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For npm command to work, its recommended to install nodejs plugin.

Installing nodejs plugin:

https://wiki.jenkins.io/display/JENKINS/NodeJS+Plugin

Manage Jenkins

 

But sometimes even after the plugin is installed, npm command doesn’t work and shows an error. To resolve this, add the path

 

 

+ echo /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/lib/jvm/java-1.8-openjdk/jre/bin:/usr/lib/jvm/java-1.8-openjdk/bin
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/lib/jvm/java-1.8-openjdk/jre/bin:/usr/lib/jvm/java-1.8-openjdk/bin
+ node -v
v6.10.3
+ npm -v
/tmp/jenkins5796057968635450386.sh: line 1: npm: not found
Build step ‘Execute shell’ marked build as failure
Finished: FAILURE

For this failure, please update the path to bin folder explicitly like below.

 

Then run the build job again and it should succeed.