Filtering log output using the CLI

Use the commands in this section to use regular expressions to filter the log display to include only Network Security HA-specific information.

To filter the active log:

Log in to the Central Management System CLI.
Enable the CLI enable mode:
```
hostname > enable
hostname #
```
To display only the lines that match a regular expression:
```
hostname # show log matching <regularExpression>
```
To display only the lines that do not match a regular expression:
```
hostname # show log not matching <regularExpression>
```

To filter an archived log:

Enable the CLI enable mode:
```
hostname > enable
hostname #
```
List the logs:
```
hostname # show log files
```
To display only the lines in an archived log that match a regular expression:
```
hostname # show log files <number> matching <regularExpression>
```
To display only the lines in an archived log that do not match a regular expression:
```
hostname # show log files <number> not matching <regularExpression>
```

To filter the newly added lines that are printed in real time:

Enable the CLI enable mode:
```
hostname > enable
hostname #
```
To start printing only the new lines in the active log that match a regular expression:
```
hostname # show log continuous matching <regularExpression>
```
To start printing only the new lines in the active log that do not match a regular expression
```
hostname # show log continuous not matching <regularExpression>
```

To filter all logs:

Enable the CLI enable mode:
```
hostname > enable
hostname #
```
To view only the lines in all logs that match a regular expression:
```
hostname # show log files all matching <regularExpression>
```
To view only the lines in all logs that do not match a regular expression:
```
hostname # show log files all not matching <regularExpression>
```