Postgresql -bash: psql: command not found

It can be due to psql not being in PATH

$ locate psql
/usr/lib/postgresql/9.6/bin/psql

Then create a link in /usr/bin

ln -s /usr/lib/postgresql/9.6/bin/psql /usr/bin/psql

Then try to execute psql it should work.

The question is for linux but I had the same issue with git bash on my Windows machine.

My pqsql is installed here: C:\Program Files\PostgreSQL\10\bin\psql.exe

You can add the location of psql.exe to your Path environment variable as shown in this screenshot:

After changing the above, please close all cmd and/or bash windows, and re-open them (as mentioned in the comments @Ayush Shankar)

You might need to change default logging user using below command.

psql -U postgres

Here postgres is the username. Without -U, it will pick the windows loggedin user.

In case you are running it on Fedora or CentOS, this is what worked for me (PostgreSQL 9.6):

In terminal:

$ sudo visudo -f /etc/sudoers

modify the following text from:

Defaults    secure_path = /sbin:/bin:/usr/sbin:/usr/bin

to

Defaults    secure_path = /sbin:/bin:/usr/sbin:/usr/bin:/usr/pgsql-9.6/bin

exit, then:

$ printenv PATH

$ sudo su postgres

$ psql

To exit postgreSQL terminal, you need to digit:

$ \q

Source: https://serverfault.com/questions/541847/why-doesnt-sudo-know-where-psql-is#comment623883_541880

Check if PostgreSQL is installed or not.

If not you can do the same in ubuntu using this command.

sudo apt update
sudo apt install postgresql postgresql-contrib

there must be two reasons for this either the package is not install or psql is not defined in the PATH

the simple way is to create a link within the /usr/bin or /usr/local/sbin/

First find the the file

sudo find / -name psql

then create soft link

sudo ln -sf /opt/pgpro/1c-14/bin/psql /usr/local/sbin/psql