postgreSQL but could not open file pg_control: No such file or directory

but could not open file pg_control: No such file or directory


postgres@vultr:~/10/main/global$ pg_ctl start -D $PGDATA
waiting for server to start....postgres: could not find the database system
Expected to find it in the directory "/var/lib/postgresql/10/main",
but could not open file "/var/lib/postgresql/10/main/global/pg_control": No such file or directory
 stopped waiting
pg_ctl: could not start server
Examine the log output.