Category: Technology

Growing a qcow2 image file

First, convert it to raw: qemu-img convert system.qcow2 -O raw system.raw Read More »
By halfgaar, 2 years ago, on October 08, 2010, at 17:10 | 1 comment

Making mysqldump work on a zimbra installation

Zimbra installs its own mysql and there is no workable mysqldump command. There is a mysql command wrapper script (/opt/zimbra/bin/mysql) that loads an environment to set password and such, but there is no such thing for mysqldump. I copied that wrapper script to /usr/local/bin/mysqldump so that user zimbra can no run mysqldump. This is it: Read More »
By halfgaar, 2 years ago, on October 08, 2010, at 15:10 | No comments

Download flash without download manager

Dowloading flash normally requires installing a stupid Adobe download manager. Who needs a download manager for 2MB? Here is the direct link to the installer.

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By halfgaar, 2 years ago, on October 05, 2010, at 14:10 | 1 comment

Malware in PDFCreator

On one of our computers, some websites behaved very weird; pages could not be found and they were redirected to mybrowserbar.com. I found this on Wikipedia about PDFCreator: Read More »
By halfgaar, 2 years ago, on October 05, 2010, at 13:10 | No comments

Checking 3ware raid controllers over ssh with nagios

First check this to see how you enable a host to be checked with nagios over SSH. Read More »
By halfgaar, 2 years ago, on October 04, 2010, at 17:10 | No comments

Configuring nagios checks over SSH

I had to do a lot of fiddling before I got nagios over ssh working. I used this article as source, mostly, even though I did it differently. Read More »
By halfgaar, 2 years ago, on October 04, 2010, at 17:10 | No comments

Dropping all Linux disk cache

sync; echo 3 > /proc/sys/vm/drop_caches

source.

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By halfgaar, 2 years ago, on October 02, 2010, at 18:10 | No comments

Making apache log files world readable

Just chmod the dir, and to make sure rotated files are also readable, change /etc/logrotate.d/apache2. The mask is defined in there. Read More »
By halfgaar, 2 years ago, on October 01, 2010, at 14:10 | No comments

Show privileges for mysql users

(source) To show one users privilges in mysql: Read More »
By halfgaar, 2 years ago, on September 30, 2010, at 11:09 | No comments

Apache rewrite rule to rewrite to sub dir

One one particular site, I wanted to rewrite all requests to a sub dir. It took me over an hour, because of some obscure problem I haven't been able to identify. Read More »
By halfgaar, 2 years ago, on September 27, 2010, at 16:09 | No comments