cpuusage and ps_tmp will be gernerate by the daemon, so ignore them
remove auto generate files
finish monitor's ps format, sort by cpuusage and calculate cpuusage
finish mail to user and parse the command args
change variable to capital
modify to let it has path variable (use to place log file)
record the process' pid
add RC script to control sysmonitor
let it can be load auto while
Read LOGFILE environment variable. If it is not set, use "/tmp/sysmonitor"