Ubuntu tips and tricks

There are always some command, shortkey or sequence of events I need to remeber once a blue moon and I almost never remeber them. So instead of googling or dumpster diving in the command history, I’ll just try to gather them here. That means this should be a somewhat of a living document..

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System

• sudo systemctl -f -k looks to incoming kernal messages
• sudo journalctl -k --grep=brcmfmac with grep

Vim

Cheat sheet

Command mode (default)

y - copy line
p - paste line
dd - cut  line
d10 - delete 10 lines
u - undo

zsh and powerlevel

Guide

• p10k configure for wizard
• vi ~/.p10k.zsh for manual edit

virtual machines

• Guide
• Guide 2 for Kali and qemu

qcow2 is a “qemu” format which expand the size as needed. The VM can be shutdown with persistent storage.

sudo apt install qemu-kvm

qemu-system-x86_64 \
-enable-kvm                                                    \
-cpu host \
-m 4G                                                          \
-smp 2                                                         \
-hda /opt/virtualmachines/kali-linux-2024.4-qemu-amd64.qcow2   \
-netdev user,id=net0,net=192.168.100.0/24,dhcpstart=192.168.100.9,hostfwd=tcp::1337-:22  \
-device virtio-net-pci,netdev=net0                             \
-vga qxl                                                       \
-device AC97 # For sound if needed