The reason for the failure seems to be in default configuration of PAM
for SSH.
If I understand correctly, PAM is configured to enforce session keys revocation
upon termination of parent SSHD process:
--- /etc/pam.d/sshd ---
...
# Create a new session keyring.
sessionoptional
This config file belongs to ssh, not to pam.
** Changed in: pam (Ubuntu)
Status: Confirmed = Invalid
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https://bugs.launchpad.net/bugs/1377924
Title:
ecryptfs
** Changed in: stevedore (Ubuntu)
Importance: Undecided = High
** Also affects: hundredpapercuts
Importance: Undecided
Status: New
** Changed in: hundredpapercuts
Importance: Undecided = High
** Changed in: hundredpapercuts
Status: New = Confirmed
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** Changed in: nut (Ubuntu)
Status: Triaged = Confirmed
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https://bugs.launchpad.net/bugs/1330462
Title:
Please merge nut 2.7.2-1 (main) from Debian unstable (main)
** Changed in: nut (Debian)
Status: New = Confirmed
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https://bugs.launchpad.net/bugs/1313231
Title:
[systemd] nut-client systemd unit fails when unconfigured
To
Public bug reported:
The `php5-fpm` process which is started during installation with `apt-
get` never returns and constantly uses 100 % of one CPU. There's no log
file `/var/log/php5-fpm`. After killing the process (after ~30 minutes
without any feedback) the `dpkg` installation routine fails
** Changed in: openldap (Ubuntu)
Importance: Undecided = High
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https://bugs.launchpad.net/bugs/1393306
Title:
slapd: nssov does not work with lib{nss,pam}-ldapd