设置环境变量：
export PG_HOME=/www/server/pgsql
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/www/server/pgsql/lib
export PG_CONFIG=/www/server/pgsql/bin/pg_config
export PGDATA=/www/server/pgsql/data
PATH=$PATH:$HOME/.local/bin:$HOME/bin:$PG_HOME/bin
alias psql='/www/server/pgsql/bin/psql'
