Aliases are commands that expand to a longer input line. For
example, ll is a common alias for ls
-l, and would be defined with the command invocation
‘alias ll ls -l’; with this defined,
running ‘ll foo’ in Eshell will actually
run ‘ls -l foo’. Aliases defined (or
deleted) by the alias command are automatically
written to the file named by eshell-aliases-file,
which you can also edit directly (although you will have to
manually reload it).