I just installed nemo and I am displaying the octal permission field. The permissions are things like 40755 and 100755. I am familiar with the last three digits (755) and I assume those are rwx permissions for owner, group and everyone else. What are the prefix permissions - the 40 and the 100 in my example?
They are the file type. 10 is a fifo, and 40 is a directory. From