Dear Julio and Thomas,
Yes you both right, here are the messages:
root@phnhnpdczty:~# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/phn--hn--dc--v--zty--4--vg-root 98G 5.9G 87G 7% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
udev 4.9G 4.0K 4.9G 1% /dev
tmpfs 1001M 4.1M 997M 1% /run
none 50M 0 50M 0% /run/lock
none 4.9G 4.0K 4.9G 1% /run/shm
none 100M 4.0K 100M 1% /run/user
/dev/vda1 236M 230M 0 100% /boot
/dev/vdb1 3.9T 3.2T 548G 86% /data
root@phnhnpdczty:~# uname -a
Linux phnhnpdczty 3.16.0-51-generic #69~14.04.1-Ubuntu SMP Wed Oct 7 15:32:41 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
root@phnhnpdczty:~# dpkg -l linux-image* |grep ii
ii linux-image-3.16.0-30-generic 3.16.0-30.40~14.04.1 amd64 Linux kernel image for version 3.16.0 on 64 bit x86 SMP
ii linux-image-3.16.0-45-generic 3.16.0-45.60~14.04.1 amd64 Linux kernel image for version 3.16.0 on 64 bit x86 SMP
ii linux-image-3.16.0-46-generic 3.16.0-46.62~14.04.1 amd64 Linux kernel image for version 3.16.0 on 64 bit x86 SMP
ii linux-image-3.16.0-48-generic 3.16.0-48.64~14.04.1 amd64 Linux kernel image for version 3.16.0 on 64 bit x86 SMP
ii linux-image-3.16.0-49-generic 3.16.0-49.65~14.04.1 amd64 Linux kernel image for version 3.16.0 on 64 bit x86 SMP
ii linux-image-3.16.0-50-generic 3.16.0-50.67~14.04.1 amd64 Linux kernel image for version 3.16.0 on 64 bit x86 SMP
ii linux-image-3.16.0-51-generic 3.16.0-51.69~14.04.1 amd64 Linux kernel image for version 3.16.0 on 64 bit x86 SMP
ii linux-image-extra-3.16.0-30-generic 3.16.0-30.40~14.04.1 amd64 Linux kernel extra modules for version 3.16.0 on 64 bit x86 SMP
ii linux-image-extra-3.16.0-45-generic 3.16.0-45.60~14.04.1 amd64 Linux kernel extra modules for version 3.16.0 on 64 bit x86 SMP
ii linux-image-extra-3.16.0-46-generic 3.16.0-46.62~14.04.1 amd64 Linux kernel extra modules for version 3.16.0 on 64 bit x86 SMP
ii linux-image-extra-3.16.0-48-generic 3.16.0-48.64~14.04.1 amd64 Linux kernel extra modules for version 3.16.0 on 64 bit x86 SMP
ii linux-image-extra-3.16.0-49-generic 3.16.0-49.65~14.04.1 amd64 Linux kernel extra modules for version 3.16.0 on 64 bit x86 SMP
ii linux-image-extra-3.16.0-50-generic 3.16.0-50.67~14.04.1 amd64 Linux kernel extra modules for version 3.16.0 on 64 bit x86 SMP
root@phnhnpdczty:~# ls -lah /boot
total 221M
drwxr-xr-x 4 root root 3.0K Nov 14 14:08 .
drwxrwxrwx 24 root root 4.0K Nov 13 14:39 ..
-rw-r--r-- 1 root root 1.2M Jan 16 2015 abi-3.16.0-30-generic
-rw-r--r-- 1 root root 1.2M Jul 25 06:24 abi-3.16.0-45-generic
-rw-r--r-- 1 root root 1.2M Aug 12 01:17 abi-3.16.0-46-generic
-rw-r--r-- 1 root root 1.2M Aug 21 07:35 abi-3.16.0-48-generic
-rw-r--r-- 1 root root 1.2M Sep 9 18:13 abi-3.16.0-49-generic
-rw-r--r-- 1 root root 1.2M Oct 3 08:04 abi-3.16.0-50-generic
-rw-r--r-- 1 root root 1.2M Oct 8 03:18 abi-3.16.0-51-generic
-rw-r--r-- 1 root root 1.2M Oct 24 03:04 abi-3.16.0-52-generic
-rw-r--r-- 1 root root 168K Jan 16 2015 config-3.16.0-30-generic
-rw-r--r-- 1 root root 168K Jul 25 06:24 config-3.16.0-45-generic
-rw-r--r-- 1 root root 168K Aug 12 01:17 config-3.16.0-46-generic
-rw-r--r-- 1 root root 168K Aug 21 07:35 config-3.16.0-48-generic
-rw-r--r-- 1 root root 168K Sep 9 18:13 config-3.16.0-49-generic
-rw-r--r-- 1 root root 168K Oct 3 08:04 config-3.16.0-50-generic
-rw-r--r-- 1 root root 168K Oct 8 03:18 config-3.16.0-51-generic
-rw-r--r-- 1 root root 168K Oct 24 03:04 config-3.16.0-52-generic
drwxr-xr-x 5 root root 1.0K Oct 20 05:09 grub
-rw-r--r-- 1 root root 20M Aug 4 05:10 initrd.img-3.16.0-30-generic
-rw-r--r-- 1 root root 20M Aug 4 05:13 initrd.img-3.16.0-45-generic
-rw-r--r-- 1 root root 20M Aug 18 05:06 initrd.img-3.16.0-46-generic
-rw-r--r-- 1 root root 20M Sep 4 05:09 initrd.img-3.16.0-48-generic
-rw-r--r-- 1 root root 20M Sep 24 05:06 initrd.img-3.16.0-49-generic
-rw-r--r-- 1 root root 20M Oct 15 05:06 initrd.img-3.16.0-50-generic
-rw-r--r-- 1 root root 20M Oct 20 05:09 initrd.img-3.16.0-51-generic
drwx------ 2 root root 12K Jul 5 21:44 lost+found
-rw------- 1 root root 3.4M Jan 16 2015 System.map-3.16.0-30-generic
-rw------- 1 root root 3.4M Jul 25 06:24 System.map-3.16.0-45-generic
-rw------- 1 root root 3.4M Aug 12 01:17 System.map-3.16.0-46-generic
-rw------- 1 root root 3.4M Aug 21 07:35 System.map-3.16.0-48-generic
-rw------- 1 root root 3.4M Sep 9 18:13 System.map-3.16.0-49-generic
-rw------- 1 root root 3.4M Oct 3 08:04 System.map-3.16.0-50-generic
-rw------- 1 root root 3.4M Oct 8 03:18 System.map-3.16.0-51-generic
-rw------- 1 root root 3.4M Oct 24 03:04 System.map-3.16.0-52-generic
-rw------- 1 root root 6.1M Jan 16 2015 vmlinuz-3.16.0-30-generic
-rw------- 1 root root 6.1M Jul 25 06:24 vmlinuz-3.16.0-45-generic
-rw------- 1 root root 6.1M Aug 12 01:17 vmlinuz-3.16.0-46-generic
-rw------- 1 root root 6.1M Aug 21 07:35 vmlinuz-3.16.0-48-generic
-rw------- 1 root root 6.1M Sep 9 18:13 vmlinuz-3.16.0-49-generic
-rw------- 1 root root 6.1M Oct 3 08:04 vmlinuz-3.16.0-50-generic
-rw------- 1 root root 6.1M Oct 8 03:18 vmlinuz-3.16.0-51-generic
-rw------- 1 root root 6.1M Oct 24 03:04 vmlinuz-3.16.0-52-generic
root@phnhnpdczty:~#
How to solve when it becomes full, how to extend?. I am still new Linux but I am eager to be aware about this, especially Linux system infrastructure.
Thank you!
Thy Ly