Practical UNIX

[]

Brackets or square brackets, used in various commands and scripts.

{}

Braces or curly braces, used in various commands and scripts.

$HOME

Shell environment variable that points to your logon home directory.

$PATH

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

.bmp

Bitmap graphics file.

.bz2

File compressed using the bzip2 utility, which usually offers better compression than gzip.

.c

C source file.

.gif

GIF graphics file.

.gz

File compressed using the GNU gzip utility, which usually offers better compression than the compress command.

.h

C header file.

.htm

HTML document.

.html

HTML document.

.o

Compiled object file.

.ps

PostScript file.

.tgz

Gzipped tar file.

.tif

TIFF graphics ...