I'd imagine you could do a shell script like this to iterate over different wallets in a file, list.txt:
list.txt:
WALLET_ID_1
WALLET_ID_2
WALLET_ID_3
balances.sh:
output_file="balances.txt"
while read line; do
balance=$(solana balance "$line")
echo "$line: $balance" >> "$output_file"
done < list.txt
This should output a file, balances.txt that looks something like this:
WALLET_ID_1: 1.181062312 SOL
WALLET_ID_2: 2.046516532 SOL
WALLET_ID_3: 3.84642558 SOL