Is there any method to erase all files in the current directory, along with its all sub-directories, by using only one command?
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A file has 1000 lines and i want to display only 1st line how to do it? pls ..tel me
How can i know my Filesystem and its current usage in my prod UNIX system?
How does one process we can start an executable file? How to get the PID process, which we started?
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
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