====== Syslog ======
  * Syslog Facilities

^  **Severity Level**  ^  **Keyword**  ^ **Description** ^
|  0  |  emergencies  | System unusable |
|  1  |  alerts  | Immediate action required |
|  2  |  critical  | Critical condition |
|  3  |  errors  | Error conditions |
|  4  |  warnings  | Warning conditions |
|  5  |  notifications  | Normal but significant conditions |
|  6  |  informational  | Informational messages |
|  7  |  debugging  | Debugging messages |

===== Configuration (Ubuntu/Debian) =====
  * Modify config file /etc/syslog.conf

==== Remote Syslog ====
  * By default syslog doesn't expect to receive messages from remote clients. Here's how to configure your Linux server to start listening for these messages.
  * Edit /etc/default/syslogd directly and make the SYSLOGD variable definition become "-r".
  * Restart syslog server
<code>
# Options for start/restart the daemons
# For remote UDP logging use SYSLOGD="-r"
#
#SYSLOGD="-u syslog"
SYSLOGD="-r"
</code> 

==== Restart Syslog ====
  * Restart syslog server (Ubuntu/Debian)
<code>
sudo /etc/init.d/sysklogd restart
</code>

===== Configuration (Redhat) =====
  * Modify config file /etc/syslog.conf

==== Remote Syslog ====
  * By default syslog doesn't expect to receive messages from remote clients. Here's how to configure your Linux server to start listening for these messages.
  * On Redhat, Syslog will not listen for remote messages unless the SYSLOGD_OPTIONS variable in this file has a -r included in it as shown below.
  * Restart syslog server
<code>
# Options to syslogd
# -m 0 disables ’MARK’ messages.
# -r enables logging from remote machines
# -x disables DNS lookups on messages received with -r
# See syslogd(8) for more details

SYSLOGD_OPTIONS="-m 0 -r"

# Options to klogd
# -2 prints all kernel oops messages twice; once for klogd to decode, and
# once for processing with ’ksymoops’
# -x disables all klogd processing of oops messages entirely
# See klogd(8) for more details

KLOGD_OPTIONS="-2"
</code>

==== Restart Syslog ====
  * Restart syslog server (Redhat)
<code>
service syslog restart
</code>