1prelink_cron_system_selSiEnLuixn(u8x)Policy prelink_cronp_rseylsitnekm_cron_system_selinux(8)
2
6 prelink_cron_system_selinux - Security Enhanced Linux Policy for the
7 prelink_cron_system processes
8
10 Security-Enhanced Linux secures the prelink_cron_system processes via
11 flexible mandatory access control.
12 The prelink_cron_system processes execute with the prelink_cron_sys‐
14 tem_t SELinux type. You can check if you have these processes running
15 by executing the ps command with the -Z qualifier.
16 For example:
18 ps -eZ | grep prelink_cron_system_t
20
24 The prelink_cron_system_t SELinux type can be entered via the pre‐
25 link_cron_system_exec_t file type.
26 The default entrypoint paths for the prelink_cron_system_t domain are
28 the following:
29 /etc/cron.daily/prelink
31
33 SELinux defines process types (domains) for each process running on the
34 system
35 You can see the context of a process using the -Z option to ps
37 Policy governs the access confined processes have to files. SELinux
39 prelink_cron_system policy is very flexible allowing users to setup
40 their prelink_cron_system processes in as secure a method as possible.
41 The following process types are defined for prelink_cron_system:
43 prelink_cron_system_t
45 Note: semanage permissive -a prelink_cron_system_t can be used to make
47 the process type prelink_cron_system_t permissive. SELinux does not
48 deny access to permissive process types, but the AVC (SELinux denials)
49 messages are still generated.
50
53 SELinux policy is customizable based on least access required. pre‐
54 link_cron_system policy is extremely flexible and has several booleans
55 that allow you to manipulate the policy and run prelink_cron_system
56 with the tightest access possible.
57 If you want to allow users to resolve user passwd entries directly from
61 ldap rather then using a sssd server, you must turn on the authlo‐
62 gin_nsswitch_use_ldap boolean. Disabled by default.
63 setsebool -P authlogin_nsswitch_use_ldap 1
65 If you want to deny any process from ptracing or debugging any other
69 processes, you must turn on the deny_ptrace boolean. Enabled by
70 default.
71 setsebool -P deny_ptrace 1
73 If you want to allow any process to mmap any file on system with
77 attribute file_type, you must turn on the domain_can_mmap_files bool‐
78 ean. Enabled by default.
79 setsebool -P domain_can_mmap_files 1
81 If you want to allow all domains write to kmsg_device, while kernel is
85 executed with systemd.log_target=kmsg parameter, you must turn on the
86 domain_can_write_kmsg boolean. Disabled by default.
87 setsebool -P domain_can_write_kmsg 1
89 If you want to allow all domains to use other domains file descriptors,
93 you must turn on the domain_fd_use boolean. Enabled by default.
94 setsebool -P domain_fd_use 1
96 If you want to allow all domains to have the kernel load modules, you
100 must turn on the domain_kernel_load_modules boolean. Disabled by
101 default.
102 setsebool -P domain_kernel_load_modules 1
104 If you want to allow all domains to execute in fips_mode, you must turn
108 on the fips_mode boolean. Enabled by default.
109 setsebool -P fips_mode 1
111 If you want to enable reading of urandom for all domains, you must turn
115 on the global_ssp boolean. Disabled by default.
116 setsebool -P global_ssp 1
118 If you want to allow confined applications to run with kerberos, you
122 must turn on the kerberos_enabled boolean. Enabled by default.
123 setsebool -P kerberos_enabled 1
125 If you want to allow system to run with NIS, you must turn on the
129 nis_enabled boolean. Disabled by default.
130 setsebool -P nis_enabled 1
132 If you want to allow confined applications to use nscd shared memory,
136 you must turn on the nscd_use_shm boolean. Disabled by default.
137 setsebool -P nscd_use_shm 1
139
143 The SELinux process type prelink_cron_system_t can manage files labeled
144 with the following file types. The paths listed are the default paths
145 for these file types. Note the processes UID still need to have DAC
146 permissions.
147 prelink_log_t
149 /var/log/prelink(/.*)?
151 /var/log/prelink.log.*
152 prelink_var_lib_t
154 /var/lib/prelink(/.*)?
156 /var/lib/misc/prelink.*
157 systemd_passwd_var_run_t
159 /var/run/systemd/ask-password(/.*)?
161 /var/run/systemd/ask-password-block(/.*)?
162
165 SELinux requires files to have an extended attribute to define the file
166 type.
167 You can see the context of a file using the -Z option to ls
169 Policy governs the access confined processes have to these files.
171 SELinux prelink_cron_system policy is very flexible allowing users to
172 setup their prelink_cron_system processes in as secure a method as pos‐
173 sible.
174 The following file types are defined for prelink_cron_system:
176 prelink_cron_system_exec_t
180 - Set files with the prelink_cron_system_exec_t type, if you want to
182 transition an executable to the prelink_cron_system_t domain.
183 Note: File context can be temporarily modified with the chcon command.
187 If you want to permanently change the file context you need to use the
188 semanage fcontext command. This will modify the SELinux labeling data‐
189 base. You will need to use restorecon to apply the labels.
190
193 semanage fcontext can also be used to manipulate default file context
194 mappings.
195 semanage permissive can also be used to manipulate whether or not a
197 process type is permissive.
198 semanage module can also be used to enable/disable/install/remove pol‐
200 icy modules.
201 semanage boolean can also be used to manipulate the booleans
203 system-config-selinux is a GUI tool available to customize SELinux pol‐
206 icy settings.
207
210 This manual page was auto-generated using sepolicy manpage .
211
214 selinux(8), prelink_cron_system(8), semanage(8), restorecon(8),
215 chcon(1), sepolicy(8) , setsebool(8)
216prelink_cron_system 19-04-25 prelink_cron_system_selinux(8)