jirihorky / privbind Goto Github PK

Show an more specific running example in the man page or the readme page would be great:

This is my note on using tomcat.
In catalina.sh, I added CATALINA_OPTS="-Djava.net.preferIPv4Stack=true"

And I changed one line from

eval $_NOHUP "\"$_RUNJAVA\"" "\"$LOGGING_CONFIG\"" $LOGGING_MANAGER $JAVA_OPTS $CATALINA_OPTS \

to

 eval privbind -u jack -g jack -n 2 $_NOHUP "\"$_RUNJAVA\"" "\"$LOGGING_CONFIG\"" $LOGGING_MANAGER $JAVA_OPTS $CATALINA_OPTS \

It says

 privbind: setgroups: Operation not permitted

If i do not specify the group, it says the same thing, then I created a specific group: ordinary. and specify the group with -g ordinary

sudo addgroup ordinary
sudo usermod -G ordinary -a jack

I still got the same message. Anyone knows where I went wrong?

By the way, the user who submitted the commands is jack.
groups jack gives

jack : jack sudo ordinary

and uname -a gives

 Linux jackPC 4.10.0-38-generic #42-Ubuntu SMP Tue Oct 10 13:24:27 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

thanks.
jack