# best practice: linux
nano ~/.pgpass
*:5432:*:username:password
chmod 0600 ~/.pgpass

# best practice: windows
edit %APPDATA%\postgresql\pgpass.conf
*:5432:*:username:password

# linux
PGPASSWORD="password" pg_dump -h host -p port -U username database > file.sql

# windows
PGPASSWORD=password&& pg_dump -h host -p port -U username database > file.sql

# alternative
pg_dump --dbname=postgresql://username:password@host:port/database > file.sql

# restore
psql -U postgres database < file.sql

# backup and restore
PGPASSWORD=password && pg_dump -h 127.0.0.1 -p 5432 -U username database > tmp.sql
psql -U postgres -d database -c "drop schema public cascade; create schema public;"
psql -U postgres -d database -1 -f tmp.sql
rm tmp.sql