□ When linux is installed, like the picture above, there is a case that the password is stored in the passwd file
□ If the password policy is changed to shadow, each account's password of password file is changed to x
□ pwconv : It is linux command to change password policy(passwd → shadow)(The shadow file is created)
□ pwunconv : It is linux command to change password policy(shadow → passwd)(The shadow file is deleted)
| Test environment | |||
| O S | Ubuntu 15.10 (64bit) | CPU | Intel i7-4710MQ 2.50GHz |
| SHELL | GNU bash (4.3.42) | GPU | Gallium 0.4 on SVGA3D |
| RAM | 984MiB | ||