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#!/bin/sh

# This program has two feature.
#
# 1. Create a disk image on RAM.
# 2. Mount that disk image.
#
# Usage:
#   $0 <dir> <size>
#

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# move to home directory
cd ~

# move the .zsh_history file into another .zsh_history_bad file
mv .zsh_history .zsh_history_bad

# write all printable strings into a new .zsh_history file
strings .zsh_history_bad > .zsh_history

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// #popclip extension for ChatGPT
// name: ChatGPT Quick Actions
// icon: iconify:logos:openai-icon
// language: javascript
// module: true
// entitlements: [network]
// options: [{
//   identifier: apikey, label: API Key, type: string,
//   description: 'Obtain API key from https://platform.openai.com/account/api-keys'
// }]

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XDG - Base Directory Specification

Directories

Base

The intended use-case for BaseDirectories is to query the paths of user-invisible standard directories that have been defined according to the conventions of the operating system the library is running on.

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Setting up a GPU server with scheduling and containers

Our group recently acquired a new server to do some deep learning: a SuperMicro 4029GP-TRT2, stuffed with 8x NVidia RTX 2080 Ti. Though maybe a bit overpowered, with upcoming networks like BigGAN and fully 3D networks, as well as students joining our group, this machine will be used quite a lot in the future.

One challenge is, is how to manage these GPUs. There are many approaches, but given that most PhD candidates aren't sysadmins, these range from 'free-for-all', leading to one person hogging all GPUs for weeks due to a bug in the code, to Excel sheets that noone understands and noone adheres to because changing GPU ids in code is hard. This leads to a lot of frustration, low productivity and under-utilisation of these expensive servers. Another issue is conflicting software versions. TensorFlow and Keras, for example, tend to do breaking API changes every now and then. As t

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Mount Volumes into Proxmox VMs with Virtio-fs

Part of collection: Hyper-converged Homelab with Proxmox

Virtio-fs is a shared file system that lets virtual machines access a directory tree on the host. Unlike existing approaches, it is designed to offer local file system semantics and performance. The new virtiofsd-rs Rust daemon Proxmox 8 uses, is receiving the most attention for new feature development.

Performance is very good (while testing, almost the same as on the Proxmox host)

VM Migration is not possible yet, but it's being worked on!

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Job Control in ZSH and Bash

All processes in ZSH/Bash under job control are in 3 states: foregrounded, backgrounded and suspended.

# run command in the foreground
command
# run commend in the background

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#!/bin/sh

# This is a skeleton of a bash daemon. To use for yourself, just set the
# daemonName variable and then enter in the commands to run in the doCommands
# function. Modify the variables just below to fit your preference.

daemonName="DAEMON-NAME"

pidDir="."
pidFile="$pidDir/$daemonName.pid"

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#!/usr/bin/env bash

# This software is freely available under the Apache 2.0 license.
# Full license available here: https://www.apache.org/licenses/LICENSE-2.0.txt

set -o errexit
set -o nounset
set -o pipefail

# Retry a command on a particular exit code, up to a max number of attempts,

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#!/bin/sh

# show_wifi_clients.sh
# Shows MAC, IP address and any hostname info for all connected wifi devices
# modification based on https://openwrt.org/faq/how_to_get_a_list_of_connected_clients

echo    "# All connected wifi devices, with IP address,"
echo    "# hostname (if available), and MAC address."

printf "%-15s %-15s %15s\n" "IP address" "Host" "MAC"