README güncellemesi

README.md

 # for install
 `make install DESTDIR=/`
 
-# usage
-update-initrd KERNELVER=yourversion MODDIR=yourmoddir 
+# basic usage
+`update-initrd KERNELVER=xxxx MODDIR=/lib/modules/xxxx OUTPUT=/boot/initrd.img-xxxx`
+
+# boot modes
+```
+boot=classic : Booting from installed system
+boot=normal  : Booting from installed system but / as tmpfs (All directories binded)
+boot=live    : Live boot mode. Search main.sfs (see also sfs=xxx) file and mount overlayfs
+boot=freeze  : Frozen mode. Booting from installed system but / as overlayfs (changes never saved)
+```
+# boot parameters
+```
+sfs=xxx      : Search xxx and used for booting from live rootfs
+LANG=xxx     : Change language (initrd and system)
+root=xxx     : Change rootfs localion or uuid
+debug        : Write debug logs
+quiet        : No output mode (Only error logs writed)
+ro           : mount filesystem as read-only
+rw           : mount filesystem as read-write
+```
+