Revision as of 23:06, 8 January 2016

Internal

getenforce

If SELinux is enabled, the command will return "Enforcing".

yum provides /usr/sbin/semanage
yum provides sealert

yum -y install policycoreutils-python
yum -y install setroubleshoot-server

ls -lZ <dir>

If you have a suspicion that SELinux may be at the root of your problems, run:

sealert -a /var/log/audit/audit.log

You may get an output similar to the following one, which helps diagnose the problem:

[...]
SELinux is preventing /usr/sbin/httpd from write access on the file manager.node.nodes.lock.
[...]

Then use audit2allow to parse the audit logs and generate the SELinux policy to allow a denied operation.

grep httpd /var/log/audit/audit.log | audit2allow

#============= httpd_t ==============
allow httpd_t httpd_log_t:file write;

After you see it, you can write the policy in a file:

grep httpd /var/log/audit/audit.log | audit2allow -M mysepolicy

This will generate two files: a binary .pp file and a text .te file.

Apply the policy with:

semodule -i mysepolicy.pp

The policy such applies survives a reboot.

@@ Line 8: / Line 8: @@
 * [[SELinux Concepts]]
+* [[SELinux Operations]]
 =How to Find Out Whether SELinux is Enabled=