Questions[jenkins](ubuntu)

I have Ubuntu 20.04 and Jenkins 1.3.3 I need to change the local Jenkins port from 8080 to 8888.

I tried to change the config file sudo gedit /etc/default/jenkins in the string

#port for HTTP connector (default 8080; disable with -1)
HTTP_PORT=8888

After restart service: sudo service jenkins start it doesn't affect changes. I still visit jenkins with 8080 port.

Also in this config file I add additional string: JENKINS_ARGS="--httpPort=$HTTP_PORT" but unfortunately after restart service the same - 8080.

I tried to change the address via web interface in the Manage Jenkins next Configure System next change string Jenkins URL to http://0.0.0.0:8888/ and apply and restart service. I visited page http://0.0.0.0:8080/cli/command/who-am-i and have got next features:

java -jar jenkins-cli.jar -s http://0.0.0.0:8888/ -webSocket who-am-i
Reports your credential and permissions.

So changes are saved but doesn't affect. I tried to restart my PC to initial all changes. Can You help me? Any suggestions?

The below is my Jenkins Pipeline stage

stage ('Import') {

            steps {
                sshagent([sshCredentials]) {
                    sh '''
                        #!/bin/bash
                        sh -x ETL_AUTOMATION/Scripts/export.sh
                    '''

Build output:-

[[ RMO_TST12 ==  ]]

ETL_AUTOMATION/Scripts/export.sh: 17: ETL_AUTOMATION/Scripts/export.sh: [[: not found

if condition in script:-

if [[ "$SOURCE_FOLDER" == "" ]]; then

    echo "SOURCE_FOLDER not specified... exiting"
    exit 1
fi

I have mentioned #!/bin/bash in my script also.

Please help me, I am really stuck here.

I tried to install latest stable Jenkins version which supports Java 11. So after installing Java 11(JDK) I got the error from Jenkins that incorrect java version was found.

So uninstalled the Java 11 and tried to install Java 8. While installing java 8, the Jenkins messages incorrect java version repeatedly was coming. So I completely removed both Java 11(JDK) and Java 8(JDK) and made sure no folders are there in /usr/bin and /usr/lib/jvm for both java 11 and java 8. When I installed java 8 the system says JDK 8 installed but im not able to find any java version in my system. Why?

1. How to set up the JDK 8 for the Jenkins and make it working? Where to find java version?
2. How to remove Jenkins completely from the system if I need to install everything from scratch? Or any way to reset the Linux to a previous state (before java and Jenkins installed)
3. How to have/maintain both JDK8 and JDK11 in the system?

I want to list all users in jenkins, via the console script that jenkins has.

So far I managed to list all the users using this:

import hudson.model.User   
User.getAll().each { user ->   
   println user}

but they are listed by the first and last name, which I don't need...

I would like to list them by their user IDs, can you give me a hand?

I looked through the documentation but I fail to understand how to use it the right way. I'm not so experimented with groovy scripting..

Any ideas? Thank you!

My jenkins looks like corrupted. After installing older version I tried to upgrade. When I tried

wget -q -O - http://pkg.jenkins-ci.org/debian/jenkins-ci.org.key | sudo apt-key add -
sudo sh -c 'echo deb http://pkg.jenkins-ci.org/debian binary/ > /etc/apt/sources.list.d/jenkins.list'
sudo apt-get update
sudo apt-get install jenkins

It was failed to upgrade. Then I removed jenkins using

sudo apt-get remove jenkins

And again I tried to install.It is giving

    Reading package lists... Done
Building dependency tree       
Reading state information... Done
jenkins is already the newest version.
The following packages were automatically installed and are no longer required:
  libjna-java libhttpcore-java libxbean-java libargs4j-java libhttpclient-java
  libplexus-build-api-java libbackport-util-concurrent-java
  libplexus-utils-java libjffi-java libjffi-jni
  libmaven-common-artifact-filters-java libjsr305-java libcommons-jexl-java
  libplexus-bsh-factory-java libplexus-container-default-java
  libganymed-ssh2-java jenkins-cli libplexus-sec-dispatcher-java
  libcommons-net2-java libjsoup-java libmaven2-core-java libplexus-cipher-java
  libjenkins-remoting-java libeasymock-java libplexus-i18n-java
  libmaven-invoker-java libplexus-containers-java libjaffl-java libdoxia-java
  libmaven-dependency-tree-java libmodello-java libplexus-archiver-java
  libconstantine-java libmaven-scm-java libmaven-enforcer-plugin-java
  libplexus-io-java libwagon-java libcommons-vfs-java libanimal-sniffer-java
  libgoogle-collections-java libnetbeans-cvsclient-java
  libmaven-plugin-testing-java libplexus-classworlds-java libitext1-java
  libplexus-interactivity-api-java libcommons-jxpath-java jenkins-common
  libplexus-interpolation-java libclassworlds-java
  libcommons-configuration-java libjnr-posix-java libplexus-ant-factory-java
Use 'apt-get autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 513 not upgraded.

But service jenkins restart command throwing

jenkins: unrecognized service

Even http://localhost:8080/ not working.

I want to install from beginning . Any suggestions?

Edited:

I followed these steps :

sudo apt-get update && sudo apt-get dist-upgrade && sudo apt-get install -f && sudo apt-get autoremove

and then same above steps followed to install.

But still same error.Again I tried to remove package using

sudo apt-get remove jenkins && sudo apt-get install jenkins

This is part of output:

The following NEW packages will be installed:
  jenkins
0 upgraded, 1 newly installed, 0 to remove and 268 not upgraded.
Need to get 0 B/61.3 MB of archives.
After this operation, 67.4 MB of additional disk space will be used.
Selecting previously unselected package jenkins.
(Reading database ... 224579 files and directories currently installed.)
Unpacking jenkins (from .../archives/jenkins_1.557_all.deb) ...
Processing triggers for ureadahead ...
Setting up jenkins (1.557) ...

But still service not recognized.

One more thing I noticed is /etc/init.d/jenkins is empty.

Any other way to install same jenkins package?