crashconf :-The crashconf command displays and/or changes the current system crash dump configuration. The crash dump configuration consists of three lists:
• The crash dump device list, which identifies all devices that can be used to store a crash dump.
• The included class list, which identifies all system memory classes that must be included in any crash dump.
• The excluded class list, which identifies all system memory classes that should be excluded from a crash dump.
crashutil :-The crashutil command copies and preserves crash dump data, and performs format conversions on it
savecrash :-The savecrash command saves the crash dump information of the system (assuming one was made when the system crashed) and writes a reboot message in the shutdown log file
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