How to remove PostgresSQL on ubuntu 18.04
$ sudo apt-get — purge remove postgresql
[sudo] password for firdaus:
Reading package lists… Done
Building dependency tree
Reading state information… Done
The following packages will be REMOVED:
postgresql*
0 upgraded, 0 newly installed, 1 to remove and 43 not upgraded.
After this operation, 66,6 kB disk space will be freed.
Do you want to continue? [Y/n] Y
(Reading database … 192250 files and directories currently installed.)
Removing postgresql (11+204.pgdg18.04+1) …
ru-developer
Выполняем последовательность команд. Последовательность избыточна. В зависимости от того, как эксплуатировалась база некоторые команды могут сообщить, что они ничего полезного не сделали.
sudo apt-get —purge remove pgadmin3
sudo apt-get —purge remove postgresql\*
sudo rm -r /etc/postgresql/
sudo rm -r /etc/postgresql-common/
sudo rm -r /var/lib/postgresql/
sudo userdel -r postgres
sudo groupdel postgres
How To Completely Uninstall PostgreSQL
If you’re using PostgreSQL, you may need to remove the package from your system at some point. It’s important to know how to uninstall PostgreSQL properly to make sure all components of the package are completely removed and you don’t encounter any errors. In this article, we’ll explain how to uninstall PostgreSQL from Linux, macOS and Windows operating systems.
NOTE: Be sure to elevate the privileges for any of the commands in this article with sudo if the terminal returns a Permission denied error.
Uninstall and remove PostgreSQL on Debian Linux
You can use the apt-get command to completely remove PostgreSQL on a Debian-based distribution of Linux such as Linux Mint or Ubuntu:
Grep for all PostgreSQL packages in Debian Linux
You can use the dpkg command for managing Debian packages, in conjunction with grep , to search for all the package names installed that contain the sub-string postgres . An example of this command is shown below:
Finally, make sure to use the APT-GET repository’s —purge remove command, followed by the postgres package name. This command will remove the package and purge all the data associated with it:
Remove all of the PostgreSQL data and directories
Use the rm command with the -rf options to recursively remove all of the directories and data for the postgresql packages:
After you complete your rm commands, execute the dpkg -l | grep postgres command one more time to verify that all of the packages have been removed.
Uninstall and remove PostgreSQL packages on Fedora Linux
You can use the YUM repository’s yum command to uninstall PostgreSQL on Fedora-based distributions of Linux such Red Hat or CentOS:
To use a wildcard operator ( * ) to remove all packages with names beginning with postgres , use the following command:
Be sure to remove the pgsql directory as well:
NOTE: Keep in mind that sudo is not enabled for RHEL users by default. Instead, use the su (switch user) command to enter as root and execute the above commands with elevated privileges if necessary.
Grep for the PostgreSQL packages in Fedora using ‘rpm’
You can use the rpm command with the -qa options to grep for any packages that contain “postgres” in their name:
If you prefer, you can shorten the search to something like post as well:
You can also use grep in conjunction with YUM’s list command to return a list of all package instances of PostgreSQL:
Uninstall the PostgreSQL package using YUM remove
Once you’ve located the package, use YUM’s remove command to uninstall PostgreSQL from your Linux system:
Navigate to the assigned directory for the PostgreSQL data, and then use the rm command to delete all of your databases and tables.
Uninstall and remove PostgreSQL from Windows
If you’re using Windows, type uninstall or remove into the search bar at the bottom left-hand side of the screen:
Then, follow the steps for the removal process, making sure to select the “Entire Components option when prompted.
You’ll see a pop-up stating something like: The data directory s(C:\Program Files\PostgreSQL\11\data) has not been removed . Simply click “OK” to close the pop-up window, and do not select the option to restart your PC.
Delete the data folder for PostgreSQL in Windows
After you’ve completed the removal process described in the previous section, open File Explorer for Windows and navigate to the data folder. Right-click the data folder and click the Delete button. Be sure to empty the recycle bin afterwards to ensure that any sensitive data has been properly deleted.
After all of the data has been deleted, you should restart Windows 10.
Uninstall and remove PostgreSQL on macOS
To uninstall PostgreSQL on macOS, open a new instance of Finder and navigate to the Applications directory. Look for the PostgreSQL folder and drag its contents to the Trash application folder in macOS.
Remove the PostgreSQL data in a terminal in macOS
After you’ve removed the PostgreSQL folder, open the Utilities folder in a Finder window, and then open the Terminal application.
Use the cd command to navigate to the PostgreSQL directory. You can do this by typing the directory path into the terminal prompt and pressing Return:
Then, use the rm -rf command to remove the directory and its contents:
Don’t forget to empty the Trash application’s contents when you are finished.
Uninstall the Homebrew installation of PostgreSQL on macOS
You can use the brew command in a macOS terminal window to remove the Homebrew version of PostgreSQL. First, use the list command to return all of the applications installed using Homebrew:
Then, use the following command to force the removal the Homebrew installation of postgresql :
Conclusion
If you find yourself needing to uninstall PostgreSQL, it’s important to do a careful and thorough job. Taking shortcuts when it comes to the removal process can leave sensitive data remaining on your machine. In this article, we explained how to uninstall and remove PostgreSQL from Windows, Linux and macOS. With the step-by-step instructions detailed in this tutorial, you’ll be ready to remove PostgreSQL from any of your own machines.
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How to remove Postgres from my installation?
I have ubuntu 9.10(karmic), and when I attempted to install a new program, the postgres was installed as a dependency of that program, no problem at all if the installation occurs with success, but there was an error, and the Postgres was not installed and the application is not working. I had tryed to update the Postgres and nothing, only the message «there was an error and your postgres can not be installed»
Now I want to remove completely the Postgres from my machine, how can I do that, I do not want to kill the process every boot. I just want to remove Postgres.
What is the command line?
5 Answers 5
The simplest way to do this is to open a terminal and type:
This will also prompt you to remove that software that depends on Postgres, which in this case it appears you would like to do.
I do not personally run 9.10 or Postgres, so it is possible that Postgres installs itself in several parts. In that case, a simple:
Will get you the list of those packages that Postgres installed. Then, just use the same "apt-get —purge remove . " command but instead of just postgresql, type each package name, separated by spaces, like:
This is dependent on the list of packages installed, of course.
Steps that worked for me on Ubuntu 8.04.2 to remove postgres 8.3
List All Postgres related packages
Remove all above listed
Remove the following folders
Remove the postgres user:
One command to completely remove postgresql in terminal is sudo apt-get —purge remove postgresql\* . Please note that this command will remove postgresql and all it’s compenents.
Follow the commands:
- sudo apt-get —purge remove postgresql
List all postgres related packages:
- dpkg -l | grep postgres
remove all the above listed packages using the command :
- apt-get —purge remove package1 package2 ..
Confirm all the files and folders related to postgres/postgresql are deleted using the command :
- whereis postgres
- whereis postgresql
Remove all the files and folders listed using rm command.
Delete the user postgres using the command :
- userdel -f postgres
Thanks to Code Friendly , & I want to share how I solved my problem.
When I updated postgresql from the Synaptic application, it is the postgresql 10 version that was installed. So I had two versions of postgresql (10 & 9.6) installed in my debian machine. Postgresql 9.6 listening on port 5432 . Postgresql 10 listening on port 5433 instead of 5432.
When I run the comand msfconsole in a terminal, although metasploit connects to the msf database on port 5432, the following error message appears:
I unistall the 9.6 postgresql version from the Synaptic application, but the problem persists (postgresql 9.6 no longer appears in synaptic’s installed software list);
But by executing the command that follows we see that the version postgresql 9.6 was not completely unistalled:
With the following command, postgresql-9.6 uninstalled completely:
root@kali:
# sudo apt-get —purge remove postgresql-9.6
Then I edited the file /etc/postgresql/10/main/postgresql.conf , changed the port number to 5432 and the problem is solved.
Another error message appears:
I found that the cause was that two (2) versions of Ruby are installed in my debian machine, versions (2.2 & 2.3).
Same thing, I uninstall the ruby 2.2 version from the synaptic application and the problem is solved, metasploit starts without problems.