What is sed awk grep?
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distinguish between user mode and kernel mode?
How do you change file permissions?
Suppose 1000 processes are running on the system out of those if you have to show only certain process ids which command will you use?
What is the comma to display different lines that are found when compare two files?
The rm command removes links to file. What does this mean? How then is a file deleted from the file system?
How do I delete files from command prompt?
What is an Environment Variable?
how to sort the content of the file based on numeric values
Why is grep called grep?
what is the cmd to remove the comment lines from a file and to display the original text without comments? thanks in advance......
What are the commands in UNIX to list the files in a Directory?
What is the different between UNIX command and UNIX shell script?