Sudo Command Without Password

If a computer needs to be managed by several people at the same time, it's best not to use the root account. Because if everyone uses the same permissions, it's hard to determine who is and where and what. sudo commands are used to solve this problem. The sudo command allows users defined in the/etc/sudoers configuration file to have temporary permissions to run commands that they cannot run under normal file access permissions. These commands can be either root or other users defined in the/etc/sudoers configuration file ...

ubuntu16.04server install dockerCE. Docker is an application that makes it simple and easy to run applications in containers, just like virtual machines, which are only more portable, more resource-friendly, and more dependent on the host operating system. To learn more about the different components of a Docker container, see Docker Ecosystem: An Introduction to Common Components. There are two ways to install Docker on Ubuntu 16.04. One way is to install it on an existing operating system installation. Another way is to use one ...

In Linux (and normal Unix), the name of the superuser is called Root. Windows corresponding to the root account is the Administrator. Super users can do anything, so the superuser becomes dangerous in their daily work. You can enter a wrong command to destroy the entire system. Theoretically, the user you run should have just the right to the task at hand. In some cases, it requires root, but most of the events are normal users. Ubunt ...

First, the hardware environment Hadoop build system environment: A Linux ubuntu-13.04-desktop-i386 system, both do namenode, and do datanode. (Ubuntu system built on the hardware virtual machine) Hadoop installation target version: Hadoop1.2.1 JDK installation version: jdk-7u40-linux-i586 Pig installation version: pig-0.11.1 Hardware virtual machine Erection Environment: IBM Tower ...

The Linux command line attracts most Linux enthusiasts. A normal Linux user typically has about 50-60 commands to handle daily tasks. Linux commands and their transformations are the most valuable treasures for Linux users, Shell scripting programmers, and administrators.　　Few Linux commands are known, but they are handy and useful, whether you're a novice or an advanced user. Little people know about Linux commands the purpose of this article is to introduce some of the less-known Linux commands that are sure to efficiently ...

What we want to does in this short tutorial, I'll describe the required tournaments for setting up a single-node Hadoop using the Hadoop distributed File System (HDFS) on Ubuntu Linux. Are lo ...

Drupal is a powerful content management system (CMS) running on lamp. It can build blogs, forums, etc. without any additional modules. It also has a large number of modules that can give your site additional features such as ads, chat boxes, E-commerce, various multimedia tools, instant messaging, customer relationship management, friendly print pages, webcam, and so on. Follow the instructions below to install Drupal in the Ubuntu 6.06 (Dapper Drake). Installing the old version of Drupal is still in the source, but it's not ...

The PURE-FTPD is a free (BSD), secure, high-quality and compliant FTP server. Focus on operational efficiency and ease of use. It provides a simple answer, he meets the popular needs, including ordinary users and host suppliers. PURE-FTPD is fully supported, it is always in the concept of security design, its code is always as a loophole to discuss and review. This service can be adapted to strict security needs to do separation of permissions. Even if you do not need root permission to pass the Chroo ...

In the work life, some problems are very simple, but often search for half a day can not find the required answers, in the learning and use of Hadoop is the same.  Here are some common problems with the Hadoop cluster settings: 3 models that 1.Hadoop clusters can run?  Single-machine (local) mode pseudo-distributed mode 2. Attention points in stand-alone (local) mode? There is no daemon in stand-alone mode (standalone), ...

In the work life, some problems are very simple, but often search for half a day can not find the required answers, in the learning and use of Hadoop is the same. 　　Here are some common problems with the Hadoop cluster settings: 3 models that 1.Hadoop clusters can run?  Single-machine (local) mode pseudo-distributed mode 2. 　　Attention points in stand-alone (local) mode? In stand-alone mode (standalone) ...