PostgreSQL-数据目录与pg_ctl

# tail /etc/profile
PATH="$PATH":/usr/lib/postgresql/9.2/bin/
export PATH
export PGDATA=/var/lib/postgresql/9.2/main
export PGDATABASE=yun
export PGUSER=chen
export PGHOST=127.0.0.1

# su - postgres
$ pg_ctl status
pg_ctl: 正在运行服务器进程(PID: 4954)
/usr/lib/postgresql/9.2/bin/postgres "-D" "/var/lib/postgresql/9.2/main" "-c" "config_file=/etc/postgresql/9.2/main/postgresql.conf"

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