DD only with if

BsDjUsTbSd

BsDjUsTbSd

Today i accidently run dd with only if and no output. it displayed lots of weird characters and symbols and said 20mb copied(from an iso). Did it damage anything the system boots fine.
I am not worried for that small 20mb but rather if it deleted something to put the 20MB there.
 
Thanks comrade for assuring me that i am safe. However next time i should watch more what i do because it could truly be a disaster one day
 
A: Read and understand the documentation of dd before using it. Admittedly, it has a pretty weird way of specifying parameters and options (namely input and output files), which is very non-unixish.

B: As long as you are not running as root, it is very difficult to do serious damage to the OS as a whole.
 
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