Ubuntu 18 开机启动慢

1、通过指令分析

# sudo systemd-analyze blame
         39.607s mysql.service
         25.194s systemd-journal-flush.service
         23.985s dev-sda1.device
         19.144s apparmor.service
         16.256s dev-loop35.device
         16.130s dev-loop39.device
         16.116s dev-loop38.device
         16.044s dev-loop36.device
         15.764s dev-loop40.device
         15.441s dev-loop34.device
         15.409s dev-loop33.device
         15.320s snapd.service
         15.295s dev-loop37.device
         15.249s dev-loop23.device
         15.246s dev-loop31.device
         15.213s dev-loop32.device
         14.647s dev-loop30.device
         14.635s dev-loop21.device
         14.553s dev-loop24.device
         14.487s dev-loop17.device
         14.346s dev-loop22.device
         14.169s dev-loop25.device
         13.905s dev-loop29.device

2、关闭不需要的服务

#sudo sysv-rc-conf