Answer Posted / anandhi

$rm –rf .??*


With the option –rf and the use " .??* " will remove/delete
all hidden files/directory. The initial " . " indicates
a 'hidden' file and the " ?? " match at least two
characters to exclude the parent-directory which is " .. "
and to remove or delete everything the " * " will match all
number or characters that used for files or directory name.

Explain mount and unmount command.

1205

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What is difference between grep and find command in unix?

1195

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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:

2252

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What are the differences among a system call, a library function, and a unix command?

1203

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Which command is used to find whether the system is 32 bit or 64 bit?

1134

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What is the use of tee command?

1143

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Name the various commands that are used for the user information in unix.

1077

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What is sed awk grep?

1122

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How to display no of records in oracle using unix command?

1160

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Explain how to use grep command to list find the records of a file containing 10 different strings?

1059

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What is the behavioural difference between cmp and diff commands?

1268

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What is the pipe command?

1171

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

1212

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What are bash commands?

1146

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What is awk used for?

1115

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