□ su(substitute user)
○ This linux command allows a user to log in as another user Without log out
○ "su" without parameter is same as "su root"(=Login as root)
○ Account password to login is required
○ "su" without parameter is same as "su root"(=Login as root)
○ Account password to login is required
□ sudo(substitute user do)
○ This linux command allows a user to execute as another user's authority Without log out
○ "sudo" without parameter is same as "sudo -u root"(=Execute as root's authority)
○ Current login account's password is required
○ sudo -l : Method of checking the related rights when the sudo is used
○ "sudo" without parameter is same as "sudo -u root"(=Execute as root's authority)
○ Current login account's password is required
○ sudo -l : Method of checking the related rights when the sudo is used
□ Difference between "su" and "sudo su"
○ su : system admin(=root) account's password is required
○ sudo su : Current login account's password is required
○ sudo su : Current login account's password is required
| 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 | ||