Kubuntu 26.04 - can't start browser or KIO file errors? this might be of use :

Help
1

root@hawk:/var/www/NicerAppWebOS-v6.y.z/domains/nicer.app/NicerAppWebOS/scripts.maintenance# cat fixPermissions_kubuntu_nicer.app.sh
#!/bin/bash
while true; do
mode=$(stat -c %a /run/user/1000)
if [ “$mode” != “700” ]; then
echo “$(date): /run/user/1000 is now $mode !”
# optional: automatically fix it
chmod 700 /run/user/1000
fi
mode=$(stat -c %a /tmp/runtime-gavan)
if [ “$mode” != “700” ]; then
echo “$(date): /tmp/runtime-gavan is now $mode !”
# optional: automatically fix it
chmod 700 /tmp/runtime-gavan
fi
mode=$(stat -c %a /tmp/snap-private-tmp)
if [ “$mode” != “700” ]; then
echo “$(date): /tmp/snap-private/tmp is now $mode !”
# optional: automatically fix it
chmod -R 700 /tmp/snap-private-tmp/
chown -R root:root /tmp/snap-private-tmp/
fi

chmod 755 /usr /usr/bin /usr/bin/readlink /usr/bin/dirname /usr/bin/cat /bin/bash
chown root:root /usr/bin/readlink /usr/bin/dirname /usr/bin/cat
sleep 2
done
root@hawk:/var/www/NicerAppWebOS-v6.y.z/domains/nicer.app/NicerAppWebOS/scripts.maintenance# ./fixPermissions_kubuntu_nicer.app.sh

good luck, if your browser stops working :wink:

hint, save this script somewhere just in case :smiley:

2
  1. Did you make it yourself?
  2. Can you verify this issue is not unique to Kubuntu?
3

1 : no, grok.com helped. i just put the commands together in a script.
2 : you’re in luck; i just re-installed my laptop. i can install any other gui distro on it to test it for you.