I’ve previously presented a manual process for doing this, but lately I’ve had to do it more often, and I figured it was about time for automation. This script will: Run e2fsck on the root file system Erase logfiles, such as bash_history and stuff in /var/log Erase the test.h264 video file Wipe resolv.conf Defragment the […]
Mostly notes to myself, but hey, maybe it helps you too! Get Kali for the GPD Pocket I installed using re4son’s modified image from here. Removing the GRUB splash screen (it’s sideways anyway, which looks horrible, and I’m not multibooting) /etc/default/grub GRUB_TIMEOUT=0 GRUB_BACKGROUND=”” Speeding up WiFi so it doesn’t lag if you SSH into the […]
Tasked with cleaning up an installation script, I noticed it was calling dpkg dozens of times to verify that the required packages were in place. On a Raspberry Pi, or similar low powered device, this takes ages. I replaced it with the following: c=0 while read -r pkg; do printf ‘Missing package: %s\n’ “$pkg” >&2 […]
No subprocess, no sleep command, no coproc, no nothing? Yes. Sleeping in bash script is traditionally done with the sleep (1) command, which is external to bash, the command /bin/sleep. However, if you have a bunch of scripts running that all sleep this way, the output of ps looks like a mess, pstree looks like […]
UPDATE: See the automated script at https://blog.dhampir.no/content/script-for-creating-a-compressed-image-file-from-a-raspbian-sd-card Raspbian, by default, expands to fill the SD card it finds itself on, the first time it boots. After having customized an image to your liking it would be favourable to avoid copying 16 gigabytes of data, or however large your chosen SD card is, each time you […]
Following up on my recent post about making a minimal VPN routing virtual machine to isolate obnoxious VPN clients, another problem you’ll run into if you have the need to connect to a whole lot of client networks is that the networks of different companies tend to overlap, either with your own or with eachother. […]
After it was requested multiple times on my post about using pfSense as a Cisco AnyConnect VPN Client, I finally found some time to document the setup I ended up with as a replacement, the purpose of which was to not clutter up the pfSense box. pfSense, after all, acts as the main company router […]
I write shell scripts. A lot of them. I automate everything with scripts. Many of these scripts need to have some notion of a state. The state needs to be persistent. How do we do that? And could we draw some retro flashback line character table borders while we’re at it? The problem If I […]
When configured as a router, for instance for hosting virtual machines with KVM, a Debian machine with a somewhat recent kernel will not listen to router advertisements from others. This makes sense in many cases, but when you have a VM host in your internal network, which only router function is to allow communication to […]
Exim4 introducted new behaviour in the versions included in Debian Stretch. Suddenly, the RFC max line length of 998 characters is enforced, and emails with lines exceeding this length are returned to sender. For the interested, part of the discussion about this feature is over here: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=839147 Anyway, the solution to this issue in Debian […]