Notes, fixes and guides.
Sixteen years of working notes — Linux and networking, Django and Laravel deployment, SwiftUI, AWS. Written down mostly so I can find them again.
Troubleshooting LTSP: Firewall
FirewallYou will want to do a lot of testing with the firewall before you call it good. This is an area that often will cause you problems. If…
Troubleshooting LTSP: SSH Key Regeneration
If you see this message you need to update the keys for your network card. "This workstation isn't authorized to connect to server" sudo ltsp-update-sshkeyssudo ltsp-update-image Be sure…
Troubleshooting LTSP: Slow Network Speed
The terminal server is especially sensitive to slow networks. This is simply because the entire operating system is transferred over via the network. You should have at least…
Setting UP LTSP 5 on Ubuntu 8.04
When you set up LTSP on Ubuntu 8.04 you will notice that it is very easy to get going in LTSP 5. Most of the configuration is automatically…
HowTo recompile Debian packages
This article will show how you can rebuild any debian package. You might need to rebuild a package for various reasons: add/remove some compilation options, make some changes to…
kill command on Debian
In technical terms, kill simply sends a signal. By default it sends a signal which requests termination (TERM, or signal 15); but you can also specify a signal,…
Remove debian udev persistent-net-rules
Debian has a customization to udev that will keep network interface names persistent after hardware changes and reboots. Normally this is what you want and you will not care about this, but there…
Sendmail Multiple Queues
Sendmail will use by default a single mail queue. This is what most users will need, and if you don’t have any special requirement you will not care about this.…
Ext3 – Reserved blocks percentage
According to tune2fs manual, reserved blocks are designed to keep your system from failing when you run out of space. Its reserves space for privileged processes such as daemons (like syslogd, for…
Determine the Directory Size Recursively
Sometimes you want to ascertain the space hogs on your system. You might have noticed that a certain top level directory is larger than usual, but you are…
Inline Shell Script with a For Loop
Often I'm asked how to traverse a list of items in a file. You can easily go through a list of items using a for loop. Here's an…
HOWTO mount ISO and DD Image Files
Occasionally, I'll download an image file and want to see what is on it, or make a few changes to it before burning it to CD.The image file…