Warning: the "mongo" shell has been superseded by "mongosh"

安装mongodb后，使用mongo登录，发现给出以下提示：

$ mongo
MongoDB shell version v5.0.7
connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb
Implicit session: session { "id" : UUID("eddecffd-581c-4701-8017-73f5a1a0e162") }
MongoDB server version: 5.0.7
================
Warning: the "mongo" shell has been superseded by "mongosh",
which delivers improved usability and compatibility.The "mongo" shell has been deprecated and will be removed in an upcoming release.
For installation instructions, see
https://docs.mongodb.com/mongodb-shell/install/
================

从MongoDB 4.0开始，可以使用MongoDB Shell连接MongoDB。

使用rpm方式安装mongosh

# vi /etc/yum.repos.d/mongodb-org-5.0.repo
[mongodb-org-5.0]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/5.0/$basearch/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-5.0.asc

然后安装

sudo yum install -y mongodb-mongosh

可以直接下载rpm软件包

https://repo.mongodb.org/yum/redhat/7Server/mongodb-org/5.0/x86_64/RPMS/mongodb-mongosh-1.3.1.el7.x86_64.rpm

连接示例：

mongosh
mongosh "mongodb://localhost:28015"
mongosh "mongodb://mongodb0.example.com:28015"
mongosh "mongodb://mongodb0.example.com.local:27017,mongodb1.example.com.local:27017,mongodb2.example.com.local:27017/?replicaSet=replA"

或者下载tgz格式的安装包进行安装

tar -zxvf mongosh-1.3.1-linux-x64.tgz