Practical Linux

#

Octothorpe (also called pound sign or hash mark). Usually denoting a comment.

$HOME

Environment variable that points to your login directory.

$PATH

Pathname environment variable.

$PATH

The shell environment variable that contains a set of directories to be searched for UNIX commands.

$TERM

Terminal-type environment variable.

$USER

Environment variable containing the name of the current user.

.1

Files with this extension contain manual page entries. The actual extension can be any value between 1 and 9 and can have an alphabetic suffix (.3x, .7, and so on).

.ag

Applixware graphics file.

.as

Applixware spreadsheet file.

.aw

Applixware word processing file.

.bmp

Bitmap graphics ...