centos普通用户如何添加sudo权限？centos下sudo用法

#rpm -qa|grep sudo

/sbin:/usr/sbin:/usr/local/sbin:/usr/kerberos/sbin
$ cat .bash_profile
# .bash_profile
# Get the aliases and functions
if [ -f ~/.bashrc ]; then
        . ~/.bashrc
fi
# User specific environment and startup programs
PATH=$PATH:$HOME/bin:/sbin:/usr/sbin:/usr/local/sbin:/usr/kerberos/sbin
export PATH