Basically you can kill cgminer process and then start manually another cgminer process with your arguments according to this post
https://bitcointalk.org/index.php?topic=486808.msg5417609#msg5417609, then you will see cgminer output.
If you add all command parameters as seen in /mineros/boot.py then web interface works after restart of cgminer:
cgminer -- --text-only --lowmem --bitmine-a1-options '+a1_options+' -o '+row[1]+' -O '+row[2]+':'+row[3]+' -o '+row[4]+' -O '+row[5]+':'+row[6]+' -o '+row[7]+' -O '+row[8]+':'+row[9]+' '+row[10]+' --api-allow '+row[12]+' --api-listen --queue 50 '+row[13]
Substitute row[number] with value from corresponding row on the miner settings page in web interface.
If I understand correctly you suggest killing the cgminer process and then running again cgminer from command line?
That would probably work, but
a) I'm not sure if everything else will work (e.g. web interface)
b) If I log out, the process would kill itself. I could maybe keep it running with screen, but screen is not installed in this distribution.