scan and print all keys redis shell

C++
KEYS *# From shell
redis-cli --raw keys "KeyPrefix*" 
# or
redis-cli --scan --pattern "KeyPrefix*" #From shell
redis-cli --raw keys "KeyPrefix*" | xargs redis-cli GET
# or
redis-cli --scan --pattern "KeyPrefix*" | xargs redis-cli GET
Source

Also in C++: