ipfs:tldr:81ee5

The command "ipfs pin add ${hash}" is a command used in the IPFS (InterPlanetary File System) to add a hash to the pin set, thus keeping the corresponding content from being garbage collected.

Here's a breakdown of the command:

• "ipfs": It is the command-line interface (CLI) tool for interacting with the IPFS network.
• "pin": It is a subcommand used to manage pinning operations in IPFS.
• "add": It specifies that we want to add a new item to the pin set.
• "${hash}": It is the hash or CID (Content Identifier) of the content that we want to add to the pin set. It should be replaced with the actual hash value.

In IPFS, content is identified using a unique hash. By adding a hash to the pin set, IPFS ensures that the corresponding content stays available in the network even if it is not directly being used. Pinning prevents the content from being garbage collected, which could happen over time if it is not actively accessed or pinned.

Pinning is useful for keeping important and frequently accessed content within the IPFS network, ensuring its availability and increased redundancy.