What is the default Jenkins password?

Question

I'm using a EC2 server instance. Used the following to install Jenkins:

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 

but I need to install software on the Jenkins server so in my EC2 instance I did

sudo –s –H –u jenkins 

to get into the jenkins server. Then I tried to do

sudo cabal install quickcheck 

but it prompted me for jenkins password. I've been searching around the internet for 4hrs now and nothing is helping me get administrative privilege in the jenkins server.

So I'm building my project using the following command in shell:

sudo cabal clean sudo cabal configure sudo cabal build sudo cabal install 

This is the error I'm getting:

 Started by timer Building in workspace /var/lib/jenkins/jobs/Finance/workspace Checkout:workspace / /var/lib/jenkins/jobs/Finance/workspace - hudson.remoting.LocalChannel@eea6dc Using strategy: Default Last Built Revision: Revision b638e2182dece0ef1a40232b1d75fa3ae5c01a5d (origin/master) Fetching changes from 1 remote Git repository Fetching upstream changes from origin Commencing build of Revision b638e2182dece0ef1a40232b1d75fa3ae5c01a5d (origin/master) Checking out Revision b638e2182dece0ef1a40232b1d75fa3ae5c01a5d (origin/master) [workspace] $ /bin/sh -xe /tmp/hudson3500373817395137440.sh + sudo cabal clean sudo: no tty present and no askpass program specified Sorry, try again. sudo: no tty present and no askpass program specified Sorry, try again. sudo: no tty present and no askpass program specified Sorry, try again. sudo: 3 incorrect password attempts Build step 'Execute shell' marked build as failure Sending e-mails to: ***@gmail.com ERROR: Could not connect to SMTP host: localhost, port: 25 javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25;   nested exception is:     java.net.ConnectException: Connection refused     at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1934)     at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:638)     at javax.mail.Service.connect(Service.java:295)     at javax.mail.Service.connect(Service.java:176)     at javax.mail.Service.connect(Service.java:125)     at javax.mail.Transport.send0(Transport.java:194)     at javax.mail.Transport.send(Transport.java:124)     at hudson.tasks.MailSender.execute(MailSender.java:116)     at hudson.tasks.Mailer.perform(Mailer.java:117)     at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:19)     at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:814)     at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:786)     at hudson.model.Build$BuildExecution.post2(Build.java:183)     at hudson.model.AbstractBuild$AbstractBuildExecution.post(AbstractBuild.java:733)     at hudson.model.Run.execute(Run.java:1592)     at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)     at hudson.model.ResourceController.execute(ResourceController.java:88)     at hudson.model.Executor.run(Executor.java:237) Caused by: java.net.ConnectException: Connection refused     at java.net.PlainSocketImpl.socketConnect(Native Method)     at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)     at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)     at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)     at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391)     at java.net.Socket.connect(Socket.java:579)     at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:286)     at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:231)     at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1900)     ... 17 more Finished: FAILURE 

Answer 1

Here is how you can fix it:

• Stop Jenkins
• Go go edit /var/lib/jenkins/config.xml
• Change <useSecurity>true</useSecurity> to false
• Restart Jenkins: sudo service jenkins restart
• Navigate to the Jenkins dashboard to the "Configure Security" option you likely used before. This time, setup security the same as before, BUT set it to allow anyone to do anything, and allow user signup.
• Go to www.yoursite.com/securityRealm/addUser and create a user
• Then go change allow anyone to do anything to whatever you actually want users to be able to do. In my case, it is allow logged in users to do anything.

Answer 2

If you installed using apt-get in ubuntu 14.04, you will found the default password in /var/lib/jenkins/secrets/initialAdminPassword location.