1ctdbd_selinux(8) SELinux Policy ctdbd ctdbd_selinux(8)
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6 ctdbd_selinux - Security Enhanced Linux Policy for the ctdbd processes
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9 Security-Enhanced Linux secures the ctdbd processes via flexible manda‐
10 tory access control.
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12 The ctdbd processes execute with the ctdbd_t SELinux type. You can
13 check if you have these processes running by executing the ps command
14 with the -Z qualifier.
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16 For example:
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18 ps -eZ | grep ctdbd_t
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23 The ctdbd_t SELinux type can be entered via the ctdbd_exec_t file type.
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25 The default entrypoint paths for the ctdbd_t domain are the following:
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27 /etc/ctdb/events.d/.*, /usr/sbin/ctdbd, /usr/sbin/ctdbd_wrapper
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30 SELinux defines process types (domains) for each process running on the
31 system
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33 You can see the context of a process using the -Z option to ps
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35 Policy governs the access confined processes have to files. SELinux
36 ctdbd policy is very flexible allowing users to setup their ctdbd pro‐
37 cesses in as secure a method as possible.
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39 The following process types are defined for ctdbd:
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41 ctdbd_t
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43 Note: semanage permissive -a ctdbd_t can be used to make the process
44 type ctdbd_t permissive. SELinux does not deny access to permissive
45 process types, but the AVC (SELinux denials) messages are still gener‐
46 ated.
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50 SELinux policy is customizable based on least access required. ctdbd
51 policy is extremely flexible and has several booleans that allow you to
52 manipulate the policy and run ctdbd with the tightest access possible.
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56 If you want to allow users to resolve user passwd entries directly from
57 ldap rather then using a sssd server, you must turn on the authlo‐
58 gin_nsswitch_use_ldap boolean. Disabled by default.
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60 setsebool -P authlogin_nsswitch_use_ldap 1
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64 If you want to allow all daemons to write corefiles to /, you must turn
65 on the daemons_dump_core boolean. Disabled by default.
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67 setsebool -P daemons_dump_core 1
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71 If you want to enable cluster mode for daemons, you must turn on the
72 daemons_enable_cluster_mode boolean. Enabled by default.
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74 setsebool -P daemons_enable_cluster_mode 1
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78 If you want to allow all daemons to use tcp wrappers, you must turn on
79 the daemons_use_tcp_wrapper boolean. Disabled by default.
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81 setsebool -P daemons_use_tcp_wrapper 1
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85 If you want to allow all daemons the ability to read/write terminals,
86 you must turn on the daemons_use_tty boolean. Disabled by default.
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88 setsebool -P daemons_use_tty 1
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92 If you want to deny any process from ptracing or debugging any other
93 processes, you must turn on the deny_ptrace boolean. Enabled by
94 default.
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96 setsebool -P deny_ptrace 1
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100 If you want to allow any process to mmap any file on system with
101 attribute file_type, you must turn on the domain_can_mmap_files bool‐
102 ean. Enabled by default.
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104 setsebool -P domain_can_mmap_files 1
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108 If you want to allow all domains write to kmsg_device, while kernel is
109 executed with systemd.log_target=kmsg parameter, you must turn on the
110 domain_can_write_kmsg boolean. Disabled by default.
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112 setsebool -P domain_can_write_kmsg 1
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116 If you want to allow all domains to use other domains file descriptors,
117 you must turn on the domain_fd_use boolean. Enabled by default.
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119 setsebool -P domain_fd_use 1
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123 If you want to allow all domains to have the kernel load modules, you
124 must turn on the domain_kernel_load_modules boolean. Disabled by
125 default.
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127 setsebool -P domain_kernel_load_modules 1
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131 If you want to allow all domains to execute in fips_mode, you must turn
132 on the fips_mode boolean. Enabled by default.
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134 setsebool -P fips_mode 1
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138 If you want to enable reading of urandom for all domains, you must turn
139 on the global_ssp boolean. Disabled by default.
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141 setsebool -P global_ssp 1
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145 If you want to allow confined applications to run with kerberos, you
146 must turn on the kerberos_enabled boolean. Enabled by default.
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148 setsebool -P kerberos_enabled 1
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152 If you want to allow system to run with NIS, you must turn on the
153 nis_enabled boolean. Disabled by default.
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155 setsebool -P nis_enabled 1
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159 If you want to allow confined applications to use nscd shared memory,
160 you must turn on the nscd_use_shm boolean. Disabled by default.
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162 setsebool -P nscd_use_shm 1
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166 If you want to support ecryptfs home directories, you must turn on the
167 use_ecryptfs_home_dirs boolean. Disabled by default.
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169 setsebool -P use_ecryptfs_home_dirs 1
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173 If you want to support fusefs home directories, you must turn on the
174 use_fusefs_home_dirs boolean. Disabled by default.
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176 setsebool -P use_fusefs_home_dirs 1
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180 If you want to support NFS home directories, you must turn on the
181 use_nfs_home_dirs boolean. Disabled by default.
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183 setsebool -P use_nfs_home_dirs 1
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187 If you want to support SAMBA home directories, you must turn on the
188 use_samba_home_dirs boolean. Disabled by default.
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190 setsebool -P use_samba_home_dirs 1
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195 SELinux defines port types to represent TCP and UDP ports.
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197 You can see the types associated with a port by using the following
198 command:
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200 semanage port -l
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203 Policy governs the access confined processes have to these ports.
204 SELinux ctdbd policy is very flexible allowing users to setup their
205 ctdbd processes in as secure a method as possible.
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207 The following port types are defined for ctdbd:
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210 ctdb_port_t
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214 Default Defined Ports:
215 tcp 4379
216 udp 4379
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219 The SELinux process type ctdbd_t can manage files labeled with the fol‐
220 lowing file types. The paths listed are the default paths for these
221 file types. Note the processes UID still need to have DAC permissions.
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223 cifs_t
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226 cluster_conf_t
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228 /etc/cluster(/.*)?
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230 cluster_var_lib_t
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232 /var/lib/pcsd(/.*)?
233 /var/lib/cluster(/.*)?
234 /var/lib/openais(/.*)?
235 /var/lib/pengine(/.*)?
236 /var/lib/corosync(/.*)?
237 /usr/lib/heartbeat(/.*)?
238 /var/lib/heartbeat(/.*)?
239 /var/lib/pacemaker(/.*)?
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241 cluster_var_run_t
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243 /var/run/crm(/.*)?
244 /var/run/cman_.*
245 /var/run/rsctmp(/.*)?
246 /var/run/aisexec.*
247 /var/run/heartbeat(/.*)?
248 /var/run/corosync-qnetd(/.*)?
249 /var/run/corosync-qdevice(/.*)?
250 /var/run/cpglockd.pid
251 /var/run/corosync.pid
252 /var/run/rgmanager.pid
253 /var/run/cluster/rgmanager.sk
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255 ctdbd_exec_t
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257 /etc/ctdb/events.d/.*
258 /usr/sbin/ctdbd
259 /usr/sbin/ctdbd_wrapper
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261 ctdbd_spool_t
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263 /var/spool/ctdb(/.*)?
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265 ctdbd_tmp_t
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268 ctdbd_var_lib_t
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270 /var/lib/ctdb(/.*)?
271 /var/lib/ctdbd(/.*)?
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273 ctdbd_var_run_t
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275 /var/run/ctdb(/.*)?
276 /var/run/ctdbd(/.*)?
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278 ctdbd_var_t
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280 /var/ctdb(/.*)?
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282 ecryptfs_t
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284 /home/[^/]+/.Private(/.*)?
285 /home/[^/]+/.ecryptfs(/.*)?
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287 fusefs_t
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289 /var/run/user/[^/]*/gvfs
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291 nfs_t
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294 root_t
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296 /sysroot/ostree/deploy/.*-atomic.*/deploy(/.*)?
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298 /initrd
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300 samba_var_t
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302 /var/nmbd(/.*)?
303 /var/lib/samba(/.*)?
304 /var/cache/samba(/.*)?
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306 systemd_passwd_var_run_t
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308 /var/run/systemd/ask-password(/.*)?
309 /var/run/systemd/ask-password-block(/.*)?
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313 SELinux requires files to have an extended attribute to define the file
314 type.
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316 You can see the context of a file using the -Z option to ls
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318 Policy governs the access confined processes have to these files.
319 SELinux ctdbd policy is very flexible allowing users to setup their
320 ctdbd processes in as secure a method as possible.
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322 EQUIVALENCE DIRECTORIES
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325 ctdbd policy stores data with multiple different file context types
326 under the /var/run/ctdb directory. If you would like to store the data
327 in a different directory you can use the semanage command to create an
328 equivalence mapping. If you wanted to store this data under the /srv
329 dirctory you would execute the following command:
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331 semanage fcontext -a -e /var/run/ctdb /srv/ctdb
332 restorecon -R -v /srv/ctdb
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334 ctdbd policy stores data with multiple different file context types
335 under the /var/lib/ctdb directory. If you would like to store the data
336 in a different directory you can use the semanage command to create an
337 equivalence mapping. If you wanted to store this data under the /srv
338 dirctory you would execute the following command:
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340 semanage fcontext -a -e /var/lib/ctdb /srv/ctdb
341 restorecon -R -v /srv/ctdb
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343 STANDARD FILE CONTEXT
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345 SELinux defines the file context types for the ctdbd, if you wanted to
346 store files with these types in a diffent paths, you need to execute
347 the semanage command to sepecify alternate labeling and then use
348 restorecon to put the labels on disk.
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350 semanage fcontext -a -t ctdbd_var_t '/srv/myctdbd_content(/.*)?'
351 restorecon -R -v /srv/myctdbd_content
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353 Note: SELinux often uses regular expressions to specify labels that
354 match multiple files.
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356 The following file types are defined for ctdbd:
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360 ctdbd_exec_t
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362 - Set files with the ctdbd_exec_t type, if you want to transition an
363 executable to the ctdbd_t domain.
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366 Paths:
367 /etc/ctdb/events.d/.*, /usr/sbin/ctdbd, /usr/sbin/ctdbd_wrapper
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369
370 ctdbd_initrc_exec_t
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372 - Set files with the ctdbd_initrc_exec_t type, if you want to transi‐
373 tion an executable to the ctdbd_initrc_t domain.
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377 ctdbd_log_t
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379 - Set files with the ctdbd_log_t type, if you want to treat the data as
380 ctdbd log data, usually stored under the /var/log directory.
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383 Paths:
384 /var/log/ctdb.log.*, /var/log/log.ctdb.*
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387 ctdbd_spool_t
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389 - Set files with the ctdbd_spool_t type, if you want to store the ctdbd
390 files under the /var/spool directory.
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394 ctdbd_tmp_t
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396 - Set files with the ctdbd_tmp_t type, if you want to store ctdbd tem‐
397 porary files in the /tmp directories.
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401 ctdbd_var_lib_t
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403 - Set files with the ctdbd_var_lib_t type, if you want to store the
404 ctdbd files under the /var/lib directory.
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407 Paths:
408 /var/lib/ctdb(/.*)?, /var/lib/ctdbd(/.*)?
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410
411 ctdbd_var_run_t
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413 - Set files with the ctdbd_var_run_t type, if you want to store the
414 ctdbd files under the /run or /var/run directory.
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417 Paths:
418 /var/run/ctdb(/.*)?, /var/run/ctdbd(/.*)?
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421 ctdbd_var_t
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423 - Set files with the ctdbd_var_t type, if you want to store the c files
424 under the /var directory.
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428 Note: File context can be temporarily modified with the chcon command.
429 If you want to permanently change the file context you need to use the
430 semanage fcontext command. This will modify the SELinux labeling data‐
431 base. You will need to use restorecon to apply the labels.
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435 semanage fcontext can also be used to manipulate default file context
436 mappings.
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438 semanage permissive can also be used to manipulate whether or not a
439 process type is permissive.
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441 semanage module can also be used to enable/disable/install/remove pol‐
442 icy modules.
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444 semanage port can also be used to manipulate the port definitions
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446 semanage boolean can also be used to manipulate the booleans
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449 system-config-selinux is a GUI tool available to customize SELinux pol‐
450 icy settings.
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454 This manual page was auto-generated using sepolicy manpage .
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458 selinux(8), ctdbd(8), semanage(8), restorecon(8), chcon(1), sepolicy(8)
459 , setsebool(8)
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463ctdbd 19-04-25 ctdbd_selinux(8)