Monkey business for the geek in you!
Linux Server Managment
When I type find . -type d -name “foo” command I get Permission denied error messages. How do I exclude all “permission denied: messages from the find command under Linux or Unix like operating systems?The find command is used to locate files on a Linux or Unix like operating system. The find command will search…
How do I install Ansible on Fedora 29 workstation? How can I set up and test Ansible playbooks using my Fedora Linux desktop?Introduction – Ansible is a free and open source configuration management tool. It is similar to Chef or Puppet. It works over SSH based session and does not need any software or client/agent…
I am a new Fedora Linux user. I need to install and set up Chromium for testing purpose. How do I install Chromium browser in my Fedora Linux workstation?Introduction – Chromium is a free and open source software created by Google. Chromium act as the upstream project for Google Chrome browser. The Chromium browser is…
I have setup nginx as a secure reverse proxy server. How do I redirect all http://example.com/ requests (traffic) to https://example.com/ under nginx web server? You can easily rewrite/redirect all http requests to https with Nginx web server. The syntax is as follows. You need to add the following in location or server directives: Syntax –…
I need to save the state of my existing app running on LXD before I push new Python-based app. How do I create snapshots with lxc command for LXD based Linux container?Introduction – LXD Linux system container manager. It gives a user experience comparable to virtual machines but using Linux containers instead. There is no…
How can I set a sudo password for Ansible from the Linux or Unix cli? How can I store sudo password in a vault file and use it securely without exposing my details?You can create encrypted passwords with Ansible playbooks and use it. You need to pass –extra-vars variable to ansible-playbook. Let us see two…
My Dell Laptop came preinstalled with Ubuntu Linux, and I am a new Linux desktop user. How do I change directories in the Linux terminal?Introduction – On Linux the cd command allows you to change directories when using the terminal application. This page shows how to change directory in Linux terminal using the cd command….
Firefox user discovered that Mozilla Firefox is displaying ads on the home or new tab page. When you open Firefox on your desktop, an advertisement banner at the bottom page displayed. The advertisement read as follows: For the holidays, we got you a little something just for using Firefox! Book your next hotel stay on…
The year 2018 turn out to be big newsmaker for Linux and open source world. The most important acquisition in the open source world, Deepfakes, important security flows in CPUs, and the Facebook scandal all happened in 2018. Vivek Gite picks top 10 most significant and biggest news stories from Linux and open source world…
I am a new Ubuntu sysadmin for the Ubuntu Linux operating system. How do I check running process in Ubuntu Linux using the command line option?One can use the Ubuntu Linux command line or terminal app to display a running process, change their priorities level, delete process and more. This page shows how to use…
I want to copy (rsync to a remote server) a directory tree whenever file uploaded or deleted in /var/www/html/upload/ directory under Linux operating systems for backup purpose and/or load balancing purpose without getting into complicated file sharing setups such as NFS or GFS OR iSCSI storage. How do I monitor /var/www/html/upload/ and its subdirectory for…
I am a new to shell scripting. How do I check for NULL value in a Linux or Unix shell scripts? You can quickly test for null or empty variables in a Bash shell script. You need to pass the -z or -n option to the test command or to the if command or use…
How do I find out BIOS version using a Linux command line option? How do I check the motherboard BIOS version using Linux command line option?To find out BIOS version under Linux operating systems use the dmidecode command which is a tool to analyze BIOS data. You must log in as root user to run…
Let us create Linux or Unix console Christmas tree and snow on your Linux desktop just for fun and profit. First, you need to install a Perl module called Acme::POE::Tree. It is an animated Christmas tree module. I’ve tested this on Linux, OS X and Unix-like system.I tested following instructions on a Debian/Ubuntu Linux 17.10/18.04…
I am a new Linux system admin user. How do I use ip command line utility to display or configure networking, routing, and tunnels on Linux operating systems? How do I configures or displays network interface parameters for a network using TCP/IP on Linux operating systems?The ip command is used to assign an address to…
I‘m trying to run the following command:ssh user@box.example.com sudo command1 /path/to/fileBut, an error is displayed follows: sudo: sorry, you must have a tty to run sudo OR sudo: no tty present and no askpass program specified How do I fix this problem on Linux or Unix based systems?This is done in Fedora, RHEL, CentOS, many…
My web server’s log file size is quite huge or large. How do I delete a log file in Linux without disturbing running application? Is there a proper way to clear log files on Unix?You can simply truncate a log file using > filename syntax. For example if log file name is /var/log/foo, try >…
I need to find out if my Linux server is running on 32-bit or 64-bit system. How do I know if my Linux is 32 bit or 64 bit?To check if your Linux server is running a 32-bit or 64-bit system, try the following commands: Get ALL info about CPU on Linux, Execute: lscpu or…
I installed GNU wget utility on FreeBSD as explained here. However, whenever I use the wget command to download stuff from the Internet, it says: ERROR: cannot verify download.freebsd.org’s certificate, issued by ‘CN=Let\’s Encrypt Authority X3,O=Let\’s Encrypt,C=US’: Unable to locally verify the issuer’s authority.How do I fix this problem on FreeBSD 12?Introduction – The default wget…
I run my app inside Ubuntu Linux 16.04 LTS lxd Linux container. To upgrade Ubuntu 16.04 to 18.04 LTS container, I run do-release-upgrade command, but I am getting the error message that read as “Must be connected to a terminal.” How do I fix this problem to upgrade from Ubuntu Linux 16.04 to 18.04 image?Introduction…