Can you explain a little bit about command substitution?

1066

Describe the usage and functionality of the command rm –r * in unix?

1971

What does the md command do?

1077

Differentiate cmp command from diff command.

1112

What is the significance of the 'tee' command?

1140

What is pipe command in unix?

1239

What is the function of grep command in unix?

1113

Is there a way to erase all files in the current directory, including all its sub-directories, using only one command?

1344

What is used to type command?

1013

What is s and g in sed command?

1065

What are filter commands in unix?

1117

What is the functionality of a top command?

1058

What is the command to compare two files in unix?

1059

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:

2209

How do I use grep to search for a file?

1016