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5.5. Booleans

Booleans allow parts of SELinux policy to be changed at runtime, without any knowledge of SELinux policy writing. This allows changes, such as allowing services access to NFS volumes, without reloading or recompiling SELinux policy.

5.5.1. Listing Booleans
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For a list of Booleans, an explanation of what each one is, and whether they are on or off, run the semanage boolean -l command as the Linux root user. The following example does not list all Booleans: 
~]# semanage boolean -l
SELinux boolean                          Description

ftp_home_dir                   -> off   Allow ftp to read and write files in the user home directories
xen_use_nfs                    -> off   Allow xen to manage nfs files
xguest_connect_network         -> on    Allow xguest to configure Network Manager
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The SELinux boolean column lists Boolean names. The Description column lists whether the Booleans are on or off, and what they do.
In the following example, the ftp_home_dir Boolean is off, preventing the FTP daemon (vsftpd) from reading and writing to files in user home directories: 
ftp_home_dir                   -> off   Allow ftp to read and write files in the user home directories
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The getsebool -a command lists Booleans, whether they are on or off, but does not give a description of each one. The following example does not list all Booleans: 
~]$ getsebool -a
allow_console_login --> off
allow_cvs_read_shadow --> off
allow_daemons_dump_core --> on
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Run the getsebool boolean-name command to only list the status of the boolean-name Boolean: 
~]$ getsebool allow_console_login
allow_console_login --> off
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Use a space-separated list to list multiple Booleans: 
~]$ getsebool allow_console_login allow_cvs_read_shadow allow_daemons_dump_core
allow_console_login --> off
allow_cvs_read_shadow --> off
allow_daemons_dump_core --> on
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