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# Ubuntu设置强密码
https://help.ubuntu.com/community/StrongPasswords
# Linux端口被占用
参考[StackOverflow](https://stackoverflow.com/questions/20239232/error-that-port-is-already-in-use)
执行命令`sudo lsof -t -i tcp:<port_number>`查看被占用的端口号对应的进程id,然后kill相应进程,或者直接执行`sudo lsof -t -i tcp:<port_number> | xargs kill -9`或`sudo fuser -k <port_number>/tcp`kill占用端口的进程。
# 停用系统服务
```bash # 例如:sudo systemctl disable tomcat8 sudo systemctl disable <service_name> ```
# 触摸板双指操作在休眠后失效
编辑`/etc/default/grub`文件,添加`psmouse.synaptics_intertouch=0`到`GRUB_CMDLINE_LINUX_DEFAULT`的最后,例如:`GRUB_CMDLINE_LINUX_DEFAULT="quiet splash psmouse.synaptics_intertouch=0"`