Instructions for connecting Termux's android-tools adb to the current device via Wireless debugging and fixing phantom process killing

1-termux-adb.md

Install android-tools if you haven't already:

pkg update ; pkg upgrade
pkg install android-tools

adb pair 127.0.0.1:port

Where port is taken from the menu shown after clicking from Developer options > Wireless debugging > Pair device with pairing code. Use splitscreen to show the Wireless debugging setting below the Termux app when pairing.

After pairing successfully, run the following commands to either connect or disconnect:

adb connect 127.0.0.1:port

adb disconnect

Where port is shown in the Wireless debugging menu as IP address & Port.

After you're done with adb, make sure to close the daemon:

adb kill-server

2-disable-phantom-process-killing.md

Notice: Disabling phantom process killing might cause battery drainage issues according to this comment, disable it at your own risk. From my experience, I never experienced this issue but that might be because I'm on MIUI so it might be more problematic if your phone OEM doesn't have an aggresive battery saver feature like Samsung or Xiaomi does.

After Termux has connected via Wireless debugging, run the command below to fix phantom process killing. (Android 12L and above)

adb shell "settings put global settings_enable_monitor_phantom_procs false"

connect-disconnect.png

pair.png

BEWARE

BEWARE before disabling these process limitations!
It drained my battery badly, whenever some process kept running in the background.

BEWARE even more that Android is intentionally lying to you about which processes run!
E.g. in Termux and when using adb shell run-as com.termux, I see two different results! Even though it is the same user! And in just adb shell, I see other results again!
I even got into situations where clearly sshd was running (cause I’m freaking using it!), but it just tells me no process matching “sshd” is running at all, and I cannot kill it!
I had to reboot, to get my battery to not drain anymore!

I suspect some severe SElinux and namespace shenenigans.

This behavior is reported in the Termux tutorials. Even if you close Termux, some processes may not die and may remain running.

Interesting, I guess this is one of the few moments where I'm actually thankful for some Android OEM's aggressive battery saver features. Because I never noticed this becoming a problem once I use "Force stop" on the app in MIUI. I'll add this notice to the original post just in case

BEWARE

BEWARE before disabling these process limitations! It drained my battery badly, whenever some process kept running in the background.

BEWARE even more that Android is intentionally lying to you about which processes run! E.g. in Termux and when using adb shell run-as com.termux, I see two different results! Even though it is the same user! And in just adb shell, I see other results again! I even got into situations where clearly sshd was running (cause I’m freaking using it!), but it just tells me no process matching “sshd” is running at all, and I cannot kill it! I had to reboot, to get my battery to not drain anymore!

I suspect some severe SElinux and namespace shenenigans.