My Nokia N900 has the US keyboard with four arrow keys but no diacritics, two of which are used in my native Finnish language. I actually like having the four arrow keys instead of two arrow keys plus dedicated diacritics. You can anyway get those from the on-screen keyboard, but it is better to remap some of the hardware keys to be able to punch them in quicker. Here’s how.
Here are instructions on how to get the pware Samba running on AIX 5.3.
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Here are simple instructions on how to configure network interface bonding on Red Hat based distros. The thing I always forget. There’s also a little script which will create a bonding interface bond0 between eth0 and eth1 and migrate existing IP settings from eth0. You can find it in the bottom of this post.
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Here’s how to set up relatively cheap redundant iSCSI storage on Linux. The redundancy is achieved using LVM mirroring, and the storage servers consist of commodity hardware, running the OpenFiler Linux distribution, which expose their disks to the clients using iSCSI over Ethernet. The servers are completely separate entities, and the purpose of this mirroring is to keep the logical volumes available, even while one of the storage servers is down for maintenance or due to hardware failure.
Ultimately the disks of the iSCSI target servers will show up as normal SCSI disks on the client (/dev/sdb, /dev/sdc, …). The data will be moved across the network transparently. It is preferable to use multiple gigabit network interface cards on both the initiator and the target, and bond them together for reliability and speed gain (or use Device Mapper Multipath). A separate VLAN for iSCSI traffic is recommended for security and speed. By default, the traffic is not encrypted so your disk blocks can easily be sniffed using tcpdump.
I always forget what the correct options for the Windows xcopy command are when I simply want to synchronize one directory over another one. To do it well, you need to remember too many options. And robocopy is never installed when you need it.
First, create a key-pair with ssh-keygen. This is a one-time operation.
ssh-keygen -t dsa
It is good practice to enter a good password, but you may also leave the password empty. That will leave your private key vulnerable to local attacks, but if you need to login somewhere from a cron job, you probably need to do that.
I upgraded my Lenovo Thinkpad X300 to Ubuntu 8.10 Intrepid Ibex today. My original installation notes for Hardy are here.
After the upgrade, sound was working without compiling an ALSA snapshot by hand. Also, 3G connections worked straight out of the NetworkManager applet, which is very nice. But WiFi was broken, as the nm-applet refused to connect to any SSID, encrypted or open. That seemed to be due to myself using the development networkmanager packages with Hardy. They were not upgraded correctly. The remedy was to remove all network-manager packages and reinstall them. Read the rest of this entry »
I was not able to compile PHP 5.2.6 with IBM HTTP Server 6.1 as a module, so I compiled it as a CGI binary instead. Here’s how to do it. Read the rest of this entry »
Ths SSH protocol supports tunneling arbitrary ports from your local host to a remote network that is only reachable through a remote gateway machine. The typical situation is that you have a, say, web server in a network which is only accessible from inside the network. If you have an ssh gateway machine within the network, you can get to the web server using tunneling. Read the rest of this entry »
Here’s how to make dynamic IPv6 routing work between a Cisco IOS router and an OpenWRT Linux Quagga router. I couldn’t find a similar howto anywhere, so I decided to write my own.
I am using OpenWRT Kamikaze 7.09 (kernel 2.4) on an ASUS WL-500gP wireless router. Any IPv6 enabled Cisco router should do.
I assume you have already installed the IPV6 kernel modules and userland tools, and set up static addresses for your interfaces (if you haven’t check out the OpenWRT IPv6 Howto).
I am using SixXS for tunneling an IPv6 /48 prefix over IPv4. Read the rest of this entry »
