1、ssh root@47.114.184.XXX 会提示输入密码，就行了。不像windows还要下载软件。
2、查看硬盘剩余空间 df -hl
(base) qqhfeng@qqhfeng-HP-Notebook:~$ df -hl
文件系统 容量 已用 可用 已用% 挂载点
udev 3.9G 0 3.9G 0% /dev
tmpfs 787M 1.9M 785M 1% /run
/dev/sda2 228G 28G 189G 13% /
tmpfs 3.9G 41M 3.8G 2% /dev/shm
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/loop1 15M 15M 0 100% /snap/gnome-characters/399
/dev/loop2 157M 157M 0 100% /snap/gnome-3-28-1804/110
/dev/sda1 511M 6.1M 505M 2% /boot/efi
/dev/loop4 15M 15M 0 100% /snap/gnome-logs/45
/dev/loop5 15M 15M 0 100% /snap/gnome-characters/375
/dev/loop0 92M 92M 0 100% /snap/core/8689
/dev/loop6 1.0M 1.0M 0 100% /snap/gnome-logs/81
/dev/loop3 161M 161M 0 100% /snap/gnome-3-28-1804/116
/dev/loop8 55M 55M 0 100% /snap/core18/1650
/dev/loop7 45M 45M 0 100% /snap/gtk-common-themes/1353
/dev/loop9 55M 55M 0 100% /snap/core18/1668
/dev/loop10 90M 90M 0 100% /snap/core/8268
/dev/loop11 3.8M 3.8M 0 100% /snap/gnome-system-monitor/123
/dev/loop12 3.8M 3.8M 0 100% /snap/gnome-system-monitor/127
/dev/loop14 4.3M 4.3M 0 100% /snap/gnome-calculator/544
/dev/loop13 141M 141M 0 100% /snap/gnome-3-26-1604/74
/dev/loop15 2.3M 2.3M 0 100% /snap/gnome-calculator/260
/dev/loop17 45M 45M 0 100% /snap/gtk-common-themes/1440
/dev/loop16 141M 141M 0 100% /snap/gnome-3-26-1604/98
tmpfs 787M 16K 787M 1% /run/user/121
tmpfs 787M 44K 787M 1% /run/user/1000