On Sat, 16 Jan 2021 12:24:48 +0000, Pancho wrote:

> I thought << was a way of redirecting stdin, not redirecting command
> line or program file.
>
'man bash' is your friend - look up 'here documents' in the bash manpage

> In fact I couldn't get the following to work at all:
>
> sudo journalctl -f | awk '{ print $0 }'
>

awk is expecting to be passed the awkscript in one of these ways:
1) awk -f sourcefile
2) awk -- 'program text'

and in (2) the '--' which marks the end of awk options, is mandatory
if you use this syntax.

> sudo journalctl -f | awk -- '{ print $0 }'

Since journalctl only reads the systemd journal, if you want to read  any
other journal, and /var/log/messages is the default for most non-system
programs you need to use tail, not journalctl, so write something like

sudo tail -f  /var/log/messages | awk -- '{ print $0 }'

which works here.


--
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Martin    | martin at
Gregorie  | gregorie dot org

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