Joseph Zikusooka ~ Zik

A software engineer specializing in open source technologies | Very experienced in building and configuring UNIX/Linux systems and servers. Passionate about developing software applications and hardware for the smart home | Currently serving as the CEO of Jambula Labs and the project leader at JambulaTV, a smart home automation and entertainment platform - https://jambulatv.com | This blog focuses on the following areas: Linux How-Tos and Tutorials ::: IT Security News ::: Free and Libre Open Source Software ::: Smart Home Software ::: Digital Innovations in East Africa https://mastodon.social/@jzik | https://github.com/zikusooka

Year: 2023

Linux, Python, Security, and Open Source Software TIPS

  • 💡 Use the 'lsof' command to quickly identify the ports that a specific service is listening on within a Linux system @opensuse @fedora @climagic Example:SERVICE=sshd; lsof -i -P -n | grep $SERVICE | awk '/LISTEN/ {print $9}' | uniq#ZikTIPs #SysAdmins #Opensource
  • 🚀 If you're using Buildroot, check out my GitHub repo for patches! I've added support for new packages starting with Kea DHCP. 🔧💻 #Buildroot #KeaDHCP #DIY #embedded #Opensourcehttps://github.com/zikusooka/buildroot-patches
  • 💡 Use the following command to quickly check how much space you have left on your Linux filesystem@opensuse @fedora @debian #ZikTIPs #CLI #Opensource #linuxdf -h –output=avail /
  • 💡 If you have SELinux enabled on your Linux system, you can view the context of an object as follows @opensuse @fedora #ZikTIPS #Sysadmin #SELinux #CLI #OpenSUSE #LinuxFor a file:ls -Z [FILE] e.g.ls -Z /etc/selinux/configFor a process:ps -eZ | grep [PROCESS_NAME] e.g.ps -eZ | grep apache2
  • 💡Get the inode number of a file using this simple command line on Linux @opensuse @fedora @archlinux ls -i [FILENAME] e.g.ls -i /etc/fstab#ZikTIPs #CLI #Fedora #OpenSUSE #Debian #opensource
  • 💡 Display a list of all users on a Linux system using the following command @opensuse @fedora @ubuntu #ZikTIPs #CLI #Fedora #OpenSUSE #Ubuntu #opensourcegetent passwd | cut -d ":" -f1
  • 💡 Quickly inspect the contents of a systemd unit file in Linux using the following command #ZikTIPS #CLI #Fedora #Ubuntu #Opensource@opensuse @fedora @debian systemctl cat [UNIT] e.g.systemctl cat sshd.service
  • 💡Display the active WiFi connection using the following command in Linux #ZikTIPs #CLI #WiFi #Opensource@NetworkManager @opensuse @fedora @debian nmcli connection show –activeNOTE: Works on distributions that use #networkmanager
  • 💡️On a Linux system, you can retrieve logging information for a specific service within a designated date range #ZikTIPS #CLI #Systemd #Opensource @fedora @opensuse journalctl -u [UNIT] -S [DATE-START] -U [DATE-END] e.g. journalctl -u sshd -S 2024-10-04 -U 2024-10-12
  • Python 3.13 has been released! It includes a better interactive interpreter, improved error messages, mobile platform support & an experimental JIT compiler #programming #opensource https://docs.python.org/3.13/whatsnew/3.13.html
  • 🚀✨ Exciting news for smart home enthusiasts! Jambula OS (version 2024.10.0) now supports Home Assistant Core installs & upgrades! 🎉 @jambula @home_assistant @raspberrypi ⚙️ Jambula OS is a custom Linux operating system 🐧 designed specifically for SoC devices like the Raspberry Pi 5⬇️ You can download it here: https://github.com/zikusooka/Jambula-OS/ #JambulaOS #RaspberryPi #HomeAssistant #SmartHome #Embedded #DIY #Opensource
  • 💡And like others have mentioned: To quickly see if you are affected by this bug, use the following Linux command @fedora @opensuse @ubuntu systemctl status cups-browsedIf systemd unit is active, stop and disable as follows:sudo systemctl disable –now cups-browsed#ZikTIPs #opensource
  • Attention Systems Administrators: A vulnerability (CVE-2024-47176 …) has been identified in the CUPS package used in various Linux systems. Please refer to the following link for the necessary remediation steps: https://www.evilsocket.net/2024/09/26/Attacking-UNIX-systems-via-CUPS-Part-I/ Also @redhat has a response on this and how to check if you are affected: https://www.redhat.com/en/blog/red-hat-response-openprinting-cups-vulnerabilities#evilsocket #vulnerability #Cups #Printing #Sysadmin #cybersecurity #Opensource
  • 💡 Search for webcams on a Linux system using the following command line @fedora @opensuse #ZikTIPS #CLI #Multimedia #Video #Audio #Opensourcev4l2-ctl –list-devices
  • Excited to share the latest update for Jambula OS, a custom tailored Linux operating system designed for SoC devices like the Raspberry Pi 5!@jambulatv @jambulaOS @michaelgraafhttps://github.com/zikusooka/Jambula-OS🚀 This update of Jambula OS (Version 2024.8) simplifies setup for:- 🌐 A wireless (WiFi) access point i.e. Internet Hotspot- 🔊 A multi-room music/audio server & client- 📺 A Free-To-Air DVB-T2 TV server- 📹 A USB webcam video streaming server#JambulaOS #Raspberrypi #DIY #Opensource
  • 💡️ Display the actual target path of a symbolic link in Linux#ZikTIPs #CLI #Opensourcereadlink -f [LINK]
  • A cheaper version of the Raspberry Pi 5 board is here! @jambulaOS #raspberrypi5 #DIY #embedded #Linuxhttps://www.raspberrypi.com/news/2gb-raspberry-pi-5-on-sale-now-at-50/
  • 💡️Quickly change the bluetooth name advertised by your Linux device such as a raspberrypi @debian @opensuse @fedora bluetoothctl system-alias "NEW-NAME"#ZikTIPs #Bluetooth #Raspberrypi #Opensource
  • 💡Remove or replace multiple occurrences of text with a similar pattern using the command line in Linuxsed /PATTERN*//g [FILE_PATH]Example:sed /systemd-network*//g /opt/my script.sh#ZikTIPs #SysAdmin #CLI #Opensource #opensourcesoftware
  • INTRO: #Introduction #Fediverse #FediHire#Linux #MastodonI am Zik, the guy behind those Linux TIPs. I am passionate about open source software on Linux. I spend a great deal of time on the command line writing shell and python scripts. I am also a buildroot aficionado & maintain Jambula OS Linux.My core strength: Linux/UNIX server management. I am currently available for part time remote work if you need that type of support. Checkout my GitHub repositories at:https://github.com/zikusooka

How to install the latest Python 3 version on Linux using sources

Introduction

Python 3.11.0 was officially released on October 24 2022. However, most Linux distributions have not yet upgraded to the latest Python version i.e. Python 3.11.2 (released on February 8 2023). Please visit this page to see the most recent versions.

The jump from versions 3.10.X to 3.11.X brought with it significant changes and improvements to Python code. Among the improvements is that Python is now 10 – 60% faster than before. That’s a big and noticeable speed boost. So beyond the usual reasons for upgrades i.e. security etc, I really wanted this version on my Linux desktop as soon as the final release was made publicly available.

If you are like me and don’t like waiting for your favourite open-source program to be supported on your Linux distribution, here is how to install the latest Python 3 version on Linux using sources.

Before you begin, check the current version on your Linux system:

python  --version

Currently the version of Python on my Linux system is three (3) releases behind. So it is time for me to upgrade to the most recent version.

CAUTION: Due to the many dependencies on the currently installed Python common package, I highly recommend that you do not remove the existing version. Instead, we will install the latest version in an alternate location e.g. /usr/local

Prerequisites

Please ensure that your Linux system has the following packages installed:

On Ubuntu or Debian:

sudo apt-get install build-essential

sudo apt-get install autoconf automake gdb libffi-dev zlib1g-dev libssl-dev libncurses5-dev libgdbm-dev libnss3-dev libreadline-dev libsqlite3-dev

On Fedora or Rocky Linux:

sudo dnf groupinstall “Development Tools”

sudo dnf install openssl-devel libffi-devel bzip2-devel sqlite-devel

* You will also need wget which is generally included by default on most Linux distributions

Visit the Python downloads page for sources to get the direct link to latest Python source package. In this tutorial I will be using the XZ compressed source tarball i.e. Python-3.11.2.tar.xz

Download the latest Python package to a temporary directory:

wget  -c  -P /tmp  https://www.python.org/ftp/python/3.11.2/Python-3.11.2.tar.xz

Unpack the Python 3 tarball:

tar xvf /tmp/Python-3.11.2.tar.xz -C /usr/src

Compile and build Python:

cd  /usr/src/Python-3.11.2

./configure  --prefix=/usr/local  --enable-shared  --enable-optimizations  --with-system-expat  --with-system-ffi

IMPORTANT: Ensure the prefix i.e. ‘/usr/local’ you use is different from that used by your Linux distribution otherwise you will overwrite the default Python 3 installation!

Optional: You can make some of your modules a permanent part of the Python interpreter. To do so, simply modify the file: Modules/Setup.local before running make. To see my my local setup, see the appendix.

sudo  make

TIP: you can add “– j $(getconf _NPROCESSORS_ONLN)” to the make command in order to speed things up i.e. sudo make -j $(getconf _NPROCESSORS_ONLN)

sudo  make  altinstall

Add the following export command to your shell initialization file:

Using Bash shell:

echo  “export  LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib”  >>  ~/.bashrc

Then source the file for now:

source  ~/.bashrc

To verify if you now have the latest Python 3 (including pip installer) versions:

/usr/local/bin/python3.11 –version

/usr/local/bin/pip3.11 –version

Congratulations! You now have the latest Python 3 version on your Linux system.

NOTE: When your distribution eventually catches up, you can remove this installation by issuing the ‘make uninstall‘ command in the installation directory i.e. /usr/src/Python3.11

Appendix

Here’s my sample ./Modules/Setup.local file:

array -DPy_BUILD_CORE_MODULE arraymodule.c
_contextvars _contextvarsmodule.c
_struct -DPy_BUILD_CORE_MODULE _struct.c
_random _randommodule.c -DPy_BUILD_CORE_MODULE
_elementtree -I$(srcdir)/Modules/expat -DHAVE_EXPAT_CONFIG_H -DUSE_PYEXPAT_CAPI _elementtree.c
_pickle -DPy_BUILD_CORE_MODULE _pickle.c
_datetime _datetimemodule.c
_zoneinfo _zoneinfo.c -DPy_BUILD_CORE_MODULE
_bisect _bisectmodule.c
_asyncio _asynciomodule.c
_json -I$(srcdir)/Include/internal -DPy_BUILD_CORE_BUILTIN _json.c
unicodedata unicodedata.c -DPy_BUILD_CORE_BUILTIN
fcntl fcntlmodule.c
spwd spwdmodule.c
grp grpmodule.c
select selectmodule.c
mmap mmapmodule.c
_csv _csv.c
_socket socketmodule.c
termios termios.c
resource resource.c
_posixsubprocess  -DPy_BUILD_CORE_BUILTIN _posixsubprocess.c
audioop audioop.c
_md5 md5module.c
_sha1 sha1module.c
_sha256 sha256module.c -DPy_BUILD_CORE_BUILTIN
_sha512 sha512module.c -DPy_BUILD_CORE_BUILTIN
_sha3 _sha3/sha3module.c
_blake2 _blake2/blake2module.c _blake2/blake2b_impl.c _blake2/blake2s_impl.c
syslog syslogmodule.c
binascii binascii.c
zlib zlibmodule.c -I$(prefix)/include -L$(exec_prefix)/lib -lz
pyexpat expat/xmlparse.c expat/xmlrole.c expat/xmltok.c pyexpat.c -I$(srcdir)/Modules/expat -DHAVE_EXPAT_CONFIG_H -DXML_POOR_ENTROPY -DUSE_PYEXPAT_CAPI
_multibytecodec cjkcodecs/multibytecodec.c
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