xubuntu 18.04 登录循环

You have a full root partition /dev/sda6 (Unavailable 0, Used% 100%).

1. Try free some space

   • Reboot to recovery mode, select clean from the menu.
   • Or quick try delete packages archive, sudo rm /var/cache/apt/archives/*.deb, check df again.

   • If still didn't get free space, look for large files using find command. Example:

     sudo find / -size "+200M"
     

     "+200M" means larger than 200 MiB

     And delete what seems not important or could be restored later.

2. Reboot

Note: about the root partition size, based on personal experience.

• 14GB seems small but it is okey for someone using machine only for Internet communications and Office things. Going beyond that probably you going to need more. My usual minimum is 20~25GB. If I'm expecting to install an engineering (1~12GB at least for electronics) or game software which nowadays raised the bar (some even passed 25GB), I go higher 30~65GB (40~10% of HDD capacity).

• 建议不要忽略空间不足的警告消息。大多数应用程序不够健壮，无法处理“没有剩余空间”，那么您可能会面临有时难以解决的副作用问题，例如文件损坏、安装不完整……在您看来，这可能只是应用程序无法加载，登录循环或奇怪的行为，因为底层服务无法启动...