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Full Discussion: How to redirect the messages from the script to console in Linux?
Top Forums Shell Programming and Scripting How to redirect the messages from the script to console in Linux? Post 302924731 by sea on Wednesday 12th of November 2014 05:32:39 AM
Old 11-12-2014
You are already doing 'send the msg on console/terminal'.
In which case, you could execute this 'msg.sh' script at login.
For a bash based linux, this could be in: $HOME/.bashrc (note the . before the name)

Or do you ment to write to the logs?
Which in case of a regular service should already be done - see journalctl (1) for more details.

Otherwise you could always redirect your output to a file, which you can read at any time later.
To overwrite existing content:
Code:
echo "Service started" > /path/to/output_file

To append:
Code:
echo "Service failed" >> /path/to/output_file

Hope this helps
 

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LEARN ABOUT CENTOS

systemd-journal-gatewayd.service

SYSTEMD-JOURNAL-GATEWAYD.SERVICE(8)			 systemd-journal-gatewayd.service		       SYSTEMD-JOURNAL-GATEWAYD.SERVICE(8)

NAME

       systemd-journal-gatewayd.service, systemd-journal-gatewayd.socket, systemd-journal-gatewayd - HTTP server for journal events

SYNOPSIS

       systemd-journal-gatewayd.service

       systemd-journal-gatewayd.socket

       /usr/lib/systemd/systemd-journal-gatewayd [OPTIONS...]

DESCRIPTION

       systemd-journal-gatewayd serves journal events over the network. Clients must connect using HTTP. The server listens on port 19531 by
       default. If --cert= is specified, the server expects HTTPS connections.

       The program is started by systemd(1) and expects to receive a single socket. Use systemctl start systemd-journal-gatewayd.socket to start
       the service, and systemctl enable systemd-journal-gatewayd.socket to have it started on boot.

OPTIONS

       The following options are understood:

       --help, -h
	   Prints a short help text and exits.

       --version
	   Prints a short version string and exits.

       --cert=
	   Specify the path to a file containing a server certificate in PEM format. This option switches systemd-journal-gatewayd into HTTPS mode
	   and must be used together with --key=.

       --key=
	   Specify the path to a file containing a server key in PEM format corresponding to the certificate specified with --cert=.

SUPPORTED URLS

       The following URLs are recognized:

       /browse
	   Interactive browsing.

       /entries[?option1&option2=value...]
	   Retrieval of events in various formats.

	   The Accept: part of the HTTP header determines the format. Supported values are described below.

	   The Range: part of the HTTP header determines the range of events returned. Supported values are described below.

	   GET parameters can be used to modify what events are returned. Supported parameters are described below.

       /machine
	   Return a JSON structure describing the machine.

	   Example:

	       { "machine_id" : "8cf7ed9d451ea194b77a9f118f3dc446",
		 "boot_id" : "3d3c9efaf556496a9b04259ee35df7f7",
		 "hostname" : "fedora",
		 "os_pretty_name" : "Fedora 19 (Rawhide)",
		 "virtualization" : "kvm",
		 ...}

       /fields/FIELD_NAME
	   Return a list of values of this field present in the logs.

ACCEPT HEADER

       Accept: format

       Recognized formats:

       text/plain
	   The default. Plaintext syslog-like output, one line per journal entry (like journalctl --output short).

       application/json
	   Entries are formatted as JSON data structures, one per line (like journalctl --output json). See Journal JSON Format[1] for more
	   information.

       application/event-stream
	   Entries are formatted as JSON data structures, wrapped in a format suitable for Server-Sent Events[2] (like journalctl --output
	   json-sse).

       application/vnd.fdo.journal
	   Entries are serialized into a binary (but mostly text-based) stream suitable for backups and network transfer (like journalctl --output
	   export). See Journal Export Format[3] for more information.

RANGE HEADER

       Range: entries=cursor[[:num_skip]:num_entries]

       where cursor is a cursor string, num_skip is an integer, num_entries is an unsigned integer.

       Range defaults to all available events.

URL GET PARAMETERS

       Following parameters can be used as part of the URL:

       follow
	   wait for new events (like journalctl --follow, except that the number of events returned is not limited).

       discrete
	   Test that the specified cursor refers to an entry in the journal. Returns just this entry.

       boot
	   Limit events to the current boot of the system (like journalctl --this--boot).

       KEY=match
	   Match journal fields. See systemd.journal-fields(7).

EXAMPLES

       Retrieve events from this boot from local journal in Journal Export Format[3]:

	   curl --silent -H'Accept: application/vnd.fdo.journal' 
		  'http://localhost:19531/entries?boot'

       Listen for core dumps:

	   curl 'http://localhost:19531/entries?follow&MESSAGE_ID=fc2e22bc6ee647b6b90729ab34a250b1'

SEE ALSO

       systemd(1), journalctl(1), systemd-journald.service(8), systemd.journal-fields(7),

NOTES

	1. Journal JSON Format
	   http://www.freedesktop.org/wiki/Software/systemd/json

	2. Server-Sent Events
	   https://developer.mozilla.org/en-US/docs/Server-sent_events/Using_server-sent_events

	3. Journal Export Format
	   http://www.freedesktop.org/wiki/Software/systemd/export

systemd 208												       SYSTEMD-JOURNAL-GATEWAYD.SERVICE(8)
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