Restart Postgres

It is available on Windows, MacOS, Linux and Unix based systems. su - postgres. In this post, I am sharing one of the important script to kill all running idle connections and sessions of the PostgreSQL Database. Azure Database for PostgreSQL allows you to restore the server back to a point-in-time and into to a new copy of the server. PostgreSQL Database Forums on Bytes. The pg_xlog directory is so important that Postgres cannot function until there is enough space cleared out to start writing files again. A complete Mattermost installation consists of 3 major components: a proxy server, a database server, and the Mattermost server. # Log into Postgres as the user named postgres $ psql -U postgres Opening a connection remotely To connect your remote PostgreSQL instance from your local machine, use psql at your operating system command line. For example, you can see the line for max_connection parameter below. Is there a way to have the server use the new pg_hba. 6 systemctl enable postgresql-9. As an alternative to setting up manually or reusing an existing server for Zabbix, users may download a Zabbix appliance or Zabbix appliance installation CD image. A cache maintenance service really is the perfect use case for this functionality, because it’s easy to reset the cache at service start or restart. By default, TCP/IP connection is disabled, so that the users from another computers can't access postgresql. If you have a users. I am using trac 0. Hi We are testing restart_after_crash = on What is a cras? We killed the Postgres process with -9 SIGSEGV SIGABRT etc. However, you can configure this by setting the cron. For more information on what each plan provides, see Choosing the Right Heroku Postgres Plan. In this article, let us review top 15 practical postgreSQL DBA command examples. ' Heroku Postgres provides a management layer around these roles, called credentials, that are tightly integrated with the rest of the Heroku platform. 4 Configure PostgreSQL-Configure TCP/IP. To use PostgreSQL support, you need PostgreSQL 6. Replace the peer method to md5, save and close the file and restart postgresql. # Log into Postgres as the user named postgres $ psql -U postgres Opening a connection remotely To connect your remote PostgreSQL instance from your local machine, use psql at your operating system command line. You can find information on the right side of the parameters in the postgresql. service showed my service active and running!. The system responds with a series of messages indicating that the PostgreSQL service is started. The pg_prewarm module is part of the PostgreSQL contrib package and is usually available on your server by default. Reset/Restart/Set a Identity Column in SQL Server / MYSQL / PostgreSQL A relative common task that you will do someday in your life will be to reset an identity columns. How do you stop posgresql on centos 7? grep postgresql' 1st and get the full name of the service How stop-start-restart-status stunnel as a service on centos 7. the configuration file postgresql. Look for the service with the name postgresql. Both Redis and PostgreSQL are persistent and survive server restarts and crashes etc. To view a list of the parameters that require a server restart, execute the following query at the EDB-PSQL command line (see Figure 6. This quick-start guide demonstrates how to use Docker Compose to set up and run a simple Django/PostgreSQL app. 1 under a CentOS 7. Compared to other RDBMSs, PostgreSQL differs itself with its object-oriented and/or relational database functionality, such as the complete support for reliable transactions, i. ' Heroku Postgres provides a management layer around these roles, called credentials, that are tightly integrated with the rest of the Heroku platform. Start the website (IIS 7+ used), visit the web page (once at least). The '*' setting enables Postgres to listen on all IP addresses. PostgreSQL supports multiple client authentication methods. However, restarting an instance causes a disruption in service, and empties the instance cache. From on-premise to cloud or on-premise to on-premise or cloud to on-premise. This is done with the -D option. Starting a Postgres superuser psql session in Geo tracking database. I just changed postgresql. Please check the log output. For example: max_connections = 100 # (change requires restart) If you change a parameter using ALTER SYSTEM you can query the view pg_settings and look at the column pending_restart. apigee-service: apigee-postgresql: apigee-postgresql is dead Waiting for postgres to finish start psql: could not connect to server: No such file or directory. 1/32 md5 You can start/restart the postgres server, in case it is not running, using the following command −. For Ubuntu-based systems, install the postgresql, libpq-dev, and python-psycopg2 packages on the remote host before using this module. 2 Login as the system postgres user by typing su postgres and giving the password. sudo apt-get install pgadmin3. PostgreSQL can be used on Linux, Unix, BSD, and Windows servers. 3, python 2. We can achieve that by running the following:. I have run the start command on the postgres command line, and nothing seems to happen. Download latest version: 5. To restart either service, run gitlab-ctl restart SERVICE. There may be times in the documentation where you will be asked to restart GitLab. The example in that link uses option `-p 5433". The PostgreSQL object-relational database system provides reliability and data integrity. $ sudo -u postgres createuser -U postgres repuser -P -c 5 --replication This command performs the following actions: sudo -u postgres ensures that the createuser command runs as the user postgres. 4 restart On CentOS 7 systems: systemctl restart postgresql-9. Howto install PostgreSQL 9. The above changes to the default PostgreSQL configuration will make it easy to install OpenNMS on your server, but it also allows for anyone with a local user account to have full access to said DB. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. How to Start, Stop, Restart PostgreSQL Database Server on Linux CentOS 6. Ambari provides a dashboard for monitoring health and status of the Hadoop cluster. This will start Postgres (assuming default directories):. This tutorial will help you to install the PostgreSQL database server on Debian 8 Jessie systems. Since there is no init system running in the container, the only process running in the container is postgres itself, so docker restart container-name or docker kill -sTERM container-name followed by docker start container-name will work. opts, within the PostgreSQL data path (PGDATA). Postgres server out of disk space; Restart the apigee-postgresql service to ensure that the property set in Step 4 above gets updated into the config file pg_hba. Restart PostgreSQL On OSX:. Restart a server. sudo service postgresql-9. It is the world. Within the postgresql. Before you start using the PHP PostgreSQL interface, find the pg_hba. To start PostgreSQL service using the following command as per your operating systems. Introduction to the PostgreSQL ROW_NUMBER() function. database_name configuration parameter in postgresql. Streaming replication in PostgreSQL works on log shipping. Reload the page again. Please refer to the PostgreSQL Administrator's Guide if you would like to configure alternatives like Kerberos. IDENT authentication method is used for postgres and local users, unless otherwise configured. PostgreSQL (most people call it Postgres) is an advanced object-relational database management system (ORDBMS). After the 320 minute cool-off period is reached, restart attempts happen every 320 minutes. The reboot is needed so that the changes that we have done can be affected on the. Add line:-A INPUT -m state --state NEW -m tcp -p tcp --dport 5432 -j ACCEPT. To start PostgreSQL service using the following command as per your operating systems. Save and exit the file, and restart the Datadog Agent (find the command for your OS here). Pricing information for Heroku Postgres plans is available on the Heroku Postgres add-on page. Symfony, High Performance PHP Framework for Web Development About. The following steps restart the PostgreSQL server: In the Azure portal, select your Azure Database for PostgreSQL server. ISSUE TYPE Bug Report COMPONENT NAME Installer SUMMARY Restarting the AWX environment (by removing containers and re-running installer playbook) fails to start postgres container. conf; Restart Postgres (Ensure any tomcat instances pointed to the databases on the server are stopped. Confirm server restart is successful. Even when I try to run the service manually I'm getting UTC FATAL: could not create lock file "/var. When you install PostgreSql database on a windows machine, it installs a service on the system. I had previously reported this a while. For instance, in the last example, you were instructed to get to the Postgres prompt by first switching to the postgres user and then running psql to open the Postgres prompt. Therefore, we would be able to apply new options without re-reading the configuration file to check if the include is present not. PostgreSQL Tools. 2 Login as the system postgres user by typing su postgres and giving the password. conf or what is on custom_conf). PostgreSQL supports multiple client authentication methods. The first allows Postgres to listen on all local IPs where as the second specifies an explicit IP for Postgres to listen on (change this to your IP!): listen_addresses='*' listen_addresses='204. PostgreSQL documentation for the conditions that the database server needs a restart or a reload. Step 1 – Add Postgres Yum. Exclude PostgreSQL packages from the repository of the distro. Listen and Notify Support in Drivers. conf authentication without restarting the production server. To make life simple, remove all other versions of Postgres. Should "restart" with pg_ctl or /etc/init. conf file so that I could connect with any machine on the same subnet as the server. This wikiHow teaches you how to force a currently running service to restart in Linux. 6a can be considerded as good beta quality ( with some known issues and missing features). My mobile hotspot works rather good in general, but the second I lose a stable connection to PostgreSQL server I have to restart QGIS which is really frustrating :(. Click Yes to confirm restarting the server. $ sudo systemctl restart postgresql How to Use PostgreSQL on Ubuntu. d/tomcat restart Restart PostgreSQL. This is to login to the postgres ‘program’ pg_ctl -m fast restart. To start PostgreSQL service using the following command as per your operating systems. Docker makes it very easy to spin up a PostgreSQL database management system. How do I install and configure Postgresql database server under Red hat Enterprise Linux 5 / CentOS 5 / Fedora Linux? A. (3 replies) Should "restart" with pg_ctl or /etc/init. This feature allowed us to stay more up-to-date than is possible with file-based log shipping, by transferring WAL records (a WAL file is composed of WAL records) on the fly (record based log shipping), between a master server and one or several slave servers, without waiting for the WAL file to be filled. Generally, restart or reload is required when changes are made to the postgresql. Masking a service (from what I understand) essentially symlinks it to /dev/null. This chapter explains about installing the PostgreSQL on Linux, Windows and M. custom_dns_resolution by setting it to 1, and restart the DB instance for the changes to take place. There may be times in the documentation where you will be asked to restart GitLab. Templates to monitor PostgreSQL by Zabbix. d / postgresql restart. “From project planning and source code management to CI/CD and monitoring, GitLab is a complete DevOps platform, delivered as a single application. Every transaction in postgres is written to a transaction log called WAL (write-ahead log) to achieve durability. It doesn’t start or restart after updates on Mac, Windows and other operating systems. Paradoxically its installation on Windows, in trying to ease deployment, makes system configuration so "plug-and-play" that almost no one seems to know how to make even the tiniest deviances from the default installation configuration. Then restart the postgresql service to apply the recent changes. 3 environment. ISSUE TYPE Bug Report COMPONENT NAME Installer SUMMARY Restarting the AWX environment (by removing containers and re-running installer playbook) fails to start postgres container. Installation. PostgreSQL restart with PgBouncer without losing client connections. 1BestCsharp blog 5,704,921 views. Click Nodes, select the vCenter Server Appliance node and click the Related Objects tab. 2 and prior, ensure these settings are in postgresql. # Disable feature detection by this undocumented parameter. How to Alter Sequence in PostgreSQL. Step 4: Switch to the Default PostgreSQL User. This is to login to the postgres 'program' pg_ctl -m fast restart. pg_ctl is a utility for initializing a PostgreSQL database cluster, starting, stopping, or restarting the PostgreSQL database server (postgres), or displaying the status of a running server. conf files, restart PostgreSQL for the changes to take effect. Please check the log output. I have a Postgres db 9. Do I ever need to restart postgres if the only thing I change is postgres. Before you start using the PHP PostgreSQL interface, find the pg_hba. PostgreSQL is a powerful, highly scalable, open source and cross-platform object-relational database system that runs on Unix-like operating systems including Linux and Windows OS. Restart PostgreSQL service. There are versions available for a wide range of operating systems, including Linux, Windows, Mac OS X, Solaris, BSD, Tru64, and others. Restart PostgreSQL On OSX:. Finally, you can use the Task Manager app to start, stop and restart services in Windows 10. In the SSH terminal, enter: sudo service postgresql restart. systemctl restart postgresql-9. For instance, in the last example, you were instructed to get to the Postgres prompt by first switching to the postgres user and then running psql to open the Postgres prompt. If the remote host is the PostgreSQL server (which is the default case), then PostgreSQL must also be installed on the remote host. When I reboot the server machine (sudo shutdown -r now), I am initially not able to connect to the postgresql server. - a_horse_with_no_name Sep 2 '18 at 7:51 Are you sure ou need to restart the database and not Pgadmin?. The GENERATED AS IDENTITY constraint is the SQL standard-conforming variant of the PostgreSQL's SERIAL column. In the event that you don’t have (or don’t wish to use) Homebrew for Postgres, yet you have Postgres installed already, you can also manually start it with pg_ctl, which is the launch utility provided by Postgres itself. Docker makes it very easy to spin up a PostgreSQL database management system. In this article, I will show you how to setup PostgreSQL 11 replication. su - postgres. 1 and pgRouting with Yum Printer Friendly In this exercise, we'll go thru installing PostgreSQL 9. I have Postgresql 9. sudo netstat -antup | grep 5432. pg_prewarm is a module which allows you to automatically prewarm your caches after a database failure or a simple restart. 3 environment. Amazon Aurora PostgreSQL-compatible Edition Benchmarking Guide, October 2017 – Page 1 1. This short guide will help you to Install PostgreSQL 11 on Ubuntu 18. “From project planning and source code management to CI/CD and monitoring, GitLab is a complete DevOps platform, delivered as a single application. Compared to other RDBMSs, PostgreSQL differs itself with its object-oriented and/or relational database functionality, such as the complete support for reliable transactions, i. Use-case I had to migrate my PostgreSQL running on an EC2 server to RDS PostgreSQL for production environment with NO to minimal downtime & NO data loss which occurs when we usually make a dump, restore it and change the DB host. The example in that link uses option `-p 5433". Writing RESTART with no restart value is equivalent to supplying the start value that was recorded by CREATE SEQUENCE or last set by ALTER SEQUENCE START WITH. 3 provides a tsearch2 compatibility layer to run old applications, but with recent MediaWiki versions (tested on 1. It is a popular choice for many small and large projects and has the advantage of being standards-compliant and having many advanced features like reliable transactions and concurrency without read locks. 3, python 2. This is a quick guide to install PostgreSQL 10 - tested on Ubuntu 16. You can connect to PostgreSQL database. Symfony, High Performance PHP Framework for Web Development About. 5: A quick start on Fedora 24. Today we will show you how to restart postgresql on Linux, you will also learn how to stop,. reload Causes the configuration files to be re-read without a full shutdown of the server. So you can restart version X while keeping version Y and Z untouched and running. It's a powerful database server and can handle high workloads. I installed PostgreSQL 10. The restarting of Postgres was not what resolved the issue, as I had restarted Postgres several times, with prior changes (making a change, restart Postgres, wait 10 or so minutes to see if the CPU spiked, when it did, revert the change, then try the next thing), prior to landing on this change. sudo -u postgres psql -U postgres sudo -u postgres psql List databases on postgresql server: psql -l [-U myuser] [-W] Turn off line pager pagination in psql: \pset pager Determine system tables: select * from pg_tables where tableowner = 'postgres'; List databases from within a pg shell: \l List databases from UNIX command prompt: psql -U. A complete Mattermost installation consists of 3 major components: a proxy server, a database server, and the Mattermost server. Step 4: Switch to the Default PostgreSQL User. To start PostgreSQL service using the following command as per your operating systems. • Upgrading a previous version of Nagios XI will continue to use the PostgreSQL service mysqld restart the documentation on repairing the Nagios XI databases. Writing RESTART with no restart value is equivalent to supplying the start value that was recorded by CREATE SEQUENCE or last set by ALTER SEQUENCE START WITH. chat alerts sbt sign-in sorting htacces nextcloud onlyoffice. 3, the PostgreSQL interactive terminal. First, switch to the postgres account and open the Postgres shell as follows. However, if I restart the server: systemctl restart postgresql. This information can be very beneficial when profiling your application and determining queries that have “gone wild” and are eating CPU cycles. PostgreSQL supports multiple client authentication methods. and now restart iptables. Although the server can be started manually, pg_ctl encapsulates tasks such as redirecting log output and properly detaching from the terminal and process group. As part of the installation Postgres adds the system user postgres and is setup to use “ident” authentication. The service is started ( postmaster. you can start/stop/reload/restart the postgresql server using postgresql service ,it will work only on root user path not good for postgres user as defaulty. Run the /scripts/restartsrv_postgresql restart command to restart PostgreSQL. lets capitalism reaming buyout autovacuum ngix osm email-migration lies refund end_of_webfaction disaster bar chunked creditcard cmake libcrypto rocket. For instance, in the last example, you were instructed to get to the Postgres prompt by first switching to the postgres user and then running psql to open the Postgres prompt. PostgreSQL 10 Released. Observe that the server status changes to "Restarting". To complete the configuration, you must also do the steps described in Configure Postgres SSL to Allow Direct Connections from Clients, to place the certificate files in the correct location on the client computers. opts, within the PostgreSQL data path (PGDATA). We use cookies for various purposes including analytics. These numbers are known as "sequences" and have their own designated table. Example of configuration : $ cd /etc/postgresql/9. In that case, you need to run the following command:. 393 /* make sure the passed slot is suitable, these are user facing errors */. # systemctl restart postgresql. Now, on rebooting postmaster fails to start - it > has started just fine for a month. This must be done while logged into the PostgreSQL user account. If you are a mySQL administrator, check-out our 15 examples of mysqladmin command article that we discussed a while back. PostgreSQL - How to reset user name "postgres" password PostgreSQL is an open source RDBMS (Relational DataBase Management System) that is not only feature rich, fast and light but also easy to use. For example: max_connections = 100 # (change requires restart) If you change a parameter using ALTER SYSTEM you can query the view pg_settings and look at the column pending_restart. d/tomcat restart Restart PostgreSQL. Is there a way to have the server use the new pg_hba. systemctl start postgresql-9. Spring Boot + JPA (Hibernate) + Atomikos + PostgreSQL = exception! To suppress this behaviour you have to disable driver's feature detection and configure it's features manually. Actual Results: [SocketException (0x2746): An existing connection was forcibly closed by the remote host]. conf and in addition the values from postgresql. On my system there is a php package, a postgresql package, AND another package which makes postgresql available from php. 3 RPMs for RHEL 7. The server restart will be blocked if the service is busy. See the chkconfig man page for more information. Within the postgresql. 04 as well, with one minor modification detailed below. 0/24 and the primary will be node0. This query list out all the parameters which require your postgresql database restart. Otherwise, register and sign in. Within the postgresql. In this last section, we will show how to create a new database user and a database role to manage it. Official postgres plugin for dokku. conf authentication without restarting the production server. Next, the instance restarts and is ready to accept new connections. 2019 2019-11-07T22:44:49Z Welcome! https://nunobarreiro. To restart Tomcat sudo /etc/init. 1 under a CentOS 7. It is designed with security in mind. Similar to the previous command, if you need superuser access to the bundled Geo tracking database (geo-postgresql), you can use the gitlab-geo. PostgreSQL can be installed using RPMs (binary) or SRPMs (source) managed by YUM. PostgreSQL Overview. Writing RESTART with no restart value is equivalent to supplying the start value that was recorded by CREATE SEQUENCE or last set by ALTER SEQUENCE START WITH. Next, the instance restarts and is ready to accept new connections. It is the world. From the list of services, right-click on the service you wish to restart. Masking a service (from what I understand) essentially symlinks it to /dev/null. For PostgreSQL, it is usually safe to restart the master node by default. However, restarting an instance causes a disruption in service, and empties the instance cache. PostgreSQL has three shutdown modes: smart, fast, and immediate. Postgresql server not started in ubuntu 14. Ambari leverages Ambari Alert Framework for system alerting and will notify you when your attention is needed (e. CLI is runnable in long running process mode, which will periodically send the gathered metrics forward. Restarting an instance Restarting an instance drains the connections from the instance and stops it. Today we will show you how to restart postgresql on Linux, you will also learn how to stop,. Raise this value if needed. Azure Database for PostgreSQL Hyperscale is now Azure Arc-enabled. – Stop Postgres – Start Postgres – Start Ambari server We need to restart Postgres so that our changes can take effect. Step 1 - Add Postgres Yum. sh restart postgresql $ sudo installdir/ctlscript. 3, PostGIS 2. It is possible to specify -o multiple times. Installing and configuring PostgreSQL on a Linux. This chapter explains about installing the PostgreSQL on Linux, Windows and M. You can skip ahead to the connection tasks section. e installed all kinds of postgres X. How to Access PostgreSQL Database Remotely Using pgAdmin on Windows Updated Monday, July 23, 2018 by Linode Written by Linode Use promo code DOCS10 for $10 credit on a new account. It will terminate the entire process which can lead to a full database restart in. PostgreSQL emulates TCP/IP ports on unix sockets by using the port number as the suffix for the socket file, e. PostgreSQL Tools. PostgreSQL is an object-related database management system. To enable it, use this line in your postgresql. the postgres prompt can be accessed by typing $ psql. The TIE Server relies on a PostgreSQL database to store its reputation data. service iptables restart. Reclaiming space on VMware Postgres (vPostgres) databases within the VMware vCenter Server Appliance 5. 5, Pypgsql 2. Example of how to create a database, user, role, table, and insert records into a postgresql database. The following steps restart the PostgreSQL server: In the Azure portal, select your Azure Database for PostgreSQL server. Pricing information for Heroku Postgres plans is available on the Heroku Postgres add-on page. If you have a users. In this post, I am sharing one of the important script to kill all running idle connections and sessions of the PostgreSQL Database. Restart postgres and set superuser passwordvalue) pg_ctlcluster 10 main restart sudo su - postgres -c psql \password \quit exit Installing PostgreSQL on Microsoft Windows. pgAdmin may be used on Linux, Unix, Mac OS X and Windows to manage PostgreSQL 9. Reseting the Root Password for Debian 8 "jessie" and older. There may be times in the documentation where you will be asked to restart GitLab. PostgreSQL can be used to host the database for a variety of applications ranging from small websites to large cloud based applications or data warehousing. This is guide, howto install PostgreSQL 11. Restart postgresql sudo service postgresql restart and test the connection on each servers with the following commands: psql 'host=server1 dbname=repmgr user=repmgr' psql 'host=server2 dbname. PostgreSQL provides the psql command line program as primary front-end, which can be used to enter SQL queries directly or execute them from a file. which will leave the server running in the foreground. Restart PostgreSQL On OSX:. restart identityが指定された場合、暗黙的にalter sequence restart操作がトランザクション的に安全に行われます。 つまりそれを囲むトランザクションがコミットされなければ、ロールバックされます。 これは通常のalter sequence restartとは異なる動作です. PostgreSQL is an open source object-relational, highly scalable, SQL-compliant database management system. conf file in your PostgreSQL installation directory and add the following line − # IPv4 local connections: host all all 127. A local socket is the prefered method of connecting to a database as it removes much of the overhead of creating a TCP connection and transferring data. The gitlab-psql command cannot be used to connect to a remote Postgres server, nor to connect to a local non-Omnibus Postgres server. It's possible to change the protocol for DATABASE_URL by setting the environment variable POSTGRES_DATABASE_SCHEME on the app: dokku config:set playground POSTGRES_DATABASE_SCHEME=postgres2 dokku postgres:link. Start Stop Disable Postgresql service. Caution! When using some distribution-specific Postgres packages some extra attention is needed. PostgreSQL is installed per our tutorial on: How to Install and Connect to PostgreSQL on CentOS 7. PostgreSQL has extensive and good help that should be the first source of information regarding this database product. Systemd provides more functionality than upstart, including the ability to mask a service so that it cannot be started. A complete Mattermost installation consists of 3 major components: a proxy server, a database server, and the Mattermost server. It is the power user's database. The above changes to the default PostgreSQL configuration will make it easy to install OpenNMS on your server, but it also allows for anyone with a local user account to have full access to said DB. d/ location?. status - requests status of service. Linux PostgreSQL Restart Command. 5 or later, PostgreSQL 8. Run this command to verify the space usage decrease: df -h Note: The database is located at /storage/db. The restarting of Postgres was not what resolved the issue, as I had restarted Postgres several times, with prior changes (making a change, restart Postgres, wait 10 or so minutes to see if the CPU spiked, when it did, revert the change, then try the next thing), prior to landing on this change. Even when I try to run the service manually I'm getting UTC FATAL: could not create lock file "/var. We can do so by executing the systemctl command with the restart option. The ROW_NUMBER() function is a window function that assigns a sequential integer to each row in a result set. It doesn’t start or restart after updates on Mac, Windows and other operating systems. Installing Apache Tomcat on Debian (Ubuntu/Kubuntu/Linux Mint) Then restart Tomcat. #port = 5432 # If we want to change the port PostgreSQL listens on, uncomment this line and enter the desired number - this change requires PostgreSQL restart. It is the world. To back up your databases, log in to your server as the root user via SSH and perform the following steps: Back up the PostgreSQL databases on your server. The system responds with a series of messages indicating that the PostgreSQL service is started. Check if the server name or the port number is misspelt or incorrect. In our article we instruct on how to install this database onto your CentOS 7 server. Streaming replication in PostgreSQL works on log shipping. For PostgreSQL version 10 and above:. To enable it, use this line in your postgresql. In CentOS it would e. To find the Postgres server version from the shell command line, simply issue a postgres command with the -V flag (for version): $ postgres -V postgres ( PostgreSQL ) 9. pgAdmin may be used on Linux, Unix, Mac OS X and Windows to manage PostgreSQL 9. \postgres, this is the user account that is used by the postgreSQL server to operate.