Linux

Enter Guestos:#/sbin/ifconfigView Inet addr:10.0.2.15Then go to Hostos, look at the control Panel, look at the network and Sharing center of VirtualBox Host-onlyIP address of the IPv4 property: 192.168.56.1Ready enough, the following decisive

Common special characters^ point to the beginning of a line$ points to the end of a line. Any single character[] enclose a character range in parentheses, where any one of the characters can be matched, such as the character range a~e, or preceded

1, by the purpose of a single small program composition: The combination of small procedures to complete complex tasks;2. All documents:3, try to avoid capturing the user interface: Do not interact with the user,4, the configuration file is saved in

Linux boot process:Previously: The Vmlinuz kernel was initially initialized, the INIT process was mounted to mount the root file system, and the INIT process was on the root filesystem, which created a contradiction. So on the design of the INIT

After playing for so many years, almost rarely record their own solutions, because the total feeling that those problems for the master, are a side dish, so because of face, embarrassed to write!Later to understand, write down, can help the novice,

1. What the module meansLinux is built in a modular way, allowing the kernel to dynamically insert or remove code from it at runtime, which is combined with the package extension function, data, module entry function, and module Exit function.In a

A hard link records the inode of the target, and the soft link records the path to the destination. Soft links are like shortcuts, and soft links are like backups. Soft links can do cross-partition links, and hard links because of the inode, can

The Find command is a command to search for a file, his syntax format: find [path] [options] [tests] [actions]1. The path section is the route you specify, which can be an absolute path, such as/usr/bin, or a relative path, such as. 。 If required,

Method 1 : Cut[Email protected] oldboy]# ifconfig eth0|grep ' inet addr ' |cut-d ': "-f2|cut-d" "-f110.0.0.162Method 2 : awk[[email protected] oldboy]# ifconfig eth0|grep ' inet addr ' |awk-f ': ' {print $} ' |awk ' {print $} '10.0.0.162Description:

First, download Apache's installation package from Apache official websiteDownload Apr and Apr-util installation package, extract to Apache's Srclib directory, Apache from 2.4? Start stripping the two modulesGo to Apache Extract

Questions Guide:1. What if I get a hadoop src maven package?2. What software is required to compile Hadoop?3. How do I compile hadoop2.4?Extended:Why is compiling Hadoop installing these software?This article linksHttp://www.aboutyun.com/thread-8130-

Install the Redhat Linux root password in your VM virtual machine forget it, just started to reinstall, but later thought that there is a single mode of Linux, the use of one can directly enter the character interface, and then modify; Start the

In fact, "aliases" are used in a variety of situations. For example, "command alias, email address alias" and so on.Therefore, when said "alias" alone, according to the occasion, the representative of the meaning is not the same.In general, "aliases"

Rman backup script #! /Bin/bash Su-oracle Rman target/ Backup as compressed backupset database Include current controlfile format '/orabak/db _ % d _ % T _ % s' Plus archivelog format'/orabak/arch _ % d _ % T _ % s' delete allinput; Delete

I believe that you love programming and technology. You must have been familiar with or even love linux, and may even be very familiar with linux. But what do you know about linux. This article! Pure entertainment! Don't like it, don't spray it! 1.

The first is to build the background service: Download the following 2 software packages extmail-1.2.tar.gz Extman-1.1.tar.gz Create an extsuite directory. The fixed format is mkdir/var/www/extsuite. Decompress the two packages to

Echo $ (cat the file you need)>./target file Use cat to get the content of the file you want, and then use echo to write data. The problem is that the \ n obtained by cat may be invalid. If it is simply used as the ACM input test data, there is

Upgrade Linux Kernel Directly on a device with a compilation environment, it is easy to compile and upgrade the kernel. Make menuconfig Or Copy the. config file of the existing system Modify the. config file CONFIG_DEBUG_INFO = n (avoid generating

Each operating system has its function of automatically starting the program at a scheduled time. Windows has its task plan, while Linux has its function of crontab.Crontab Introduction Crontab commands are common in Unix and Unix-like operating

When you use the vi command on linux to modify the content of a file, you find that the file cannot be saved. Each time you finish writing the file, use ": q !" Command can exit normally but use ": wq! "When saving the file and exiting the command,