I am not so into Linux and I have the following problem related to the fact that my /boot partition seems to be full and it seems to cause a problem trying to install a program.
I am using Ubuntu Ubuntu 16.04.1 LTS
I try to explain in detail my doubts because I am not so into system engineering (I am a software developer).
1) Performing the lsblk statment lists information about all available or the specified block devices.
Empirically I think that it should show the list of all the partitions/mounted disks or something like this. What exactly means with the terms block devices?
So if I perform this statment on my Ubuntu system I obtain:
root@MyServer-VPS:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
fd0 2:0 1 4K 0 disk
sda 8:0 0 20G 0 disk
├─sda1 8:1 0 476M 0 part /boot
├─sda2 8:2 0 1K 0 part
├─sda3 8:3 0 10G 0 part
│ └─vg-lv_root 252:0 0 18.6G 0 lvm /
└─sda5 8:5 0 9.5G 0 part
├─vg-lv_root 252:0 0 18.6G 0 lvm /
└─vg-lv_swap 252:1 0 952M 0 lvm [SWAP]
sr0 11:0 1 1024M 0 rom
So what is the difference between disk, part (it should be a partition of the parent disk), lvm and rom?
A specific partition is boot, this one:
sda1 8:1 0 476M 0 part /boot
that is a sda disk partition.
From what I know it should contains the Linux Kernel downloaded versions. Is it?
Ok, the mount point is /boot so I think that it is the /boot directory into my system (is it?), this is the content:
root@MyServer-VPS:/boot# ls
abi-4.4.0-21-generic config-4.4.0-21-generic grub System.map-4.4.0-21-generic vmlinuz-4.4.0-21-generic
abi-4.4.0-31-generic config-4.4.0-31-generic initrd.img-4.4.0-21-generic System.map-4.4.0-31-generic vmlinuz-4.4.0-31-generic
abi-4.4.0-34-generic config-4.4.0-34-generic initrd.img-4.4.0-31-generic System.map-4.4.0-34-generic vmlinuz-4.4.0-34-generic
abi-4.4.0-38-generic config-4.4.0-38-generic initrd.img-4.4.0-34-generic System.map-4.4.0-38-generic vmlinuz-4.4.0-38-generic
abi-4.4.0-42-generic config-4.4.0-42-generic initrd.img-4.4.0-38-generic System.map-4.4.0-42-generic vmlinuz-4.4.0-42-generic
abi-4.4.0-45-generic config-4.4.0-45-generic initrd.img-4.4.0-42-generic System.map-4.4.0-45-generic vmlinuz-4.4.0-45-generic
abi-4.4.0-47-generic config-4.4.0-47-generic initrd.img-4.4.0-45-generic System.map-4.4.0-47-generic vmlinuz-4.4.0-47-generic
abi-4.4.0-51-generic config-4.4.0-51-generic initrd.img-4.4.0-47-generic System.map-4.4.0-51-generic vmlinuz-4.4.0-51-generic
abi-4.4.0-53-generic config-4.4.0-53-generic initrd.img-4.4.0-51-generic System.map-4.4.0-53-generic vmlinuz-4.4.0-53-generic
abi-4.4.0-57-generic config-4.4.0-57-generic initrd.img-4.4.0-53-generic System.map-4.4.0-57-generic vmlinuz-4.4.0-57-generic
abi-4.4.0-59-generic config-4.4.0-59-generic lost+found System.map-4.4.0-59-generic vmlinuz-4.4.0-59-generic
So what these contents exactly represents? Are the differents Linux kernel versions downloaded on this system?
What are the difference between the abi-, config-, initrd.img-, System.map- and vmlinuz-4 files?
How can I detect the used kernel version?
2) Performing the df -h statment I obtain this output:
root@MyServer-VPS:~# df -h
Filesystem Size Used Avail Use% Mounted on
udev 477M 0 477M 0% /dev
tmpfs 100M 16M 84M 16% /run
/dev/mapper/vg-lv_root 19G 12G 6.3G 64% /
tmpfs 497M 0 497M 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 497M 0 497M 0% /sys/fs/cgroup
/dev/sda1 461M 458M 0 100% /boot
tmpfs 100M 0 100M 0% /run/user/0
In particular I have that:
/dev/sda1 461M 458M 0 100% /boot
So it means that my /boot partition is completly full?
My problem is: can I saftly deetect delete all the old kernel version (the not used one) to free up space in the /boot ?
How can I do it?
