Using date as part of logfile name
 

I would like to write a shell script but am quite new to it. Not sure how to start.

Using the shell script, I hope to run tcpdump and save / log tcpdump's output into a file that the current date is included in the file name.

Eg today is 060504. When I run tcpdump via the shell script, I would like it to direct its output to a file say tcpdumplog060504 - something like that. Then say for the next day, if I run it again, it will log to tcpdumplog070504. So on and so forth.

How can I do this? Hope someone can help me out and provide some guidance.

I am planning to use cron to run the shell script.

Thanks a million.
James

Redirect it to something like "tcpdumplog`date +%d%m%y`"

I'd suggest yyyy-mm-dd-tcpdump to have a logical
order by timestamps ;)

using yyyy-mm-dd-tcpdump ?
 

Thanks for the help. Really appreciate it.

Tinkster, how can I code using yyyy-mm-dd-tcpdump?
I am new at this so hope you can provide an example.

Thanks again.
James

Almost the same as demonane's...

tcpdump -options > "/var/log/`date +%Y%m%d`-tcpdumplog"



Cheers,
Tink

Log to text file
 

I would like the log files to have the txt extension so I can view it.

How would I go about this?

Thanks
James

Cheers,
Tink

Thanks
 

THanks for all the help.

Appreciate it.
James