I have a file "file.txt" in which some rows begins with numbers.
E.g. file.txt:
1 bla bla 390
23 foo foo 100
# bar bar
some word
45 junk
Is there an easy and fast way to delete the numbers (and the space) from all the lines that start with a number, while deleting only the space from the others?
I would like a command so that the file then looks like:
bla bla 390
foo foo 100
# bar bar
some word
junk