Shell

The linux shell/bash terminal default behaviour is print output to the terminal (StdOut : Standard output). But sometimes we need to change this behaviour like save toi a file, display noting ... Here some exaple of user case.

Prompt for Yes/No/Cancel input in a Linux shell / bash script

Example:

#!/bin/bash

echo "This script will ask a question.";

For that, regenerate locals and setup locale settings.

Generate locals

Ex:# locale-gen en_US.UTF-8

Or :# locale-gen fr_FR.UTF-8

An also you can use # localedef -i en_US -f UTF-8 en_US.UTF-8

Show all columns of a table.

Syntax: SHOW COLUMNS FROM the_table_name;

Example: Show all columns of the mysql user table.

mysql> SHOW COLUMNS FROM mysql.user;

Samba Server

Simple way to create a cifs on debian linux based systems via command line interface (CLI).

1. If not already insttalled, install SAMBA

sudo apt-get update

sudo apt-get install samba

Vi - Vim Ccommand line editor's Usefull commands

vim filename.txt (to create or open a file)

Using chmod, chown chgrp

Change File / Directories permissions.

chmod 0777 . -R #

chmod g+s /var/www #

chmod +x *.sh #

Change File / Folder Owner.

chown www-data:www-data -R .

Change File / Directories Group.

Via PPA

Install PHP 5.4 On linux (Debian, Ubuntu, Mint ...)

sudo apt-get install python-software-properties

sudo add-apt-repository ppa:ondrej/php5-oldstable

sudo apt-get update

sudo apt-get install -y php5

Install Apache 2 server

sudo apt-get install apache2

#Test Apache 2

#Open : http://localhost/

1. Stop the MySQL service of started

sudo /etc/init.d/mysql stop #On Debian based linux systems (Ubuntu, Mint ...)

sudo /etc/init.d/mysqld stop #On Red Hat Enterprise based Linux systems (CentOS, Fedora, Suse ...)