2.4 Creating, Moving and Deleting Files

Question 1

Create | Move | Delete

glob

matches any number of any characters including no characters

Answer 1

*

Question 2

Create | Move | Delete

glob

matches any one character

Answer 2

?

Question 3

Create | Move | Delete

glob

matches class of characters

Answer 3

[]

Question 4

Create | Move | Delete

posix

letters and numbers

Answer 4

[:alnum:]

Question 5

Create | Move | Delete

posix

upper and lowercase letters

Answer 5

[:alpha:]

Question 6

Create | Move | Delete

posix

spaces and tabs

Answer 6

[:blank:]

Question 7

Create | Move | Delete

posix

control characters
backspace, bell, NAK, escape

Answer 7

[:cntrl:]

Question 8

Create | Move | Delete

posix

numerals (0123456789)

Answer 8

[:digit:]

Question 9

Create | Move | Delete

posix

graphic characters - all except ctrl and space

Answer 9

[:graph:]

Question 10

Create | Move | Delete

posix

lowercase letters (a-z)

Answer 10

[:lower:]

Question 11

Create | Move | Delete

posix

printable characters (alnum, punct and space characters)

Answer 11

[:print:]

Question 12

Create | Move | Delete

posix

punctuation characters - i.e !, &, “ .

Answer 12

[:punct:]

Question 13

Create | Move | Delete

posix

whitespace chars - tabs, spaces, newlines

Answer 13

[:space:]

Question 14

Create | Move | Delete

posix

uppercase letters (A-Z)

Answer 14

[:upper:]

Question 15

Create | Move | Delete

posix

Hexadecimal numerals (usually 0123456789abcdefABCDEF).

Answer 15

[:xdigit:]

Question 16

Create | Move | Delete

what will the following command do and should NEVER be run

rm -ri /*

Answer 16

remove all files and directories writable by your user account. This includes any
network file systems

Question 17

Create | Move | Delete

Other than using -i, is it possible to prevent mv from overwriting destination files

Answer 17

-n
–no-clobber

Question 18

Create | Move | Delete

Explain cp -u

Answer 18

causes cp to only copy a file if the destination is missing or is older than the
source file