Problhma me environment variables

[Tsial-b]

Katarxin xronia polla kai kalh xronia.

Exw to ekseis problhma.
Exw suse 10.1. Exw stisei thn postgresql. Thelw na balw sto PATH to \bin 
apo thn postgresql.
Pws to kanw auto? thelw na to blepoun oloi oi users.
Mia dokimh pou ekana htan na balw sto telos apo to /etc/profile
PATH=/usr/local/pgsql/bin
export PATH

alla mou emfanizete kapoio minima lathous otan pataw su. Mou bgazei 
shell-init: error retrieving current directory: getcwd: cannot access 
parent directories: No such file or directory.

An kanw export PATH=/usr/local/pgsql/bin. tote auta pou eixe hdh sto 
path tha ta kratisei kai aplws tha prosthesei to kainourgio directory h 
tha ta antikatastisei me to neo directory?