Linuxトラブルシュートと原因の特定 ref: https://qiita.com/S-T/items/2b48ce0aecb8788617d2

file0.txt

dstat  -tlmnd

file1.txt

ps -ef
ps aux

file2.txt

[root@cent ~]# ps -ef
UID        PID  PPID  C STIME TTY          TIME CMD
root     25172 25063 20 20:34 pts/1    00:00:01 dd if=/dev/zero of=1G.dummy bs=1
root     25174 25159  0 20:34 pts/0    00:00:00 ps -ef
[root@cent ~]# 

file3.txt

[root@cent ~]# ps aux 
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root     25180 16.3  0.1 108984  1668 pts/1    R+   20:37   0:06 dd if=/dev/zero of=1G.dummy bs=1M count=10000
root     25189  0.0  0.0 112676   976 pts/0    R+   20:38   0:00 grep -E --color=auto  dd|RSS
[root@cent ~]# 

file4.txt

root@558aa0d3fa66:/# ps axwf
  PID TTY      STAT   TIME COMMAND
    1 pts/0    Ss     0:00 /usr/bin/python3 -u /sbin/my_init -- bash -l
   10 pts/0    S      0:00 /usr/sbin/syslog-ng --pidfile /var/run/syslog-ng.pid -F --no-caps
   16 pts/0    S      0:00 /usr/bin/runsvdir -P /etc/service
   18 ?        Ss     0:00  \_ runsv cron
   20 ?        S      0:00  |   \_ /usr/sbin/cron -f
   19 ?        Ss     0:00  \_ runsv sshd
   17 pts/0    S      0:00 bash -l
   32 pts/0    R+     0:00  \_ ps axwf
root@558aa0d3fa66:/# 

file5.txt

netstat -an

file6.txt

ps aux | awk '{ if(NR>1){p[$1] += $3; n[$1]++} }END{for(i in p) print p[i], n[i], i}'

file7.txt

ps aux | awk '{ if(NR>1){p[$1] += $4; n[$1]++} }END{for(i in p) print p[i], n[i], i}'