how do I tail logs in open shift using oc client

Use the --tail option.

oc logs api-myapp-v1-48-cdrs2 --tail=50

You can use the --help option to commands to find out what options they accept.

For some hands on exercises to help you learn OpenShift, see:

use -f along with tail, that will work

oc logs -f api-myapp-v1-48-cdrs2 --tail=5

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