Which subcommand adds a peer to a channel in Hyperledger Fabric?

In Hyperledger Fabric, the correct subcommand to add a peer to a channel is peer channel join. This

command is used by a peer node to join an existing channel. The command requires a block to be

specified which typically is the genesis block of the channel, allowing the peer to synchronize with

the channel's ledger from the beginning. Other commands like peer channel fetch, peer channel

create, and peer channel update serve different purposes. peer channel fetch retrieves blocks from a

channel, peer channel create is used to set up a new channel, and peer channel update modifies

channel settings. Thus, peer channel join is the specific command used to connect a peer to a

channel​​.