Improve README; check-file-age
Monitor file age and size for script monitoring.
-## Usage
+## Synopsis
+```
+check-file-age -w 240 -W 10 -c 600 -C 0 -f /path/to/filename
+```
+
+## Installation
+
+First, build this program.
+
+```
+go get github.com/mackerelio/go-check-plugins
+cd $(go env GOPATH)/src/github.com/mackerelio/go-check-plugins/check-file-age
+go install
+```
+
+Or you can use this program by installing the official Mackerel package. See [Using the official check plugin pack for check monitoring - Mackerel Docs](https://mackerel.io/docs/entry/howto/mackerel-check-plugins).
+
+
+Next, you can execute this program :-)
+
+```
+check-file-age -w 240 -W 10 -c 600 -C 0 -f /path/to/filename
+```
+
+
+## Setting for mackerel-agent
+
+If there are no problems in the execution result, add s setting in mackerel-agent.conf .
```
-$ check-file-age -w 240 -W 10 -c 600 -C 0 -f filename
+[plugin.checks.fileage-sample]
+command = ["check-file-age", "-w", "240", "-W", "10", "-c", "600", "-C", "0", "-f", "/path/to/filename"]
```
-## Setting
+## Usage
+### Options
```
-[plugin.checks.fileage]
-command = "/path/to/check-file-age -f filename"
+ -f, --file= monitor file name
+ -w, --warning-age= warning if more old than (default: 240)
+ -W, --warning-size= warning if file size less than
+ -c, --critical-age= critical if more old than (default: 600)
+ -C, --critical-size= critical if file size less than (default: 0)
+ -i, --ignore-missing skip alert if file doesn't exist
```
+## For more information
+
+Please execute `check-file-age -h` and you can get command line options.
+
## Other
-* inspired by [check_file_age.pl](https://github.com/nagios-plugins/nagios-plugins/blob/master/plugins-scripts/check_file_age.pl)
+- inspired by [check_file_age.pl](https://github.com/nagios-plugins/nagios-plugins/blob/master/plugins-scripts/check_file_age.pl)
