what is the shell for dos,nt operating systems?
What is the difference between cat and more command?
What is "type" command in unix?what is the functionality??
What command is used to check the current users?
What do know about tee command?
Explain ‘library functions’ with respect to unix commands?
Explain mount and unmount command.
Who wrote grep?
What are file permissions in Unix, and how are they represented?
distinguish between user mode and kernel mode?
Which command will you use to change the permissions on file?
how to sort the content of the file based on numeric values
Sorry to all Technical person for mistake of Question. Now i am post currect question Why copied file permission is changed in destination. When i give all permission i.e 777 to file and copy that to other location in destination the permission is 755. But if give permission 555 in destination that file permission is 555 and if give permission 444 to file after copy in destination the file permission is 444. These all are happening in normal user. How the umask value is calculate here really i am not understand. Please write the proper answer. Thanks in Advance