What is the protocol for PING command?
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Assume the following files are in the working directory prompt> ls -l tasks -rw-r--r-- 1 alex student 1423 Feb 21 14:01 tasks What command can Alex use to give everyone permission to write to the file? What will the ls -l command display if he does so?
What is pipe command in unix?
Write a command to find all of the files which have been accessed within the last 30 days.
Why is grep called grep?
How to add content of one file into another file at the beginning
what do you understand by 'unix is a portable os'?
How to delete a directory containing files and folders?
Is there a way to erase all files in the current directory, including all its sub-directories, using only one command?
in unix echo is used for
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how many internal commands is there in UNIX?
Which command is used to delete all files in the current directory and all its sub-directories?
How does one process we can start an executable file? How to get the PID process, which we started?
Unix Commands 
