Change a Password for PostgreSQL on Linux via Command Line

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PostgreSQL supports many client authentication methods, but in this case we’re only going to concern ourselves with two: password and md5.

Note: The default authentication method for PostgreSQL is ident. If you’d like to change the PostgreSQL authentication method from ident to md5, then visit the linked tutorial!

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Install and Connect to PostgreSQL 10 on Ubuntu 16.04

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PostgreSQL (pronounced “post-gress-Q-L”) is a household name for open source relational database management systems. Its object-relational meaning that you’ll be able to use objects, classes database schemas and in the query language.  In this tutorial, we will show you how to install and connect to your PostgreSQL database on Ubuntu 16.04.

 

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How To Install and Connect to PostgreSQL on Fedora 23

Reading Time: 2 minutesPostgreSQL is a free, open-source object-relational database management system (object-RDBMS), similar to MySQL, and is standards-compliant and extensible. It often is used as a back-end for web and mobile applications. PostgreSQL, or ‘Postgres’ as it is nicknamed, adopts the ANSI/ISO SQL standards together, with the revisions.

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Change PostgreSQL Authentication Method from Ident to MD5

Reading Time: 2 minutesPostgreSQL supports multiple client authentication methods including: trust, reject, md5, password, gss, sspi, krb5, ident, peer, ldap, radius, cert, and pam. Here we’re only going to concern ourselves with two: ident and md5.

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What is the Default Password for PostgreSQL?

Reading Time: < 1 minuteWhen connecting to PostgreSQL on Linux for the first time many admins have questions, especially if those admins are from the MySQL world. By default, when PostgreSQL is installed, a postgres user is also added.

If you run the command:

cat /etc/passwd

… you’ll see the postgres user.

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How to Install and Connect to PostgreSQL on Fedora 22

Reading Time: < 1 minutePostgreSQL (pronounced ‘post-gres-Q-L’) is a free, open-source object-relational database management system (object-RDBMS), similar to MySQL, and is standards-compliant and extensible. It is often used as a back-end for web and mobile applications. PostgreSQL, or ‘Postgres’ as it is nicknamed, adopts the ANSI/ISO SQL standards together, with the revisions.

Pre-Flight Check

  • These instructions are intended specifically for installing PostgreSQL on Fedora 22.
  • I’ll be working from a Liquid Web Self Managed Fedora 22 server, and I’ll be logged in as root.

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How to Install and Connect to PostgreSQL on Fedora 21

Reading Time: < 1 minutePostgreSQL (pronounced ‘post-gres-Q-L’) is a free, open-source object-relational database management system (object-RDBMS), similar to MySQL, and is standards-compliant and extensible. It is often used as a back-end for web and mobile applications. PostgreSQL, or ‘Postgres’ as it is nicknamed, adopts the ANSI/ISO SQL standards together, with the revisions.

Pre-Flight Check

  • These instructions are intended specifically for installing PostgreSQL on Fedora 21.
  • I’ll be working from a Liquid Web Self Managed Fedora 21 server, and I’ll be logged in as root.

Continue reading “How to Install and Connect to PostgreSQL on Fedora 21”

How to Install and Connect to PostgreSQL on Fedora 20

Reading Time: < 1 minutePostgreSQL (pronounced ‘post-gres-Q-L’) is a free, open-source object-relational database management system (object-RDBMS), similar to MySQL, and is standards-compliant and extensible. It is commonly used as a back-end for web and mobile applications. PostgreSQL, or ‘Postgres’ as it is nicknamed, adopts the ANSI/ISO SQL standards together, with the revisions.

Pre-Flight Check
  • These instructions are intended specifically for installing PostgreSQL on Fedora 20.
  • I’ll be working from a Liquid Web Self Managed Fedora 20 server, and I’ll be logged in as root.

Continue reading “How to Install and Connect to PostgreSQL on Fedora 20”

How to Install and Connect to PostgreSQL on CentOS 7

Reading Time: < 1 minutePostgreSQL (pronounced ‘post-gres-Q-L’) is a free, open-source object-relational database management system (object-RDBMS), similar to MySQL, and is standards-compliant and extensible. It is commonly used as a back-end for web and mobile applications. PostgreSQL, or ‘Postgres’ as it is nicknamed, adopts the ANSI/ISO SQL standards together, with the revisions.

Pre-Flight Check
  • These instructions are intended specifically for installing PostgreSQL on CentOS 7.
  • I’ll be working from a Liquid Web Self Managed CentOS 7 server, and I’ll be logged in as root.

Continue reading “How to Install and Connect to PostgreSQL on CentOS 7”

How to Install and Connect to PostgreSQL on CentOS 6

Reading Time: < 1 minutePostgreSQL (pronounced ‘post-gres-Q-L’) is a free, open-source object-relational database management system (object-RDBMS), similar to MySQL, and is standards-compliant and extensible. It is commonly used as a back-end for web and mobile applications. PostgreSQL, or ‘Postgres’ as it is nicknamed, adopts the ANSI/ISO SQL standards together, with the revisions.

Pre-Flight Check
  • These instructions are intended specifically for installing PostgreSQL on CentOS 6.
  • I’ll be working from a Liquid Web Core Managed CentOS 6.5 server, and I’ll be logged in as root.

Continue reading “How to Install and Connect to PostgreSQL on CentOS 6”