In this post i share with you the Road Map of our most recent project SwapN>Go P2P Crypto Exchange.
tar -zcvf archive-name.tar.gz directory-name
So lets say you have lots of wallets in a server for like 8 different cryptocurrencys if you have limited space, this is problem because the blockchains never stop growing but the space amount is defined.
Now you add another drive to the setup and you want to migrate some of the wallets into the new drive to release some space in the other drive. this is how you do that.