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docker exec -u 0 -it 8662ea2fa000 /bin/bash
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To change for the first time the admin password follow the following steps (docker version only)
Go to the Nexus container instance for example 91aefe723146
make a docker exec -it 91aefe723146 /bin/bash
Go to /nexus-data
get the password content of the file admin.password
log again to the admin console and put the password and reinit your password.
Done !