11, only allow to upload and download files in the main directory, not allowed to log in with putty

Create user Xiao to allow only uploading and downloading files under the user's home directory (/var/www/html), not allowing Putty login

(For security reasons, do not give too much permission)

1. Create Xiao Users

[Email protected] root]# cd/var/www/html
[Email protected] html]# useradd xiao-d/var/www/html-s/sbin/nologin-g Apache

The-D directory specifies the home directory, and if this directory does not exist, the-m option can be used to create the master directory.
The-G user group specifies the user group to which the user belongs.
-S Shell file specifies the user's login shell.

[Email protected] html]# passwd Xiao

Enter the password two times to set the Xiao User's password, as

2, the owner of the/var/www/html directory and the group are changed to Apache, plus read and write permissions

[Email protected] html]# l-d.
Drwxr-xr-x 3 root root 4096 2015-06-16 06:37. (Original root)
[Email protected] html]# chown-r apache:apache.
[Email protected] html]# l-d.
Drwxr-xr-x 3 Apache Apache 4096 2015-06-16 06:37 (successfully changed to Apache)

[Email protected] html]# chmod-r 775. (Give permission to read and write)

-R the same changes to all files in the current directory as subdirectories

If this does not give permission, then uploading Dd.txt will prompt the following error

3. Testing

① See putty can login?

(No, Putty automatically disappears after entering the password)

Upload and download files under ②windows (or Linux)

It's the same with Linux.

11, only allow to upload and download files in the main directory, not allowed to log in with putty