# blkid

查看块设备的文件系统类型、LABEL、UUID等信息

## 补充说明

在Linux下可以使用 **blkid命令** 对查询设备上所采用文件系统类型进行查询。blkid主要用来对系统的块设备（包括交换分区）所使用的文件系统类型、LABEL、UUID等信息进行查询。要使用这个命令必须安装e2fsprogs软件包。

### 语法

```
blkid -L | -U
blkid [-c ] [-ghlLv] [-o] [-s ][-t ] -[w ] [ ...]
blkid -p [-s ] [-O ] [-S ][-o] ...
blkid -i [-s ] [-o] ...
```

### 选项

```
-c <file>   # 指定cache文件(default: /etc/blkid.tab, /dev/null = none)
-d          # don't encode non-printing characters
-h          # 显示帮助信息
-g          # garbage collect the blkid cache
-o <format> # 指定输出格式
-k          # list all known filesystems/RAIDs and exit
-s <tag>    # 显示指定信息，默认显示所有信息
-t <token>  # find device with a specific token (NAME=value pair)
-l          # look up only first device with token specified by -t
-L <label>  # convert LABEL to device name
-U <uuid>   # convert UUID to device name
-v          # 显示版本信息
-w <file>   # write cache to different file (/dev/null = no write)
<dev>       # specify device(s) to probe (default: all devices)
Low-level probing options:
-p          # low-level superblocks probing (bypass cache)
-i          # gather information about I/O limits
-S <size>   # overwrite device size
-O <offset> # probe at the given offset
-u <list>   # filter by "usage" (e.g. -u filesystem,raid)
-n <list>   # filter by filesystem type (e.g. -n vfat,ext3)
```

### 实例

1、列出当前系统中所有已挂载文件系统的类型：

```
sudo blkid
```

2、显示指定设备 UUID：

```
sudo blkid -s UUID /dev/sda5
```

3、显示所有设备 UUID：

```
sudo blkid -s UUID
```

4、显示指定设备 LABEL：

```
sudo blkid -s LABEL /dev/sda5
```

5、显示所有设备 LABEL：

```
sudo blkid -s LABEL
```

6、显示所有设备文件系统：

```
sudo blkid -s TYPE
```

7、显示所有设备：

```
sudo blkid -o device
```

8、以列表方式查看详细信息：

```
sudo blkid -o list
```


---

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