What sudo means in linux?
Run 'man <program name>' to get the full manual to a
program. Below is an example how to get the sudo manual and the
first few lines of the manual.
$ man sudo
NAME
sudo, sudoedit - execute a command as another user
SYNOPSIS
sudo -h | -K | -k | -L | -V
sudo -v [-AknS] [-g group name|#gid] [-p prompt] [-u
username|#uid]
sudo -l[l] [-AknS] [-g group name|#gid] [-p prompt] [-U user
name]
[-u user name|#uid] [command]
sudo [-AbEHnPS] [-C fd] [-g group name|#gid] [-p prompt]
[-u user name|#uid] [VAR=value] [-i | -s] [command]
sudoedit [-AnS] [-C fd] [-g group name|#gid] [-p prompt]
[-u user name|#uid] file ...
DESCRIPTION
sudo allows a permitted user to execute a command as the
superuser or
another user, as specified in the sudoers file. The real and
effective
uid and gid are set to match those of the target user as
specified in
the passwd file and the group vector is initialized based on the
group
file (unless the -P option was specified). If the invoking user
is
root or if the target user is the same as the invoking user,
no
password is required. Otherwise, sudo requires that users
authenticate
themselves with a password by default (NOTE: in the default
configuration this is the user's password, not the root
password).
Once a user has been authenticated, a time stamp is updated and
the
user may then use sudo without a password for a short period of
time
(15 minutes unless overridden in sudoers).