How can I search part of address using bitcrack, for example search for "16jY7" or how can I do a linear search instead of random using vanity?
BitCrack can not search "16jY7" , you use vanity to find is correct tools
I think vanitysearch tools are not random but seed start is random and continue unfortunate can not custom seed start search
try using other modify/fork of vanitysearch like bit crack many developers modify
https://github.com/WanderingPhilosopher/VanBitCrakcenShttps://github.com/Telariust/VanitySearch-bitcrackThese tools can search "16jY7" in the range you want