Answer Posted / hr@tgksolutions.com

A signal in Unix is an asynchronous notification sent to a process to notify it of an event, such as an interrupt or termination request. Common signals include:
• SIGINT: Interrupt signal (usually sent by pressing Ctrl+C).
• SIGTERM: Termination signal, which can be caught and handled.
• SIGKILL: Forces a process to terminate immediately and cannot be caught.
Signals can be handled using signal handlers in shell scripts or programming languages like C.

What is difference between grep and find command in unix?

1276

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What is merge command in unix?

1558

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What is grep and how do you use it?

1175

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How does pipe () work?

1146

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When i run a programm of orphan process. Instead of getting child's parent (ppid)=1 ..i get 1400 and it varies as per system. How can i findthe right soluion??? My pgm: #include # include int main() { int pid; pid=fork(); if(pid < 0) {exit(-1);} else if(pid==0) { printf("Child Process is Sleeping ..."); sleep(10); printf("Orphan Child's Parent ID : %u ",getppid()); } else { printf("Parent Process Completed ... %u ",getpid()); exit(0); } return 0; } Output:

2318

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What is the nmap command?

1240

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What do chmod command do?

1288

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Explain command to show the space allocation of files?

1170

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What happens when we execute a unix command?

1200

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Who command in unix operating system?

1191

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What is the use of the tee command?

1153

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Is ‘du’ a command? If so, what is its use?

1202

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What are file commands?

1288

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What does the command '$ls | wc –l > file1' do?

1300

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Differentiate cat command from more command.

1205

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