bash:
selection=${selection#/}
as in (omitting the bash $ prompt, as it seems to confuse things when present)
selection=/home/xx/yy
selection=${selection#/}
echo $selection
home/xx/yy
selection=${selection#/}
echo $selection
home/xx/yy
Why?
${thing#pattern}
If pattern matches the thing, delete the shortest match else do nothing.
In the second instance above, there is no match, so no change. pattern
is glob-like. ## is largest match. % and %% work on the right end of
thing.
C-like shells: I have no idea (since I hate C, I hate C-like shells).
