1e41f4b71Sopenharmony_ci# umount 2e41f4b71Sopenharmony_ci 3e41f4b71Sopenharmony_ci 4e41f4b71Sopenharmony_ci## 命令功能 5e41f4b71Sopenharmony_ci 6e41f4b71Sopenharmony_ciumount命令用来卸载指定文件系统。 7e41f4b71Sopenharmony_ci 8e41f4b71Sopenharmony_ci 9e41f4b71Sopenharmony_ci## 命令格式 10e41f4b71Sopenharmony_ci 11e41f4b71Sopenharmony_ciumount [_-a [-t TYPE]_] [_dir_] 12e41f4b71Sopenharmony_ci 13e41f4b71Sopenharmony_ci 14e41f4b71Sopenharmony_ci## 参数说明 15e41f4b71Sopenharmony_ci 16e41f4b71Sopenharmony_ci**表1** 参数说明 17e41f4b71Sopenharmony_ci 18e41f4b71Sopenharmony_ci| 参数 | 参数说明 | 取值范围 | 19e41f4b71Sopenharmony_ci| ------ | ------------------------------------------------------------ | -------------------------- | 20e41f4b71Sopenharmony_ci| --help | 查看umount命令支持的参数列表。 | N/A | 21e41f4b71Sopenharmony_ci| -a | 卸载所有已挂载的目录。 | N/A | 22e41f4b71Sopenharmony_ci| -t | 同-a选项一起使用，限制-a的卸载范围，只卸载-t所指定的文件系统类型的挂载目录。 | N/A | 23e41f4b71Sopenharmony_ci| dir | 需要卸载的文件系统对应的目录。 | 系统已挂载的文件系统的目录 | 24e41f4b71Sopenharmony_ci 25e41f4b71Sopenharmony_ci 26e41f4b71Sopenharmony_ci## 使用指南 27e41f4b71Sopenharmony_ci 28e41f4b71Sopenharmony_ciumount后加上需要卸载的指定文件系统的目录，即将指定文件系统卸载。 29e41f4b71Sopenharmony_ci 30e41f4b71Sopenharmony_ci## 特殊说明 31e41f4b71Sopenharmony_ci 32e41f4b71Sopenharmony_ci参数shell端暂不支持。切换mksh版本可全支持，方法：cd bin; ./mksh。 33e41f4b71Sopenharmony_ci 34e41f4b71Sopenharmony_ci## 使用实例 35e41f4b71Sopenharmony_ci 36e41f4b71Sopenharmony_ci举例： 37e41f4b71Sopenharmony_ci 38e41f4b71Sopenharmony_ci- umount ./nfs 39e41f4b71Sopenharmony_ci 40e41f4b71Sopenharmony_ci- umount -a -t nfs 41e41f4b71Sopenharmony_ci 42e41f4b71Sopenharmony_ci 43e41f4b71Sopenharmony_ci## 输出说明 44e41f4b71Sopenharmony_ci 45e41f4b71Sopenharmony_ci将已在./nfs挂载的文件系统卸载掉 46e41f4b71Sopenharmony_ci 47e41f4b71Sopenharmony_ci**示例1** umount输出示例 48e41f4b71Sopenharmony_ci 49e41f4b71Sopenharmony_ci 50e41f4b71Sopenharmony_ci``` 51e41f4b71Sopenharmony_ciOHOS:/$ umount ./nfs/ 52e41f4b71Sopenharmony_ciumount ok 53e41f4b71Sopenharmony_ci``` 54e41f4b71Sopenharmony_ci 55e41f4b71Sopenharmony_ci**示例2** 卸载所有已挂载的nfs类型的目录 56e41f4b71Sopenharmony_ci 57e41f4b71Sopenharmony_ci 58e41f4b71Sopenharmony_ci``` 59e41f4b71Sopenharmony_ciOHOS:/$ umount -a -t nfs 60e41f4b71Sopenharmony_ciumount ok 61e41f4b71Sopenharmony_ci```