Enable sudo in centos6.6 and disable root remote logon.

By default, centos does not enable sudo and can directly log on to the server as a super administrator.

1. Add a sudo user

Run the mongodo command and find:

1	root    ALL=(ALL) ALL

Add the following: (Note that sky9890 is a new common user in Linux)

1	sky9890 ALL=(ALL) ALL

# Note: You can add all permissions for the user here. The user added above has nothing to do with this experiment.

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:

In the configuration file "/etc/ssh/sshd_config", many items have been commented out by #, which is actually effective. Permitrootlogin was not found during the first experiment, and a permitrootlogin no was added. The result shows that the remote connection is indeed unable, and the added permitrootlogin is removed from the end #PermitRootLogin Yes. After sshd is restarted, you can connect remotely.

This article is from the "O & M" blog and will not be reproduced!

Enable sudo in centos6.6 and disable root remote logon.