Managing multiple versions of node with NVM

First, use the following command to install the NVM

$ curl-o-https://raw.githubusercontent.com/creationix/nvm/v0.33.2/install.sh | Bash

When the download and installation is complete, the user exits the login or source the environment variable again.

$ . ~/.bashrc

View current system node version

$ NVM ls
            n/a
node-> stable (-> N/a) (default)
Iojs-> N/A (default)

You can see that no version of node is currently installed in the system

Install the specified version of node using "NVM Install"

$ NVM Install v6.10.0
Downloading and installing node v6.10.0 ...
Downloading https://nodejs.org/dist/v6.10.0/node-v6.10.0-linux-x64.tar.gz
... ######################################################################## 100.0%
Computing checksum with Sha256sum
checksums matched!
Now using node v6.10.0 (NPM v3.10.10)
Creating default Alias:default-> v6.10.0

$ nvm install v7.10.0
down Loading and installing node v7.10.0
... Downloading https://nodejs.org/dist/v7.10.0/node-v7.10.0-linux-x64.tar.gz
... ######################################################################## 100.0%
Computing checksum with Sha256sum
checksums matched!
Now using node v7.10.0 (NPM v4.2.0)

View node version information again

$ NVM List
        v6.10.0
->      v7.10.0
default-> v6.10.0
node-> stable (-> v7.10.0) (default) C5/>stable-> 7.10 (-> v7.10.0) (default)
Iojs-> N/A (default)
lts/*->-Lts/boron (->/n) lts
/argon-> v4.8.3 (-> N/a)
Lts/boron->-v6.10.3 (-> N/a)

There are now two versions of node, where "-> v7.10.0" describes the v7.10.0 version currently in use.

$ node-v
v7.10.0

$ nvm current
v7.10.0

You can now switch the node version using NVM use, such as:

$ NVM Use v6.10.0 now
using node v6.10.0 (NPM v3.10.10)

After switching, view the node version information "-> v6.10.0" to describe the v6.10.0 version currently in use.

$ NVM List
->      v6.10.0
        v7.10.0
default-> v6.10.0
node-> stable (-> v7.10.0) (default) C5/>stable-> 7.10 (-> v7.10.0) (default)
Iojs-> N/A (default)
lts/*->-Lts/boron (->/n) lts
/argon-> v4.8.3 (-> N/a)
Lts/boron->-v6.10.3 (-> N/a)

$ node-v
v6.10.0

$ nvm current
v6.10.0

Finally, if you want to set the default node version of the system user, you can use NVM alias default to set it.

$ NVM alias default v7.10.0
default-> v7.10.0

$ nvm ls
->      v6.10.0
        v7.10.0
Default  -> v7.10.0
Node-> stable (-> v7.10.0) (default)
stable-> 7.10 (-> v7.10.0) (default)
Iojs -> N/A (default)
lts/*-> Lts/boron (-> N/a)
Lts/argon-> v4.8.3 (-> N/a)
Lts/boron-> V 6.10.3 (-> N/a)