How can I learn ubunu postgresql version as default? - postgresql

When I install the ubuntu server, the postgresql repository package names are installed on server automatically. So when I type command sudo apt-get install postgresql it will start installation. But which version will be installed? I don't know it.
So how can I learn which version will be installed?

Related

delete postgresql server from mac

I installed postgresql server on mac with brew install postgres because I want to practice it but it seems I installed the wrong thing? What I need is to run the installer from the official website ?
I cannot find how to uninstall the postgresql server
What you have installed was correct. But if you want to install .dmg package of postgres then you can do that as well.
First, uninstall the current version of Postgres by using
brew uninstall postgres
and then Navigate to the following below URL to get your desire Postgres .dmg package
offical Postgres .dmg for mac
Disclosure: I work for EnterpriseDB (EDB), we create and certify the Mac installers for all supported PostgreSQL versions.

Mongodb Version mismatch Issue 3.6 to 4.0 upgrade

I have installed the latest version of MongoDB i.e 4.0.10. I am using Ubuntu 18.04.
When i run mongod --version in putty command line i get version 4.0.10
But When i run query in Studio3T db.version(); i get version 3.6.3
I ran dpkg -l | grep mongo and got following output.
Please help me in identifying what i am doing wrong here.
Looks like you have two MongoDBs installed, judging from 3.6.3-0ubuntu1 installed by apt, and 4.0.10 versions there.
The page Install MongoDB Community Edition on Ubuntu stated:
The mongodb package provided by Ubuntu is not maintained by MongoDB Inc. and conflicts with the mongodb-org package. To check if Ubuntu’s mongodb package is installed on the system, run sudo apt list --installed | grep mongodb. You can use sudo apt remove mongodb and sudo apt purge mongodb to remove and purge the mongodb package before attempting this procedure.
The older 3.6.3 appears to be still running in port 27017, thus that was the one connected to by Studio3T.
To ensure a clean installation, it's better to do a clean install by:
Follow the instructions in Uninstall MongoDB Community Edition
Remove 3.6.3 using apt as per the instruction above
Reinstall using the procedure in Install MongoDB Community Edition on Ubuntu.
It's probably not required to uninstall/reinstall everything again, but you don't want to have conflicting leftover files that will create problems down the road.
If you need the data in the old 3.6.3, please do mongodump before uninstalling it. You can subsequently restore it later.

Howto install PostgreSQL 9.6.6 using apt-get on Ubuntu

Is it possible to use apt-get to install a very specific version of PostgreSQL. I would like to install PostgreSQL 9.6.6. I followed the instructions on the postgres download page. This will get the current latest version which is 9.6.7.
Thanks in advance.

Installing postgresql 9.5.3 with homebrew

I need to install postgresql 9.5.3 using homebrew. First I search for version of postgresql using
brew search postgresql
homebrew/versions/postgresql93 ✔ homebrew/versions/postgresql94
But I do not see my version. Could you help me please to install postgresql 9.5.3 with homebrew?
To install use this command on your terminal
brew install postgresql#9.5

Error when creating unaccent extension on PostgreSQL

I am trying to configure PostgreSQL to use fulltext search in my rails app as mentioned in this Railscast.
I am using a fresh Ubuntu 12.04 server running PostgreSQL 9.1.5 installed using apt-get with the ppa:pitti/postgresql with precise.
I get the following error when trying to run the migration and when I try the same command in the psql console with the peer postgres user:
postgres=# CREATE EXTENSION unaccent;
ERROR: could not open extension control file "/usr/share/postgresql/9.1/extension/unaccent.control":
No such file or directory
In my local box running Ubuntu 10.04 desktop I use the same repository (natty) and it works well.
Any insights would be greatly appreciated.
You need to install the package postgresql-contrib-9.1 in your system first. (Adapt to your version number! Here is the currently available list of packages.) That's the case under Debian, Ubuntu & friends anyway. Using a system user with the necessary privileges:
apt-get install postgresql-contrib-9.1
If your currently logged in user does not have the necessary privileges (but sudo rights):
sudo apt-get install postgresql-contrib-9.1
Quoting the PostgreSQL Apt Repository:
If the version included in your version of Debian is not the one you
want, you can use the PostgreSQL Apt Repository.
There are basic install instructions on the Postgres website for each available OS.
For accent-insensitive indices using unaccent consider this related question:
Does PostgreSQL support "accent insensitive" collations?
On CentOS:
sudo yum install postgres*contrib