Package: usermode

"usermode" package binaries on CentOS:

/usr/bin/consolehelper /usr/bin/halt /usr/bin/poweroff /usr/bin/reboot /usr/sbin/userhelper

You may install this package on CentOS with yum install usermode

"usermode" package binaries on Debian:

/usr/bin/consolehelper /usr/bin/consolehelper-gtk /usr/bin/userinfo /usr/bin/usermount /usr/bin/userpasswd /usr/sbin/userhelper

You may install this package on Debian with apt-get install usermode