Linux下的ps命令即为查看当前进程的命令工具
经常用该命令查找系统中应用程序的进程状况：
例如，需要查看 superset的启动情况，输入如下：
ps -ef|grep superset
[jhadmin@tandelin unischeduler]$ ps -ef|grep superset
jhadmin 25275 1 0 19:04 pts/2 00:00:01 /jhbigdata/python-3.6.0/bin/python3 /jhbigdata/python-3.6.0/bin/gunicorn -w 2 --timeout 60 -b 0.0.0.0:8088 --limit-request-line 0 --limit-request-field_size 0 superset:app
jhadmin 25286 25275 2 19:04 pts/2 00:00:18 /jhbigdata/python-3.6.0/bin/python3 /jhbigdata/python-3.6.0/bin/gunicorn -w 2 --timeout 60 -b 0.0.0.0:8088 --limit-request-line 0 --limit-request-field_size 0 superset:app
jhadmin 25287 25275 1 19:04 pts/2 00:00:13 /jhbigdata/python-3.6.0/bin/python3 /jhbigdata/python-3.6.0/bin/gunicorn -w 2 --timeout 60 -b 0.0.0.0:8088 --limit-request-line 0 --limit-request-field_size 0 superset:app
