感觉是阿里云超卖我小鸡的硬盘了，df 看到我还剩下 21G 硬盘，但是 php 写文件老是报错硬盘容量不足，然后我执行 dd if=/dev/zero of=./swapfile bs=1M count=20480 后再把这个 swapfile 删掉后就不报容量不足错了，应该和虚拟机一样扩硬盘容量容易，删硬盘空间难吧，建议小鸡用户都没事跑些 dd 命令吧。
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Supplement 1 · Dec 6, 2018
不是硬盘容量问题（ cannot create temp file for here-document: No space left on device ），导致的，而是 inode 不够的原因，
In most cases (obviously not in your case) the reason will be that you are running out of iNodes.
To check this run df -i:
Filesystem Inodes IUsed IFree IUse% Mounted on
[...]
25600 25600 0 100% /foo
Here you can see the use of iNodes is 100%.
Bad news is, according to https://superuser.com/questions/585641/changing-max-inode-count-number-in-ext3-filesystem-in-cent-os you need to re-create your file system with the -i option in order to increase the number of inodes.
In most cases (obviously not in your case) the reason will be that you are running out of iNodes.
To check this run df -i:
Filesystem Inodes IUsed IFree IUse% Mounted on
[...]
25600 25600 0 100% /foo
Here you can see the use of iNodes is 100%.
Bad news is, according to https://superuser.com/questions/585641/changing-max-inode-count-number-in-ext3-filesystem-in-cent-os you need to re-create your file system with the -i option in order to increase the number of inodes.
Supplement 2 · Dec 6, 2018
使用 du /|sort -k1 -n 命令找到垃圾文件最多的那个目录，然后删除那个目录就行了
Supplement 3 · Dec 6, 2018
vim /etc/systemd/journald.conf
```
MaxRetentionSec=1month
MaxFileSec=1month
```
systemctl restart systemd-journald
```
MaxRetentionSec=1month
MaxFileSec=1month
```
systemctl restart systemd-journald
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www5070504 Dec 6, 2018
超配么
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2
zjsxwc OP 结贴，不是阿里云问题，是我自己的问题，在 append 里已经说明原因。
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