getting You don't have enough free space in /var/cache/apt/archives/.

[kustomjs]

Hello Guys
I am currently getting this error code: You don't have enough free space in /var/cache/apt/archives/. on my ubuntu server 16.04 lts and I have tried sudo apt-get autoremove and sudo autoremove still get that error code.

so I did this df -ha and got this:

Filesystem                 Size  Used Avail Use% Mounted on
sysfs                         0     0     0    - /sys
proc                          0     0     0    - /proc
udev                       2.0G     0  2.0G   0% /dev
devpts                        0     0     0    - /dev/pts
tmpfs                      396M   11M  385M   3% /run
/dev/mapper/mail--vg-root  455G  454G     0 100% /
securityfs                    0     0     0    - /sys/kernel/security
tmpfs                      2.0G     0  2.0G   0% /dev/shm
tmpfs                      5.0M     0  5.0M   0% /run/lock
tmpfs                      2.0G     0  2.0G   0% /sys/fs/cgroup
cgroup                        0     0     0    - /sys/fs/cgroup/systemd
pstore                        0     0     0    - /sys/fs/pstore
cgroup                        0     0     0    - /sys/fs/cgroup/devices
cgroup                        0     0     0    - /sys/fs/cgroup/cpu,cpuacct
cgroup                        0     0     0    - /sys/fs/cgroup/net_cls,net_prio
cgroup                        0     0     0    - /sys/fs/cgroup/cpuset
cgroup                        0     0     0    - /sys/fs/cgroup/memory
cgroup                        0     0     0    - /sys/fs/cgroup/pids
cgroup                        0     0     0    - /sys/fs/cgroup/blkio
cgroup                        0     0     0    - /sys/fs/cgroup/hugetlb
cgroup                        0     0     0    - /sys/fs/cgroup/perf_event
cgroup                        0     0     0    - /sys/fs/cgroup/freezer
systemd-1                     -     -     -    - /proc/sys/fs/binfmt_misc
mqueue                        0     0     0    - /dev/mqueue
hugetlbfs                     0     0     0    - /dev/hugepages
debugfs                       0     0     0    - /sys/kernel/debug
fusectl                       0     0     0    - /sys/fs/fuse/connections
/dev/vda1                  472M  467M     0 100% /boot
lxcfs                         0     0     0    - /var/lib/lxcfs
binfmt_misc                   0     0     0    - /proc/sys/fs/binfmt_misc
tracefs                       -     -     -    - /sys/kernel/debug/tracing
tmpfs                      396M     0  396M   0% /run/user/1000

what can I do get it back to running mail server?

[darkod]

Both your root and /boot are 100% full. You need to free space. For /boot you can uninstall old kernels using dpkg. For root you need to delete some data to free up space.

[deadflowr]

sudo apt-get clean

clears out the archive, entirely.

Bonus is

sudo apt-get autoclean

this cleans out only the older and obsolete archives.
Keeping the most recent
Example would be it'll clear out older firefox archived packages, but keep the currently installed archive package.
(edit: though if server Firefox would be irrelevant.....)

[kustomjs]

whats the best way on removing old kernels?

[darkod]

1. Use uname -r to check loaded kernel. DO NOT remove that one.
2. Use dpkg --list | grep linux-image to list all kernels. The ones with ii in front are currently installed.
3. To remove use sudo dpkg --purge linux-image-XXXX-generic. Leave the two newest kernels and the one currently loaded.

[kustomjs]

this is what images I have loaded:

tim@mail:~$ dpkg --list | grep linux-image
pi  linux-image-4.4.0-62-generic       4.4.0-62.83                                amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP
ii  linux-image-4.4.0-75-generic       4.4.0-75.96                                amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP
ii  linux-image-4.4.0-77-generic       4.4.0-77.98                                amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP
ii  linux-image-4.4.0-78-generic       4.4.0-78.99                                amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP
ii  linux-image-4.4.0-79-generic       4.4.0-79.100                               amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP
ii  linux-image-4.4.0-81-generic       4.4.0-81.104                               amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP
ii  linux-image-4.4.0-83-generic       4.4.0-83.106                               amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP
ii  linux-image-4.4.0-87-generic       4.4.0-87.110                               amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP
pi  linux-image-4.4.0-89-generic       4.4.0-89.112                               amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP
iF  linux-image-4.4.0-91-generic       4.4.0-91.114                               amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP
iF  linux-image-4.4.0-92-generic       4.4.0-92.115                               amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP
ii  linux-image-extra-4.4.0-62-generic 4.4.0-62.83                                amd64        Linux kernel extra modules for version 4.4.0 on 64 bit x86 SMP
ii  linux-image-extra-4.4.0-75-generic 4.4.0-75.96                                amd64        Linux kernel extra modules for version 4.4.0 on 64 bit x86 SMP
ii  linux-image-extra-4.4.0-77-generic 4.4.0-77.98                                amd64        Linux kernel extra modules for version 4.4.0 on 64 bit x86 SMP
ii  linux-image-extra-4.4.0-78-generic 4.4.0-78.99                                amd64        Linux kernel extra modules for version 4.4.0 on 64 bit x86 SMP
ii  linux-image-extra-4.4.0-79-generic 4.4.0-79.100                               amd64        Linux kernel extra modules for version 4.4.0 on 64 bit x86 SMP
ii  linux-image-extra-4.4.0-81-generic 4.4.0-81.104                               amd64        Linux kernel extra modules for version 4.4.0 on 64 bit x86 SMP
ii  linux-image-extra-4.4.0-83-generic 4.4.0-83.106                               amd64        Linux kernel extra modules for version 4.4.0 on 64 bit x86 SMP
ii  linux-image-extra-4.4.0-87-generic 4.4.0-87.110                               amd64        Linux kernel extra modules for version 4.4.0 on 64 bit x86 SMP
iF  linux-image-extra-4.4.0-89-generic 4.4.0-89.112                               amd64        Linux kernel extra modules for version 4.4.0 on 64 bit x86 SMP
iU  linux-image-extra-4.4.0-91-generic 4.4.0-91.114                               amd64        Linux kernel extra modules for version 4.4.0 on 64 bit x86 SMP
iU  linux-image-extra-4.4.0-92-generic 4.4.0-92.115                               amd64        Linux kernel extra modules for version 4.4.0 on 64 bit x86 SMP
iU  linux-image-extra-4.4.0-93-generic 4.4.0-93.116                               amd64        Linux kernel extra modules for version 4.4.0 on 64 bit x86 SMP
iU  linux-image-generic                4.4.0.93.98                                amd64        Generic Linux kernel image

when I try to remove one of them I get this error:

xx@mail:~$ sudo dpkg --purge linux-image-4.4.0-89-generic
[sudo] password for xx:
dpkg: dependency problems prevent removal of linux-image-4.4.0-89-generic:
linux-image-extra-4.4.0-89-generic depends on linux-image-4.4.0-89-generic.

dpkg: error processing package linux-image-4.4.0-89-generic (--purge):
dependency problems - not removing
Errors were encountered while processing:
linux-image-4.4.0-89-generic
xx@mail:~$

[darkod]

But that one says 'pi' in the first column, not 'ii'. Try ones with 'ii'.

Also dependencies can be broken if apt-get ran out of space. In that case the alternative is removing kernel files manually with rm from /boot. Be careful though, and as said never remove the current running kernel or the two newest ones. The initrd and the linux files are the biggest ones in /boot. You can ignore the rest for now... Just remove the biggest ones for each -XX- kernel versio nthat you want to remove. Once you have about 200MB free in /boot, apt-get will start working and you can continue cleaning up with apt-get.

Don't forget, this is only related to /boot. You also have to clean space on root partition, delete some of the data there.

[kustomjs]

Alright when I did that it crash the VPS server and right now I am in recovery and I am still lost how a 500gb mail server can use all of that 500gb that quick I only got 15 customers on this mail server with only 100meg mail boxes and I am using iredmail with mysql.

[darkod]

Recovery? If you entered with 'drop to root shell' you need to remount / as RW, you know that?

Plus, I didn't really understand which part crashed the server, deleting kernels with rm?

Post the content of your /boot:

df -h
uname -r
ls /boot/

Then we can help with more detailed commands if you need it...

[kustomjs]

here is a image since I had to do kvm console due to system crash
.ub1.jpg

Yes I crashed the system after removing the older kernels and I left the 2 newest ones in there.