Use platforms-specific attributes for gs()
Add gu git alias

Stage changes in a files under version control (no untracked
files).
Show totals on "free" alias
Add mkcd() function

Makes a directory and cd into it.
Colorize output of grep by default
Alias tabulated mount output as "mnt"
Add "path" alias

Print content of $PATH environment variable one path per line.
Add "pps" alias

Display ps entries that match regular expression.
Group directories in "l" alias output
Reuse "l" alias in "ll" alias
Introduce "lla" and "lld" aliases

Just shortcuts for "ll" alias followed by a/d flags.
Reuse "gwd" alias in "gwdc" alias definition