In-depth analysis of the chcon command

Introduction

The chcon command is to modify the security context of the object (file), such as: user, role, type, security level. That is, changing the security environment of each file to the specified environment. When using the --reference option, set the security environment of the specified file to be the same as the reference file. The chcon command is located in /usr/bin/chcon. Let us explain in detail how to use the chcon command.

grammar

chcon [选项]... 环境 文件... 
chcon [选项]... [-u 用户] [-r 角色] [-l 范围] [-t 类型] 文件... 
chcon [选项]... --reference=参考文件 文件...

Options

-h, --no-dereference：影响符号连接而非引用的文件。
 --reference=参考文件：使用指定参考文件的安全环境，而非指定值。 
-R, --recursive：递归处理所有的文件及子目录。 
-v, --verbose：为处理的所有文件显示诊断信息。 
-u, --user=用户：设置指定用户的目标安全环境。
-r, --role=角色：设置指定角色的目标安全环境。
-t, --type=类型：设置指定类型的目标安全环境。 
-l, --range=范围：设置指定范围的目标安全环境。

The following options are used to set how to traverse the directory structure when the -R option is specified

-H：如果命令行参数是一个通到目录的符号链接，则遍历符号链接。 
-L：遍历每一个遇到的通到目录的符号链接。 
-P：不遍历任何符号链接（默认）。 
--help：显示此帮助信息并退出。 
--version：显示版本信息并退出.

Example If you want to share this ftp with anonymous users, you need to enable the following:

chcon -R -t public_content_t /var/ftp

If you want the FTP directory you set to be able to upload files, SELINUX needs to be set:

chcon -t public_content_rw_t /var/ftp/incoming

Allow users to HHTP access their home directories. This setting is limited to the user's home directory homepage:

setsebool -P httpd_enable_homedirs 1 chcon -R -t httpd_sys_content_t ~user/public_html

If you want to share the samba directory to other users, you need to set:

chcon -t samba_share_t /directory

When sharing the rsync directory:

chcon -t public_content_t /directories

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