How can you sort a linked list in the C programming language?

There are several common methods for sorting linked lists in C language.

1. Insertion sort: Traverse the list, inserting each node into the appropriate position in the sorted part of the list.
2. Bubble sort: traverse the linked list, compare the values of adjacent nodes, swap positions if they are in the wrong order, until the entire linked list is sorted.
3. Selection sort: Traverse the linked list and each time select the smallest (or largest) node and place it at the end of the sorted portion.
4. Merge sort: By utilizing the divide-and-conquer method, continuously divide a linked list until only one node is left, then continuously merge these sorted linked lists until the entire linked list is finally sorted.
5. Quick sort: Choose a node in the linked list as a pivot, put nodes smaller than the pivot to its left and nodes larger than the pivot to its right, then recursively quick sort the left and right sub-lists.
6. Heap sorting: convert the linked list into a heap, then sequentially take out the top (maximum or minimum) node from the heap and place it in the ordered part, then adjust the heap, until the entire linked list is sorted. These are all common methods for sorting linked lists, the specific choice of method depends on the actual situation and requirements.