RASPBERRY

Removing 'diversion of /boot/overlays/hifiberry-dacplus.dtbo to /usr/share/rpikernelhack/overlays/hifiberry-dacplus.dtbo by rpikernelhack'
dpkg-divert: error: error checking '/usr/share/rpikernelhack/overlays/hifiberry-dacplus.dtbo': Read-only file system
/var/lib/dpkg/info/raspberrypi-kernel.postinst: 220: /var/lib/dpkg/info/raspberrypi-kernel.postinst: sync: Input/output error
/var/lib/dpkg/info/raspberrypi-kernel.postinst: 223: /var/lib/dpkg/info/raspberrypi-kernel.postinst: rm: Input/output error
Bus error
/var/lib/dpkg/info/raspberrypi-kernel.postinst: 225: /var/lib/dpkg/info/raspberrypi-kernel.postinst: sync: Input/output error
/var/lib/dpkg/info/raspberrypi-kernel.postinst: 228: /var/lib/dpkg/info/raspberrypi-kernel.postinst: rm: Input/output error
Bus error
/var/lib/dpkg/info/raspberrypi-kernel.postinst: 230: /var/lib/dpkg/info/raspberrypi-kernel.postinst: sync: Input/output error
/var/lib/dpkg/info/raspberrypi-kernel.postinst: 233: /var/lib/dpkg/info/raspberrypi-kernel.postinst: rm: Input/output error
Bus error
/var/lib/dpkg/info/raspberrypi-kernel.postinst: 235: /var/lib/dpkg/info/raspberrypi-kernel.postinst: sync: Input/output error
/var/lib/dpkg/info/raspberrypi-kernel.postinst: 238: /var/lib/dpkg/info/raspberrypi-kernel.postinst: rm: Input/output error
Bus error
/var/lib/dpkg/info/raspberrypi-kernel.postinst: 240: /var/lib/dpkg/info/raspberrypi-kernel.postinst: sync: Input/output error
/var/lib/dpkg/info/raspberrypi-kernel.postinst: 243: /var/lib/dpkg/info/raspberrypi-kernel.postinst: rm: Input/output error
Bus error
/var/lib/dpkg/info/raspberrypi-kernel.postinst: 245: /var/lib/dpkg/info/raspberrypi-kernel.postinst: sync: Input/output error
/var/lib/dpkg/info/raspberrypi-kernel.postinst: 248: /var/lib/dpkg/info/raspberrypi-kernel.postinst: rm: Input/output error
Bus error
/var/lib/dpkg/info/raspberrypi-kernel.postinst: 250: /var/lib/dpkg/info/raspberrypi-kernel.postinst: sync: Input/output error
dpkg: unrecoverable fatal error, aborting:
 unable to flush updated status of 'raspberrypi-kernel': Read-only file system
E: Sub-process /usr/bin/dpkg returned an error code (2)
W: Operation was interrupted before it could finish
W: Problem unlinking the file /var/cache/apt/pkgcache.bin - pkgDPkgPM::Go (30: Read-only file system)
root@raspberrypi:/home/pi# apt-get dist-upgrade
bash: /usr/bin/apt-get: Input/output error
root@raspberrypi:/home/pi# apt-get update && apt-get upgrade
bash: /usr/bin/apt-get: Input/output error
root@raspberrypi:/home/pi# cat
bash: cat: command not found
root@raspberrypi:/home/pi# apt-get install cat
bash: /usr/bin/apt-get: Input/output error
root@raspberrypi:/home/pi#