superuser rights

Preface:As the Columnstore concept matures, more and more developers are embracing mongodb,hbase, a large-storage, distributed, Columnstore database. In particular, MongoDB's rapid construction, the rapid use of features, so that it gets more people's favor. I mainly through the official website description for MongoDB permissions configuration to do a test and practice.Step1: No authentication start Mongod servicemongod--port 27017--dbpath/data/db1step2: Client MONGO no password connection and

Tags: common sbin display linux permissions command/etc/images Delete permissions for ordinary usersPrevious blog We described ACL permissions for Rights management, and by setting ACL permissions, we specified a specific permission for a file for a user. In this blog we will introduce more than two commands chattr and sudo used in rights management.1. Set File System Properties: chattrchattr [+-=][Options]

First, the MongoDB command main commandshow dbs #显示数据库列表 show collections #显示当前数据库中的集合（类似关系数据库中的表）show users #显示用户use MongoDB does not have a command to create a database, but there are similar commands. For example: If you want to create a "myTest" database, run the useMyTest command, and then do something (such as db.createcollection (' user ')) so that you can create a database called "MyTest". Other commandsdb.dropDatabase() #删除当前使用数据库db.cloneDatabase("127.0.0.1") #将指定机器

As the company also has several MongoDB database, need to open a certain portion of the permission for external personnel to use, so here to record, only for the needs of friends to use.1. MongoDB Common Commands[[Emailprotected]~]#ps-ef|grepmongod[[emailprotected]~]#mongo --host=127.0.0.1--port=27017MongoDBshellversion:3.2.7connectingto: 127.0.0.1:27017/test>showdbs #显示数据库列表 >showcollections #显示当前数据库中的集合 (tables in similar relational databases) >showusers #显示用户 >use2. MongoDB Database Role Bui

Admin database, MongoDB allows a connection on the local host to have full administrative access to the database. Therefore, the first step in setting up a new MongoDB instance is to create a user administrator and a database administrator account. User admins have the ability to create user accounts in the admin and other databases. You also need to create a database administrator account that you can use as a superuser to manage other aspects of da

database roles: Readanydatabase, Readwriteanydatabase, Useradminanydatabase, dbadminanydatabase6. Super User role: RootThere are also several roles that indirectly or directly provide access to the system's Superuser (Dbowner, Useradmin, Useradminanydatabase)7. Internal role: __systemPS: You can click on the built-in role link above to view details about the permissions that each role has.· Writeconcern documentation (Official note)W options: Allowed

field, the name of the new user;PWD field, user's password;Cusomdata field, for any content, for example, can be introduced to the user's full name;Roles field, specify the user's role, you can use an empty array to set a null role for the new user;In the Roles field, you can specify built-in roles and user-defined roles.Built-in Roles (built-in role):1. Database user role: Read, readWrite;2. Database Management role: DbAdmin, Dbowner, useradmin;3. Cluster Management role: Clusteradmin, Cluster

A. DescriptionOrdinary user Hadoop use: TAR-XZVF ns2.35.tar.gz command to extract the file, the system prompts to find the file, unable to open the directory, and then thought to use the sudo command to borrow root user permissions: sudo tar-xzvf Ns2.35.tar.gzResult Tip: Username is not in thesudoers file.This incident would be reported. Two. ParsingAfter the installation of the CentOS system is complete, the default normal user is unable to use the sudo command to borrow root permissions, you n

Transfer from http://www.linux521.com/2009/system/200904/2021.htmlHttp://www.myhack58.com/Article/48/67/2011/30575.htm1. Disable Root Direct login2. To give normal user permissionsAddUserJoin the wheel group directly orIn the FreeBSD system, the default is not to allow the root user to connect directly to the server via SSH, when installing the FreeBSD system to create an additional user, should not be sure to add this user to the wheel group (if you do not join this group will not SSH), You can

= _(u'b')Sub-classBased on the sub-class implementation of different display according to permissions, in the demo project, we will implement the user can only query their own created questionnairesclass chakanWenjuan(wenjuan): class Meta: proxy=True verbose_name=_(u'统计结果') verbose_name_plural=_(u'统计结果')Xadminx, we need to set the Queryset filter#-------------------------------------------------class chakanWenjuanAdmin(object): list_display = ('name','danwei','cjUser

?Permissions for SharePoint can be chased down like this (in parentheses, purely personal fiction, for understanding only): Site collection Administrator, website collection Administrator (site collection-level permissions); Site Onwer, the website owner and the corresponding Member,visitor (site-level permissions); List/library Independent permissions (site content level permissions); Folder/item Independent permissions (Content-level permissions); For this SkyDrive Pr

group name that is the same as the user name. Command meaning useradd-d/HOME/ABC abc-m Create the ABC user, if the/HOME/ABC directory does not exist, the directory is created automatically, and the user belongs to the ABC Group useradd-d/home/a a-g test-m Create a user name called a, home directory in/home/a, if the home directory does not exist, automatically create the home directory, while the user belongs to the test

can use a small program to verify that it is true.This program prints the real user ID with the effective user ID when the program is run.#include #include IntMain (int argc, char *argv[]){Puts ("I am Child process");printf ("userid=%d,euserid=%d\n", Getuid (), Geteuid ());return 0;}At the same time, setting its permissions to ' s ' in-rwsr-xr-x is Saved-user-id, and will execute with superuser privileges when executing this program. It's easy to ver

sudo command functionWith the sudo command, we can classify certain superuser privileges into specific (fine) authorization to the specified ordinary user, and the normal user does not need to know the root password to use the obtained authorization (the administrator really allows root privileges). Therefore, it is no exaggeration to say that the sudo command, in contrast to the SU command, in the system users of decentralized management progress a l

Label: 1.MongoDB Permissions Introduction A in the previous article, we configured the MONGODB environment under Linux and set it to start with the service randomization, so the next article we will briefly talk about the management of the login user rights under MongoDB. b MongoDB Installation, the default is not required to enter the user name password can log in, but often the database we will be in security considerations and set the user name pa

(1) Su and sudoSU: Can be switched between users through Su, what is power if superuser root switches to normal or virtual users without a password? That's it! And the normal user to switch to any other users need password authentication;Sudo:Sudo's role is destined to be extra cautious in terms of security, or it could lead to illegal users grabbing root privileges. At the same time, it has to take into account the ease of use, so that the system adm

"Guide" This article describes how to use the sudo command to assign administrative privileges to Ubuntu. One of the distinctive features of Ubuntu is that you can't log in to the system as root when you first use it. This is going to start with the installation of the system. For other Linux systems, the root password is typically set during the installation process so that the user can log in to the root account or use the SU command to switch to Superuse