OpenBSD version 6.3 has been released. OpenBSD is demonstrating to be an excellent server operating system. Security is more critical now than ever before. OpenBSD leads the pack when it comes to security features. OpenBSD provides a very robust and trustworthy system that comes with the cutting-edge security feature. OpenBSD 6.3 continues to offer the “multi-platform, ultra-secure operating system” experience. The OpenBSD team releases a new version every six months.
Continue reading “OpenBSD 6.3 released ( Download of the day )”
One of the most common mistakes is typing sl instead of ls command. I set up an alias, i.e., alias sl=ls; but then you may miss out the steam train with a whistle.
sl is a joke software or classic UNIX game. It is a steam locomotive runs across your screen if you type “sl” (Steam Locomotive) instead of “ls” by mistake. Now there is a twist to older sl command.
Continue reading “Linux/Unix desktop fun: sl – a mirror version of ls”
Exim is a free and open source message transfer agent (MTA) developed at the University of Cambridge. It is famous on Unix and Linux systems connected to the Internet. It is freely available under the terms of the GNU General Public Licence. There is a buffer overflow in base64d() of Exim MTA that allows an attacker to run code remotely. ALL versions of Exim MTA affected by overflow vulnerability i.e. CVE-2018-6789.
Continue reading “400K+ Exim MTA affected by overflow vulnerability on Linux/Unix”
The Matrix is a science fiction action movie from 1999. It was written and directed by the Wachowski Brothers. The film has falling green characters on screen. The digital rain is representing the activity of the virtual reality in “The Matrix.” You can now have Matrix digital rain with CMatrix on a Linux or Unix terminal too.
I have like over 50k+ comments posted on this site. A commenter is allowed to leave their website or Github/Twitter URL in the comment section. Unfortunately, many websites are dead creating a mess. Many are just spam and nothing else. This is not good for anyone. Here is a quick way to delete all existing comment author URLs in WordPress using mysql command line option.
WordPress version 4.4 and above use a filter called pre_get_document_title() for a customzing title for each page, post, tag, category and more. For example, I can change 404 error title using this filter. One can use the wp_title() which was formerly deprecated in version 4.4 but was returned for compatibility reasons.
FreeBSD includes software from the OpenSSL Project for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols. OpenSSL has multiple vulnerabilities on a FreeBSD. Currently, no workaround is available. You need to update OpenSSL on FreeBSD version 10.x and 11.x.
I like htop interactive process viewer. Recently I found another one called gtop. It is similar to top, but fancier. Let us see how to install and use gtop on a Linux or macOS Unix based system.
The vim editor is a free and open source text editor. It is a clone of vi text editor. Vim is extremely popular among the Linux, macOS and Unix-like system users. Vim has many commands. It comes with a pretty extensive built-in manual too. One might get lost in the built-in manual. Let us see if “Mastering Vim Quickly From WTF to OMG in no time” can help a new or experienced vim user to increase productivity.
You can configure sudo command to insult user when they type the wrong password. Now, it is possible to
abuse insult the user when they enter the wrong command at the shell prompt.