apache2.service: Failed to set up mount namespacing: Permission denied

1.編輯  /etc/systemd/system/multi-user.target.wants/apache2.service
修改 PrivateTmp=true 為
PrivateTmp=false
NoNewPrivileges=yes

2.執行
systemctl daemon-reload

Linux 列出伺服器廠商、型號及 SN

dmidecode -s system-manufacturer
dmidecode -s system-product-name
dmidecode -s system-serial-number

ipmitool fru list

Raspberry pi Waveshare 3.5 RPi LCD XPT2046 A 設定

git clone https://github.com/waveshare/LCD-show.git
cd LCD-show/
sudo ./LCD35-show

編輯 /boot/config
dtoverlay=waveshare35a:rotate=270
hdmi_force_hotplug=1
#max_usb_current=1
hdmi_group=0
hdmi_mode=1
hdmi_mode=87
hdmi_cvt 640 480 60 6 0 0 0
hdmi_drive=2
#display_rotate=1
#lcd_rotate=2

參考資料
https://t.codebug.vip/questions-171571.htm
https://www.raspberrypi.org/documentation/configuration/config-txt/video.md

Raspberry pi 3 Under-voltage detected! (0x00050005)

編輯 /boot/config.txt 加入

# Disable under-voltage warning
avoid_warnings=1

Linux CPU NUMA 資訊

numactl --hardware
lscpu
cat /sys/devices/system/node/online