I am using Putty via a VPS. I have my wallet set up and can mine using start_mining. I know how to access my wallet using ./monero-wallet-cli. What I don't know is the command to use to connect to one of the pools out there. Any help would be appreciated.
If you want to join a specific pool for example monerol.com, you can go to its getting started page which is http://monerol.com/#getting_started
As you can see there are many ways to connect to the pool just select the mining app of your choice. Normally, a VPS does not have GPU so select the one that support CPU mining. For example you can use minerd like this
minerd -a cryptonight -o stratum+tcp://monerol.com:3333 -u YOUR_WALLET_ADDRESS -p x
You can install minerd by downloading and compiling it. The source is at https://github.com/wolf9466/cpuminer-multi
Edit: Another miner which is good is called xmr-stak-cpu you can get its source code here https://github.com/fireice-uk/xmr-stak-cpu
Hope this helps.