Increase emonSD pre-built SD card to 8GB min

[pb66 (Paul)]

No there isn’t.

Some time ago I was working on a “rpi” script that offered many options from creating a data partition, adding a hdd, switching between a RO OS and standard OS, enabling MQTT, enabling the LAMP etc etc, This was offered to T&G way before the emonPi or the emonPi image was here. I have not pursued this due to the current trend not to ssh in favor of the emoncms config pages.

Here’s my forwarding only emonbase via ssh,

Using username "pi".
Authenticating with public key "pb66" from agent
Linux energyPi 3.18.11+ #781 PREEMPT Tue Apr 21 18:02:18 BST 2015 armv6l
  ___                 ___                        __  __          _ _
 / _ \ _ __  ___ _ _ | __|_ _  ___ _ _ __ _ _  _|  \/  |___ _ _ (_) |_ ___ _ _
| (_) | '_ \/ -_) ' \| _|| ' \/ -_) '_/ _` | || | |\/| / _ \ ' \| |  _/ _ \ '_|
 \___/| .__/\___|_||_|___|_||_\___|_| \__, |\_, |_|  |_\___/_||_|_|\__\___/_|
      |_|                             |___/ |__/                          .org
(type 'emon' for details)
pi@energyPi ~ $ rpi

The 'rpi' command options

General utilities
   -c | --config    Opens an extended 'raspi-config' user menu
   -h | --help      Display this help for 'rpi' command options
   -u | --update    Updates the Raspbian OS & debian packages
   -l | --lock      Lock (read-only enabled filesystem)
   -o | --open      Open (read-only enabled filesystem)
   -s | --status    Report status information

File system utilities
  -er | --enable-ro     Configures filesystem as read-only
  -dr | --disable-ro    Reverse changes to read-only filesystem
  -ro | --read-only     Lock (read-only enabled filesystem)
  -rw | --read-write    Open (read-only enabled filesystem)
  -ad | --add-datapart  Add a data partition
  -mr | --move-rootfs   Configures OS & rootfs on USB drive
  -em | --enable-mqtt   Enable Mosquitto MQTT v3.1.1 server

pi@energyPi ~ $ emonhub

The 'emonhub' command options

emonHub utilities
   -c | --config    Configure emonHub by editing emonhub.conf
   -t | --crontab   Opens emonHub's crontab time scheduler
   -h | --help      Display help for 'emonhub' command options
   -r | --restart   Restart the emonhub service
   -s | --start     Start the emonhub service
   -u | --update    Update emonHub via the git repository
   -v | --version   Display the emonHub version installed
   -x | --exit      Exit emonHub by stopping the emonhub service
   -d | --disable   Disable emonHub from starting automatically
   -e | --enable    Enable emonHub to always start automatically

emonHub logging
  -dl | --display-log   Display last 10 & on-going log messages
  -ol | --open-logfile  Open logfile in nano text editor
  -rl | --reset-logfile Reset the current logfile (deletes log!)
  -vl | --view-logfile  View the entire logfile

pi@energyPi ~ $ emoncms

Note emonCMS has not been fully installed & configured yet
The following commands will be available once emonCMS is installed

The 'emoncms' command options

emonCMS utilities
   -c | --config    Opens emoncms.conf for configuration
   -h | --help      Display this 'emoncms' command options help
   -u | --update    Updates emonCMS via the git repository

emonCMS setup
  -da | --disable-all   Disables the server, database & emonCMS
  -el | --enable-lite   Enables server, database & lite emonCMS
  -ef | --enable-full   Enables server, database & full emonCMS

To install emonCMS use 'emoncms --install' for installer options

pi@energyPi ~ $

Bill suggested the changes to bash.rc for (RW) and (RO) way back, at the time I actually got the prompt to change colour, red for RO and green for RW but I’ve since lost that feature some where along the line.

EDIT - Oh! I forget I made the “emon” option that listed them all, just spotted above.

pi@energyPi ~ $ emon

 The 'OpenEnergyMonitor' Open-source Hardware & Software project

    navigation via the 'rpi', 'emonhub' & 'emoncms' commands


The 'rpi' command options

General utilities
   -c | --config    Opens an extended 'raspi-config' user menu
   -h | --help      Display this help for 'rpi' command options
   -u | --update    Updates the Raspbian OS & debian packages
   -l | --lock      Lock (read-only enabled filesystem)
   -o | --open      Open (read-only enabled filesystem)
   -s | --status    Report status information

File system utilities
  -er | --enable-ro     Configures filesystem as read-only
  -dr | --disable-ro    Reverse changes to read-only filesystem
  -ro | --read-only     Lock (read-only enabled filesystem)
  -rw | --read-write    Open (read-only enabled filesystem)
  -ad | --add-datapart  Add a data partition
  -mr | --move-rootfs   Configures OS & rootfs on USB drive
  -em | --enable-mqtt   Enable Mosquitto MQTT v3.1.1 server


The 'emonhub' command options

emonHub utilities
   -c | --config    Configure emonHub by editing emonhub.conf
   -t | --crontab   Opens emonHub's crontab time scheduler
   -h | --help      Display help for 'emonhub' command options
   -r | --restart   Restart the emonhub service
   -s | --start     Start the emonhub service
   -u | --update    Update emonHub via the git repository
   -v | --version   Display the emonHub version installed
   -x | --exit      Exit emonHub by stopping the emonhub service
   -d | --disable   Disable emonHub from starting automatically
   -e | --enable    Enable emonHub to always start automatically

emonHub logging
  -dl | --display-log   Display last 10 & on-going log messages
  -ol | --open-logfile  Open logfile in nano text editor
  -rl | --reset-logfile Reset the current logfile (deletes log!)
  -vl | --view-logfile  View the entire logfile


Note emonCMS has not been fully installed & configured yet
The following commands will be available once emonCMS is installed

The 'emoncms' command options

emonCMS utilities
   -c | --config    Opens emoncms.conf for configuration
   -h | --help      Display this 'emoncms' command options help
   -u | --update    Updates emonCMS via the git repository

emonCMS setup
  -da | --disable-all   Disables the server, database & emonCMS
  -el | --enable-lite   Enables server, database & lite emonCMS
  -ef | --enable-full   Enables server, database & full emonCMS

To install emonCMS use 'emoncms --install' for installer options

pi@energyPi ~ $

[glyn.hudson]

Wow, never seen this before. Looks very tidy.

Yes, if SSH’ing should be a last resort.

Let’s stick with rpi-rw and rpi-ro, too many scripts depend on these commands to consider changing unless there is a very compelling reason to.

[Bill.Thomson]

@Andy_Taylor

Aliases to control re-mounting
alias rpi-ro=‘sudo mount -o remount,ro / ; sudo mount -o remount,ro /boot’
alias rpi-rw=‘sudo mount -o remount,rw / ; sudo mount -o remount,rw /boot’

Ironically enough, I made the same suggestion about a year ago and got shot down. Go figure.

[pb66 (Paul)]

@pb66

Bill suggested the changes to bash.rc for (RW) and (RO) way back,

Not all of us forgot that Bill…

Also the use of apt-get clean was discussed at length way back when Glyn was struggling to get the image on a 4gb card before going down the slim OS route.

Neither of these points take anything away from Andy, they are both good points to be raised again, it just shows how much unused and at the time perhaps unappreciated information is hidden away in the depths of these forums.

[Bill.Thomson]

@pb66

information is hidden away in the depths of these forums.

Aye, you’ve got that right!

[glyn.hudson]

Sorry, I do my best

Things will occasionally get missed, this doesn’t mean their unappreciated.

[pb66 (Paul)]

That wasn’t aimed at you specifically, just a general observation of the way things work around here sometimes.

If a good idea doesn’t fit the need of the day it generally gets blown off and lost rather than appreciating it as a good idea on the whole and adding it to a plan or todo list as you have done in this thread, it’s much easier to remove something from a todo list after further consideration than it is to try and remember past things that were not of particular interest at the time.

[pb66 (Paul)]

@glyn.hudson

Let’s stick with rpi-rw and rpi-ro, too many scripts depend on these commands to consider changing unless there is a very compelling reason to.

I agree it’s not something worth doing on a whim. especially if it could cause a clash with a fuller script (like the one I was working on). One day I may pick this up again as not all emonbases have to have a webserver running and for some of us ssh if still the preferred option.

Worth noting though, that “rpi” script also had backward compatibility provided by adding

alias rpi-ro='rpi -ro'
alias rpi-rw='rpi -rw'

to the bashrc much like Andy suggested above.

And it also tested if the OS was in RO or RW mode when rpi -rw or -ro was used and only remounted if needed, it also provided a way that scripts could use rpi to “unlock if needed” and then “re-lock if previously locked” so that any scripts using rpi to unlock/lock would not alter the current state set by the user, much more ‘ssh’ user friendly.

[mattwire (Matthew Wire)]

  then
    PS1='\[\033[01;31m\]\u@\h${fs_mode:+($fs_mode)}\[\033[00m\]:\[\033[01;34m\]\W\[\033[00m\]\$ '
  else
    PS1='\[\033[01;32m\]\u@\h${fs_mode:+($fs_mode)}\[\033[00m\]:\[\033[01;34m\]\W\[\033[00m\]\$ '

Changing the \W to \w gives you the full path to the current working directory and is probably more useful.

[glyn.hudson]

Just to put some closure on this thread, I have decided to stick with 4GB as the default emonSD card size. After flashing to a card larger than 4GB to SD card the data partition can be expanded by running:

$ sudo emonSDexpand

Then following prompts.

A new SD card image is currently in beta, see thread:

Archive: emonSD-07Nov16 RELEASE

I’ve put together a new emonSD pre build Raspberry Pi SD card incorporating many changes and some important security updates. It would be great if anyone could test the new image (@jon ?:blush:) and report back if it works ok for you. Emocms data can be migrated using built-in Emoncms backup (import / export) module: Import / Backup - Guide | OpenEnergyMonitor Full emonSD changelog & Download page (Wiki) emonSD-07Nov16 BETA File System Stick with 4GB min SD card (8GB+ recommended). Expand…

[glyn.hudson]

@mattwire

Changing the \W to \w gives you the full path to the current working directory and is probably more useful.

Thanks, I have made the change :

fix URL comment, change to full path