What is awk good for?
What are the dos commands?
What are filter commands in unix?
How to copy multiple files and directories into some other directory?
How to use grep command to list find the records of a file containing 10 different strings?
What is time_t?
Describe the usage and functionality of the command rm –r * in unix?
Can a process kill itself in UNIX/or in its various versions?
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
What are grep patterns?
How will you know who are the users logged in to the system before 15 minutes?
How do I delete files from command prompt?
Name the various commands that are used for the user information in unix.