linux 命令和教程补充

Linux/command/blkid.md

@@ -0,0 +1,95 @@
+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
+
+```shell
+blkid -L | -U
+blkid [-c ] [-ghlLv] [-o] [-s ][-t ] -[w ] [ ...]
+blkid -p [-s ] [-O ] [-S ][-o] ...
+blkid -i [-s ] [-o] ...
+```
+
+###  选项
+
+```shell
+-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：
+
+```shell
+sudo blkid
+```
+
+2、显示指定设备 UUID：
+
+```shell
+sudo blkid -s UUID /dev/sda5
+```
+
+3、显示所有设备 UUID：
+
+```shell
+sudo blkid -s UUID
+```
+
+4、显示指定设备 LABEL：
+
+```shell
+sudo blkid -s LABEL /dev/sda5
+```
+
+5、显示所有设备 LABEL：
+
+```shell
+sudo blkid -s LABEL
+```
+
+6、显示所有设备文件系统：
+
+```shell
+sudo blkid -s TYPE
+```
+
+7、显示所有设备：
+
+```shell
+sudo blkid -o device
+```
+
+8、以列表方式查看详细信息：
+
+```shell
+sudo blkid -o list
+```
+
+