTU12Preface: Before writing a blog about how to read the system time through the application layer program, write a blog about how to write and save the RTC clock

Location and special variables for bash programming under Linux (iv)1.bash Position Variable:$, $, ... The 1th parameter, the second argument, ...Shift poll substitution, cullingExample: Using a script to interpret the meaning of positional

What is Ipmitool:Baidu Encyclopedia to explain already enough, simply said is "IPMI (Intelligent Platform Management Interface) that Intelligent Platform Management interface is to make hardware management with" intelligent "new generation of common

Experimental principle:I. Timing of dispatchDifferent types of processes have different scheduling requirements the first category:       i/o-bound             frequent i/o            usually spends a lot of time waiting for I/O operations to

The 4th chapter of the process scheduling more than 4.1 tasksMulti-tasking system can be divided into: non-preemptive multi-task and preemptive multi-task.Linux provides preemptive multi-tasking mode. In preemptive multitasking mode,

Time synchronization in a cluster can cause big data applications to run into confusion, causing unpredictable problems, such as HBase, which hangs when time differences are too large, so in a big data cluster, the NTP service should serve as a

This article is intended to provide the most basic, can be used in the production environment of Hadoop, HDFS distributed environment of the building, Self is a summary and collation, but also to facilitate the new learning to use.Installation and

Tuning system performance using SAR in LinuxKeywords: SARThe SAR default is not installed under Linux, we need to install manually, it is generally recommended source mode installation, download similar sysstat-6.1.3.tar.gzYou can then use the

2015108 Li ZeyuanHow the Linux kernel loads and launches an executable program Understand the process of compiling links and the Elf executable format, and refer to the first section of this week for more information; Programming uses

1. Add the Official Software library1) Edit/etc/apt/sources.listLeafpad/etc/apt/sources.list2) Use # to comment out the original content and add the following:# Regular Repositoriesdeb http: // Http.kali.org/kali Sana main non-free contribdeb http://

Emmet: Quick compilation of HTML/CSS code artifacts The predecessor of Emmet is the famous Zen coding. If you are engaged in Web Front-end development, you will not be unfamiliar with this plug-in. It uses the syntax similar to the CSS selector to

Ubuntu kernel compilation tutorial-compile the Linux4.5.0 Kernel Tutorial environment: Ubnuntu 64-bit (14.04 recommended) + Xshell The Linux ECs is very useful for compiling the kernel. This article describes the most basic kernel compilation

[Switch] how to enable the Ubuntu sleep mode We all know that Windows has a sleep mode, and Ubuntu does. In the sleep mode, all the content in the memory can be written to the hard disk when the user leaves temporarily. When the user starts the

How to Use the ssh client CRT to connect to linuxSet simulation and rollback BufferFont appearance settingsLog File SettingsSsh client implementation and linux shared file linux installation support software Yum install lrzsz-y # install and

In CentOS 7, the Tomcat 8 service is started in daemon mode. If you have no time in the past few days, set the configuration in CentOS 7 to start the Tomcat 8 service in daemon mode. 1. JDK Installation 1) check whether the server is pre-installed

Install and configure the NFS server in Ubuntu 14.04 (1) install the NFS server1.1-install the Ubuntu nfs server: Sudo apt-get install nfs-kernel-server 1.2-install the nfs client: Sudo apt-get install nfs-common (Nfs-commom is also installed when