The centos system sets sudo permissions for normal users.

A. Check whether sudo is installed.

# Rpm-Qa | grep sudo

B. Modify the/etc/sudoers file and add a sudo user.

# Define do-F/etc/sudoers

C. After root all = (all) All, add

Tom all = (all) All

Defaults: tomtimestamp_timeout =-1, runaspw

// Add the sudo permission for Tom in the normal account

// Timestamp_timeout =-1. You only need to verify the password once and the system will automatically remember it later.

// Runaspw requires the root password. If you do not add the default password, you need to enter the password of the normal account.

D. Modify the. bash_profile file of a common user (VI/home/Tom/. bash_profile) and add it to the PATH variable for downloading.

/Sbin:/usr/local/sbin:/usr/Kerberos/sbin