Enable sudo in CentOS and disable root remote logon.

Enable sudo in CentOS and disable root remote logon.

By default, CentOS does not enable sudo and can directly log on to the server as a super administrator. Ubuntu is better in this aspect. To ensure security and reduce the loss caused by misoperations, we recommend that you enable sudo.

1. Add a sudo user

Run the mongodo command and find:

1 Root ALL = (ALL) ALL

Add the following: (Note: qianyunlai is a new common user in Linux)

1 Qianyunlai ALL = (ALL) ALL

2. Prohibit root User Logon

Edit/etc/ssh/sshd_config and set

1 PermitRootLogin Yes

Change

1 PermitRootLogin no

Restart sshd:

1 Service sshd reload

Note:

Although many items are commented out by # in the configuration file "/etc/ssh/sshd_config", they are valid by default.