250430
タスクマネージャー
hitto@mdns:/usr/bin$ top
top - 04:54:59 up 6 days, 15:50, 2 users, load average: 0.00, 0.00, 0.00
Tasks: 102 total, 1 running, 101 sleeping, 0 stopped, 0 zombie
%Cpu(s): 0.0 us, 3.7 sy, 0.0 ni, 96.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
MiB Mem : 1967.5 total, 478.8 free, 363.8 used, 1316.4 buff/cache
MiB Swap: 0.0 total, 0.0 free, 0.0 used. 1603.7 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 20 0 23180 14652 10172 S 0.0 0.7 0:15.98 /sbin/init
2 root 20 0 0 0 0 S 0.0 0.0 0:00.05 [kthreadd]
3 root 20 0 0 0 0 S 0.0 0.0 0:00.00 [pool_workqueue_release]
4 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 [kworker/R-rcu_gp]
5 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 [kworker/R-sync_wq]
6 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 [kworker/R-slub_flushwq]
7 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 [kworker/R-netns]
10 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 [kworker/0:0H-events_highpri]
12 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 [kworker/R-mm_percpu_wq]
13 root 20 0 0 0 0 I 0.0 0.0 0:00.00 [rcu_tasks_kthread]
14 root 20 0 0 0 0 I 0.0 0.0 0:00.00 [rcu_tasks_rude_kthread]
15 root 20 0 0 0 0 I 0.0 0.0 0:00.00 [rcu_tasks_trace_kthread]
16 root 20 0 0 0 0 S 0.0 0.0 0:01.42 [ksoftirqd/0]
17 root 20 0 0 0 0 I 0.0 0.0 0:34.91 [rcu_preempt]
18 root 20 0 0 0 0 S 0.0 0.0 0:00.00 [rcu_exp_par_gp_kthread_worker/0]
19 root 20 0 0 0 0 S 0.0 0.0 0:00.01 [rcu_exp_gp_kthread_worker]
20 root rt 0 0 0 0 S 0.0 0.0 0:03.19 [migration/0]
21 root -51 0 0 0 0 S 0.0 0.0 0:00.00 [idle_inject/0]
22 root 20 0 0 0 0 S 0.0 0.0 0:00.00 [cpuhp/0]
23 root 20 0 0 0 0 S 0.0 0.0 0:00.00 [kdevtmpfs]
24 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 [kworker/R-inet_frag_wq]
26 root 20 0 0 0 0 S 0.0 0.0 0:00.00 [kauditd]
27 root 20 0 0 0 0 S 0.0 0.0 0:00.12 [khungtaskd]
28 root 20 0 0 0 0 S 0.0 0.0 0:00.00 [oom_reaper]
30 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 [kworker/R-writeback]
31 root 20 0 0 0 0 S 0.0 0.0 0:18.20 [kcompactd0]
32 root 25 5 0 0 0 S 0.0 0.0 0:00.00 [ksmd]
33 root 39 19 0 0 0 S 0.0 0.0 0:00.00 [khugepaged]
34 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 [kworker/R-kintegrityd]
35 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 [kworker/R-kblockd]
36 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 [kworker/R-blkcg_punt_bio]
37 root -51 0 0 0 0 S 0.0 0.0 0:00.00 [irq/9-acpi]
38 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 [kworker/R-tpm_dev_wq]
39 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 [kworker/R-ata_sff]
40 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 [kworker/R-md]
41 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 [kworker/R-md_bitmap]
42 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 [kworker/R-edac-poller]
43 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 [kworker/R-devfreq_wq]
44 root -51 0 0 0 0 S 0.0 0.0 0:00.00 [watchdogd]
45 root 0 -20 0 0 0 I 0.0 0.0 0:02.35 [kworker/0:1H-kblockd]
46 root 20 0 0 0 0 S 0.0 0.0 0:00.00 [kswapd0]
47 root 20 0 0 0 0 S 0.0 0.0 0:00.00 [ecryptfs-kthread]
48 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 [kworker/R-kthrotld]
49 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 [kworker/R-acpi_thermal_pm]
50 root 20 0 0 0 0 S 0.0 0.0 0:00.00 [scsi_eh_0]
hitto@mdns:/usr/bin$ vmstat 5
procs -----------memory---------- ---swap-- -----io---- -system-- -------cpu-------
r b swpd free buff cache si so bi bo in cs us sy id wa st gu
1 0 0 490312 101488 1246524 0 0 1 7 39 0 0 0 100 0 0 0
0 0 0 490312 101488 1246564 0 0 0 66 83 90 0 0 99 0 0 0
0 0 0 490312 101488 1246564 0 0 0 6 45 60 0 0 100 0 0 0
0 0 0 490312 101488 1246564 0 0 0 0 40 58 0 0 100 0 0 0
0 0 0 490312 101488 1246564 0 0 0 27 54 72 0 0 100 0 0 0
0 0 0 490312 101488 1246564 0 0 0 0 42 60 0 0 100 0 0 0
^C
hitto@mdns:/usr/bin$
cpuinfo
hitto@mdns:/usr/bin$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 6
model name : Common KVM processor
stepping : 1
microcode : 0x1
cpu MHz : 2399.998
cache size : 16384 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx lm constant_tsc nopl xtopology cpuid tsc_known_freq pni cx16 x2apic hypervisor lahf_lm cpuid_fault pti
bugs : cpu_meltdown spectre_v1 spectre_v2 spec_store_bypass l1tf mds swapgs itlb_multihit mmio_unknown bhi
bogomips : 4799.99
clflush size : 64
cache_alignment : 128
address sizes : 40 bits physical, 48 bits virtual
power management:
bogomips: 起動時にbogo(いかれた)mips(mi % sec)意味のないforを回して何回実行されたかを書いている。あまり当てにならない
tree
hitto@mdns:/usr/local$ ls
bin etc games include lib libexec man sbin share srcユーザーが作ったプログラムを入れるらしい
hitto@mdns:/usrコマンドラインから実行するコマンドがある
hitto@mdns:/etc$ ls
ModemManager cron.monthly group- libblockdev multipath.conf pollinate services ubuntu-advantage
PackageKit cron.weekly grub.d libibverbs.d nanorc profile sgml ucf.conf
X11 cron.yearly gshadow libnl-3 needrestart profile.d shadow udev
adduser.conf crontab gshadow- locale.alias netconfig protocols shadow- udisks2
alternatives cryptsetup-initramfs gss locale.conf netplan python3 shells ufw
apparmor crypttab hdparm.conf locale.gen network python3.12 skel update-manager
apparmor.d dbus-1 host.conf localtime networkd-dispatcher qemu sos update-motd.d
apport debconf.conf hostname logcheck networks rc0.d ssh update-notifier
apt debian_version hosts login.defs newt rc1.d ssl usb_modeswitch.conf
avahi default hosts.allow logrotate.conf nftables.conf rc2.d subgid usb_modeswitch.d
bash.bashrc deluser.conf hosts.deny logrotate.d nginx rc3.d subgid- vconsole.conf
bash_completion depmod.d init.d lsb-release nsswitch.conf rc4.d subuid vim
bash_completion.d dhcp initramfs-tools lvm opt rc5.d subuid- vmware-tools
bindresvport.blacklist dhcpcd.conf inputrc machine-id os-release rc6.d sudo.conf vtrgb
binfmt.d dpkg iscsi magic overlayroot.conf rcS.d sudo_logsrvd.conf wgetrc
byobu e2scrub.conf issue magic.mime overlayroot.local.conf resolv.conf sudoers xattr.conf
ca-certificates environment issue.net manpath.config pam.conf rmt sudoers.d xdg
ca-certificates.conf ethertypes kernel mdadm pam.d rpc supercat xml
cloud fstab landscape mime.types passwd rsyslog.conf sysctl.conf zsh_command_not_found
console-setup fuse.conf ld.so.cache mke2fs.conf passwd- rsyslog.d sysctl.d
credstore fwupd ld.so.conf modprobe.d perl screenrc sysstat
credstore.encrypted gai.conf ld.so.conf.d modules pki security systemd
cron.d gnutls ldap modules-load.d plymouth selinux terminfo
cron.daily groff legal mtab pm sensors.d timezone
cron.hourly group libaudit.conf multipath polkit-1 sensors3.conf tmpfiles.d
hitto@mdns:/etc$
いろんなプログラムの設定、起動条件などを入れる
目的 使うべきコマンド
起動直後のカーネルやハード情報 dmesg or cat /var/log/dmesg
伝統的なsyslog確認 cat /var/log/syslog
systemdの詳細なログ journalctl（フィルタ機能あり）log
共通鍵、公開鍵暗号
共通鍵
cpuパワーをくわない
公開鍵
cpuパワーいる
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