Renew Kerberos ticket.

List cached Kerberos tickets.

```\$ klist
```
```Ticket cache: KEYRING:persistent:10000:krb_ccache_Nv2FjQZ
Default principal: octo@OCTOCAT.LAB

Valid starting       Expires              Service principal
10/03/2021 18:06:02  10/04/2021 04:06:02  krbtgt/OCTOCAT.LAB@OCTOCAT.LAB
renew until 10/04/2021 18:06:02
```

This ticket is valid till 4th October 04:06 and can be renewed up to 4th October 18:06, but it needs to be done before it expires.

Requests renewal of the ticket.

```\$ kinit -R
```

On 3rd October 22:24 the ticked was extended till 4th October 08:24.

```\$ klist
```
```Ticket cache: KEYRING:persistent:10000:krb_ccache_Nv2FjQZ
Default principal: octo@OCTOCAT.LAB

Valid starting       Expires              Service principal
10/03/2021 22:24:16  10/04/2021 08:24:16  krbtgt/OCTOCAT.LAB@OCTOCAT.LAB
renew until 10/04/2021 18:06:02
```

After the expiration date, the ticket cannot be renewed as I mentioned earlier.

```\$ date
```
```Mon 04 Oct 2021 09:03:20 AM CEST
```
```\$ kinit -R
```
```kinit: No credentials cache found while renewing credentials
```

Obtain and cache new Kerberos ticket.

```\$ kinit
```
```Password for octo@OCTOCAT.LAB: **********
```

That is all.