MongoDB How to view version information in detail

In summary 1, how to view MongoDB version information

1: Connect to MongoDB and use the command to view.

> db.version();
4.0.0
> 

2: mongo command to view

The relative path uses the mongo command

# ./mongo --version
MongoDB shell version v4.0.0
git version: 3b07af3d4f471ae89e8186d33bbb1d5259597d51
OpenSSL version: OpenSSL 1.0.1e-fips 11 Feb 2013
allocator: tcmalloc
modules: none
build environment:
 distmod: rhel62
 distarch: x86_64
 target_arch: x86_64

Or use an absolute path

# /usr/local/mongodb/bin/mongo --version

3: Use mongod to view

# ./mongod --version
db version v4.0.0
git version: 3b07af3d4f471ae89e8186d33bbb1d5259597d51
OpenSSL version: OpenSSL 1.0.1e-fips 11 Feb 2013
allocator: tcmalloc
modules: none
build environment:
  distmod: rhel62
  distarch: x86_64
  target_arch: x86_64

About the difference between mongo and mongod

mongod is the main process that handles MongoDB systems. It handles data requests, manages data stores, and performs back-end administrative operations. When we run the mongod command, it means we are starting the MongoDB process and running it in the background.

ES32en is a command-line utility used to connect to a specific instance of ES33en. When we run the mongo command with no arguments it will use the default port number and localhost connection

conclusion