/usr/share/zsh/help/alias is in zsh-common 5.3.1-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | alias [ {+|-}gmrsL ] [ name[=value] ... ]
For each name with a corresponding value, define an alias with
that value. A trailing space in value causes the next word to
be checked for alias expansion. If the -g flag is present,
define a global alias; global aliases are expanded even if they
do not occur in command position.
If the -s flag is present, define a suffix alias: if the command
word on a command line is in the form `text.name', where text is
any non-empty string, it is replaced by the text `value
text.name'. Note that name is treated as a literal string, not
a pattern. A trailing space in value is not special in this
case. For example,
alias -s ps=gv
will cause the command `*.ps' to be expanded to `gv *.ps'. As
alias expansion is carried out earlier than globbing, the `*.ps'
will then be expanded. Suffix aliases constitute a different
name space from other aliases (so in the above example it is
still possible to create an alias for the command ps) and the
two sets are never listed together.
For each name with no value, print the value of name, if any.
With no arguments, print all currently defined aliases other
than suffix aliases. If the -m flag is given the arguments are
taken as patterns (they should be quoted to preserve them from
being interpreted as glob patterns), and the aliases matching
these patterns are printed. When printing aliases and one of
the -g, -r or -s flags is present, restrict the printing to
global, regular or suffix aliases, respectively; a regular alias
is one which is neither a global nor a suffix alias. Using `+'
instead of `-', or ending the option list with a single `+',
prevents the values of the aliases from being printed.
If the -L flag is present, then print each alias in a manner
suitable for putting in a startup script. The exit status is
nonzero if a name (with no value) is given for which no alias
has been defined.
For more on aliases, include common problems, see the section
ALIASING in zshmisc(1).
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