Gopal Ghosh wrote:
Dear All, could any one help me with Privilege available to *root /su/
sudo and also the difference between the above three *
"root" is a username
"su" is a command which switches who you are logged in as ("substitute user")
"sudo" allows you to run a command as if you were another user (a pun on the word "pseudo")
***************************************************************
[gopalghosh@localhost ~]$ whoami
gopalghosh
[gopalghosh@localhost ~]$ login
login: root
Password:
Login incorrect {why it is saying Login incorrect as I am typing the
correct password}
I've never seen the command "login" used in a shell before... most people use su.
check "man login" for details of login if you really want to use it. Otherwise I presume su is sufficient (I've never
needed to use "login" myself).
[gopalghosh@localhost ~]$ login
login: root
Password:
Login incorrect
[gopalghosh@localhost ~]$ su
Password: {when I logged as su it accepted the same password}
[root@localhost gopalghosh]# sudo ls
there is no point doing "sudo ls" as root, as that command basically says "run 'ls' as root".
Desktop Documents Download Music Pictures Public Templates Videos
[root@localhost gopalghosh]# exit exit
[gopalghosh@localhost ~]$ sudo nano
We trust you have received the usual lecture from the local System
Administrator. It usually boils down to these three things:
#1) Respect the privacy of others.
#2) Think before you type.
#3) With great power comes great responsibility.
[sudo] password for gopalghosh:
gopalghosh is not in the sudoers file. This incident will be reported.
{how to add my local login in sudoers file}
check your /etc/sudoers file
for general use, there is no real need for sudo. You might need it in a multi-user environment where you want someone to
have access to some higher-level functions but not to know the root password.
however, in a one-user environment (a laptop is usually single-user), there's no real point using sudo.
personally, I either su to root, or run something like this:
su -c ls
this is just my opinion - perhaps other people have good reasons to use it.
kae
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