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How do you kill a zombie process?
You can follow below steps to attempt killing zombie processes without system reboot.
- Identify the zombie processes. top -b1 -n1 | grep Z.
- Find the parent of zombie processes.
- Send SIGCHLD signal to the parent process.
- Identify if the zombie processes have been killed.
- Kill the parent process.
What do you mean by a zombie process give example?
A zombie process is a process in its terminated state. This usually happens in a program that has parent-child functions. After a child function has finished execution, it sends an exit status to its parent function. A zombie process is also known as a defunct process.
Which is an example of a zombie process?
A zombie process is a process whose execution is completed but it still has an entry in the process table. Zombie processes usually occur for child processes, as the parent process still needs to read its child’s exit status.
When does a child process become a zombie?
A child process always first becomes a zombie before being removed from the resource table. In most cases, under normal system operation zombies are immediately waited on by their parent and then reaped by the system – processes that stay zombies for a long time are generally an error and cause a resource leak .
How do you remove a zombie from a system?
To remove zombies from a system, the SIGCHLD signal can be sent to the parent manually, using the kill command. If the parent process still refuses to reap the zombie, and if it would be fine to terminate the parent process, the next step can be to remove the parent process.
What does zombie process mean in MCA operating system?
Computer Engineering MCA Operating System A zombie process is a process whose execution is completed but it still has an entry in the process table. Zombie processes usually occur for child processes, as the parent process still needs to read its child’s exit status.