Re: Switching from 9.1 to 9.5 on Ubuntu 16.04

Mike,

>createdb --port=5432 --host=pq4 --template=template0 --encoding=UTF8
--lc-collate=C --lc-ctype=C --username=miked --owner=miked train

Is the dbname specified

>mike(at)pq4:~$
>mike(at)pq4:~$ sudo -u postgres /usr/lib/postgresql/9.1/bin/pg_ctl -D
"/var/lib/postgresql/9.1/main" status
could not change directory to "/home/mike"
>pg_ctl: server is running (PID: 4993)
>/usr/lib/postgresql/9.1/bin/postgres "-D" "/var/lib/postgresql/9.1/main"
"-c" "config_file=/etc/postgresql/9.1/main/postgresql.conf"

Why is Postgres 9.1 is in running state? Your requirement is to disable 9.1
& enable 9.5 right??

And if could you provide me on the below info?

1) Is the backup for the required database taken from the instance 9.1 and
stored in the same server?

2) If yes then stop 9.1 server and make sure only postgres 9.5 is in active
state(you can do this as "su postgres" user)

3) Ensure the active listening postgres ports on the server by:
netstat -alp | grep "5432"

4) Later as same "su postgres user" provide the connection string like
below:
/usr/lib/postgresql/9.5/bin/psql -d postgres -U miked -p
5432

5) Now issue select version()(It should be Postgres 9.5)

6) If Postgres 9.5 issue create database dbname

7) Restore the taken backup into the newly created database.

I think this should suffice. Any misinterpretations on my side could be
corrected.

Regards,
Pavan

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