[root@localhost ~]# uname -a
Linux localhost.localdomain 5.10.134-13_rc1.an8.aarch64 #1 SMP Mon Dec 5 19:08:09 CST 2022 aarch64 aarch64 aarch64 GNU/Linux
[root@localhost ~]# systemctl list-units --failed
  UNIT          LOAD   ACTIVE SUB    DESCRIPTION                 
● kdump.service loaded failed failed Crash recovery kernel arming

LOAD   = Reflects whether the unit definition was properly loaded.
ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
SUB    = The low-level unit activation state, values depend on unit type.

1 loaded units listed. Pass --all to see loaded but inactive units, too.
To show all installed unit files use 'systemctl list-unit-files'.
[root@localhost ~]# dmesg | grep -iE "error|call trace|failed|tainted"
[    8.725007] ipmi_msghandler: module verification failed: signature and/or required key missing - tainting kernel
[root@localhost ~]# cat /var/log/boot.log | grep -iE "error|call trace|failed|tainted"
[root@localhost ~]# cat /var/log/messages | grep -iE "error|call trace|failed|tainted"
Dec 12 18:13:32 localhost kernel: ipmi_msghandler: module verification failed: signature and/or required key missing - tainting kernel
Dec 12 18:13:53 localhost dbus-daemon[1752]: [system] Activation via systemd failed for unit 'dbus-org.freedesktop.resolve1.service': Unit dbus-org.freedesktop.resolve1.service not found.
Dec 12 18:13:56 localhost kdumpctl[1987]: kdump: Starting kdump: [FAILED]
Dec 12 18:13:56 localhost systemd[1]: kdump.service: Failed with result 'exit-code'.
Dec 12 18:13:56 localhost systemd[1]: Failed to start Crash recovery kernel arming.
[root@localhost ~]# vi 5.10-dvd-min-arm.txt
[root@localhost ~]# tar -zcvf 5.10-dvd-min-arm.tar.gz /var/log/
-bash: tar: 未找到命令
[root@localhost ~]# yum install tar
Some packages version should keep unchanged.
^C
[root@localhost ~]# scp 5.10-dvd-min-arm.txt root@10.12.17.104:/home/sun/Desktop
The authenticity of host '10.12.17.104 (10.12.17.104)' can't be established.
ECDSA key fingerprint is SHA256:ZdWpkZX7vF1YPq+DMBhk7UMjTZoaR6MvDKMfQF6zg7I.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '10.12.17.104' (ECDSA) to the list of known hosts.
root@10.12.17.104's password: 
5.10-dvd-min-arm.txt                                                                         100% 1623     5.9MB/s   00:00    
[root@localhost ~]# tar -zcvf 5.10-dvd-min-arm.tar.gz /var/lo
local/ lock/  log/   
[root@localhost ~]# tar -zcvf 5.10-dvd-min-arm.tar.gz /var/lo
local/ lock/  log/   
[root@localhost ~]# tar -zcvf 5.10-dvd-min-arm.tar.gz /var/log/
-bash: tar: 未找到命令
[root@localhost ~]# yum makecache
^Cping^C^Z - AppStream                           [                                    ===    ] ---  B/s |   0  B     --:-- ETA
[1]+  已停止               /usr/bin/yum.sh makecache
[root@localhost ~]# ping 10.12.17.104
PING 10.12.17.104 (10.12.17.104) 56(84) bytes of data.
64 bytes from 10.12.17.104: icmp_seq=1 ttl=63 time=0.080 ms
^C
--- 10.12.17.104 ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.080/0.080/0.080/0.000 ms
[root@localhost ~]# ping baidu.com
^C
[root@localhost ~]# packet_write_wait: Connection to 10.12.21.13 port 22: Broken pipe
root@sun-PC:/home/sun# ssh-keygen -f "/root/.ssh/known_hosts" -R "10.12.21.13"
# Host 10.12.21.13 found: line 77
/root/.ssh/known_hosts updated.
Original contents retained as /root/.ssh/known_hosts.old
root@sun-PC:/home/sun# ssh 10.12.21.13
The authenticity of host '10.12.21.13 (10.12.21.13)' can't be established.
ECDSA key fingerprint is SHA256:b2hh/aeI05NtT1BhcKFZHaKb04ABH3PsJXcSnGVCkC0.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '10.12.21.13' (ECDSA) to the list of known hosts.
root@10.12.21.13's password: 
[root@localhost ~]# ping baidu.com
^C
[root@localhost ~]# uname -a
Linux localhost.localdomain 5.10.134-13_rc1.an8.x86_64 #1 SMP Mon Dec 5 19:11:36 CST 2022 x86_64 x86_64 x86_64 GNU/Linux
[root@localhost ~]# systemctl list-units --failed
  UNIT          LOAD   ACTIVE SUB    DESCRIPTION                 
● kdump.service loaded failed failed Crash recovery kernel arming

LOAD   = Reflects whether the unit definition was properly loaded.
ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
SUB    = The low-level unit activation state, values depend on unit type.

1 loaded units listed. Pass --all to see loaded but inactive units, too.
To show all installed unit files use 'systemctl list-unit-files'.
[root@localhost ~]# dmesg | grep -iE "error|call trace|failed|tainted"
[    1.307655] pcieport 0000:00:01.2: DPC: error containment capabilities: Int Msg #0, RPExt+ PoisonedTLP+ SwTrigger+ RP PIO Log 6, DL_ActiveErr+
[    1.307917] pcieport 0000:00:01.4: DPC: error containment capabilities: Int Msg #0, RPExt+ PoisonedTLP+ SwTrigger+ RP PIO Log 6, DL_ActiveErr+
[    1.308176] pcieport 0000:00:01.5: DPC: error containment capabilities: Int Msg #0, RPExt+ PoisonedTLP+ SwTrigger+ RP PIO Log 6, DL_ActiveErr+
[    1.385654] RAS: Correctable Errors collector initialized.
[    1.529686] ipmi_msghandler: module verification failed: signature and/or required key missing - tainting kernel
[root@localhost ~]# cat /var/log/boot.log | grep -iE "error|call trace|failed|tainted"
[root@localhost ~]# cat /var/log/messages | grep -iE "error|call trace|failed|tainted"
Dec 12 18:49:28 localhost kernel: pcieport 0000:00:01.2: DPC: error containment capabilities: Int Msg #0, RPExt+ PoisonedTLP+ SwTrigger+ RP PIO Log 6, DL_ActiveErr+
Dec 12 18:49:28 localhost kernel: pcieport 0000:00:01.4: DPC: error containment capabilities: Int Msg #0, RPExt+ PoisonedTLP+ SwTrigger+ RP PIO Log 6, DL_ActiveErr+
Dec 12 18:49:28 localhost kernel: pcieport 0000:00:01.5: DPC: error containment capabilities: Int Msg #0, RPExt+ PoisonedTLP+ SwTrigger+ RP PIO Log 6, DL_ActiveErr+
Dec 12 18:49:28 localhost kernel: RAS: Correctable Errors collector initialized.
Dec 12 18:49:28 localhost kernel: ipmi_msghandler: module verification failed: signature and/or required key missing - tainting kernel
Dec 12 18:49:47 localhost dbus-daemon[1154]: [system] Activation via systemd failed for unit 'dbus-org.freedesktop.resolve1.service': Unit dbus-org.freedesktop.resolve1.service not found.
Dec 12 18:49:53 localhost kdumpctl[1390]: kdump: Starting kdump: [FAILED]
Dec 12 18:49:53 localhost systemd[1]: kdump.service: Failed with result 'exit-code'.
Dec 12 18:49:53 localhost systemd[1]: Failed to start Crash recovery kernel arming.

