Files

1. Rust - write to file
2. Rust - read content of a file as a string
3. Rust - read file line-by-line
4. Rust - read file line-by-line with row number (enumerate)
5. Rust - counter
6. Rust list content of directory
7. Rust list directory content recursively (tree)
8. Count digits in file
9. Makedir
10. Makedirs
11. Get the temporary directory
12. Create temporary directory
13. Current working directory
14. Change directory
15. open file error handling
16. Appand to file
17. Show size of file
18. du - disk usage
19. get file extension
20. parent directory
21. directory ancestors (parent directories)
22. directory ancestor (n level)
23. join pathes
24. basename