Linux

Software, solutions for (Ubuntu) Linux

Processes

• Kill a process by clicking on its window

Built-in Unix commands

• Search for text in all the files within a directory: grep -rni "your_keyword" *

Security

Lynis

Lynis is an open-source system auditing tool. No installation is required. Get the latest version by cloning it

git clone https://github.com/CISOfy/lynis

All the usage instructions can be accessed through the command line help: ./lynis show help.

Some commands I find useful:

Docker

Use Docker as non-root

sudo groupadd docker  # create a group
sudo usermod -aG docker $USER  # add the current user to that group
newgrp docker  # activate the changes to the groups
docker run hello-world  # verify that you can run docker commands without sudo

Whenever you want to use Docker without root privileges, type newgrp docker to the terminal.

Kitematic

Download and install the latest release. To use without root privileges: open a terminal and type

newgrp docker
kitematic

Audio-video

ffmpeg

• Convert all audio files in a directory

  for i in *.wav; do ffmpeg -i "$i" -acodec mp3 "${i%.*}.mp3"; done