【Plesk经验分享】无法升级Plesk？怎么办？

适用版本：
Plesk for Linux

问题描述
无法更新Plesk。在过程中出现下面的错误：
Preparing to unpack .../linux-headers-4.4.0-116_4.4.0-116.140_all.deb ...
Unpacking linux-headers-4.4.0-116 (4.4.0-116.140) ...
dpkg: error processing archive /var/cache/apt/archives/linux-headers-4.4.0-116_4.4.0-116.140_all.deb (--unpack):
unable to create '/usr/src/linux-headers-4.4.0-116/drivers/net/arcnet/Makefile.dpkg-new' (while processing './usr/src/linux-headers-4.4.0-116/drivers/net/arcnet/Makefile'): No space left on device
dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
Preparing to unpack .../linux-headers-4.4.0-116-generic_4.4.0-116.140_amd64.deb ...
Unpacking linux-headers-4.4.0-116-generic (4.4.0-116.140) ...
dpkg: error processing archive /var/cache/apt/archives/linux-headers-4.4.0-116-generic_4.4.0-116.140_amd64.deb (--unpack):
unable to create '/usr/src/linux-headers-4.4.0-116-generic/include/config/ncpfs/ioctl/locking.h.dpkg-new' (while processing './usr/src/linux-headers-4.4.0-116-generic/include/config/ncpfs/ioctl/locking.h'): No space left on device
dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
Errors were encountered while processing:
/var/cache/apt/archives/linux-headers-4.4.0-116_4.4.0-116.140_all.deb
/var/cache/apt/archives/linux-headers-4.4.0-116-generic_4.4.0-116.140_amd64.deb
  
原因
在挂载 /usr 的分区上使用了索引节点。

解决方案
1. 通过SSH连接服务器

2. 检查所有的内核是否正确安装：
# dpkg -l | tail -n +6 | grep -E 'linux-image-[0-9]+' | grep -Fv $(uname -r)

ii linux-image-4.4.0-92-generic
<..>
ii linux-image-4.4.0-96-generic
<..>
ii linux-image-4.4.0-108-generic
iU linux-image-4.4.0-112-generic
ii linux-image-4.4.0-114-generic
iU linux-image-4.4.0-116-generic

3. 如果显示 iU 超过一次，以上面显示的 4.4.0-112 为例，说明该内核安装不正确。请将其移除。请不用担心，此操作是安全的，因为上述命令不会显示当前使用的内核：
# dpkg --remove linux-headers-4.4.0-112 linux-image-4.4.0-112-generic linux-image-extra-4.4.0-112-generic

注意：将版本替换为服务器上实际显示的版本。

4. 移动服务器上安装的最旧的内核文件，例如：
# mv /usr/src/linux-headers-4.4.0-92* /root/

5. 修复剩下的：
# apt-get install -f -y

6. 移除不必要的包，包括旧的内核：
# apt autoremove -y

7. 安装Plesk更新：
# plesk installer --select-release-current --reinstall-patch --upgrade-installed-components

8. 升级系统包（非必需，但推荐）：
# apt-get upgrade -y