Modify File and Directory Ownership / Configure Special Permissions and Attributes

Question 1

Change owner but not group

Answer 1

chown {user name} {file/directory name}

Question 2

Change owner and group

Answer 2

chown {user name} :{group name} {file directory name}

Question 3

Changes owner and group to specified user’s login group

Answer 3

chown {user name}: {file/directory name}

Question 4

Change group but not owner (Same as chgrp command)

Answer 4

chown :{group name} {file/directory name}

Question 5

Change a group without using chown

Answer 5

chgrp {group name} {file / directory name}

Question 6

set SUID on a file using symbolic and absolute mode

Answer 6

chmod u+s {file names}

chmod 4### {file names}

Question 7

set GUID on file using symbolic and absolute mode

Answer 7

chmod g+s {file names}

chmod 2### {directory names}

Question 8

Removing SUID and SGID in symbolic and absolute mode

Answer 8

symbolic: use - symbol
absolute: 0###

Question 9

Special permission bit that ensures only the owner of a file or directory (or root) can delete the file or directory

Answer 9

sticky bit

Question 10

set sticky bit using symbolic and absolute mode

Answer 10

chmod +t {directory or file name}

chmod 1### {directory or file name}

Question 11

remove sticky bit using symbolic and absolute mode

Answer 11

chmod -t {directory or file name}

chmod 0###

Question 12

attribute of a file or directory that prevents it from being modified, even by root

how is it indicated in file attributes?

Answer 12

immutable flag

lowercase i in attributes indicates it

Question 13

command used to list the attributes of a file or directory

Answer 13

lsattr [options] {file/directory name}

Question 14

option to list directories like files, instead of listing their contents

Answer 14

-d

Question 15

option to list the version number of the file

Answer 15

-v

Question 16

command to change attributes of a file or directory

Answer 16

chattr

Question 17

option to make file immutable (requires super user privileges)

Answer 17

chattr +i {file/directory name}

Question 18

command used to retrieve ACLs of files and directories

Answer 18

getfacl

Question 19

change permissions associated with ACL of a file or directory

Answer 19

setfacl