Rhsca day 11 operation

Homework today ：
1. create a file , And give authority 611( Two ways , A kind of guoa, A kind of nnn)

[[email protected] ~]# chmod 755 chom_dir
[[email protected] ~]# chmod u=rwx,go=rx chom_dir

2. Create directory , And give authority 755( Two ways , A kind of guoa, A kind of nnn)

[[email protected] ~]# chmod 611 chom_dir.txt 

[[email protected] ~]# chmod u=rw,go=x chom_dir.txt

3. create a file , And modify the owner and group of the file to other users

4. Set up suid, Set for file suid( Two ways u+s and nnnn) The way

[[email protected] ~]# chmod u+s chom_test.txt
[[email protected] ~]# ll chom_test.txt 
-rwSr--r--. 1 sarah sarah 0 11 month  26 00:00 chom_test.txt
[[email protected] ~]# chmod u+x chom_test.txt
[[email protected] ~]# ll chom_test.txt 
-rwsr--r--. 1 sarah sarah 0 11 month  26 00:00 chom_test.txt
[[email protected] ~]# chmod 4774 chom_test.txt 
[[email protected] ~]# ll chom_test.txt 
-rwsrwxr--. 1 sarah sarah 0 11 month  26 00:00 chom_test.txt

5. Set up sgid, Set for file sgid( Two ways g+s and nnnn) The way

[[email protected] ~]# chmod g+x chmo_test2
[[email protected] ~]# chmod g+s chmo_test2
[[email protected] ~]# ls -dl chmo_test2/
drwxr-sr-x. 2 root root 6 11 month  26 00:29 chmo_test2/

6. Set up sbit, Set for directory sbit( Two ways o+t and nnnn) The way

[[email protected] ~]# touch chmo_test3
[[email protected] ~]# chmod o+x chmo_test3
[[email protected] ~]# chmod o+t chmo_test3
[[email protected] ~]# ll chmo_test3
-rw-r--r-t. 1 root root 0 11 month  26 00:42 chmo_test3
[[email protected] ~]# chmod 1645 chmo_test3
[[email protected] ~]# ll chmo_test3
-rw-r--r-t. 1 root root 0 11 month  26 00:42 chmo_test3

7. create a file , Query file acl
Set for file acl The user is testuser1 Permission is rwx
Set for file acl Of mask: Permission is r-x

 

[[email protected] ~]# useradd testuser1
[[email protected] ~]# touch acl_test01
[[email protected] ~]# getfacl acl_test01 
# file: acl_test01
# owner: root
# group: root
user::rw-
group::r--
other::r--


[[email protected] ~]# setfacl -m u:testuser1:rwx acl_test01
[[email protected] ~]# getfacl acl_test01 
# file: acl_test01
# owner: root
# group: root
user::rw-
user:testuser1:rwx
group::r--
mask::rwx
other::r--


[[email protected] ~]# setfacl -m m:r-x acl_test01 
[[email protected] ~]# getfacl acl_test01 
# file: acl_test01
# owner: root
# group: root
user::rw-
user:testuser1:rwx		#effective:r-x
group::r--
mask::r-x
other::r--