postgresql service找不到以及psql找不到，为什么？小白求答

系统是deepin15，安装postgresql12

这是我/home/postgres/.bash_profile

我是按照这篇文章进行配置的

https://www.cnblogs.com/acker-ploy/p/11978953.html

但是

root@chen-PC:/# service postgresql start
Failed to start postgresql.service: Unit postgresql.service not found.

然后进入postgres用户

root@chen-PC:/# su - postgres
$ psql
-su: 1: psql: not found
$ 

/usr/local/postgresql/bin

clusterdb   logfile        pg_ctl          pg_restore      postmaster
createdb    pg_archivecleanup  pg_dump         pg_rewind       psql
createuser  pg_basebackup      pg_dumpall      pg_test_fsync   reindexdb
dropdb      pgbench        pg_isready      pg_test_timing  vacuumdb
dropuser    pg_checksums       pg_receivewal   pg_upgrade
ecpg        pg_config          pg_recvlogical  pg_waldump
initdb      pg_controldata     pg_resetwal     postgres

问题出在哪里啊？两天了还没有搞清楚，网上也没有相同的情况！！！求求各位大佬

https://blog.csdn.net/u013517229/article/details/104768307/

http://suo.im/6tp2qY