Путеводитель по Руководству Linux

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   core    ( 5 )

файл дампа ядра (core dump file)

  Name  |  Description  |    Note    |  Examples  |  See also  |

Примечание (Note)

The gdb(1) gcore command can be used to obtain a core dump of a
       running process.

In Linux versions up to and including 2.6.27, if a multithreaded process (or, more precisely, a process that shares its memory with another process by being created with the CLONE_VM flag of clone(2)) dumps core, then the process ID is always appended to the core filename, unless the process ID was already included elsewhere in the filename via a %p specification in /proc/sys/kernel/core_pattern. (This is primarily useful when employing the obsolete LinuxThreads implementation, where each thread of a process has a different PID.)