1.top/htop
View memory, cpu / q exit
2.ps view all current processes
ps -ef
ps -ef | grep python
ps -aux
3. Linux zombie process troubleshooting
#yum install -y htop iotop smem
#View the amount of memory used by the process
smem -k -s uss
#View the internal percentage used by the process
smem -p -s uss
#View the amount of memory used by each user
smem -u -k
#View the amount of memory used by a single process
smem -P ./perf -k
#Get the 10 processes with the largest memory usage
ps aux | head -1; ps aux | sort -nr -k4 | head -10
#Get the 10 processes with the largest CPU usage
ps aux | head -1; ps aux | sort -nr -k3 | head -10
#Find zombie processes
ps -e -o stat, ppid, pid, cmd | grep -e '^[zZ]'
#Kill the dead process
ps -e -o stat,ppid,pid,cmd|grep -e '^[zZ]'|awk '{print $2}'|xargs kill -9