GNU/Linux Desktop Survival Guide by Graham Williams
Desktop Survival Project Home Preface Advocacy History Distributions Installing GNU/Linux Basic Survival Wajig Applications AI, Machine Learning, Data Science Android - GNU/Linux Devices Audio Backup Booting CD Chinese ChRoot Clock Command Line Databases DIA Directories Disks EcoSysL Emacs Email Evolution Files File Systems Firewalls Floppy Disks FreedomBox Glade GNOME Graphics, Images, Photos Hardware Initialisations on Booting Installation Examples Internet IOT Java KDE Kernels Keyboard Konqueror KVM Switch LATEX Log System Login Magellan MATE Mathematics Memory Modems Mounting Devices MS/Windows Music MySQL Nautilus Networks Nextcloud Network File System NFS NT File System Oracle Packages Partitions Passwords PDF Power Management PPP Presentations Printing Python R Remote Desktops Rsync Samba Scanning Science Screens Security Spreadsheet SSH Swap Teradata Data Warehouse Themes TV Unity USB Version Control Video Virtualization Voice over IP WebCam WordPress Web Sites Word Processing and Printing X XML Troubleshooting Index

CLICK HERE TO VISIT THE UPDATED SURVIVAL GUIDE

Doh Digital Ocean Host

20200101 A Ubuntu server can be set up as a virtual machine on a cloud service like Digital Ocean. Ubuntu 16.04 was originally installed an run as a nextcloud server.

Upgrade Doh LTS 16.04 to 18.04

20191026 The php packages on doh (36.5) required upgrading due to recent security issues (as advised by nextcloud). Upgraded from Ubuntu 16.04 to 18.04 (both LTS—long term supported). The server is remote so connection is via ssh which presents challenges if anything goes wrong. The server could always be rebuilt if failed but ensure it is backed up.

$ sudo do-release-upgrade

During the upgrade an update to the apache configuration file was requested and proceeded with (y):

Configuration file '/etc/apache2/apache2.conf'
 ==> Modified (by you or by a script) since installation.
 ==> Package distributor has shipped an updated version.
   What would you like to do about it ?  Your options are:
    Y or I  : install the package maintainer's version
    N or O  : keep your currently-installed version
      D     : show the differences between the versions
      Z     : start a shell to examine the situation
 The default action is to keep your current version.
*** apache2.conf (Y/I/N/O/D/Z) [default=N] ? d
--- /etc/apache2/apache2.conf   2017-03-11 13:34:54.863634000 +0000
+++ /etc/apache2/apache2.conf.dpkg-new  2019-09-16 12:58:48.000000000 +0000
@@ -71,7 +71,13 @@
-Mutex file:${APACHE_LOCK_DIR} default
+#Mutex file:${APACHE_LOCK_DIR} default
+
+#
+# The directory where shm and other runtime files will be stored.
+#
+
+DefaultRuntimeDir ${APACHE_RUN_DIR}
@@ -218,6 +224,4 @@
-ServerName nextcloud.doh.com
-

Also sshd and chose to go with the essentially new configuration file:

--- /etc/ssh/sshd_config root.root 0644 2017-03-11 13:21:34                                                               
+++ /tmp/fileh01MNm root.root 0644 2019-10-25 23:55:13                                                                    
1,2c1
< # Package generated configuration file
< # See the sshd_config(5) manpage for details
---
> #	$OpenBSD: sshd_config,v 1.101 2017/03/14 07:19:07 djm Exp $
4,7c3,14
< # What ports, IPs and protocols we listen for
< Port 22
[...]

Then reboot, and noted through browser connection to nextcloud php was no longer enabled for apache2 (the php file was being displayed rather than being run). It needed to be enabled:

$ sudo a2enmod php7.2
$ wajig restart apache2

Nextcloud itself was then upgraded from 15 to 16 through the browser based upgrade button.