Tools required
<https://github.com/its-a-feature/KeytabParser>
<https://github.com/sosdave/KeyTabExtract>
I usually install them under /opt/linuxad
You will need to upload them on to the target host.
Most likely you will need to be root to do this
python KeytabParser.py /etc/krb5.keytab
klist -k /etc/krb5.keytab
./keytabextract.py /etc/krb5.keytab
ls /tmp/ | grep krb5cc # usual location
To reuse
chmod 600 <name of the file>export KRB5CCNAME=/location/ticket_name