selinux_list_contexts

[centos7, linux, selinux]

CentOS 7 - List SELinux contexts

First, install setools:
```
yum install setools
```

List all types:
```
seinfo -t
```
List all users:
```
seinfo -u
```
List all roles:
```
seinfo -r
```
List all booleans:
```
seinfo -r
```
Help:
```
seinfo --help
```

Example

You want to add a CIFS share and set the correct SELinux context on the shared directory and below.

Find the samba type:

seinfo -t |grep samba
   samba_secrets_t
   samba_spool_t
   samba_unconfined_script_exec_t
   samba_net_t
   samba_var_t
   samba_net_exec_t
   samba_net_tmp_t
   samba_unconfined_net_t
   samba_unconfined_script_t
   samba_unit_file_t
   sambagui_exec_t
   samba_share_t
   samba_initrc_exec_t
   sambagui_t
   samba_etc_t
   samba_log_t

We probably need samba_share_t.
Check already configured contexts:
```
semanage fcontext -l
```
Set the context, if you don't know how, check semanage fcontext --help and read the semanage-fcontext manpage (with examples).
```
semanage fcontext -a -t samba_share_t "/opt/smbdata(/.*)?"
```