What Do the Colors in ls Output Mean? A Practical Guide
Blue is a directory, green is executable, red means broken or compressed. Here is the full color code for GNU ls, plus a two-minute way to prove each one to yourself.
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Commands and Packages
How to install the latest cmake version on Ubuntu ?
CMake is a widely used build system that helps automate the compilation process for software projects. Keeping … Read more
How to create SSH Keys in Ubuntu / Linux ?
SSH (Secure Shell) keys are a secure and convenient way to authenticate to remote servers without the … Read more
How to Switch Between Multiple Java Versions On Ubuntu Linux ?
If you have installed multiple JDK on ubuntu and sometimes you might need to change the version … Read more
Fixed : openssl/opensslv.h: No such file or directory
When trying to compile some packages / libraries or application source codes in Linux which are based … Read more
Fixed : Waiting for cache lock: Could not get lock
When we tried to install one package using “apt-get install” , we got following error, and we … Read more
How to Install libpangox on Ubuntu ?
The best way to identify which package and its version to install if we just know the … Read more
How to install Lyrebird voice changer for Ubuntu / Linux ?
Lyrebird is a Simple and powerful voice changer for Linux, written in GTK 3. In this post, … 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 … Read more
Safely Rename Parts of Filenames and File Content
Renaming `memory_map.c` to `memory_mapping.c` and changing identifiers inside source files are separate operations. This guide previews both, handles unusual filenames, refuses collisions, keeps backups, and makes rollback practical.
How to Change Hostname for Ubuntu Machine ?
Recently, we wanted to change the hostname of our Ubuntu machine, Lets, check now what is current … Read more
Fix : Lost Sudo user in Linux
Add “Sudo” user If somehow you Lost a “sudo” user which happened to me today, after upgrading … Read more
Install and update npm on Ubuntu
npm is the package manager for the Node JavaScript platform. When we used installed npm on Ubuntu … Read more
Compile JSON-C – JSON implementation in C
JSON-C implements a reference counting object model that allows you to easily construct JSON objects in C, … Read more
Play raw PCM voice/audio files using ffplay on Ubuntu
The microphones in Android or other mobile devices captures raw PCM sample with certain bit rate and … Read more
Identify IP Address’s of all devices in a network
Sometimes someone from within your network starts consuming lot of bandwidth and you just needed to identify … Read more
Install Chromium depot_tools on Ubuntu / Linux
Chromium depot_tools are the git extensions, which gives additional features. The Chromium depot_tools suite contains many git … Read more
Enable and Disable Wireless / WiFi from command line
Rfkill is a tool for enabling and disabling wireless devices. We use “rfkill list” command as below … Read more
Turn ON and Turn OFF Bluetooth from command line
Rfkill is a tool for enabling and disabling wireless devices. Using “rfkill list” command we first check … Read more
Play Audio / Video from Ubuntu Linux command line
Ubuntu supports various media player which allow you to play audio and video from command line. Mplayer … Read more
Download entire website for offline viewing
If you want to use download some website contents such as html pages, css and java script … Read more
List of FTP Clients Available in Ubuntu Linux
For testing FTP server connection from Ubuntu command line, we can use following command, Connected to my_ftp_server_IP220———- … Read more
Setup passwordless SSH Authentication in Linux
On Local Machine, from where you will try to login another machine, we need to use ssh-keygen … Read more
Identify which process keeps port busy on android / Linux
Lets say you are trying to do something with UPNP which reserves port 1900 for all of … Read more