How to disable Mozilla Firefox upgrading.

Keep Mozilla Firefox from upgrading, edit profile - prefs.js

if the following isn't present in some form, add this line to stop upgrading.

user_pref("app.update.enabled", false);

Used to stop from upgrading past point where reference feature was killed by Mozilla bad design decision.

https://www.technipages.com/enable-disable-automatic-updates-in-firefox


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Command line access to esxi server info, networking config

vim-cmd hostsvc/net/info | grep "mac ="

https://communities.vmware.com/thread/187557

esxcfg-info
esxcfg-scsidevs -l
esxcfg-nas -l

Raspbian upgrade process and notes

Upgrade Raspbian releases
https://www.raspberrypi.org/documentation/raspbian/updating.md

sudo apt update

sudo apt full-upgrade 

Check Raspberry pi release
https://www.meccanismocomplesso.org/en/how-to-for-raspberry-checking-the-raspbian-version-update-upgrade/

cat /etc/os-release

make sure lsb_release is installed

sudo apt-get -y install lsb_release
lsb_release -a

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Find directories of certain (744) permissions and change them to 755

For some reason some directories are set to 744 permission from when saved from some systems. 

They need to be 755 for the system to properly back them up.

This will change the permissions with a chmod after showing them.
find . -type d -perm 744 -print -exec ls -ld {} \;

find . -type d -perm 744 -exec chmod 755 {} \;

Nice page of examples of chmod is here

https://www.tecmint.com/35-practical-examples-of-linux-find-command/

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setting python version on Ubuntu

Adapted from this link

https://unix.stackexchange.com/questions/410579/change-the-python3-default-version-in-ubuntu


 sudo update-alternatives --install /usr/bin/python python /usr/bin/python3.5 1

annoying note #1.  Pip install is fskced up on Ubuntu.  It installs a wrapper for python-pip, but doesn't install the underlying python 3 main version.

so do this:

sudo apt-get -y install python3-pip

if ubuntu unattended upgrade is running, kill it by editing

/etc/apt/apt.conf.d/10periodic

APT::Periodic::Update-Package-Lists "1";

change the 1 to 0, and reboot (easiest).  If update is in progress

killing the scripts is a big PITA. 

https://linoxide.com/ubuntu-how-to/enable-disable-unattended-upgrades-ubuntu-16-04/
if you have to remove pip to start over use:
sudo apt-get purge python-pip

upgrade pip with

pip3 install --user --upgrade pip

Install mongo db
https://www.digitalocean.com/community/tutorials/how-to-install-mongodb-on-ubuntu-18-04





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shell in a box centos 8

still not found in epel release

help on this page

https://www.centos.org/forums/viewtopic.php?t=61994

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change hostname centos 8

edit /etc/hostname and /etc/hosts

https://www.cyberciti.biz/faq/centos-8-change-hostname-computer-name-command/

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