В терминале, когда я выхожу cp команда, это указывает:

The program 'cp' is currently not installed. You can install it by typing:
apt-get install coreutils

Но когда я пытаюсь установить его, я упомянул ниже ошибки:

depmod: FATAL: could not load /boot/System.map-3.19.0-25-generic: No such file or directory
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 3.19.0-25-generic /boot/vmlinuz-3.19.0-25-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.19.0-25-generic /boot/vmlinuz-3.19.0-25-generic
update-initramfs: Generating /boot/initrd.img-3.19.0-25-generic
grep: /boot/config-3.19.0-25-generic: No such file or directory
WARNING: missing /lib/modules/3.19.0-25-generic
Device driver support needs thus be built-in linux image!
depmod: ERROR: could not open directory /lib/modules/3.19.0-25-generic: No such file or directory
depmod: FATAL: could not search modules: No such file or directory
/usr/sbin/mkinitramfs: 245: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 255: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 255: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 255: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 255: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 255: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 255: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 255: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 255: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 255: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 255: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 255: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 255: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 255: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 269: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 149: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 149: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 173: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 173: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 173: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 173: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 173: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 173: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 173: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 173: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 173: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 149: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 173: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 173: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 149: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 173: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 173: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 294: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 149: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 173: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 173: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 173: /usr/sbin/mkinitramfs: cp: not found
/usr/sbin/mkinitramfs: 173: /usr/sbin/mkinitramfs: cp: not found
/usr/share/initramfs-tools/hooks/fixrtc: 149: /usr/share/initramfs-tools/hooks/fixrtc: cp: not found
E: /usr/share/initramfs-tools/hooks/fixrtc failed with return 127.
update-initramfs: failed for /boot/initrd.img-3.19.0-25-generic with 127.
run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 127
dpkg: error processing package linux-image-extra-3.19.0-25-generic (--remove):
 subprocess installed post-removal script returned error exit status 1
Errors were encountered while processing:
 linux-image-extra-3.19.0-25-generic
E: Sub-process /usr/bin/dpkg returned an error code (1)

Вывод echo $PATH:

/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin