Jenkins basics--Set admin login during configuration. The account password is required when accessing Jenkins for the second time or the solution is to forget the password.

Query account and set password

For Linux, you can view the article: Jenkins Basics--Installing Jenkins on Linux_Silly Fat Fish's Blog-CSDN Blog

1. Account query, open the installation directory of jenkins, mine is C:\ProgramData\Jenkins\.jenkins , then select users.xml under users, see the value of <entry><string>, this is your jenkins account

2. Password setting, open the jenkins installation directory, select the config.xml file in the admin directory under users, my file path is as follows: C:\ProgramData\Jenkins\.jenkins\users\file name \ config.xml

3. Find the passwordHash part and replace the original hash value.
Modify  #jbcrypt:$2a$10$QqzUz7kc8U8wkc5vexlxnuw5umudQj7A.0NmuZPrGMaq3qaV5m7hi to   #jbcrypt:$2a$10$DdaWzN64JgUtLdvxWIflcuQu2fgrrMSAMabF5TSrGK5 nXitqK9ZMS
The latter is the hash value of 111111, which means changing the original password to 111111

Restart the Jenkins service (for linux and windows, you can enter: ip:port number/restart in the browser)

Windows can also right-click My Computer, select Manage, find the Jenkins service and restart it

 Re-visit the Jenkins website, enter the account name, and the password is 111111 to log in successfully.