debian 'f' 命令?

Cla*_*diu 0 debian command

top 显示:

 PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
7476 root      20   0  1168  632  368 R  100  0.0  12:31.14 f
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哪个f

claudiu@hussie:~$ which f
/bin/f
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那是什么?

claudiu@hussie:~$ man f
No manual entry for f
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多少?

31755 ?        Z      0:02 [f] <defunct>
32094 ?        Ss     0:00 /bin/sh -c f Opyum Team
32096 ?        S     28:02 f Opyum Team
32120 ?        Z      0:00 [f] <defunct>
32132 ?        Ss     0:00 /bin/sh -c f Opyum Team
32134 ?        S     46:20 f Opyum Team
32594 ?        Ss     0:00 /bin/sh -c f Opyum Team
32595 ?        S      1:46 f Opyum Team
32620 ?        Z      0:00 [f] <defunct>
32674 ?        Ss     0:00 /bin/sh -c f Opyum Team
32676 ?        S      0:41 f Opyum Team
32695 ?        Z      0:00 [f] <defunct>
32710 ?        Ss     0:00 /bin/sh -c f Opyum Team
32711 ?        S     91:38 f Opyum Team
32719 ?        Ss     0:00 /bin/sh -c f Opyum Team
32720 ?        S      0:39 f Opyum Team
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哦,我的...

发生了什么?

Bar*_*rim 7

服务器已被黑客入侵。谷歌“opyum 团队”。尽快使服务器脱机并从已知良好的备份中恢复。