I have installed a Debian. I rsynced it. I load it on my client through PXE from NFS to make a backup. But I need my Computer(NFS-host) at the same time to make something other with it. For example, sometimes I like to use my Computer(host) in other room, so I do not like to leave it there.When I disconnect it from NFS, the system freezes. The idea came across my mind that I will remount the root filesystem from USB and than will I disconnect from the server. I was thinking, I will use a USB stick, with same immutable (/bin) files, and I will load all mutable devices/files (/proc, /var) in memory.What do you recommend?  proc            /proc           ramfs   nodev,noexec.nosuid     0       0  none            /tmp            ramfs   defaults        0       0  none            /var/run        ramfs   defaults        0       0  none            /var/lock       ramfs   defaults        0       0  none            /var/tmp        ramfs   defaults        0       0  none            /var/log        ramfs   defaults        0       0  /dev/nfs        /               nfs     defaults        1       1  I changed the last line to:  /dev/sda1        /               ext4    errors=remount-ro         0       0  mount -o -remount /  /dev/sda1 on / type ext4 (ro,errors=remount-ro)  [  220.880314] EXT4-fs (sda1): mounted filesystem with ordered data mode  But the system is still hanging.If I pull back the cable then it's all right.
PXE USB BOOT Debian
debian;boot;usb;pxe