Ubuntu Server 优化

一·开机优化

1.查询开启启动服务耗时

sudo systemd-analyze blame

例如我执行后的结果:

$ sudo systemd-analyze blame
1min 22.897s sendmail.service                                                         
     24.741s systemd-tmpfiles-clean.service                                           
      9.489s proc-sys-fs-binfmt_misc.mount                                            
      8.186s rsyslog.service                                                          
      8.073s systemd-networkd-wait-online.service                                     
      3.484s NetworkManager-wait-online.service                                       
      3.164s udisks2.service                                                          
      2.522s dev-sda2.device                                                          
      2.293s systemd-udev-settle.service                                              
      2.123s cloud-config.service                                                     
      2.041s snap.lxd.activate.service                                                
      1.936s systemd-journal-flush.service                                            
      1.894s cloud-init-local.service                                                 
      1.880s cloud-init.service                                                       
      1.785s bt.service                                                               
      1.592s cloud-final.service                                                      
      1.372s snapd.service                                                            
      1.267s nginx.service                                                            
       928ms accounts-daemon.service                                                  
       819ms networkd-dispatcher.service                                              
       753ms user@1000.service             

2.根据结果找出需要优化的内容，搜索优化方法

根据上面的结果，需要优化的服务： sendmail.service systemd-tmpfiles-clean.service