确认ASLR是否已经被打开，"2"表示已经打开
shanks@shanks-ubuntu:/home/shanks# cat /proc/sys/kernel/randomize_va_space 2
切换到root用户来做更新，直接使用sudo会出现下面结果
shanks@shanks-ubuntu:~$ sudo echo 0 > /proc/sys/kernel/randomize_va_space bash: /proc/sys/kernel/randomize_va_space: Permission denied
要确认root已经被解锁，否则是切换不到root下的
shanks@shanks-ubuntu:~$ su Password: su: Authentication failure
解锁root，可采用以下方式
shanks@shanks-ubuntu:~$ sudo passwd Enter new UNIX password: Retype new UNIX password: passwd: password updated successfully
切换至root下关闭ASLR
shanks@shanks-ubuntu:~$ su Password: root@shanks-ubuntu:/home/shanks# echo 0 > /proc/sys/kernel/randomize_va_space root@shanks-ubuntu:/home/shanks# cat /proc/sys/kernel/randomize_va_space 0