Differentiate cmp command from diff command.
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How to check whether some services are running in another server or not? Suppose i am currently in a server named A.I want to check whether some services are running in server B without logging into the server B.
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Does cp command overwrite files?
Which command is used to create a directory?
How are UNIX file permissions represented?
How do I open a port?
what is telnet?
What is the first character of the output in ls l command?
By using which command we can find the CPU utilization time?
29. How to display top 10 users Who | head -10 | wc –w
what is the command to find out which shell you are running?
When the shell is reading the command line what is the difference between text enclosed between double quotes ( ” ) and text enclosed between signal quotes ( ’ )?
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
Unix Commands 
