SQL

psql: FATAL: Ident authentication failed for user "postgres"

$ sudo -u postgres psql
password
Enter password: ...
...

password authentication failed for user postgres

# It's fairly simple to solve:
# follow this step:

# go to etc/postgresql/14/main --(assuming your version is 14)
# open terminal in this folder and type
# if nano not installed install first.. it's so good.

sudo nano pg_hba.conf 

# repalce all method from peer/md5/ to trust like this

local all  all			  		trust
local all  all 			  		trust
host  all  all 	127.0.0.1/32 	trust
host  all  all 	a::1/128 		trust

ctrl + s
ctrl + x

# then run 

sudo service postgresql restart

# then type

sudo -u postgres psql

# after that, type

ALTER USER postgres WITH PASSWORD 'postgres'

# now exit out of it by typing 

q

# now run again

sudo service postgresql restart


# That's all you have to do, congrats, everything will work now.