Today I learnt

Today I learned about browser fingerprinting and the differences in how Brave and Firefox handle it. Both browsers block trackers using blocklists, but Brave adds an extra layer of protection by randomizing the fingerprint for each website session. This technique is known as “farbling.” Countless techniques are used in browser fingerprinting, such as User-Agent and headers, TLS fingerprinting (TLS handshake), system configurations (timezone, fonts, screen resolution, etc.), and hardware-related features (Audio, WebGL, etc.). ...

Today I learned that distrobox mounts the host’s $HOME directory into the same path inside the container/box. Also when entering the box it sets all the hosts environment variables inside the container. Some env variables are excluded from the list including HOME, SHELL AND HOSTNAME and XDG*. Refs: Mounting user home into the same path Setting the same env vars inside the container

Today I learned about last, lastb and lastlog which are cli utilities to check last login information. last: Shows a listing of last logged in users lastb: Shows last login tries lastlog: Reports the most recent login of all users or of a given user

Today I learned that pip can install dependancies from git repositories, local directories and weels. Source

Today I learned about the nsswitch config file. The /etc/nsswitch.conf file is used to configure which services are to be used to determine information such as hostnames, password files, and group files. An example of the /etc/nsswitch.conf # Name Service Switch configuration file. # See nsswitch.conf(5) for details. passwd: files systemd group: files [SUCCESS=merge] systemd shadow: files systemd gshadow: files systemd publickey: files hosts: mymachines resolve [!UNAVAIL=return] files myhostname dns networks: files protocols: files services: files ethers: files rpc: files netgroup: files The syntax is the following: ...

Today I learned how to profile Zsh in case of performance issues. To do that we should surround the content of .zshrc with the following: zmodload zsh/zprof # Content of .zshrc zprof

Today I learned that I can use Buildah to mount a container image and install packages on top of it from the host. microcontainer=$(buildah from registry.access.redhat.com/ubi8/ubi-micro) micromount=$(buildah mount $microcontainer) yum install \ --installroot $micromount \ --releasever 8 \ --setopt install_weak_deps=false \ --nodocs -y httpd yum clean all \ --installroot $micromount buildah umount $microcontainer buildah commit $microcontainer ubi-micro-httpd Source