postgresql服务器版本和psql版本不一致解决办法

$ psql -U peimsmdata -h 127.0.0.1 peimsm

could not change directory to "/root"

Password for user peimsmdata:

psql (9.2.23, server 9.6.3)

WARNING: psql version 9.2, server version 9.6.

Some psql features might not work.

Type "help" for help.

原因：

虽然系统安装了9.6版本的pgsql，但是psql这个脚本却引用了旧的版本。

解决方法：

替换系统中旧版本的psql脚本为新的版本。

$ psql --version

could not change directory to "/root"

psql (PostgreSQL) 9.2.23

# which -a psql

/usr/bin/psql

/usr/local/postgresql/bin/psql

/bin/psql

# mv /usr/bin/psql /usr/bin/psql.bak

# ln -s /usr/local/postgresql/bin/psql /usr/bin/psql

$ psql -U peimsmdata -h 127.0.0.1 peimsm

could not change directory to "/root": Permission denied

Password for user peimsmdata:

psql (9.6.3)

Type "help" for help.