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Computer Science - Unix

@ : Home > Computer Science > Unix > Section 1

Exercise

"Actions speak louder than words."
- (Proverb)
1. 

Which symbol will be used with grep command to match the pattern pat at the beginning of a line?
A. ^pat
B. $pat
C. pat$
D. pat^
E. None of the above
2. 

Which command is used to sort the lines of data in a file in reverse order
A. sort
B. sh
C. st
D. sort -r
E. None of the above
3. 

Which command is used to display the top of the file?
A. cat
B. head
C. more
D. grep
E. None of the above
4. 

Which command is used to copy all files having the string chap and any two characters after that to the progs directory?
A. cp chap?? progs
B. cp chap* progs
C. cp chap[12] /progs/*.*
D. cp chap?? /progs/*
E. None of the above
5. 

Which command is used to change protection mode of files starting with the string emp and ending with 1,2, or 3?
A. chmod u+x emp[l-3]
B. chmod 777 emp*
C. chmod u+r ??? emp
D. chmod 222 emp?
E. None of the above

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