I don't think cut is multi threaded.
BTW:
Running cut -d ':' -f 1 e.g. within a script isn't a good idea, because the delimiter could be different (if an ESSID is included):
PMK * ESSID : PSK
PMK : PSK
In every case, the PMK is first and 64 hex characters in size, so -c -64 is more universal.
BTW:
Running cut -d ':' -f 1 e.g. within a script isn't a good idea, because the delimiter could be different (if an ESSID is included):
PMK * ESSID : PSK
PMK : PSK
In every case, the PMK is first and 64 hex characters in size, so -c -64 is more universal.