How did I fix «could not change directory to "…": Permission denied» for PostgreSQL in Ubuntu?

[dmitrii_fediuk]

• stackoverflow.com/questions/35782366
• stackoverflow.com/questions/38470952
• askubuntu.com/questions/1477238
• dba.stackexchange.com/questions/229029
• serverfault.com/questions/1031878
• dba.stackexchange.com/questions/328989
• serverfault.com/questions/718176

[dmitrii_fediuk]

Step 1

stat -c "%G" .

How to find out via a Linux command line which group owns a folder?

Step 2

sudo usermod -aG <the group from the step 1> postgres

In my case:

sudo usermod -aG dfediuk postgres

unix.stackexchange.com/a

Result