[GENERAL] Recover PostgreSQL database folder data

Hi,
There was a disaster in my development note. I was able to recover the
data folder. PostgreSQL 9.6.2, was installed in Centos 7.

Here are the procedures I'm trying to initialize Postgresql for me to do
a backup.

1- I installed PostgreSQL 9.6.2 on a VM with Centos 7.
2- I stopped the PostgreSQL service: sudo systemctl stop postgresql-9.6
3- I renamed the /var/lib/pgsql/9.6/data folder to date data_old and
copied the old date folder
4- I gave permission in the folder date:
      sudo chown postgres: postgres /var/lib/pgsql/9.6/data;
      sudo chmod 700 /var/lib/pgsql/9.6/data
5 - I tried to start the service: sudo systemctl start postgresql-9.6
It is generating the following errors:

Abr 21 01:25:35 localhost.localdomain systemd[1]: Starting PostgreSQL
9.6 database server...
Abr 21 01:25:36 localhost.localdomain postgresql96-check-db-dir[19996]:
cat: /var/lib/pgsql/9.6/data//PG_VER…ada
Abr 21 01:25:36 localhost.localdomain postgresql96-check-db-dir[19996]:
cat: /var/lib/pgsql/9.6/data//PG_VER…ada
Abr 21 01:25:36 localhost.localdomain systemd[1]:
postgresql-9.6.service: control process exited, code=ex...us=1
Abr 21 01:25:36 localhost.localdomain systemd[1]: Failed to start
PostgreSQL 9.6 database server.
Abr 21 01:25:36 localhost.localdomain systemd[1]: Unit
postgresql-9.6.service entered failed state.
Abr 21 01:25:36 localhost.localdomain systemd[1]: postgresql-9.6.service
failed.
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