Cnclinux do not find harddisk

thanks for reply to me,
I am using 2.7.15 version of linuxcnc , I want to update from 2.7.15 to 2.9.3,but Debian terminal does not take code like sudo apt install .... or sudo apt update /upgradeI.Debian send to message me thar Terminal is locked to code
gooddays

2.7.n is probably Debian Wheezy, so it can not be upgraded to 2.9.3 due to changes in Python, mostly.
For Wheezy, you need to use
sudo apt-get update
sudo apt-get upgrade
It might just upgrade to 2.8.n as that was the last Python 2 version of LinuxCNC, although Wheezy has reached it's "end of life" a long time ago so no more updates for it.
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You can install the new 2.9.3 from the downloads page, and if it tells you it can not find files/usb device, just unplug the USB, wait 5 seconds, plug in the USB, wait 10 seconds, click on continue/next.
Be aware that if using an old PC, it is much better to use the Ubintu version i linked above or the existing Wheezy version as they use RTAI kernel, while the new ones use RT-Preempt kernels and thy will have worse latency on old systems.

Recently I had to install linuxcnc on a previously win11 installed hard drive, it was not possible , setup refused to make partitions for new sistem.

Solution was to go into live mode and then from Gparted delete all previous partitions on hard drive, then the install went without problems.