What does grep v do?
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distinguish between paging and swapping?
What is $0 bash?
Can you explain a little bit about command substitution?
What does sed command do in unix?
what do you understand by 'unix is a portable os'?
What is the Unix file system hierarchy?
Explain iostat, vmstat and netstat.
How are UNIX file permissions represented?
How to check the flavor of UNIX?
distinguish between physical addresses and logical address?
How to remove a crontab file?
How would you find the size of a file or directory?