rc.local run twice – how to fix?

I’m running a NVIDIA L4T (linux for tegra) based Ubuntu 14.04 image on a Tegra K1 board. I added a line to the otherwise empty (save for the bash -e comment at the beginning) /etc/rc.local file. That line is just an echo.

I am looking on the debug serial console of the Tegra board.

When I boot the system, the text is output as expected. Then, roughly 3 minutes later, some more things are reported by the OS, and then evidently, rc.local is run again, because I see my text a second time.

Why is that / how can it be fixed?

Edit: forgot the output listing:

 * Starting DNS forwarder and DHCP server dnsmasq                        [ OK ] /etc/resolvconf/update.d/libc: Warning: /etc/resolv.conf is not a symbolic link to /run/resolvconf/resolv.conf  * speech-dispatcher disabled; edit /etc/default/speech-dispatcher  * Starting NTP server ntpd                                              [ OK ] saned disabled; edit /etc/default/saned hellooooo!!!! (from /etc/rc.local)  Ubuntu 14.04.6 LTS tegra-ubuntu ttyS0  tegra-ubuntu login: ubuntu (automatic login)  Last login: Sat Jan  1 00:03:59 UTC 2000 from 172.16.240.31 on pts/2 Welcome to Ubuntu 14.04.6 LTS (GNU/Linux 3.10.40-2.8.6+g2c7a3c3af726 armv7l)   * Documentation:  https://help.ubuntu.com/  New release '16.04.6 LTS' available. Run 'do-release-upgrade' to upgrade to it.  ubuntu@tegra-ubuntu:~$    * Starting early crypto disks...                 [ OK ] sh: echo: I/O error  * Setting up X socket directories...                                    [ OK ]  * Starting DNS forwarder and DHCP server dnsmasq                                * (already running)  * speech-dispatcher disabled; edit /etc/default/speech-dispatcher  * Starting NTP server ntpd                                              [ OK ] saned disabled; edit /etc/default/saned hellooooo!!!! (from /etc/rc.local) 

Is there a way to increase a creature’s size category twice?

The Enlarge/Reduce spell can make a creature one size category bigger.

Considering that two spell effects of the same nature cannot stack at the same place and time (you can’t cast two Enlarges on the same Medium target to make it Huge), is there another way (spell, item, etc.) to increase a target’s size category that could be stacked with the Enlarge effect in order to increase the target’s size category twice ?

Accidentally added a PPA twice

Today, using add-apt-repository, I accidentally added a PPA that I had already added a few weeks ago.

Do I need to undo this, and if so, how do I undo it?

This is not a duplicate of this question. I want to know whether adding a duplicate PPA will cause a problem. There are no duplicate files in /etc/apt/sources.list.d.

Does the Heavy Armor Master feat reduce damage twice against a mixed damage attack?

Displacer Beasts have a Tentacle attack that does 7 (1d6 + 4) bludgeoning damage plus 3 (1d6) piercing damage. Does the bludgeoning and piercing damage reduction granted by Heavy Armor Master reduce that total damage by 6 or 3? If only 3, what determines which of the two damage types is reduced?

Would a 6th level Aasimar Celestial Patron Warlock be able to add twice their charisma mod to eldritch blast?

Aasimar (at least Scourge and Protector), get an ability that allows them to add their level in radiant damage to any damage roll they make, and the Celestial Warlock gets to add their charisma modifier to any radiant damage they do.

Additionally, if that warlock has Agonizing Blast, that also makes their eldritch blast do additional damage equal to the character’s charisma modifier.

Would all three features stack (once per turn) on an eldritch blast that hits, so that it does extra damage equal to twice the warlock’s charisma mod+level?

Does the Raven Queen’s Sentinel Raven apply a bonus to passive Perception twice?

The Raven Queen, an Unearthed Arcana warlock patron, grants a raven companion who assists you with Perception checks whilst perched on your shoulder.

While the raven is perched on your shoulder, you gain darkvision with a range of 30 feet and a bonus to your passive Wisdom (Perception) score and to Wisdom (Perception) checks. The bonus equals your Charisma modifier. While perched on your shoulder, the raven can’t be targeted by any attack or other harmful effect; only you can cast spells on it; it can’t take damage; and it is incapacitated.

This question arises when you need to calculate passive Perception. From PHB 175,

A passive check is a special kind of ability check that doesn’t involve any die rolls. Such a check can represent the average result for a task done repeatedly, such as searching for secret doors over and over again, or can be used when the DM wants to secretly determine whether the characters succeed at something without rolling dice, such as noticing a hidden monster.

Here’s how to determine a character’s total for a passive check:

10 + all modifiers that normally apply to the check

If the character has advantage on the check, add 5. For disadvantage, subtract 5. The game refers to a passive check total as a score.

For example, if a 1st-level character has a Wisdom of 15 and proficiency in Perception, he or she has a passive Wisdom (Perception) score of 14.

The rules on hiding in the “Dexterity” section below rely on passive checks, as do the exploration rules in chapter 8.

Since the raven boosts Perception and passive Perception, would the warlock’s passive Perception be equal to 10+WIS+proficiency (if applicable)+CHA (bonus to perception)+CHA (bonus to passive perception)?

V18.04.3LTS troubled boot up. Tries twice

*Hello. I have V18.04.3 LTS in dual boot with WIN XP. Several upgrades over the years to this point. When I select UBUNTU from the Menu it will start a boot then stop and start over again with running of the BIOS. It will then start but I cannot rely on it after shut-down to reboot normally again. I frequently have to take the Recovery option from the menu and the run some of the options there. * What do I do now? Sincerely, BerryG