*** System restart required ubuntu ***

Ubuntu 20.04 server登入後，出現提示訊息：

• 97 updates can be applied immediately.
• 15 of these updates are standard security updates.
• ......
• *** System restart required ***

出現上面的訊息，代表著更新的套件有些需要重新開機才能夠作用，這些套件列在/var/run/reboot-required.pkgs裡面。若僅要確認更新standard security updates套件後是否要重開機，那就用指令：

• grep --color -f <(apt-get -s dist-upgrade | grep "^Inst" | grep -i security | awk -F " " {'print $2'}) /var/run/reboot-required.pkgs 

要檢查安全更新套件的changelog變更日誌，用指令：

1. apt-get changelog libssl1.1
2. xargs apt-get changelog < /var/run/reboot-required.pkgs

第一個指令只有檢查單個套件的變更日誌，後面是檢查所有standard security updates套件的變更日誌。通通檢查完以後，用下面指令更新安全性套件：

• apt-get -s dist-upgrade | grep "^Inst" | grep -i security | awk -F " " {'print $2'} | sudo xargs apt-get --yes install

參考資料

• Handling System Restart Required on Ubuntu
• Ubuntu 20.04僅更新安全性套件

_EOF_

Aquatint of a landscape of a Sexy desktop wallpaper from inside of a Dagobah, at Sunset, Peaceful, Gadgetpunk, MOBA style, absurdres, highly detailed, art by Jonas De Ro, perfection, masterpiece

Steps: 20, Sampler: DPM++ 2M Karras, CFG scale: 7, Seed: 2532252986, Size: 512x256, Model hash: fc2511737a, Model: chilloutmix_NiPrunedFp32Fix, Version: v1.6.1

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