Bashscripts.org

I probably am making this harder than it actually is but I have a server for whatever reason tends to drop networking. I cannot determine when it happens but it has happened twice now and I can get everything back online by running service network restart. This is a Novell SLES 10 server and I am looking for a script to place in a cron job that will check and start networking if it has gone astray. Any advice or assistance? I just ran into the site which is bookmarked and I plan to learn quite a bit from everyone. Thanks!

for testing connectivity, you can try to ping a stable site. eg:

Very nice. I am new to the bash scripting world and would never have thought I could do what I need in just there lines, very minimal. I have a lot of work to do in order to become more proficient with bash scripting. Thanks again. I am back off to browse these boards for very useful and meaningful information.

Any recommendations of books or training?

Thanks again.

I always recommend these to people new to bash:

http://linuxcommand.org/learning_the_shell.php
http://tldp.org/LDP/abs/html/


There is some overlap, but both are great resources.

Something like:
?

Not bad. You can use "while true" though to make it a bit nicer-looking

Just for a little variety (we need more posters!!!) what about fping? it's available in the Debian and OpenSuse repository, but I'm not sure about SuSE Enterprise...:



If the ping is successful, it returns zero, but if not, it returns 1 and restarts networking.

What advantage in this case does i have over normal ping? That also returns based on the result iirc.

True, ping does also give you a return code! But even with '-q' regular ping still prints the end results to the screen. If you wanted it to be truly silent, you'd have to redirect the output to /dev/null. With fping, the '-q' option means no output at all, just a return code which is all our 'if' statement needs. So to do the same thing with ping, you'd do something like this:



That way you just get the return code. I just think fping is a little cleaner. on my screen, the fping command is like, a whole inch shorter! I use it a lot because I miss the old Unix ping that would just say "google.com is alive" instead of giving you the full ping results