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lang-bash
||is the opposite of&&: the RHS is executed if the LHS does not succeed:false || echo yes # prints "yes"&&the linked commands form a compound command which is jointly backgrounded subsequent&whereas the;being two sequential commands will wait for completion of the first command before a trailing&will background the second command.sleep 5s && sleep 5s & echo "waited 0s"vs"sleep 5s; sleep 5s & echo "waited 5s"