• Home
  • Services
    • DBA Support
    • DBA Consultancy Services
    • PostgreSQL Support
    • Website Maintenance
  • Courses

    About Courses

    • List Of Courses
    • Become an Instructor
    Greenplum Database

    Greenplum Database

    $2,000.00 $1,500.00
    Read More
  • Company
    • FAQs
    • About Us
    • Contact
  • Events
  • Portfolio
  • Blogs
    • Blog – RayaFeeL
    • Blog – PostgreSQL Support
    • Blog – PostgreSQL Migration
    • Blog – All DB’s
    • Blog – Linux
    • Blog – Medical Coding
      • Cart

        0

    Have any question?
    (+91)8838953252
    ITsupport@rayafeel.com
    RegisterLogin
    RayaFeeL
    • Home
    • Services
      • DBA Support
      • DBA Consultancy Services
      • PostgreSQL Support
      • Website Maintenance
    • Courses

      About Courses

      • List Of Courses
      • Become an Instructor
      Greenplum Database

      Greenplum Database

      $2,000.00 $1,500.00
      Read More
    • Company
      • FAQs
      • About Us
      • Contact
    • Events
    • Portfolio
    • Blogs
      • Blog – RayaFeeL
      • Blog – PostgreSQL Support
      • Blog – PostgreSQL Migration
      • Blog – All DB’s
      • Blog – Linux
      • Blog – Medical Coding
        • Cart

          0

      Databases

      • Home
      • All courses
      • Databases
      • PostgreSQL Database
      CoursesIT & SoftwareDatabasesPostgreSQL Database
      • BASIC POSTGRESQL
        6
        • Lecture1.1
          PostgreSQL Brief History 30 min
        • Lecture1.2
          PostgreSQL Features 20 min
        • Lecture1.3
          PostgreSQL Monitoring Tools Overview 30 min
        • Lecture1.4
          PostgreSQL – Oracle Vs PostgreSQL 30 min
        • Lecture1.5
          PostgreSQL Data Types 30 min
        • Lecture1.6
          PostgreSQL Maximum Objects Size 30 min
      • VMWARE & POSTGRESQL INSTALLATION
        9
        • Lecture2.1
          Vmware Installation 30 min
        • Lecture2.2
          Creating Linux Virtual Machine 01 hour
        • Lecture2.3
          PostgreSQL Installation Types 30 min
        • Lecture2.4
          PostgreSQL GUI Installation 30 min
        • Lecture2.5
          PostgreSQL Text Mode Installation 30 min
        • Lecture2.6
          PostgreSQL Unattended Mode Installation 30 min
        • Lecture2.7
          Configure the network & Disk Partition 30 min
        • Lecture2.8
          How to install PostgreSQL10 On Linux Server ? 20 min
        • Lecture2.9
          PostgreSQL -11 Installation (rpm & source code) 30 min
      • POSTGRESQL DATABASE
        6
        • Lecture3.1
          Connect Postgres Server 10 min
        • Lecture3.2
          PostgreSQL startup / shutdown /restart the postgresql server 30 min
        • Lecture3.3
          PostgreSQL .bash_profile Set Up 30 min
        • Lecture3.4
          PostgreSQL Database Creation 30 min
        • Lecture3.5
          PostgreSQL Connect Database 30 min
        • Lecture3.6
          PostgreSQL Drop Database 30 min
      • POSTGRESQL TABLE
        16
        • Lecture4.1
          PostgreSQL Languages 30 min
        • Lecture4.2
          PostgreSQL Create Table 30 min
        • Lecture4.3
          PostgreSQL Select Table 30 min
        • Lecture4.4
          PostgreSQL Alter Table 30 min
        • Lecture4.5
          PostgreSQL Drop Table 30 min
        • Lecture4.6
          PostgreSQL Truncate Table 30 min
        • Lecture4.7
          PostgreSQL Rename 30 min
        • Lecture4.8
          PostgreSQL Comment 30 min
        • Lecture4.9
          PostgreSQL Insert 30 min
        • Lecture4.10
          PostgreSQL Update 30 min
        • Lecture4.11
          PostgreSQL Table Delete 30 min
        • Lecture4.12
          PostgreSQL Merge Table 30 min
        • Lecture4.13
          PostgreSQL UNION 30 min
        • Lecture4.14
          PostgreSQL UNION ALL 30 min
        • Lecture4.15
          PostgreSQL INTERSECT 30 min
        • Lecture4.16
          PostgreSQL DISTINCT 30 min
      • USER/OBJECTS PRIVILEGE AND ROLES ASIGNING
        3
        • Lecture5.1
          PostgreSQL Grant 30 min
        • Lecture5.2
          PostgreSQL Revoke 30 min
        • Lecture5.3
          Postgres user creation and restrict DDL statement & other database access 30 min
      • TRANSACTIONS - MVCC
        3
        • Lecture6.1
          PostgreSQL Commit 30 min
        • Lecture6.2
          PostgreSQL Rollback 30 min
        • Lecture6.3
          PostgreSQL Savepoint 30 min
      • POSTGRESQL USER/SCHEMA MANAGEMENT
        9
        • Lecture7.1
          PostgreSQL User Creation 30 min
        • Lecture7.2
          PostgreSQL User Creation Using Utility 30 min
        • Lecture7.3
          PostgreSQL Drop user 30 min
        • Lecture7.4
          PostgreSQL Drop User Using Utility 30 min
        • Lecture7.5
          PostgreSQL Password Changing and Views 30 min
        • Lecture7.6
          PostgreSQL Group/role 30 min
        • Lecture7.7
          Alter PostgreSQL User/Role/group 30 min
        • Lecture7.8
          PostgreSQL Schema 30 min
        • Lecture7.9
          PostgreSQL user creation and restrict DDL & database access 30 min
      • POSTGRESQL CONSTRAINTS
        6
        • Lecture8.1
          PostgreSQL Constraints 30 min
        • Lecture8.2
          PostgreSQL Primary Key 30 min
        • Lecture8.3
          PostgreSQL UNIQUE Constraint 30 min
        • Lecture8.4
          PostgreSQL CHECK Constraint 30 min
        • Lecture8.5
          PostgreSQL NOT NULL Constraint 30 min
        • Lecture8.6
          PostgreSQL Foreign Key 30 min
      • POSTGRESQL ADVANCE DATA TYPE
        5
        • Lecture9.1
          PostgreSQL DOMAIN Data Type 30 min
        • Lecture9.2
          PostgreSQL Alter Domain 30 min
        • Lecture9.3
          PostgreSQL Drop DOMAIN 30 min
        • Lecture9.4
          PostgreSQL Json Data Type 30 min
        • Lecture9.5
          PostgreSQL Sequence 30 min
      • POSTGRESQL VIEWS
        1
        • Lecture10.1
          How to Create PostgreSQL View 30 min
      • POSTGRESQL MONITORING OBJECT USUAGE/SIZE
        1
        • Lecture11.1
          How to Get Table Size, Database Size, Indexes Size, schema Size, Tablespace Size, column Size in PostgreSQL Database 30 min
      • POSTGRESQL DATABASE ARCHITECTURE
        4
        • Lecture12.1
          PostgreSQL Tablespace 30 min
        • Lecture12.2
          PostgreSQL UnderStanding Of Objects 30 min
        • Lecture12.3
          PostgreSQL Architecture 30 min
        • Lecture12.4
          PostgreSQL Query Flow 30 min
      • POSTGRESQL BACKUP AND RECOVERY
        13
        • Lecture13.1
          PostgreSQL Backup & Recovery Overview 30 min
        • Lecture13.2
          PostgreSQL Database Backup Tools – Pg_dump 30 min
        • Lecture13.3
          PostgreSQL Database Backup Tools – Pg_dumpall 30 min
        • Lecture13.4
          PostgreSQL Database Backup Tools – Pg_basebackup 30 min
        • Lecture13.5
          PostgreSQL COPY data From Text File 30 min
        • Lecture13.6
          PostgreSQL COPY data to Text File 30 min
        • Lecture13.7
          PostgreSQL Clone Table 20 min
        • Lecture13.8
          Postgres Database Schema Migration 30 min
        • Lecture13.9
          PostgreSQL Database clone/migration 30 min
        • Lecture13.10
          PostgreSQL Compress backup format 30 min
        • Lecture13.11
          PostgreSQL Archivelog 30 min
        • Lecture13.12
          PostgreSQL Point In Time Recovery 30 min
        • Lecture13.13
          Taking Backup On Postgres Slave (Standby) Server 30 min
      • POSTGRESQL PERFORMANCE TUNING
        5
        • Lecture14.1
          PostgreSQL Index 30 min
        • Lecture14.2
          PostgreSQL Reindex 30 min
        • Lecture14.3
          PostgreSQL PerformanceTuning 30 min
        • Lecture14.4
          Understanding Postgres VACUUM | VACUUM FULL | VACUUM ANALYZE 30 min
        • Lecture14.5
          Postgres Autovacuum Configuration/Setup 30 min
      • HIGH AVAILABILITY, LOAD BALANCING, AND REPLICATION
        11
        • Lecture15.1
          POSTGRESQL STREAMING REPLICATION 30 min
        • Lecture15.2
          SSL Streaming replication with PostgreSQL 10 30 min
        • Lecture15.3
          How to make Linux partition and configure the network on Redhat Linux7.3 30 min
        • Lecture15.4
          How To Fix Firewall Issues while connecting the other server? 30 min
        • Lecture15.5
          How to install the PostgreSQL10 On Linux ? 30 min
        • Lecture15.6
          How to Configure the cascade replication On PostgreSQL 10.3 ? 30 min
        • Lecture15.7
          How to add extra one slave an existing PostgreSQL cascade replication without down time ? 30 min
        • Lecture15.8
          PostgreSQL Switchover 30 min
        • Lecture15.9
          Postgres Failover 30 min
        • Lecture15.10
          Postgres Upgrade 30 min
        • Lecture15.11
          PostgreSQL Upgrade 9.5 to 11.3 . 30 min

        PostgreSQL User Creation Using Utility

        • createuser creates a new PostgreSQL user. Only superusers (users with usesuper set in the pg_shadow table) can create new PostgreSQL users, so createuser must be invoked by someone who can connect as a PostgreSQL superuser.
        • Being a superuser also implies the ability to bypass access permission checks within the database, so superuserdom should not be granted lightly.

        SYNTAX:

        createuser [option...] [username]
        OPTION EXPLANATION
        username name of the PostgreSQL user
        -a

        –adduser

        The new user is allowed to create other users. (Note: Actually, this makes the new user a superuser. The option is poorly named.)
        -A

        –no-adduser

        The new user is not allowed to create other users (i.e., the new user is a regular user, not a superuser). This is the default.
        -d

        –createdb

        The new user is allowed to create databases.
        -D

        –no-createdb

        The new user is not allowed to create databases. This is the default.
        -e

        –echo

        Echo the commands that createuser generates and sends to the server.
        -E

        –encrypted

        Encrypts the user’s password stored in the database. If not specified, the default password behavior is used. (ENCRYPTED-means password stored as encrypted model so you can’t see actual password but  you can see some encrypted value like “md5df2c887bcb2c49b903aa33bdbc5c2984”
        -i number

        –sysid number

        Allows you to pick a non-default user ID for the new user. This is not necessary, but some people like it.
        -N

        –unencrypted

        Does not encrypt the user’s password stored in the database. If not specified, the default password behavior is used. (you can see password using PG-SHADOW VIEWS
        -P

        –pwprompt

        (caps letter P)

        If given, createuser will issue a prompt for the password of the new user. This is not necessary if you do not plan on using password authentication.
        -q

        –quiet

        Do not display a response.
        -h host

        –host host

        Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory for the Unix domain socket.
        -p port

        –port port

        Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.
        -U username

        –username username

        User name to connect as (not the user name to create).
        -W

        –password

        Force password prompt (to connect to the server, not for the password of the new user).

        WHEN you create user on command line mode The database server must be running at the targeted host

        — Creating u5 user using createuser utility

        [root@p1 bin]# cd /opt/PostgreSQL/9.3/bin/
        [root@p1 bin]# ./createuser u5
        Password: 
        
        postgres=# select usename,passwd,valuntil,usecreatedb from PG_SHADOW;
         usename  |               passwd                |        valuntil        | usecreatedb 
        ----------+-------------------------------------+------------------------+-------------
         postgres | md505ea766c2bc9e19f34b66114ace97598 |                        | t
         rep      | md5df2c887bcb2c49b903aa33bdbc5c2984 |                        | f
         u1       |                                     |                        | f
         u2       | u2                                  |                        | f
         u3       | md5dad1ef51b879799793dc38d714b97063 | 2017-06-06 00:00:00-04 | f
         nijam    |                                     |                        | f
         u4       | md54af10c3137cf79c12265e8d288070711 |                        | t
         u5       |                                     |                        | f
        (8 rows)

        — To create the  user u7 using the server on host p1, port 5432, avoiding the prompts and taking a look at the underlying command:

        -bash-3.2$ hostname
        p1
        
        -bash-3.2$ ./createuser -h p1 -p 5432 -D -A -e u7
        Password: 
        CREATE ROLE u7 NOSUPERUSER NOCREATEDB NOCREATEROLE INHERIT LOGIN;

        —  Check the user u7 whether successfully created or not

        postgres=# \du 
                                     List of roles
         Role name |                   Attributes                   | Member of 
        -----------+------------------------------------------------+-----------
         nijam     |                                                | {}
         postgres  | Superuser, Create role, Create DB, Replication | {}
         rep       | Replication                                   +| {}
                   | 1 connection                                   | 
         u1        |                                                | {}
         u2        |                                                | {}
         u3        | Password valid until 2017-06-06 00:00:00-04    | {}
         u4        | Create DB                                      | {}
         u5        |                                                | {}
         u6        |                                                | {}
         u7        |                                                | {}
        postgres=# select usename,passwd,valuntil,usecreatedb from PG_SHADOW;                          
         usename  |               passwd                |        valuntil        | usecreatedb 
        ----------+-------------------------------------+------------------------+-------------
         postgres | md505ea766c2bc9e19f34b66114ace97598 |                        | t
         rep      | md5df2c887bcb2c49b903aa33bdbc5c2984 |                        | f
         u1       |                                     |                        | f
         u2       | u2                                  |                        | f
         u3       | md5dad1ef51b879799793dc38d714b97063 | 2017-06-06 00:00:00-04 | f
         nijam    |                                     |                        | f
         u4       | md54af10c3137cf79c12265e8d288070711 |                        | t
         u5       |                                     |                        | f
         u6       |                                     |                        | f
         u7       |                                     |                        | f
        (10 rows)

        — To create the user joe as a superuser, and assign a password immediately:

        -bash-3.2$ ./createuser -P -d -a -e u8
        Enter password for new role: 
        Enter it again: 
        Password: 
        CREATE ROLE u8 PASSWORD 'md5b9f930ae0484417a1883fd3f7cdb490e' SUPERUSER CREATEDB CREATEROLE INHERIT LOGIN;

        Note: when issuing the above utility you will get password prompt first prompt is u8 user password, second one is u8 user password confirmation and third prompt is super user password .

        — let us check the new user roles and privileges whether u8 user having  above mentioned privilege

        postgres=# \du                                                       
                                     List of roles
         Role name |                   Attributes                   | Member of 
        -----------+------------------------------------------------+-----------
         nijam     |                                                | {}
         postgres  | Superuser, Create role, Create DB, Replication | {}
         rep       | Replication                                   +| {}
                   | 1 connection                                   | 
         u1        |                                                | {}
         u2        |                                                | {}
         u3        | Password valid until 2017-06-06 00:00:00-04    | {}
         u4        | Create DB                                      | {}
         u5        |                                                | {}
         u6        |                                                | {}
         u7        |                                                | {}
         u8        | Superuser, Create role, Create DB              | {}

         

        Prev PostgreSQL User Creation
        Next PostgreSQL Drop user

        ADVERTISEMENT

        Latest Courses

        PostgreSQL Database

        PostgreSQL Database

        $600.00 $500.00
        Greenplum Database

        Greenplum Database

        $2,000.00 $1,500.00

        Preview Course

        Free

        Latest Posts

        PostgreSQL Patching version 9, 10,11
        10Oct2019
        Tools for PostgreSQL
        16Sep2019
        Postgres user creation and restrict DDL & database access
        13Sep2019

        Recent Forum Topics

        • Are you going to take your first ste
        • How to start working on an application?
        • please let me know pre requirements to increase work_mem
        • how to copy some data in one table to another table in postgres
        • postgres script for finding queries more than 1 hours ?

        2ndquadrant.in

        (+91) 8838953252

        ITsupport@rayafeel.com

        Company

        • About Us
        • Contact
        • Our Team
        • Blog

        COURSES

        • List Of Course
        • Become An Instructor
        • Events
        • Postgres Support Blog

        Support

        • DBA Support
        • Consultancy Services
        • Postgres Migration Blogs
        • Forum

        Recommend

        • Groups
        • Login
        • FAQs
        • SignUp

        IT Services by rayafeel.com. Powered by Rayafeel Technologies Pvt Ltd.

        • Privacy
        • Terms

        Become An Instructor?

        Join thousand of instructors and earn money hassle free!

        Get Started Now

        Login with:

        Login with Google Login with Twitter Login with LinkedIn Login with Microsoft

        Login with your site account

        Lost your password?

        Not a member yet? Register now

        Register a new account

        Are you a member? Login now

        Modal title

        Message modal