I stupidly decided to update from 14.04LTS to 14.10 and then 15.04.

Since doing that, my website has gone down and file system has become read only. I have no idea what has gone wrong, as the updates completed successfully.

This is what I have found so far:

root@lew:/# service apache2 status apache2.service - LSB: Apache2 web server Loaded: loaded (/etc/init.d/apache2) Active: failed (Result: exit-code) since Sun 2015-07-12 08:36:18 EDT; 31min ago Docs: man:systemd-sysv-generator(8) Process: 901 ExecStart=/etc/init.d/apache2 start (code=exited, status=1/FAILURE) Jul 12 08:36:18 lew.im systemd[1]: Starting LSB: Apache2 web server... Jul 12 08:36:18 lew.im apache2[901]: * Starting web server apache2 Jul 12 08:36:18 lew.im apache2[901]: mktemp: failed to create file via template ‘/tmp/tmp.XXXXXXXXXX’: Read-only file system Jul 12 08:36:18 lew.im apache2[901]: /etc/init.d/apache2: 91: /etc/init.d/apache2: cannot create : Directory nonexistent Jul 12 08:36:18 lew.im apache2[901]: * Jul 12 08:36:18 lew.im apache2[901]: * The apache2 configtest failed. Jul 12 08:36:18 lew.im systemd[1]: apache2.service: control process exited, code=exited status=1 Jul 12 08:36:18 lew.im systemd[1]: Failed to start LSB: Apache2 web server. Jul 12 08:36:18 lew.im systemd[1]: Unit apache2.service entered failed state. Jul 12 08:36:18 lew.im systemd[1]: apache2.service failed.

then fdisk -l:

root@lew:/# fdisk -l Disk /dev/vda: 20 GiB, 21476933632 bytes, 41947136 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: 06F7B3C9-8E13-42CD-AD52-7A02301B6F16 Device Start End Sectors Size Type /dev/vda1 2048 41945087 41943040 20G Linux filesystem

and fsck /

root@lew:/# sudo fsck / fsck from util-linux 2.25.2 fsck.ext4: Unable to resolve 'UUID=815063a9-c956-44a6-ab11-05e1d0bb3a58'

I am a beginner at all of this, but from what I have read, I need to fix something in fstab? Why has updating broken this, what could have gone wrong?

I SSH in to this server, as it is hosted in DigitalOcean.

Edit:

Blkid

root@lew:~# blkid /dev/vda1: LABEL="DOROOT" UUID="18254707-08e8-494e-b456-938592928a5e" TYPE="ext4" PTTYPE="dos" PARTLABEL="primary" PARTUUID="8c484e81-f919-4803-acc7-1447fdd81b45"

Mount

root@lew:~# mount /dev/vda1 on / type ext4 (rw,errors=remount-ro) proc on /proc type proc (rw,nodev,noexec,nosuid) sysfs on /sys type sysfs (rw,nodev,noexec,nosuid) none on /sys/fs/cgroup type tmpfs (rw,uid=0,gid=0,mode=0755,size=1024) none on /sys/fs/fuse/connections type fusectl (rw) none on /sys/kernel/debug type debugfs (rw) none on /sys/kernel/security type securityfs (rw) udev on /dev type devtmpfs (rw,mode=0755) devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620) tmpfs on /run type tmpfs (rw,noexec,nosuid,size=10%,mode=0755) none on /run/lock type tmpfs (rw,nodev,noexec,nosuid,size=5242880) none on /run/shm type tmpfs (rw,nosuid,nodev) none on /run/user type tmpfs (rw,nodev,noexec,nosuid,size=104857600,mode=0755) none on /sys/fs/pstore type pstore (rw) systemd on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,noexec,nodev,none,name=systemd)

Fstab