Linux, programming and more
Monitoring is great! I try to monitor everything I can – each service and important cron-jobs.
Since I’m running on nginx I searched a lot around the web for munin plugins, maybe yo know this problem you found one but you get empty graph.
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Bad situation if you have too much ACLs in your squid config and important site gets a DENIE cause one or more of this all ACL’s matches.
Debugging helps you to find the right ACL.
1 2 3 | vim /etc/squid3/squid.conf # Debugging for your ACLs debug_options 28,9 |
Your debugged results will appear in your cache.log
1 | less /var/log/squid3/cache.log |
I am still searching for a perfect progress bar for DD, I know a dirty trick[*1] – put DD to background an sending “USR1” signal to bring it to show a progress – I hate this solution!
This one is not so dirty, but you have only the done progress and transfer speed.
1 2 | dd if=/opt/wap/Backup.tib | pv | ssh -c arcfour id@tower "dd of=/home/id/Backup.tib" 1.94GB 0:01:15 [30.1MB/s] [<=> |
Dirty trick:
Only local way!
1 2 | dd if=/opt/wap/Backup.tib of=file.img bs=4KB& pid=$! while true; do kill -USR1 $pid && sleep 1 && clear; done |
Yeah after installation of Windows seven – my Grub-Bootloader was removed and I get only the Windows bootmager.
This article describe hot to mount root “/” which was created on LVM from a live CD and install GRUB Boot-Loader.
Step 1: Get a live CD in my case it was Ubuntu 10.10 Desktop edition.
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You have a IP-Address from a PC, and you want to know which web-sites ware visited from this PC.
Grep for PCs IP-Address in the access log of your proxy box.
As result you will get a list with visited sites.
1 | grep 172.16.0.5 /var/log/squid3/access.log | cut -d" " -f7 | sort -u | less |