Explain the terms ‘system calls’ and ‘library functions’ with respect to unix commands?

1159

What is the command to find hidden files in the current directory?

1145

Is there any method to erase all files in the current directory, along with its all sub-directories, by using only one command?

1154

Is grep faster than awk?

994

What command will change your prompt to myprompt?

1258

What is difference between grep and find command in unix?

1149

How do I delete files from command prompt?

1161

What is time_t?

1061

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

Explain the steps that a shell follows while processing a command.

1168

What is the functionality of a top command?

1058

What do chmod, chown, chgrp commands do?

1229

What difference between cmp and diff commands?

1253

How can we use grep command in unix?

1148

What is ‘ps’ command for?

1144