i cant update to the new version
this is the error message --
The upgrade needs a total of 44.1 M free space n disk '/boot' . Empty your trash and remove temporary packages of former installations using 'sudo apt-get clean'
edu@Eduardo:~$ mount; df -h; dpkg -l | grep linux-
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
udev on /dev type devtmpfs (rw,nosuid,relatime,size=4028564k,nr_inodes=1007141,mode=755)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,noexec,relatime,size=810288k,mode=755)
/dev/mapper/ubuntu--vg-root on / type ext4 (rw,relatime,errors=remount-ro,data=ordered)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
tmpfs on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k)
tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,mode=755)
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer)
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio)
cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event)
cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids)
cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,net_cls,net_prio)
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpu,cpuacct)
cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb)
cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices)
cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory)
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset)
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=23,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=214)
mqueue on /dev/mqueue type mqueue (rw,relatime)
debugfs on /sys/kernel/debug type debugfs (rw,relatime)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime)
fusectl on /sys/fs/fuse/connections type fusectl (rw,relatime)
/dev/sda1 on /boot type ext2 (rw,relatime,block_validity,barrier,user_xattr,acl,stripe=4)
tmpfs on /run/user/1000 type tmpfs (rw,nosuid,nodev,relatime,size=810288k,mode=700,uid=1000,gid=1000)
gvfsd-fuse on /run/user/1000/gvfs type fuse.gvfsd-fuse (rw,nosuid,nodev,relatime,user_id=1000,group_id=1000)
Filesystem Size Used Avail Use% Mounted on
udev 3.9G 0 3.9G 0% /dev
tmpfs 792M 9.5M 782M 2% /run
/dev/mapper/ubuntu--vg-root 451G 17G 411G 4% /
tmpfs 3.9G 57M 3.9G 2% /dev/shm
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/sda1 472M 450M 0 100% /boot
tmpfs 792M 48K 792M 1% /run/user/1000
ii linux-base 4.0ubuntu1 all Linux image base package
iF linux-firmware 1.157.14 all Firmware for Linux kernel drivers
iU linux-generic-hwe-16.04 4.10.0.42.44 amd64 Complete Generic Linux kernel and headers
ii linux-headers-4.10.0-28 4.10.0-28.32~16.04.2 all Header files related to Linux kernel version 4.10.0
ii linux-headers-4.10.0-28-generic 4.10.0-28.32~16.04.2 amd64 Linux kernel headers for version 4.10.0 on 64 bit x86 SMP
ii linux-headers-4.10.0-30 4.10.0-30.34~16.04.1 all Header files related to Linux kernel version 4.10.0
ii linux-headers-4.10.0-30-generic 4.10.0-30.34~16.04.1 amd64 Linux kernel headers for version 4.10.0 on 64 bit x86 SMP
ii linux-headers-4.10.0-32 4.10.0-32.36~16.04.1 all Header files related to Linux kernel version 4.10.0
ii linux-headers-4.10.0-32-generic 4.10.0-32.36~16.04.1 amd64 Linux kernel headers for version 4.10.0 on 64 bit x86 SMP
ii linux-headers-4.10.0-33 4.10.0-33.37~16.04.1 all Header files related to Linux kernel version 4.10.0
ii linux-headers-4.10.0-33-generic 4.10.0-33.37~16.04.1 amd64 Linux kernel headers for version 4.10.0 on 64 bit x86 SMP
ii linux-headers-4.10.0-35 4.10.0-35.39~16.04.1 all Header files related to Linux kernel version 4.10.0
ii linux-headers-4.10.0-35-generic 4.10.0-35.39~16.04.1 amd64 Linux kernel headers for version 4.10.0 on 64 bit x86 SMP
ii linux-headers-4.10.0-37 4.10.0-37.41~16.04.1 all Header files related to Linux kernel version 4.10.0
ii linux-headers-4.10.0-37-generic 4.10.0-37.41~16.04.1 amd64 Linux kernel headers for version 4.10.0 on 64 bit x86 SMP
ii linux-headers-4.10.0-38 4.10.0-38.42~16.04.1 all Header files related to Linux kernel version 4.10.0
ii linux-headers-4.10.0-38-generic 4.10.0-38.42~16.04.1 amd64 Linux kernel headers for version 4.10.0 on 64 bit x86 SMP
ii linux-headers-4.10.0-40 4.10.0-40.44~16.04.1 all Header files related to Linux kernel version 4.10.0
ii linux-headers-4.10.0-40-generic 4.10.0-40.44~16.04.1 amd64 Linux kernel headers for version 4.10.0 on 64 bit x86 SMP
ii linux-headers-4.10.0-42 4.10.0-42.46~16.04.1 all Header files related to Linux kernel version 4.10.0
ii linux-headers-4.10.0-42-generic 4.10.0-42.46~16.04.1 amd64 Linux kernel headers for version 4.10.0 on 64 bit x86 SMP
ii linux-headers-generic-hwe-16.04 4.10.0.42.44 amd64 Generic Linux kernel headers
ii linux-image-4.10.0-28-generic 4.10.0-28.32~16.04.2 amd64 Linux kernel image for version 4.10.0 on 64 bit x86 SMP
ii linux-image-4.10.0-30-generic 4.10.0-30.34~16.04.1 amd64 Linux kernel image for version 4.10.0 on 64 bit x86 SMP
ii linux-image-4.10.0-32-generic 4.10.0-32.36~16.04.1 amd64 Linux kernel image for version 4.10.0 on 64 bit x86 SMP
ii linux-image-4.10.0-33-generic 4.10.0-33.37~16.04.1 amd64 Linux kernel image for version 4.10.0 on 64 bit x86 SMP
ii linux-image-4.10.0-35-generic 4.10.0-35.39~16.04.1 amd64 Linux kernel image for version 4.10.0 on 64 bit x86 SMP
ii linux-image-4.10.0-37-generic 4.10.0-37.41~16.04.1 amd64 Linux kernel image for version 4.10.0 on 64 bit x86 SMP
ii linux-image-4.10.0-38-generic 4.10.0-38.42~16.04.1 amd64 Linux kernel image for version 4.10.0 on 64 bit x86 SMP
ii linux-image-4.10.0-40-generic 4.10.0-40.44~16.04.1 amd64 Linux kernel image for version 4.10.0 on 64 bit x86 SMP
iF linux-image-4.10.0-42-generic 4.10.0-42.46~16.04.1 amd64 Linux kernel image for version 4.10.0 on 64 bit x86 SMP
ii linux-image-extra-4.10.0-28-generic 4.10.0-28.32~16.04.2 amd64 Linux kernel extra modules for version 4.10.0 on 64 bit x86 SMP
ii linux-image-extra-4.10.0-30-generic 4.10.0-30.34~16.04.1 amd64 Linux kernel extra modules for version 4.10.0 on 64 bit x86 SMP
ii linux-image-extra-4.10.0-32-generic 4.10.0-32.36~16.04.1 amd64 Linux kernel extra modules for version 4.10.0 on 64 bit x86 SMP
ii linux-image-extra-4.10.0-33-generic 4.10.0-33.37~16.04.1 amd64 Linux kernel extra modules for version 4.10.0 on 64 bit x86 SMP
ii linux-image-extra-4.10.0-35-generic 4.10.0-35.39~16.04.1 amd64 Linux kernel extra modules for version 4.10.0 on 64 bit x86 SMP
ii linux-image-extra-4.10.0-37-generic 4.10.0-37.41~16.04.1 amd64 Linux kernel extra modules for version 4.10.0 on 64 bit x86 SMP
ii linux-image-extra-4.10.0-38-generic 4.10.0-38.42~16.04.1 amd64 Linux kernel extra modules for version 4.10.0 on 64 bit x86 SMP
iF linux-image-extra-4.10.0-40-generic 4.10.0-40.44~16.04.1 amd64 Linux kernel extra modules for version 4.10.0 on 64 bit x86 SMP
iU linux-image-extra-4.10.0-42-generic 4.10.0-42.46~16.04.1 amd64 Linux kernel extra modules for version 4.10.0 on 64 bit x86 SMP
iU linux-image-generic-hwe-16.04 4.10.0.42.44 amd64 Generic Linux kernel image
ii linux-libc-dev:amd64 4.4.0-104.127 amd64 Linux Kernel Headers for development
ii linux-sound-base 1.0.25+dfsg-0ubuntu5 all base package for ALSA and OSS sound systems
ii syslinux-common 3:6.03+dfsg-11ubuntu1 all collection of bootloaders (common)
ii syslinux-legacy 2:3.63+dfsg-2ubuntu8 amd64 Bootloader for Linux/i386 using MS-DOS floppies