. This article will help you to  install PostgreSQL on CentOS, RHEL and Fedora Systems.

Add PostgreSQL Yum Repository

The first step is to install PostgreSQL repository in your system, Use one of below commands as per your system architecture and operating system.

CentOS/ 7 ###

rpm -Uvh https://download.postgresql.org/pub/repos/yum/10/redhat/rhel-7-x86_64/pgdg-centos10-10-2.noarch.rpm

CentOS/ 6 ###

rpm -Uvh https://download.postgresql.org/pub/repos/yum/10/redhat/rhel-6-x86_64/pgdg-centos10-10-2.noarch.rpm

Fedora 27 ###

rpm -Uvh https://download.postgresql.org/pub/repos/yum/10/fedora/fedora-27-x86_64/pgdg-fedora10-10-4.noarch.rpm

Fedora 28 ###

rpm -Uvh https://download.postgresql.org/pub/repos/yum/10/fedora/fedora-28-x86_64/pgdg-fedora10-10-4.noarch.rpm

Installing PostgreSQL Server

After enabling PostgreSQL yum repository in your system use following command to install PostgreSQL 10 on your system with yum package manager.

yum install postgresql10-server postgresql10

Initializing PGDATA

After installing PostgreSQL server, It’s required to initialize it before using the first time. To initialize database use below command.  /usr/pgsql-10/bin/postgresql-10-setup initdb

[root@iptables-server ~]# /usr/pgsql-10/bin/postgresql-10-setup initdb
Initializing database ... OK

Above command will  initialize PostgreSQL first time. PGDATA environment variable contains the path of the data directory.

PostgreSQL data directory Path is : /var/lib/pgsql/10/data/

[root@iptables-server ~]# ls /var/lib/pgsql/10/data/ -altr
total 52
drwx------. 4 postgres postgres 51 Jul 15 17:33 ..
-rw-------. 1 postgres postgres 3 Jul 15 17:33 PG_VERSION
drwx------. 2 postgres postgres 6 Jul 15 17:33 pg_twophase
drwx------. 2 postgres postgres 6 Jul 15 17:33 pg_tblspc
drwx------. 2 postgres postgres 6 Jul 15 17:33 pg_stat_tmp
drwx------. 2 postgres postgres 6 Jul 15 17:33 pg_stat
drwx------. 2 postgres postgres 6 Jul 15 17:33 pg_snapshots
drwx------. 2 postgres postgres 6 Jul 15 17:33 pg_serial
drwx------. 2 postgres postgres 6 Jul 15 17:33 pg_replslot
drwx------. 4 postgres postgres 36 Jul 15 17:33 pg_multixact
drwx------. 2 postgres postgres 6 Jul 15 17:33 pg_dynshmem
drwx------. 2 postgres postgres 6 Jul 15 17:33 pg_commit_ts
-rw-------. 1 postgres postgres 22775 Jul 15 17:33 postgresql.conf
-rw-------. 1 postgres postgres 88 Jul 15 17:33 postgresql.auto.conf
-rw-------. 1 postgres postgres 1636 Jul 15 17:33 pg_ident.conf
-rw-------. 1 postgres postgres 4269 Jul 15 17:33 pg_hba.conf
drwx------. 2 postgres postgres 18 Jul 15 17:33 pg_xact
drwx------. 3 postgres postgres 60 Jul 15 17:33 pg_wal
drwx------. 2 postgres postgres 18 Jul 15 17:33 pg_subtrans
drwx------. 2 postgres postgres 18 Jul 15 17:33 pg_notify
drwx------. 2 postgres postgres 4096 Jul 15 17:33 global
drwx------. 5 postgres postgres 41 Jul 15 17:33 base
drwx------. 4 postgres postgres 68 Jul 15 17:33 pg_logical
drwx------. 2 postgres postgres 6 Jul 15 17:33 log

Start / Enable  PostgreSQL Server

To start PostgreSQL service using the following command as per your operating systems. Also, enable PostgreSQL service to autostart on system boot.

For CentOS/RHEL 7 and Fedora

systemctl start postgresql-10
systemctl enable postgresql-10

For CentOS/RHEL 6

service postgresql-10 start
chkconfig postgresql-10 on

Check and Verify PostgreSQL Installation

After  the  above steps, your setup of  Postgresql 10 server is ready , Let’s log in to verify that installation completed successfully.

su - postgres

Use psql command to access PostgreSQL prompt with admin privileges.

[root@iptables-server ~]# su - postgres
-bash-4.2$ psql
psql (10.4)
Type "help" for help.

postgres=#

You may create password for user postgres

postgres=#\ password postgres

Congratulation  you  PostgreSQL installation  Server is completed

Please share  .

The post How to Install PostgreSQL 10 on CentOS/RHEL 7/6 and Fedora 27/28 appeared first on Linux Windows and android Tutorials.