Language Selection

English French German Italian Portuguese Spanish

today's leftovers

Filed under
Development
HowTos
  • New Release: Tor Browser 9.0.1

    Tor Browser 9.0.1 is the first bugfix release in the 9.0 series and aims to mostly fix regressions and provide small improvements related to our 9.0 release. Additionally, we are adding a banner on the starting page for our fundraising campaign Take Back the Internet with Tor.

  • 6 Excellent Free Books to Learn TeX

    TeX is a system for typesetting documents. It’s a powerful low-level markup and programming language that creates professional quality typeset text. The system was developed by Donald Knuth at Stanford University with the purpose of enabling anyone to generate high-quality books, and to develop a system that yields the same results whatever computer is used.

    TeX has many strengths including its portability, flexibility, and the fact that it is free software. But being free would mean little if TeX was not highly proficient at typesetting professional looking mathematical and scientific text, complex documents, and handling multiple languages. TeX produces results equal in quality and appearance to those produced by the finest traditional typesetting systems.

  • Tabs or spaces for indentation? Statistics on 3.8 million Perl files created in 24 years

    How are things in the real world? What is actually used?

    It's easy enough to find out. Need to take source codes of programs, to calculate what characters are used and look at the results.

    This article is the result of a little research about the use of tabs and spaces in the world of Perl programming language. There is a huge repository which stores Perl libraries CPAN. I downloaded all the versions of all libraries which are now on CPAN (there were about 135 thousand) and decided which characters are used for indentation.

  • How To Install Varnish Cache on CentOS 8

More in Tux Machines

Android Leftovers

How to Go Full Dark Mode With LibreOffice

LibreOffice is a free and open-source cross-platform office productivity software. If you’re not making the most of it, the LibreOffice Tips article is a must-read. Dark theme is getting popular even among non-programmers. It is less stressing on the eyes specially for extended use of the screen. Some people believe that it makes the texts looks crisp and clear and that helps improve their productivity. Some Linux distributions like Ubuntu come with dark mode these days giving your systems a darker tint. When you turn on the dark mode, some applications will automatically switch to dark mode. Read more

How can I Identify who SSH into my Linux System?

Identifying who has logged into your system in Linux is way easier than the Windows Operating System. In Linux System whenever someone tries to log in using SSH is recorded by the log file, the log file is located in /var/log/auth.log. location can be different in other distribution. If you not found the auth.log file in your system try to execute the below command to view the log from systemctl. journalctl -u sshd |tail -100
  • -u (Show the user journal for the current)
  • sshd (SSH user created by system by default)
  • tail -100 (Print top 100 result from log file)
journalctl of sshd
User logged in using SSH
Read more

How can I Identify who SSH into my Linux System?

Identifying who has logged into your system in Linux is way easier than the Windows Operating System. In Linux System whenever someone tries to log in using SSH is recorded by the log file, the log file is located in /var/log/auth.log. location can be different in other distribution. If you not found the auth.log file in your system try to execute the below command to view the log from systemctl. journalctl -u sshd |tail -100
  • -u (Show the user journal for the current)
  • sshd (SSH user created by system by default)
  • tail -100 (Print top 100 result from log file)
journalctl of sshd
User logged in using SSH
Read more