Q17
Which command is used to concatenate all files beginning with the string 'emp' and followed by a non-numeric characters?
A.
cat emp[!0-9]
AnswerB.
more [emp][!0-9]
C.
cat emp[x-z]
D.
cat emp[a-z]
E.
None of the above
Answer: Option A
Solution
Answer: Option A
Solution:
In Unix, the command cat emp[!0-9] is used to concatenate all files beginning with the string 'emp' and followed by a non-numeric character. Here, the square brackets denote character classes, and the exclamation mark (!) negates the character class. So, [!0-9] matches any character that is not a numeric character.Therefore, Option A: cat emp[!0-9] is the correct command to concatenate all files beginning with the string 'emp' and followed by a non-numeric character.