python change path for one dir up, safe method

NEWPATH = os.path.split(OLDPATH.rstrip(os.sep))[0]

Recursive chmod with sudo

For directories (which are usually not too many):

sudo chmod 755 $(sudo find path/to/dir -type d)

for files (which are numerous):

find path/to/dir -type f -print0 | sudo xargs -0 chmod 664

Sources:
https://superuser.com/questions/91935/how-to-recursively-chmod-all-directories-except-files
https://www.linuxquestions.org/questions/linux-newbie-8/unable-to-execute-bin-chmod-argument-list-too-long-908143/

KDE disable super_L (windows key) key shortcut as menu launcher

In kde plasma 5.8 the super/win key is also used to trigger the launcher, when pressed and released without combining it with another key. To disable the feature, put

[ModifierOnlyShortcuts]
Meta=

in ~/.config/kwinrc.

https://superuser.com/questions/1156130/kde-disable-super-l-windows-key-key-shortcut-as-menu-luncher