working on this “easy” chal since 2 day … well not so easy in reality .
still hanging , i tried hex , tried all i could with the poor characters authorized and specials for shell (<, # , {} , ', ",,/ ) , but i can’t find a substitute to the ; or && … i succeded to counter the space character problem but impossible to execute a command right after escaping the arithmetic expansion …
The link they shared seems to be gone so here’s the webarchive
https://web.archive.org/web/20100425010938/http://wiki.bash-hackers.org/syntax/expansion/cmdsubst
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