MongoDB commands in linux console with --eval (print

Question

I try run command mongo in linux console without entering into mongo shell. To do it:

[root@router-mongos ~]# mongo --eval " printjson(show databases)"

But not run, this is the output:

MongoDB shell version: 2.6.10 connecting to: test 2015-06-10T18:33:39.834+0200 SyntaxError: Unexpected identifier

Though if you are uses:

[root@router-mongos ~]# mongo maria --eval " printjson (db.stats())" o mongo --eval " printjson(db.adminCommand('listDatabases'))"

Yes, the output is the same if you run it in shell.

Has anyone ever used this? can we help me? Thanks.

mwfearnley · Accepted Answer · 2023-08-01 14:16:03Z

3

From the Mongo Shell documentation:

You cannot use any shell helper (e.g. use <dbname>, show dbs, etc.) inside the JavaScript file because they are not valid JavaScript.

Following that, there is a table showing the JavaScript equivalents of the various shell helpers. From that, show dbs and show databases should be replaced by db.adminCommand('listDatabases') in your Mongo shell scripts.

edited Aug 1, 2023 at 14:16

mwfearnley

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answered Jun 10, 2015 at 17:19

Sylvain Leroux

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