3 update-alternatives
--install /opt
/bin
/free free
/opt
/bin
/procps-free
80
4 update-alternatives
--install /opt
/bin
/kill kill /opt
/bin
/procps-kill
80
5 update-alternatives
--install /opt
/bin
/ps ps
/opt
/bin
/procps-ps
80
6 update-alternatives
--install /opt
/bin
/top top
/opt
/bin
/procps-top
80
7 update-alternatives
--install /opt
/bin
/uptime uptime
/opt
/bin
/procps-uptime
80
8 update-alternatives
--install /opt
/bin
/watch watch
/opt
/bin
/procps-watch
80
