Merge pull request #400 from mkwardakov/large-file

Add commands for creating large dummy files

README.md

@@ -293,6 +293,8 @@ mkdir empty && rsync -r --delete empty/ some-dir && rmdir some-dir
    setfacl --restore=permissions.txt
 ```
 
+- To create empty files quickly, use `truncate` (creates [sparse file](https://en.wikipedia.org/wiki/Sparse_file)), `fallocate` (ext4, xfs, btrfs and ocfs2 filesystems), `xfs_mkfile` (almost any filesystems, comes in xfsprogs package), `mkfile` (for Unix-like systems like Solaris, Mac OS).
+
 ## System debugging
 
 - For web debugging, `curl` and `curl -I` are handy, or their `wget` equivalents, or the more modern [`httpie`](https://github.com/jkbrzt/httpie).