How could I capture the console output into a variable when running a utility so I can filter the text?

Example: I am trying to capture the console output when I type bitcoind so that I can filter out the rpcpassword and write it to a config file.

ubuntu@ip-172-31-3-49:~$ bitcoind

Error: To use bitcoind, you must set a rpcpassword in the configuration file:

/home/ubuntu/.bitcoin/bitcoin.conf

It is recommended you use the following random password:

rpcuser=bitcoinrpc

rpcpassword=Eb5WDgzKqt77U4LhvvfnYxaNvw2rpztSvM5XKsonXBWC

(you do not need to remember this password)

The username and password MUST NOT be the same.

If the file does not exist, create it with owner-readable-only file permissions.

It is also recommended to set alertnotify so you are notified of problems;

for example: alertnotify=echo %s | mail -s "Bitcoin Alert" [email protected]