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–help option gives a short description about using any command when typed in the terminal followed by the particular command in which you need help. Following example shows the use of rmdir command. rmdir –help (press enter) Usage: rmdir [OPTION]… DIRECTORY… Remove the DIRECTORY(ies), if they are empty. [...] Addition to man pages, Info pages are also helpful for any command. You can read any info page by using info command. They contain recent information for and are easier to use. Some of the man pages refer to info pages. For example if you need info of ‘info’ command then just type: info info [...] Man (Manual) pages are overwhelming source of documentation. You can read the manual of any command by typing man followed by the command name in the terminal followed by ‘Enter’ key on your keyboard, a very structured manual will be visible in your terminal. As shown below which is the manual of ls command. Input: [...] Following command creates a new user in Ubuntu by setting up his password, ownership and creating a home directory. sudo useradd user sudo passwd user sudo mkdir /home/user sudo chown newuser /home/user sudo chgrp newuser /home/user Simplest kind is the best kind in technology and it is an art. chown -R www-data:www-data directory Changes the owner & group of both directories and sub directories |
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