Then manually install it. For example for version 1.22.2 (the version is just for demoing purposes – I grabbed the top one available in the list):
mv pgadmin3-1.22.2.tar.gz /usr/local/src
tar –zxvf pgadmin3-1.22.2.tar.gz
Then you would need to configure your server to allow remote user access of the database using pgadmin. Two config files would need to be modified:
Open up the postgresql.conf configuration file. Do a search or find for the phrase ‘listen_addresses’ without quotes. In order to open the access up to all IP addresses change the value to a *. The default is set to ‘localhost’ which does not allow connection from remote computers.
Next open the pg_hba.conf configuration file. Scroll down to the bottom of the file to the section marked # IPv4 local connections. Add in the following code on its own line, just underneath the 127.0.0.1/32 line necessary for ‘localhost’.
host all all youripaddress/32 trust
This will allow for local access of the database server to the computer with the IP address you specified. To add additional remote computers simply add a new line with their appropriate IP address.
Now that your configuration is complete restart the PostgreSQL database server for the changes to take effect.