I want to get the maximum of -S --skip before running hashcat

[hashcat-study]

This is the command and return that I run.

root@gpu2-MS-7B53:~# hashcat -V
v5.1.0-1183-g32cb1918+
root@gpu2-MS-7B53:~# hashcat -m 0 -a 3 eb009cefa9759b10d7bbd5cc969d95e5 ?a?a?a?a?a --keyspace
Usage: hashcat [options]... hash|hashfile|hccapxfile [dictionary|mask|directory]...

Try --help for more help.
root@gpu2-MS-7B53:~# hashcat --keyspace -m 0 -a 3 eb009cefa9759b10d7bbd5cc969d95e5 ?a?a?a?a?a
Usage: hashcat [options]... hash|hashfile|hccapxfile [dictionary|mask|directory]...

Try --help for more help.
root@gpu2-MS-7B53:~#