how to umount storage with busy, linux

 https://linuxhandbook.com/umount-target-busy/

firefox add-on

 1. https://support.mozilla.org/en-US/kb/unable-install-add-ons-extensions-or-themes

2. use live host

LiveHosts

zabbix macro and his function

all view 

https://www.zabbix.com/documentation/current/en/manual/config/macros

# macro

https://www.zabbix.com/documentation/current/en/manual/config/macros 

# macro with function

https://www.zabbix.com/documentation/current/en/manual/config/macros/macro_functions

python 2.7 post handler

 https://www.cnblogs.com/gattaca/p/7301282.html

fluentd log-driver

 https://blog.boatswain.io/zh/post/docker-container-log-rotation/

https://gdevillele.github.io/engine/admin/logging/fluentd/

https://hub.docker.com/r/fluent/fluent-bit/

zabbix storage

 

查看磁盘容量息的key值：vfs.fs.size[/,pfree]

vfs.fs.size[/,pfree]：取/领域的剩余空间率。p是percentage，

vfs.fs.size[/,free]：取/领域的剩余空间。对应的单位就是B（这里的意思是Byte）

vfs.fs.size[/,pused]：取/领域的使用空间率。

vfs.fs.size[/,used]：取/领域的使用空间。

如果要创建触发器表达式可以使用{ZABBIX-CC:vfs.fs.size[/,pfree].last(0)}<20

參考 https://blog.51cto.com/ityunwei2017/1864128

CRONTAB file

 in /var/spool/cron