reading errors from logs

[TFC]

Hi, I have many rrd files(about 3000) and some rrd files are unused or produces error. I need to clean my rra folder from error or unused files.
In my crontab:

*/5 * * * * root cd /usr/local/cactid/bin; ./cactid > /dev/null 2>&1

So, my output goes to waste. Then I change this:

*/5 * * * * root cd /usr/local/cactid/bin; ./cactid > /tmp/cactid.out 2>&1

Thus, I collect all cactid output. OKs and ERRORs. But there are so many lines and I can't select errors. Is there any way to collect only errors?
My another aim is tı collect error logs, such as, which rrd file is not working properly, which file is unused.Then HPOV collect these logs and produce alarms.

[bulek]

You can try this one:

*/5 * * * * root cd /usr/local/cactid/bin; ./cactid > /dev/null 2>/tmp/cactid.out

- Piotr

[maenu]

you can use grep to filter out what you're intrested in...

$ grep -i error /tmp/cactid.out

=> prints out all lines which contain the word "error"
(case-insensitive)

of course, you can put a grep directly into crontab... but I think it makes more sense if you grep through a "offline" cactid.out

$ man grep

regards, manuel

[TFC]

You can try this one:

*/5 * * * * root cd /usr/local/cactid/bin; ./cactid > /dev/null 2>/tmp/cactid.out

- Piotr

I did. But ı get this:

[root@cacti tmp]# more cactid.out
wc: /var/log/httpd/access_log: No such file or directory

what does it mean?

[bulek]

This means that wc utility which counts your lines in apache log file can't find a file named "/var/log/httpd/access_log". Hmm... maybe your file is named "access.log"? Anyway you need to change it in webhits.pl script in which the name is hardcoded.

- Piotr

[TFC]

This means that wc utility which counts your lines in apache log file can't find a file named "/var/log/httpd/access_log". Hmm... maybe your file is named "access.log"? Anyway you need to change it in webhits.pl script in which the name is hardcoded.

- Piotr

Thanks I change the script as /www/logs/access_log