Archive for April, 2009

Bash: Input from multiple files.

exec 3<$1 4<$2 while read file1 <&3 && read file2 <&4 do code

Rsyslog: remote logging

On the client you want to log from:
vi /etc/rsyslog.conf

*.* @RemoteSyslogIPAddress:Port

*.* @

On the remote logging server:
vi /etc/rsyslog.conf

# Begin – Allow remote logging
$UDPServerRun 514
# End – Allow remote logging

Need to send a HUP to the rsyslogd process or

service rsyslog reload

Protected: MacOSX: Connecting to a Cisco router/switch.

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Usefull lsof options

Various useful lsof options:

To view files open by a particular PID:
lsof -p pidnumber

To show processes and the port they are running on. This is a great command to find out not only process and port, but also the command and the PID.:
lsof -i -nP # The -n does not resolve the IP addresses and ports to names.


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