The difference between a wild card and a regular expression

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Reference no: EM132154753

All in Unix

1. How do you select from a file (i) lines 5 to 10, (ii) second-to-last line?

2. How do you extract the names of the users from /etc/passwd after ignoring the first 10 entries?

3. How do you display a list of all processes without the ps header line where processes with the same name are grouped together?

4. List from /etc/passwd the UID and the user having the highest UID

5. What is the difference between a wild card and a regular expression?

6. How do these expressions differ?

(i) [0-9]* and [0-9][0-9]*,

(ii) ^[^^] and ^^^.

7. How do you delete all leading and trailing spaces in all lines?

Reference no: EM132154753

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