Cmdline Option in Linux

[Aman]

Hi All

I have a question relating to the cmdline option ie root=console=dev/null.
When we specify the console=/dev/null how is this implemented. One more
question  is there anyway we can change the cmdline options after the Linux
kernel boots i.e. if I want to specify the console = /dev/ttyS0. Can anybody
help me in understanding this cmdline.

Thanking you in advance
Regards
Aman


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