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lang-bash
if [ check_that_your_variables_are_defined ] ; then eval your_variables ; else loop fsayd ; filoop fsaydis a very simple command that can be substituted byecho hiif you want to test it yourself. The problem is that it needs to be substituted as"loop" "fsayd"but it is substituted as"loop fsayd"which causes acommand not founderror.echo hi). Forecho hia doubleeval eval ${...}works, but I don't know what would be the other case.