直辖变量：
| kern.acct_chkfreq | |||
| kern.acct_configured | |||
| kern.acct_resume | |||
| kern.acct_suspend | |||
| kern.acct_suspended | |||
| kern.always_console_output | |||
| kern.arandom | |||
| kern.argmax | |||
| kern.bootfile | |||
| kern.boottime | |||
| kern.ccpu | |||
| kern.chroot_allow_open_directories | |||
| kern.clockrate | |||
| kern.consmsgbuf_size | |||
| kern.consmute | |||
| kern.console | |||
| kern.constty_wakeups_per_second | |||
| kern.coredump | |||
| kern.corefile | |||
| kern.cp_time | |||
| kern.dirdelay | |||
| kern.disks | |||
| kern.domainname | |||
| kern.drainwait | |||
| kern.dummy | |||
| kern.fallback_elf_brand | |||
| kern.filedelay | |||
| kern.forcesigexit | |||
| kern.fscale | |||
| kern.hostid | |||
| kern.hostname | |||
| kern.hostuuid | |||
| kern.ident | |||
| kern.init_path | |||
| kern.init_shutdown_timeout | |||
| kern.iov_max | |||
| kern.job_control | |||
| kern.kobj_methodcount | |||
| kern.kq_calloutmax | |||
| kern.kstack_pages | |||
| kern.lastpid | |||
| kern.log_console_output | |||
| kern.log_wakeups_per_second | |||
| kern.logsigexit | |||
| kern.malloc_count | |||
| kern.maxfiles | |||
| kern.maxfilesperproc | |||
| kern.maxproc | |||
| kern.maxprocperuid | |||
| kern.maxusers | |||
| kern.maxvnodes | |||
| kern.metadelay | |||
| kern.minvnodes | |||
| kern.module_path | |||
| kern.msgbuf | |||
| kern.msgbuf_clear | |||
| kern.ngroups | |||
| kern.nodump_coredump | |||
| kern.nselcoll | |||
| kern.openfiles | |||
| kern.osreldate | |||
| kern.osrelease | |||
| kern.osrevision | |||
| kern.ostype | |||
| kern.posix1version | |||
| kern.ps_arg_cache_limit | |||
| kern.ps_strings | |||
| kern.randompid | |||
| kern.saved_ids | |||
| kern.securelevel | |||
| kern.stackprot | |||
| kern.sugid_coredump | |||
| kern.sync_on_panic | |||
| kern.tty_nin | |||
| kern.tty_nout | |||
| kern.usrstack | |||
| kern.version |
子树：