如果我理解正确的话，在 Linux 中，一切都是一条路径，一直延伸到每一块硬件。我正在尝试获取有关传感器结构的信息，所以我想我会使用树来映射我的 hwmon 目录中的所有内容。但是，tree 在此目录中的行为与我习惯的不同。
当我在普通目录上运行树时，我得到子目录结构而不使用 -R 或 -L 标志：
$ tree /home
/home
└── boss
├── clones
├── Desktop
├── Documents
│ ├── modules.txt
│ ├── old_docs
│ │ └── assorted
│ └── prepscript.txt
├── Downloads
├── Music
├── Pictures
├── Public
├── Templates
└── Videos
12 directories, 2 files
但是我尝试对 HWmon 做同样的事情，即使我确实使用了 -R 标志并且即使有更深的东西，它也只会深入一层：
$ tree /sys/class/hwmon/
/sys/class/hwmon/
├── hwmon0 -> ../../devices/pci0000:40/0000:40:01.3/0000:43:00.0/hwmon/hwmon0
├── hwmon1 -> ../../devices/pci0000:00/0000:00:01.3/0000:09:00.0/hwmon/hwmon1
├── hwmon2 -> ../../devices/pci0000:40/0000:40:03.1/0000:44:00.0/hwmon/hwmon2
├── hwmon3 -> ../../devices/pci0000:00/0000:00:18.3/hwmon/hwmon3
├── hwmon4 -> ../../devices/pci0000:00/0000:00:19.3/hwmon/hwmon4
├── hwmon5 -> ../../devices/virtual/thermal/thermal_zone0/hwmon5
└── hwmon6 -> ../../devices/platform/nct6775.656/hwmon/hwmon6
7 directories, 0 files
$ tree /sys/class/hwmon/hwmon0
/sys/class/hwmon/hwmon0
├── device -> ../../../0000:43:00.0
├── fan1_input
├── name
├── power
│ ├── async
│ ├── autosuspend_delay_ms
│ ├── control
│ ├── runtime_active_kids
│ ├── runtime_active_time
│ ├── runtime_enabled
│ ├── runtime_status
│ ├── runtime_suspended_time
│ └── runtime_usage
├── pwm1
├── pwm1_enable
├── pwm1_max
├── pwm1_min
├── subsystem -> ../../../../../../class/hwmon
├── temp1_auto_point1_pwm
├── temp1_auto_point1_temp
├── temp1_auto_point1_temp_hyst
├── temp1_crit
├── temp1_crit_hyst
├── temp1_emergency
├── temp1_emergency_hyst
├── temp1_input
├── temp1_max
├── temp1_max_hyst
├── uevent
└── update_interval
3 directories, 27 files
是什么导致了这种行为差异，我可以得到所有设备的简单树吗？
tree这样做是因为默认情况下它不会取消引用符号链接。该-l选项将改变：但是你会很有趣地理解所有的输出。