Allowing other host to connect to postgresql-9.1 and restart services in postgresql-9.1

We need to add few Ip address in our pg_hba.conf file so that some new servers can connect to our postgresql database. We did the changes to pg_hba.conf like below old pg_hba.conf # TYPE DATABASE USER ADDRESS METHOD # "local" is for Unix domain socket connections only local all all trust # IPv4 local connections: host all all 127.0.0.1/32 password host all all 10.150.0.0/16 password host all all 10.156.14.0/23 password New Ips to be added to pg_hba.conf 10.24.8.1 10.150.256.170 10.150.256.133 We had done the changes to pg_hba.conf and added entries like below(we directly added IP address without /16 or /32) New pg_hba.conf # TYPE DATABASE USER ADDRESS METHOD # "local" is for Unix domain socket connections only local all all trust # IPv4 local connections: host all all 127.0.0.1/32 password host all all 10.150.0.0/16 password host all all 10.156.14.0/23 password host all all 10.24.8.1 password host all all 10.150.256.170 password host all all 10.150.256.133 password Now, we need to restart the postgresql-9.1 server. I tried the below commands but nothing worked. postgres:~> service status postgresql-9.1 Absolute path to 'service' is '/sbin/service', so it might be intended to be run only by user with superuser privileges (eg. root). -bash: service: command not found postgres:~> service postgresql-9.1 status Absolute path to 'service' is '/sbin/service', so it might be intended to be run only by user with superuser privileges (eg. root). -bash: service: command not found postgres:~> systemctl status postgresql-9.4 If 'systemctl' is not a typo you can run the following command to lookup the package that contains the binary: command-not-found systemctl -bash: systemctl: command not found This is the server info having postgresql-9.1 installed postgres:~> uname -a Linux camboxtest1 3.0.101-108.87-default #1 SMP Fri Feb 22 16:42:57 UTC 2019 (10e85a8) x86_64 x86_64 x86_64 GNU/Linux Did i add the IP address in right format ? What will be the command to restart the postgresql-9.1 services?