Background: I made a tar backup of one system and wanted to untar that onto different hardware. A bit like cloning. However I needed to make sure the hostname and network settings were those of the new machine and not the cloned machine. So for future... » More
The simple way to wipe or zerofill a disk is: dd if=/dev/zero of=/dev/sd? bs=1M However I found an article describing how to zero-fill with a progress indicator using pipebench, installed on Debian/Ubuntu with: sudo apt-get install pipebench then... » More
Background: I had an existing CentOS machine as a virtual machine running on VMWare ESX Server and it was running out of space so for future reference I did the following. Incidentally my disk is sda with the new partition create on the extra space as... » More
Quick Reference Good PDF introduction to the GDL language. Libraries Hunting around the web there are people producing extra libraries which can be downloaded : NASA IDL Astronomy Libraries SDSSIDL - a set of general IDL utilities for... » More
The Gnu Data Language is an interactive interpreter/incremental compiler for the GNU Data Language, which is primarily used in scientific, astronomical, medical and geo-science data processing applications. It supports graphical output and is... » More
So I tested out Skipfish today to do a quick check on a website / web server. Hosted on Google at: http://code.google.com/p/skipfish/ download it, extract it and make and run: wget http://skipfish.googlecode.com/files/skipfish-2.01b.tgz tar xzf... » More
Occasionally useful to find out the dimensions of an image without having to load an image editor or file manager. From the ImageMagick toolkit:identify myimage.jpgtiffinfo myimage.tifpnginfo myimage.png
So I had a problem with the ldapusersearch string as some eejit has created an OU with spaces and an apostrophe in the name. So the characters are represented as: comma %2c space %20 apostrophe %27 For example (entirely fictional... » More
WARNING: (B) '::/0' is a subnetwork of (A) '::/0' I had this warning when restarting squid 3. I had a line left over from squid 2: acl all src 0.0.0.0/0.0.0.0 which I had subsequently changed to acl all src all as I received a CIDR warning. So to... » More
Squid Get a few dependencies to get the ball rolling: yum -y groupinstall “Development Tools” yum -y install rpm-build openjade linuxdoc-tools openldap-devel pam-devel openssl-devel httpd rpm-devel expat-devel db4-devel libpcap-devel Browse... » More
Background: I had an existing CentOS machine as a virtual machine running on VMWare ESX Server and it was running out of space so for future reference I did the following. Incidentally my disk is sda with the new partition create on the extra space as... » More
