The du (disk usage) command is a Unix/Linux command that estimates file space usage.
du -hsc *
lists the file and directory sizes of the current working directory.
- h = show sizes in human readable format (1K, 1M, 1G, …)
- s = summarize the totals for each argument
- c = display a grand total
For example running du -hsc * in my current directory lists all the sam files, their sizes, and the total size of the directory.
I’m running a HISAT2 alignment, so when I checked a few minutes later, I can see the sam files are bigger and closer to being done.
This is also an easy way to check if a file is empty or how file sizes compare to each other.