Configuring Username and Password in PostgreSQL

Question

I have just reset my password in psql by editing my pg_hba.conf file to

local  all  all  trust

before changing it back to

local  all  all  md5

after. After doing this I tried to restart the psql server but I found that I have no access to any the server through the pg_ctl commands, for example if I try:

pg_ctl -D /Library/PostgreSQL/9.6/data restart

The reply is:

pg_ctl: could not open PID file 
"/Library/PostgreSQL/9.6/data/postmaster.pid": Permission denied 

The only way that I'm able to open psql is with this command:

 psql -U postgres

Because if I try just 'psql', the response is the following:

psql: FATAL:  role "robertosullivan" does not exist

I need to find some way of connecting to psql with my username and my new password so that I can use psql with my app in Rails.

Any advice would be much appreciated, thanks.

Answer 1

First of all, "robertosullivan" does not exist. Which means that you have configured your PG with a user account that simply isn't there. Seems like the easiest way around this would be to create the user like so:

sudo -u postgres createuser robertosullivan -s
sudo -u postgres psql
postgres=# \password your-password

Answer 2

以下查询可能对您有帮助

psql -h localhost -U postgres -d postgres