** top으로 프로세스 현황을 보면 가끔 좀비 프로세스가 있습니다. 해당 포스팅은 좀비 프로세스 확인 및 제거를 진행합니다.
[root@localhost ]# top
top - 13:21:53 up 362 days, 12:51, 2 users, load average: 0.36, 0.51, 0.60
Tasks: 544 total, 1 running, 541 sleeping, 0 stopped, 2 zombie
Cpu0 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu1 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu2 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu3 : 2.0%us, 0.3%sy, 0.0%ni, 97.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu4 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu5 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu6 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu7 : 10.4%us, 0.7%sy, 0.0%ni, 88.3%id, 0.0%wa, 0.0%hi, 0.7%si, 0.0%st
Mem: 8017812k total, 5458432k used, 2559380k free, 586348k buffers
Swap: 4194300k total, 9648k used, 4184652k free, 1795476k cached
좀비 찾기
** 명령어ps -ef | grep defunct | grep -v grep
[root@localhost ]# ps -ef | grep defunct | grep -v grep root 8019 8017 0 12:01 ? 00:00:00 [unknown-error-t]root 8020 8017 0 12:01 ? 00:00:00 [unknown-error-t]
좀비 죽이기
** 명령어[root@localhost ]# kill -9 8017 root 8019 8017 0 12:01 ? 00:00:00 [unknown-error-t]root 8020 8017 0 12:01 ? 00:00:00 [unknown-error-t]
** 좀비 모두 죽이기
ps -ef | grep defunct | awk '{print $3}' | xargs kill -9
스크립트 작성 (cron 등록후 사용해도됨)
[root@localhost]# vi zombie_kill.sh #! /bin/bash date="$(date "+%Y-%m-%d_%H:%M:%S")" log_dir="경로입력" zombie_check=`ps -ef | grep defunct | grep -v grep | grep -v "\[sh\]"| wc -l` if [ $zombie_check == '0' ]; then exit 0; else echo "==============================================================" >> /$log_dir/zombie_kill.txt ps -ef | grep defunct | grep -v grep | grep -v "\[sh\]" >> /{path}/zombie_kill.txt ps -ef | grep defunct | grep -v grep | grep -v "\[sh\]" | awk '{print $3}' | xargs kill -9 echo "kill zombie process_$date " >> /$log_dir/zombie_kill.txt if [ $zombie_check == '0' ]; then exit 0; else /bin/sh /$log_dir/zombie_kill.sh fi fi
로그 확인
[root@localhost ]# cat zombie_kill.txt ============================================================== root 8019 8017 0 12:01 ? 00:00:00 [unknown-error-t]root 8020 8017 0 12:01 ? 00:00:00 [unknown-error-t] kill zombie process_2017-12-07_13:38:01
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