(a) 
image=/boot/zImage 
label=rtlinux-0.6 
root=/dev/hda2 
read-only 
  
(b)
image=/boot/zImage 
label=rtlinux-0.6 
root=/dev/hda2 
read-only 
append="mem=31m" 
  
(c) 
image=/boot/zImage 
label=rtlinux-0.6 
root=/dev/hda2 
read-only 
append="mem=15872k" 

Example 1: (a) Original /etc/lilo.conf file; (b) modified file for 31 MB; (c) modified file for 15872 KB.