postgresql报错:

　　psql: could not connect to server: No such file or directory         Is the server running locally and accepting         connections on Unix domain socket "/tmp/.s.PGSQL.5432"?

1.可能是服务没启动，以下3中启动方式：

　　（1） postmaster -D /usr/local/pgsql/data/　　（注意：这里的/usr/local/pgsql/data/ 是你的postgresql安装路径）

　　（2）postmaster -D /usr/local/pgsql/data/ > logfile 2>&1 &

　　（3）pg_ctl start -D /usr/local/pgsql/data/

2.可能是系统环境没加psql:

　　用which psql回车找到psql路径，用echo $PATH查看PATH中有没有psql路径，没有的话就添加：方法如下：http://www.cnblogs.com/nightswatch/articles/4439776.html

3.还有问题的话：移步http://stackoverflow.com/questions/12472988/postgresql-error-could-not-connect-to-server-no-such-file-or-directory

　　

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