manipulating files and directory

Question 1

what is the wildcard matches any characters and the wildcard matches any single character

Answer 1

• and ?

Question 2

wildcard that matches any character that is a member of the set characters or not the member or of the specified class

Answer 2

[characters] [!characters] [[:class:]]

Question 3

character classes

Answer 3

alphanumberic [:alnum:] alphabetic [:alpha:] numeral [:digit:] lowercase letter [:lower:] uppercase letter [:upper:]

Question 4

what is the wildcard of any file beginning with either an ‘a’, ‘b’ or ‘c’

Answer 4

[abc]*

Question 5

what is the wildcard of any file beginning with ‘back’ follow by three numerals

Answer 5

back[:digit:][:digit:][:digit:]

Question 6

what is the wildcard of any file ending with lowercase letter or numeral ‘1’ or ‘2’

Answer 6

*[[:lower:]12]

Question 7

how to create directory ‘dir1’

Answer 7

mkdir dir1

Question 8

how to create multi directory ‘dir1’,’dir2’and’dir3’

Answer 8

mkdir dir1 dir2 dir3

Question 9

how to copy a file or directory ‘item1’ to file or directory ‘item2’

Answer 9

cp item1 item2

Question 10

how to copy multiple items ‘item1’ ‘item2’ ‘item3’ to a directory ‘items’

Answer 10

cp item1 item2 item3 items

Question 11

how to copy files and directories with all of their attributes including ownerships and permission

Answer 11

cp -a

Question 12

how to set a confirmation before overwriting an existing file when coping the files

Answer 12

cp -i

Question 13

how to recursively copy directories itself and their content

Answer 13

cp -r

Question 14

how to display informative messages as the copy is performed

Answer 14

cp -v

Question 15

how to copy file only when that file either dont exist or are newer than the existing corresponding files in the destination directory

Answer 15

cp -u

Question 16

how to copy all the file in dir1 but not dir1 itself to dir2 where dir2 must alr exist

Answer 16

cp dir1/* dir2

Question 17

how to copy the all content of directory dir1 to dir2 and dir2 can does not exist

Answer 17

cp -r dir1 dir2

Question 18

how to rename a file ‘item1’ to ‘item2’

Answer 18

mv item1 item2

Question 19

how to move files ‘item1’ ‘item2’ to ‘dir1’

Answer 19

mv item1 item2 dir1

Question 20

confirmation of move

Answer 20

mv -i

Question 21

moving files from one directory to another, only move files that either dont exist or are newer than the existing corresponding files in the destination directory

Answer 21

mv -u

Question 22

display informative messages as the move is performed

Answer 22

mv -v

Question 23

move ‘dir1’ and its content to ‘dir2’ where dir2 can be exist or not, and dir1 is deleted

Answer 23

mv dir1 dir2

Question 24

remove ‘item’ ‘item2’

Answer 24

rm item item2

Question 25

confirmation of remove; ignore nonexistent files and overrides confirmation to remove

Answer 25

rm -i ; rm -f

Question 26

Recursively delete dir even dir has subdir. When delete a dir, this option must be specified

Answer 26

rm -r

Question 27

delete file1 and dir1 and its contents no matter either file1 or dir1 do not exist

Answer 27

rm -rf file1 dir1

Question 28

how to create hard link

Answer 28

ln file link

Question 29

how to create a symbolic link

Answer 29

ln -s item link

Question 30

make a hard link ‘fun-hard’ in ‘dir1’ that point to item ‘fun’

Answer 30

ln fun dir1/fun-hard

Question 31

how to list the files with long format and inode

Answer 31

ls -li

Question 32

how to create a symbolic link of between dir1 and dir1-sym

Answer 32

ln -s dir1 dir1-sym

Question 33

how to create a symbolic link of file ‘fun’ and ‘fun-sym’ in ‘dir1’ where in current directory

Answer 33

ln -s ../fun dir1/fun-sym