How to Fix : sudo: unable to resolve host my_user: No such file or directory

If you have changed the hostname of your Linux PC, by using command from https://lynxbee.com/changing-hostname-in-ubuntu/ there are chances you may get an warnings like below everytime you type some commands with sudo permission in terminal and taking considerable time to return the command output, So, it shows it took almost 30 sec for simple cat … Read more

How to install Zoom on Ubuntu 16.04, 18.04, 20.04 LTS ?

Zoom

Zoom provides video communications, with a secure, easy platform for video and audio conferencing, messaging, and webinars across mobile, desktop, and room systems. With zoom we will also be able to share our screen. Below we will describe how to install Latest Zoom on latest ubuntu version, You can use below commands on terminal for … Read more

How to install docker on 32 bit Ubuntu ?

If you want to install docker on ubuntu, follow below procedure, Above two commands will install docker on 32 bit ubuntu and start the container, we can check the status as, If we want to start the docker container using container Id, execute the following command, where, acac0f429e2e is a docker container ID, as seen … Read more

Scan, Pair, Connect to Bluetooth device from Ubuntu from command line using bluetoothctl

bluetoothctl is bluetooth control tool which allows us to make the host discoverable, scan other devices, pair to the scanned devices and also connect to those devices using command line utility on ubuntu. Follow below commands for the same. Commands are self explanatory, replace scaned mac address of your device instead of “6C:C4:D5:6C:C5:BC” whereever required.

How to Scan and display list of available wireless networks ?

LINSSID – linssid is a graphical wireless scanner, LinSSID displays locally receivable 802.11 wireless attach points and ad hoc networks. A table is displayed with various parameters such as MAC address, channel, and signal strength. Graphs are also displayed with signal strength by channel and signal strength over time. LinSSID can be used to measure the … Read more

Understanding the Color Code of Linux Files

In Linux everything present is considered as a file, so to differentiate file types from each other for better visibility to user, Linux has specific color codes for the different file types. Below, we will try to create some of the files and know its colors. White Color – Indicates regular files. so it can … Read more

Meaning of different Colors in “ls” command

In Linux everything present is considered as a file, so to differentiate file types from each other for better visibility to user, Linux has specific color codes for the different file types. Below, we will try to create some of the files and know its colors. White Color – Indicates regular files. so it can … Read more

How to identify and kill zombie process in Linux ?

If you already knows whats zombie process and wanted to identify all zombie process’s in you system, you can directly proceed ahead but if you don’t know, we may suggest you first read the article, “What is Zombie process and How to create zombie process in Linux ?” Lets consider, now you have created the … Read more

How to recover data / folder deleted with rm -rf

Today Accidentally I deleted one of my folder in ubuntu which has contained important files, but I wanted to copy those to another machine by tarring it, while there was another archive / tar with same name, I wanted to delete that .tar but deleted folder resulting deleting very important files. To recover those files … Read more

How to disable and / or enable ICMP ping from Linux host ?

To disable the ICMP ping from certain linux host, lets say which has IP of 192.168.0.100 use below command, Type below command on the console of linux PC on which you are trying to enable / disable the ping. $ sudo iptables -A INPUT -p icmp –icmp-type any -j REJECT $ sudo iptables -A OUTPUT … Read more

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