Thank you very much 
Open a cmd window on Windows, or terminal on Linux.
Nothing bad happened… except the black hole in the garden 
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Do I need to sign in as root first?
No you don’t have to do that, do as you can see in the picture.
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I suspect there’s a minus sign missing from the command: - -user
$ pm uninstall -k --user 0 foundation.e.weather
Try it again.
Thank you, @andrelam
My attempt was successful.
The number of apps was reduced by one.
But icon “Weather” is still displayed inside “Apps”
Additional text:
Weather
0 B
Not installed for users
Is that right?
A single “minus” ("-") sign in front of k, but double in front of user ?
Welcome, yes i noticed that too, don’t know if that’s normal. This is the only way i know of at the moment. In the future they will be uninstallable, be patient
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Thank you for “Welcome”. Well, I’m in good spirits about /e/ in 2020. A default option to uninstall /e/ apps is the only way to go instead of just disabling or deleting them. Right now /e/ is just an interesting game for me. And I’m practicing patience ;o)
I’ve learned a little something new. The adb command => pm list packages|grep -i weather
shows me these 4 packages:
package: org.lineageos.openweathermapprovider
package: foundation.e.weather
package: org.cyanogenmod.weatherservice
package: org.cyanogenmod.weather.provider
Well, it was uninstalled a few days ago => foundation.e.weather
Now I uninstalled the other 3 apps as well and reboot. Yeah /e/ boots as usual.
And see there: The above mentioned icon “Weather” and the additional text (Weather 0 B Not installed for users) is no longer available.
I can’t (yet) estimate the effects of uninstalling on the system. Let’s see what it looks like after the next /e/ update.
Hi @archie did you install the new system update? Any problem due to having previously wiped out the stupid weather app? Thx.
Hello @dotcoma. No, so far I can’t see any problems. /e/ OS Update - OTA - accepts the non-existence of the weather app and takes this into account, which means the W-app will not be installed again.
Addition’20
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How to open a cmd windows on the smartphone, please?
You can’t. CMD command prompt is a Windows® specific thing. With an Android Terminal Emulator App, you can emulate e.g. a VT-100 terminal to access the command line on the smartphone.
is it dangerous? lol
yesterday, I received my /e/ refurbished smartphone and I would like to delete some apps (weather, message, mail…)
Do you advise a terminal app, please?
I’m trying but I get “aborted”
@Manuekris, every intervention in the running system has its risks. But so far I have not been able to detect any “dangerous” system reactions in my experiments.
Before you make any changes, I recommend that you make a system backup to an external microSD card. That way you can your /e/ OS “stable build” save and in case of an emergency like going back to the beginning /e/ OS ROM.
With the already installed TWRP Recovery we can make a device-dependent backup (Nandroid-Backup) and pull this data over to the PC or store it on an external mircroSD card. See also → A complete system backup without root with TWRP Custom Recovery including EFS / IMEI on external microSD card
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Terminal and Command Prompt (CMD) only work on my desktop computer. For lack of experience I cannot recommend a terminal app. Have a look at the → F-Droig Store.