Nortel Networks NN43001-315 - Manual (Page 109)

User accounts and access control 109
pstat Print a status summary of all loaded patches.
plis Print detailed information about a specific patch.
Note: The nortel user account is the designated user account for the
execution of these CLI commands.
Patch retention
A patch is always retained until the poos CLI command explicitly puts the
patch out of service.
Note: In some cases you cannot remove a patch (the poos CLI
command fails).
Software exceptions
Linux kernel exceptions
If the Linux kernel encounters an unrecoverable error, it prints and logs
a short description of the problem, and can produce an undefined result.
Typical causes of such errors are unrecoverable hardware errors or bugs
in the kernel software.
A nonfatal kernel exception is reported through a log in the kernel, and
captured in the syslog. Kernel logs, due to invalid memory addresses,
do not normally result in a kernel panic (crash); instead the process that
triggers the fault terminates. These can produce a lasting negative impact
on the system. It is recommended that such events be monitored in user
space (using the syslog mechanism), and that a full system reboot be
triggered after receipt of a kernel log report.
User accounts and access control
User accounts and access control methods are managed by native Linux
user account management, and tools such as Radius and PAM. There is
a diagnostic group and some default diagnostic users for debugging and
maintenance purposes.
Linux base includes the following accounts:
• root (as Linux default)
Note 1: Logging in as root is strongly discouraged unless you are
explicitly directed to do so. All of the base maintenance and debug
actions must be performed using the nortel or sysadmin accounts.
Nortel Communication Server 1000
Linux Platform Base and Applications Installation and Commissioning
NN43001-315 02.09
29 October 2008
Copyright © 2007–2008 Nortel Networks
.