I set up a kerberos-aware nfs server and some clients. I mount with "-o
sec=krb5" successfully first time. For some reason, I change the krb5.keytab by
copying a backup keytab and rerunnig ipa-getkeytab command, and then reboot the nfs
server. Now the client mounting succesfully before is unable to mount any more unless
reboot, but other new clients are able to mount. How to fix those clients without
rebooting.
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