如何清理aws ec2服务器？

Question

I recently ran a report on my EC2 server and was told that it ran out of space. I deleted the csv that was partially generated from my report (it was going to be a pretty sizable one) and ran df -h and was surprised to get this output:

Filesystem      Size  Used Avail Use% Mounted on
/dev/xvda1      7.8G  7.0G  718M  91% /
devtmpfs         15G  100K   15G   1% /dev
tmpfs            15G     0   15G   0% /dev/shm 

I surprised not only by how little was available/how much space was used,(I am on the /dev/xvda1 instance) but also surprised to see 2 alternative filesystems.

To investigate what was taking so much space, I ran du -h in ~ and saw the list of all directories on the server. Their reported size in aggregate should not be even close to 7 gb...which is why I ask "what is taking up all that space??"

The biggest directory by far was the ~ directory containing 165MB all other were 30MB and below. My mental math added it up to WAY less than 7gb. (if I understand du -h correctly, all directories within ~ ought to be included within 165MB...so I am very confused how 7 gb could be full)

Anyone know what's going on here, or how I can clean up the space? Also, just out of curiosity, is there a way to utilize the devtmpfs/tmpfs servers from the same box? I am running on AWS Linux, with versions of python and ruby installed

Answer 1

根据这个答案，这似乎可能是因为日志文件变得太大。尝试运行他们的答案中提到的命令OP，以找到所有大文件：sudo find / -type f -size +10M -exec ls -lh {} \;

Answer 2

对我来说，最好的选择是删除overlay2docker 文件夹并将 docker 完全刷新到干净的状态。就我而言，它清理了超过 3GB 的空间。

重要提示：它将停止并删除您的实例，因此您需要重建它们。

为此，首先停止 docker 引擎

sudo systemctl stop docker

修剪然后删除整个docker目录（不仅仅是overlay2文件夹）：

docker system prune
sudo rm -rf /var/lib/docker

重新启动码头工人：

sudo systemctl start docker

引擎将在没有任何映像、容器、卷、用户创建的网络或集群状态的情况下重新启动。

另外，您可以snap使用以下方法删除：

sudo apt autoremove --purge snapd