systemd speed up boot time

https://www.cnblogs.com/morgan363/p/13957565.html

https://blog.csdn.net/easylife206/article/details/103790052

 

edit /etc/systemd/journald.conf

 

To Reduce the size
SystemMaxUse=80M # I've dropped this considerably from the default
RuntimeMaxUse=75M # ditto

These are to lower the verbosity of logs.
MaxLevelStore=warning
MaxLevelSyslog=warning
MaxLevelKMsg=warning
MaxLevelConsole=notice
MaxLevelWall=crit

The argument after the = takes one of
"emerg", "alert", "crit", "err", "warning", "notice", "info", "debug",