Suspend Ubuntu Server via Terminal
Works, tested with Ubuntu server 12.10
Tag Archives: server
Automatic daily backups using rsync
I have updated my automatic backup system. The main difference from my previous post is that the backup server is now responsible for pulling the data from remote PCs
Fix: Network not available after hardware change
Symptoms: after changing hardware (motherboard, NIC, virtual machine setup etc.) network connections are no longer available. ifconfig does not list the connections, although the adapters are displayed by ifconfig -a. ifup eth0 returns “Ignoring unknown interface eth0=eth0.”
Enable anti-clickjacking X-Frame-Options header
The Nikto scanner came up with this minor ‘hole’: + The anti-clickjacking X-Frame-Options header is not present The rationale behind Anti-Clickjacking is described in http://tools.ietf.org/html/draft-ietf-websec-x-frame-options-00 and http://security.stackexchange.com/questions/13341/security-issues-using-iframes To enable the header in Apache: 1) enable mod-headers module, if not enabled yet. Command: 2) add line “Header always append X-Frame-Options SAMEORIGIN” to /etc/apache2/httpd.conf 3) restart Apache… Read More »
Self hosting: Testing web server security
Since I’m starting to host this blog myself, I need to test the security of my web server. My first search ended up with Nikto scanner tool (http://hackertarget.com/nikto-tutorial/). It is very easy to run and completes the scan in less than 10 minutes. The scan is by no means complete and more tools will be… Read More »
Self-hosting my blog
I’m starting to self-host my blog. That also means changing the blog engine from Serendipity to WordPress. I hope all will run smooth after the upgrade
Restoring ZFS drive
Today I ran through an exercise of restoring a ZFS pool. The beginning of one hard drive participating in the pool (no raidz) was incidentally overwritten.. by me. I’m glad I noticed the mixup and cancelled dd, but still 60MB was gone. I spent a few evenings analysing and fixing the MBR, partition table and… Read More »
How to increase VirtualBox disk size for a Linux virtual machine
VirtualBox does not support resizing its virtual storage devices. As a workaround, a new bigger VDI is created and the existing partition(s) are moved to the larger drive. This tutorial gives instructions on how to expand storage for Ubuntu Linux guest machine.