How to root an ICS tablet use just adb

[fai@home-desktop tmp]$ adb shell
shell@android:/ $ mv /data/local/tmp /data/local/tmp.bak
shell@android:/ $ ln -s /data /data/local/tmp
[fai@home-desktop tmp]$ adb reboot
[fai@home-desktop tmp]$ adb wait-for-device

[fai@home-desktop tmp]$ adb shell
shell@android:/ $ echo ro.kernel.qemu=1 > /data/local.prop
shell@android:/ $ exit
[fai@home-desktop tmp]$ adb reboot
[fai@home-desktop tmp]$ adb wait-for-device
[fai@home-desktop tmp]$ adb remount
remount succeeded
[fai@home-desktop tmp]$ adb push su /system/bin/su
518 KB/s (22364 bytes in 0.042s)

[fai@home-desktop tmp]$ adb shell
root@android:/ # chown root.shell /system/bin/su
root@android:/ # chmod 06755 /system/bin/su
root@android:/ # rm /system/xbin/su
rm failed for /system/xbin/su, No such file or directory
255|root@android:/ # ln -s /system/bin/su /system/xbin/su
root@android:/ # exit
[fai@home-desktop tmp]$ adb push Superuser.apk /system/app/.
3923 KB/s (843503 bytes in 0.209s)

[fai@home-desktop tmp]$ adb shell
root@android:/ # rm /data/local.prop
root@android:/ # rm /data/local/tmp
root@android:/ # mv /data/local/tmp.bak /data/local/tmp
root@android:/ # exit
[fai@home-desktop tmp]$ adb push busybox /data/local/tmp/.
1956 KB/s (1075144 bytes in 0.536s)

[fai@home-desktop tmp]$ adb shell
root@android:/ # chmod 755 /data/local/tmp/busybox
root@android:/ # /data/local/tmp/busybox mount -o remount,rw /system
root@android:/ # dd if=/data/local/tmp/busybox of=/system/xbin/busybox
2099+1 records in
2099+1 records out
1075144 bytes transferred in 0.063 secs (17065777 bytes/sec)
root@android:/ # chown root.shell /system/xbin/busybox
root@android:/ # chmod 04755 /system/xbin/busybox
root@android:/ # /system/xbin/busybox --install -s /system/xbin
root@android:/ # rm -r /data/local/tmp/busybox
root@android:/ # sync
root@android:/ # exit
[fai@home-desktop tmp]$ adb reboot