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Thursday, October 15, 2015

What is a defunct process in Linux?

  • These are also termed as zombie process.
  • These are those process who have completed their execution but still has an entry in the process table.
  • When a process ends, all of the memory and resources associated with it are de-allocated so they can be used by other processes.
  • After the zombie is removed, its process identifier (PID) and entry in the process table can then be reused.
  • Zombies can be identified in the output from the Unix ps command by the presence of a "Z" in the "STAT" column

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