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Update persistent-screen.md with the cern-get-keytab command #60

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Update persistent-screen.md with the cern-get-keytab command #60

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10 changes: 9 additions & 1 deletion shell-extras/persistent-screen.md
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Expand Up @@ -3,7 +3,15 @@
### Setting up password-less kerberos token

In order for the kerberos token to be refreshed automatically, it must be possible to do so without a password.
Therefore, we create a keytab (similar to a private ssh key) on lxplus using the keytab utility. After starting it by typing `ktutil`, type the following three lines into the prompt and confirm the first two steps with your password.
Therefore, we create a keytab (similar to a private ssh key) on lxplus.

We can do this using

```bash
cern-get-keytab --keytab USERNAME.keytab --user --login USERNAME
```

or manually using the keytab utility. After starting it by typing `ktutil`, type the following three lines into the prompt and confirm the first two steps with your password.
```bash
add_entry -password -p [email protected] -k 1 -e arcfour-hmac-md5
add_entry -password -p [email protected] -k 1 -e aes256-cts
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