SYNOPSIS
sdjournal [ --help ] [ --version ] [ --extcap-interfaces ] [ --extcap-dlts ] [ --extcap-interface=<interface> ] [ --extcap-config ] [ --capture ] [ --fifo=<path to file or pipe> ] [ --start-from=<entry count> ]
DESCRIPTION
sdjournal is an extcap tool that allows one to capture systemd journal entries. It can be used to correlate system events with network traffic.
Supported interfaces:
- 
sdjournal 
OPTIONS
- --help
- 
Print program arguments. 
- --version
- 
Print program version. 
- --extcap-interfaces
- 
List available interfaces. 
- --extcap-interface=<interface>
- 
Use specified interfaces. 
- --extcap-dlts
- 
List DLTs of specified interface. 
- --extcap-config
- 
List configuration options of specified interface. 
- --capture
- 
Start capturing from specified interface and write raw packet data to the location specified by --fifo. 
- --fifo=<path to file or pipe>
- 
Save captured packet to file or send it through pipe. 
- --start-from=<entry count>
- 
Start from the last <entry count> entries, similar to the "-n" or "--lines" argument for the tail(1) command. Values prefixed with a + sign start from the beginning of the journal, otherwise the count starts from the end. The default value is 10. To include all entries use +0. 
EXAMPLES
To see program arguments:
sdjournal --help
To see program version:
sdjournal --version
To see interfaces:
sdjournal --extcap-interfaces
Only one interface (sdjournal) is supported.
interface {value=sdjournal}{display=systemd journal capture}
To see interface DLTs:
sdjournal --extcap-interface=sdjournal --extcap-dlts
dlt {number=147}{name=sdjournal}{display=USER0}
To see interface configuration options:
sdjournal --extcap-interface=sdjournal --extcap-config
arg {number=0}{call=--start-from}{display=Starting position}{type=string}
    {tooltip=The journal starting position. Values with a leading "+" start from the beginning, similar to the "tail" command}
To capture:
sdjournal --extcap-interface=sdjournal --fifo=/tmp/sdjournal.pcap --capture
To capture all entries since the system was booted:
sdjournal --extcap-interface=sdjournal --fifo=/tmp/sdjournal.pcap --capture --start-from +0
| Note | To stop capturing CTRL+C/kill/terminate the application. | 
NOTES
sdjournal is part of the Wireshark distribution. The latest version of Wireshark can be found at https://www.wireshark.org.
HTML versions of the Wireshark project man pages are available at https://www.wireshark.org/docs/man-pages.
AUTHORS
Gerald Combs <gerald[AT]wireshark.org>