如何在fedora postgresql中初始化initdb

我是使用rpm软件包在Fedora20上安装postgresql的。我手动下载了postgres所需的软件包。这些软件包如下：

libxslt-1.1.28-5.fc20.x86_64.rpm postgresql-9.3.1-2.fc20.x86_64.rpm postgresql93-9.3.4-1PGDG.f20.x86_64.rpm postgresql93-contrib-9.3.4-1PGDG.f20.x86_64.rpm postgresql93-libs-9.3.4-1PGDG.f20.x86_64.rpm postgresql93-server-9.3.4-1PGDG.f20.x86_64.rpm postgresql-libs-9.3.1-2.fc20.x86_64.rpm uuid-1.6.2-26.el7.x86_64.rpm

我是这样安装这些软件包的

[root@fedorarpmpostgres ~]# rpm -ivh libxslt-1.1.28-5.fc20.x86_64.rpm 

输出

Preparing...                          ################################# [100%]

    package libxslt-1.1.28-5.fc20.x86_64 is already installed

so its already installed ok now i'm successfull in stalling all this packages. now how can i 
install initdb

i  tried like this way but i got this error.

[root@fedorarpmpostgres ~]# /usr/pgsql-9.3/bin/initdb --encoding=UTF8 --

输出：

pgdata=/var/lib/pgsql/9.3/data/

initdb: cannot be run as root


Please log in (using, e.g., "su") as the (unprivileged) user that will
own the server process.

我要告诉你的一件事是，我通过yum成功安装了postgres，但我只需要像上面那样通过rpm安装postgres

有谁能帮我初始化initdb吗

---

谢谢。

对于您的root用户，如果您尚未设置postgres用户密码（默认情况下未设置），请执行su postgres，您应该能够执行initdb