Get the command name, remove the first line of cpu ratio and add it to cpu_usage.$$
ps -eocomm,pcpu | tail -n +2 >> cpu_usage.$$
Create a process array in awk, use the command name as the key, the cpu ratio as the value, and then superimpose the value
Use sort to reverse the second column to sort the first ten rows by key.
cat cpu_usage.$$ | awk '{process[$1]+=$2;} END{for(i in process){printf("%-20s %s\n",i,process[i]);}}' \ | sort -nrk 2 | head >> `date +%F`.cpu_usage
awk's if for is in a c-like format
The same can be obtained
ps -eo comm,pmem get memory usage
ps -eo comm,user,tty,nice get the user who started the process, associated tty, priority
pgrep command to get the pid of the command