ausearch - SELinux audit log search tool.
audit2allow -  Generate SELinux policy allow rules from logs of denied operations.
audit2why - Determine which component of your policy caused a denial.
chcon - Tool for changing the SELinux context of files and directories.
fixfiles - Fixfiles is a shell script that wraps setfiles and restorecon.
getenforce - Tool for getting the SELinux enforcement state.
getsebool - Tool for getting SELinux boolean values.
matchpathcon - This is a simple tool that takes files/directories and prints the default security context of the files.
restorecon - Tool for reverting files back to the default labels.
semanage - Tool for managing SELinux policy mappings.
semodule - Tool for manipulating SELinux modules.
sestatus - Tool for retrieving the current SELinux status.
setenforce - Tool for setting the SELinux enforcement state.
setsebool - Tool for setting/toggling SELinux booleans.
setroubleshoot - GUI troubleshooting tool / daemon.
system-config-securitylevel-tui - Rudimentary tool for enabling/disabling/configuring SELinux and IPtables.

Open special port:
semanage port -a -t http_port_t -p tcp 8081

Check that the port is added:
semanage port -l | grep 8081

Fix http proxy connect error: (for a list of other SELinux booleans see: getsebool)
setsebool -P httpd_can_network_connect true

Filesystem relabel: (requires reboot)
fixfiles -f -F relabel
or:
fixfiles onboot; reboot

List currently installed SELinux modules:
semodule -l

Relabel or change SELinux file contexts:
chcon -t httpd_sys_content_t -R /home/$foo
Note: Apache httpd files are served from /var/www/ on Centos for security reasons.

Search for recent SELinux AVC denials:
ausearch -m avc -ts recent
ausearch -m avc -ts today

Determine why SELinux has denied an event:
ausearch -m avc -ts today | audit2why

View SELinux file contexts on a given directory and the files within it:
ls -Z
(You can also use getfattr although, you need to specify -n security.selinux)
getfattr -n security.selinux /tmp/$foo

Reset SELinux to its initial state:
yum remove selinux-policy
rm -rf /etc/selinux
yum install selinux-policy-targeted
fixfiles -f -F relabel
reboot

Hand edit SELinux enforcement policy: (requires a reboot)
vi /etc/selinux/config

sestatus