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If you wondered how to change permissions recursively on files or folders only, here is the how to using the find command. Change permissions recursively to directories only: find /path/to/folder    -type d    -exec  chmod 0755   {}   \; Change permissions recursively to files only: find /path/to/folder    -type f    -exec  chmod [...]

If  your website is under contruction and you want to allow access just to certain IP numbers, placing the following code in the .htaccess  file, in the website root directory, you can block access to everyone except the IP numbers you specify. order deny,allow deny from all allow from 76.33.193.98 allow from 84.23.122.204 allow from 93.34.133.203 [...]

We often need to download a directory from a ftp server to a local computer. You can do this using wget and its -r parameter.  The command would be: wget -l 30 -r ftp://user:pass@host/some_directory/ -l  sets the level depth. default value is 5 layers. i put 30 to be sure wget gets the whole tree

File and Folder permissions on *unix like systems.

Vi is a Unix/Linux terminal based text editor. Despite its overhelming features it is still popular among Unix administrators. I’ll mention some of the most used commands.