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This is the check_log Nagios plugin, available e.g. in /usr/lib/nagios/plugins/.

File write

This executable can write data to local files.

Unprivileged
This function can be performed by any unprivileged user.
```
check_log -F /path/to/input-file -O /path/to/output-file
```
Sudo
This function is performed by the privileged user if executed via sudo because the acquired privileges are not dropped.

Remarks
If there are environment variables involved, they must be passed via sudo VAR=value ... or exported then sudo -E ....
```
check_log -F /path/to/input-file -O /path/to/output-file
```

File read

This executable can read data from local files.

Unprivileged
This function can be performed by any unprivileged user.
```
check_log -F /path/to/input-file -O /dev/stdout
```
Sudo
This function is performed by the privileged user if executed via sudo because the acquired privileges are not dropped.

Remarks
If there are environment variables involved, they must be passed via sudo VAR=value ... or exported then sudo -E ....
```
check_log -F /path/to/input-file -O /dev/stdout
```

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