Run bash command on jenkins pipeline

Question

Inside a groovy script  for a jenkins pipeline   How can I run a bash command instead of a sh command   I have tried the following   Call     bin bash  inside the sh call   stage  Setting the variables values         steps            sh                    bin bash             echo  hello world                         Replace the sh call with a bash call    stage  Setting the variables values         steps            bash                    bin bash             echo  hello world                         Additional Info   My command is more complex than a echo hello world

User · Accepted Answer

The Groovy script you provided is formatting the first line as a blank line in the resultant script. The shebang, telling the script to run with /bin/bash instead of /bin/sh, needs to be on the first line of the file or it will be ignored.

So instead, you should format your Groovy like this:

stage('Setting the variables values') {
    steps {
         sh '''#!/bin/bash
                 echo "hello world" 
         '''
    }
}

And it will execute with /bin/bash.

User · Answer

For multi-line shell scripts or those run multiple times  I would create a new bash script file  starting from    bin bash   and simply run it with sh from Jenkinsfile    sh  chmod  x   script sh  sh    script sh

User · Answer

According to this document  you should be able to do it like so   node       sh     bin bash  n             echo   Hello from   SHELL

User · Answer

I m sure that the above answers work perfectly  However  I had the difficulty of adding the double quotes as my bash lines where closer to 100  So  the following way helped me   In a nutshell  no double quotes around each line of the shell   Also  when I had  bash       bin bash  within steps  I got the following error java lang NoSuchMethodError  No such DSL method    bash    found among steps  pipeline       agent none      stages            stage   Hello                 agent any              steps                   echo  Hello                     sh       bin bash                      echo  Hello from bash                      echo  Who I m  SHELL                                                        The result of the above execution is

User · Answer

If you want to change your default shell to bash for all projects on Jenkins  you can do so in the Jenkins config through the web portal   Manage Jenkins   Configure System  Skip this clicking if you want by just going to https    YOUR JENKINS URL  configure    Fill in the field marked  Shell executable  with the value  bin bash and click  Save

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