Use a TF card in ubuntu

Using a TF card in ubuntu records the problem of using a TF card in ubuntu. Using a TF card in windows is normal, in ubuntu, it becomes 63M. After using the Shell code sudo fdisk/dev/sdb, it is used for interactive command line operations. Use p to display the current partition. Use d command to delete all partitions. Use o command. change to a compatible partition table structure or use c, I have not studied how to use the command. I have added a guide to use the w command to save and exit the q command. If I do not save and exit the intermediate operation, I will encounter some errors (such as the device is busy ), please try the following method to complete a command, such as o, w save and exit, and then re-run fdisk into the command, then use d to delete completely, w save, re-enter the operation partition and format it as a file system. The key word mkfs/dev/sdb is the TF card, And/dev/sdb1 is the first partition, after/dev/sdb2 is the second fdisk partition, both ubuntu and windows are normal.