Linux

Go to the Bin directory to run Emctl start Dbconsole[email protected]:~> Sqlplus/nologSql*plus:release 9.2.0.4.0-production on Fri Jan 20 02:29:37 2006Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.Sql> Connect/as SYSDBAConnected

Basic structure number of magnetic paths , sectors , cylinders and heads The most basic part of the hard disk is made of hard metal materials coated with magnetic media, the number of different disk sizes. Each platter has two sides and can

Speaking of virtual machines, everyone is not unfamiliar. There are many scenarios in which virtual machines need to be used, such as a comrade who is interested in writing an operating system, often requiring a virtual machine to run and debug his

Vim/root/.bash_profileIn the path= $PATH: $HOME/bin followed by a path, such as path= $PATH: $HOME/bin:/usr/local/bin/After exiting login again, use env | More see if add on (Multiple paths separated by:)This is for the root user, each user has a

mkdir workspace/softwarecd workspace/softwarerz====================================================== Configure jdk:tar-xzvf jdk-7u71-linux-x64.tar.gzrm-f jdk-7u71-linux-x64.tar.gz Test: java-version=============== ===================================

1. If the old git in the system skips the first step, install it firstsudo Install Git-core2. Download the latest git$ git clone git://3. Go to the Git directory and view the latest version$ cd git$ git tagThe current latest version is4, the latest

Fundamentals of the ten-year OPS series-LinuxZeng LinContact: [Email protected]Website: www.jplatformx.comCopyright: Please do not reprint the article without permission First, IntroductionTo understand the type command, you first need to know

Installation under CentOS:Yum Install Vixie-cronyum Install crontabTo detect if the Crontabs is installed:Crontab-lTo detect if the Crontabs service is started:Service Crond StatusCrontabs Common CommandsCrontab–u//Set a cron service for a user,

4 steps for Linux to interrupt processing:1. When the interrupt is generated, jump to the unified entrance Irq_svc2. Get the interrupt number3. Find the IRQ_DESC structure according to the interrupt number4. Remove the pre-registered interrupt

What does the Unix kernel do to determine the access rights of a process to a resource? is the (valid) ID of the running user for this process, including the user ID and the group ID. The user can use the ID command to find the user ID and

Variable Assignment Myname=vbird 2. The variable shows echo $myname3. Special characters in double quotation mark keep the original characteristic: var= "Lang is $LANG", get var to Lang is en_US4. Special characters in single quotation marks are

Start-up process basically for the motherboard to find the hard disk, hard disk through the MBR to find the kernel, the kernel to see what the hardware in the environment to start, and then execute the startup script of each program, and finally

OneThe Linux kernel list is a two-way loop linked list, similar to the linked list in the data structure, no longer detailed. Because the functions implemented in the kernel are classic, porting them is convenient for use in later applications./*****

when we use Linux to create a new user, if the password is not set, then the password is an unknown, it is not a blank password, we can use passwd to modify the discovery no matter what we input or nothing input, do not work, there is this user can

Write in front: If only to study HTK, it is recommended that Linux use 32-bit, can save a lot of trouble, 64-bit to date there is no solution to the error exists.Please refer to this blog for specific procedures:Http://blog.sina.com.cn/s/blog_87862d6

What is a rootkit?A series of malicious programs that hide their own, often rewrite the LS, PS, find, kill and other system commands to escape detection.Tools for detecting rootkitsChkrootkit and RkhunterHow do I check the most recently logged in

SED Line processing tool1. Display matching lines in the file cat tmp.txt|sed-n '/Match word regular/P ' (-n is not printing all files) 2, display the first few lines of the file cat tmp.txt|sed-n ' 1p '--first line-- cat tmp.txt|sed-n ' 1,3

Linux startup Process1 , BIOS ( basicin out System )Power-On check the hardware, and then load the first available boot item MBR ;#可通过BIOS设置各种介质存储设备的启动顺序, such as: CDROM, disk, USB2 mbr ( main bootrecorder ) Disk's first sector, total bytes,

Analysis of inode and inode in Linux To say inode, we have to start with the physical format of the hard disk. The minimum storage unit of the hard disk is sector, that is, sector. Each sector stores 512 bytes. Generally, a file system has its own

Slow SSH connection in CentOS/Linux Currently, SSH remote connection is generally used to connect to a linux server. I recently installed a new server and found that telnet is fast, ping is normal, but SSH connection is slow. There are several