Chapter 5. Working with SELinux
The following sections give a brief overview of the main SELinux packages in Fedora 10; installing and updating packages; which log files are used; the main SELinux configuration file; enabling and disabling SELinux; SELinux modes; configuring Booleans; temporarily and persistently changing file and directory labels; overriding file system labels with the
mount command; mounting NFS file systems; and how to preserve SELinux contexts when copying and archiving files and directories.
In Fedora 10, the SELinux packages are installed by default, unless they are manually excluded during installation. By default, SELinux targeted policy is used, and SELinux runs in enforcing mode. The following is a brief description of the main SELinux packages:
policycoreutils: provides utilities, such as
setsebool, for operating and managing SELinux.
system-config-selinux, a graphical tool for managing SELinux.
: provides the SELinux Reference Policy. The SELinux Reference Policy is a complete SELinux policy, and is used as a basis for other policies, such as the SELinux targeted policy. Refer to the Tresys Technology SELinux Reference Policy
page for further information. The selinux-policy-devel
package provides development tools, such as
, as well as example policy files. This package was merged into the selinux-policy
: provides SELinux policies. For targeted policy, install selinux-policy-targeted. For MLS, install selinux-policy-mls. In Fedora 8, the strict policy was merged into targeted policy, allowing confined and unconfined users to co-exist on the same system.
setroubleshoot-server: translates denial messages, produced when access is denied by SELinux, into detailed descriptions that are viewed with
sealert (which is provided by this package).
, and setools-console
: these packages provide the Tresys Technology SETools distribution
, a number of tools and libraries for analyzing and querying policy, audit log monitoring and reporting, and file context management
. The setools
package is a meta-package for SETools. The setools-gui
package provides the
tools. The setools-console
package provides the
command line tools. Refer to the Tresys Technology SETools
page for information about these tools.
libselinux-utils: provides the
mcstrans: translates levels, such as
s0-s0:c0.c1023, to an easier to read form, such as
SystemLow-SystemHigh. This package is not installed by default.
To install packages in Fedora 10, as the Linux root user, run the
command. For example, to install the mcstrans package, run the
yum install mcstrans command. To upgrade all installed packages in Fedora 10, run the
yum update command.
In previous versions of Fedora, the selinux-policy-devel package is required when making a local policy module with