/usr/bin/rpi-update: 1: /usr/bin/rpi-update: Not: not found

[Tuinslak]

Getthis an issue with rpi-update not found:

./rpi2strap.py /dev/sdf
Welcome to RPi2strap!
This is your last chance to abort!
Your sdcard is /dev/sdf. Is that right? [yN] 
y
Delete MBR and partition table and create a new one.
Create filesystems.
Mount filesystems.
Install debian. First stage. This will take some minutes.
Second stage. Again, please wait some minutes.
You can safely ignore the perl and locale warnings.
Configure the system.
Enter rpi root password: 
Repeat: 
Update the system.
Install rpi-update and raspi-config package.
Install kernel and modules.
***********************************************
* Error! Please check the following messages! *
*         Your system will NOT boot!          *
***********************************************

/usr/bin/rpi-update: 1: /usr/bin/rpi-update: Not: not found