Question on permission
"alsamixer" can only be evoked as root.
bash-3.00$ which alsamixer After running
# chmod u+s /usr/bin/alsamixer
it can be started by all users but a grey window only without colour.
How to only authenticate "satimis" to start it in colour window not all users and how to make it?
You should add your user to the audio group (see /etc/groups).
Audio group should be able to read and write on /dev/mixer, so your user (in the group audio) should setup mixer values.
Re: Group permissions
Tks for your advice.
I already fixed the problem with following steps;
There was a mistake on following 2 lines on /etc/group
Deleted "audio:!:11:satimis" and amended the 2nd line as "audio:x:11:satimis"
# chown root:audio /usr/bin/alsamixer
# chmod -c 550 /usr/bin/alsamixer
Now "alsamixer" can be started as "satimis". The remaining minor problem is as "satimis" the vertical bar is black, not colour. Volumn can be adjusted.
As root the bar is coloured. I'm now searching for its cause. Any advice? TIA