I've had an issue over the last few days with high CPU usage. It's at a very constant ~60%. I have tried using htop to identify the culprit, but unfortunately the command section is blank (as below) is there any other way to find out what is causing this?
top -bn1 -o %CPU | head -10
1. top - 07:52:10 up 8:26, 1 user, load average: 16.81, 17.01, 17.01
2. Tasks: 1281 total, 3 running, 1278 sleeping, 0 stopped, 0 zombie 3 .%Cpu(s): 59.6 us, 0.9 sy, 0.0 ni, 39.2 id, 0.2 wa, 0.0 hi, 0.1 si, 0.0 st
4. KiB Mem : 13191574+total, 55804160 free, 4702116 used, 71409464 buff/cache
5. KiB Swap: 2146300 total, 2146300 free, 0 used. 12626230+avail Mem
1. PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2. 35229 root 20 0 201640 33364 8 S 1606 0.0 7201:29 kcompactd0
3. 190779 www-data 20 0 34428 2864 2520 R 27.8 0.0 0:00.05 ps
4. 190766 chrisha+ 20 0 42908 4632 3096 R 16.7 0.0 0:00.05 top
Samples: 624K of event 'cycles:pp', Event count (approx.): 47188610547560
Children Self Command Shared Object Symbol
43.52% 43.52% khugepaged perf-2148.map [.] 0x00007f043ea0451c
34.95% 0.00% khugepaged [unknown] [k] 0xb82697d57384ff
23.33% 0.00% swapper [kernel.kallsyms] [k] cpu_startup_entry
23.33% 0.00% swapper [kernel.kallsyms] [k] call_cpuidle
23.33% 0.00% swapper [kernel.kallsyms] [k] cpuidle_enter
23.33% 0.00% swapper [kernel.kallsyms] [k] cpuidle_enter_state
23.33% 23.33% swapper [kernel.kallsyms] [k] intel_idle
23.33% 0.00% swapper [kernel.kallsyms] [k] start_secondary
8.61% 8.61% khugepaged perf-2148.map [.] 0x00007f043ea045a9
6.26% 6.26% khugepaged perf-2148.map [.] 0x00007f043ea04562
6.26% 6.26% khugepaged perf-2148.map [.] 0x00007f043ea044d5
4.66% 0.00% khugepaged [unknown] [.] 0x60da8b8ebfc1e9d3
4.10% 4.10% khugepaged perf-2148.map [.] 0x00007f043ea044d9
2.33% 0.00% khugepaged [unknown] [.] 0x53c4485f4ccc81a7
2.05% 2.05% khugepaged perf-2148.map [.] 0x00007f043ea04551
2.04% 2.04% khugepaged perf-2148.map [.] 0x00007f043ea04582
2.04% 2.04% khugepaged perf-2148.map [.] 0x00007f043ea04432
2.04% 0.00% khugepaged [unknown] [.] 0xe7fae4d7797426a3
2.04% 0.00% khugepaged [unknown] [.] 0x99ed63e52813389a
2.04% 0.00% khugepaged [unknown] [.] 0x22e88046aa4271e9
2.04% 0.00% khugepaged [unknown] [.] 0xf6b61756079b9307
2.04% 0.00% khugepaged [unknown] [.] 0xf495f49b38bfec81
2.04% 0.00% khugepaged [unknown] [.] 0x2f82447c2be2c54e
2.04% 0.00% khugepaged [unknown] [.] 0x8d6771a1474a5986
2.04% 0.00% khugepaged [unknown] [.] 0xbbb91e1e0f7a63c3
2.04% 0.00% khugepaged [unknown] [.] 0x3c46bf1036aee583
2.04% 0.00% khugepaged [unknown] [.] 0xd9cacbeba97900c4
2.04% 0.00% khugepaged [unknown] [.] 0x25ea1d64a14a6a3a
2.04% 0.00% khugepaged [unknown] [.] 0x909e31f7d38dbe07
2.04% 0.00% khugepaged [unknown] [.] 0x315aba88ba39c812
2.04% 0.00% khugepaged [unknown] [.] 0xe8cbb184c0edf584
2.04% 0.00% khugepaged [unknown] [.] 0xefa017bde7f04534
1.78% 0.00% khugepaged [unknown] [.] 0x9e902574c17241ad
1.56% 0.00% perf perf [.] 0xffffffffffc5e123
sudo ls -l /proc/23870/exe
lrwxrwxrwx 1 root root 0 May 18 01:28 /proc/23870/exe -> /tmp/oom_reaper
top -bn1 -o %CPU | head -10and post the output here by editing your question. – DK Bose May 17 '18 at 05:49sudo ls -l /proc/<PID with high CPU usage>/exe, please. Thecryptomakes me think your server is hacked and running a cryptocurrency miner. – muru May 18 '18 at 06:43/tmp. You've been hacked. – muru May 18 '18 at 21:50