System calls to handle devices
open close read write ioctl
regular file
file on disk
block special file
device similar to a disk
character special file
device similar to a teletype
/dev directory
contains special files that represent devices
types of special file
block special file
character special file
directories
- are themselves files
toot directory
/
relative pathname
current directory
.
directory above the current one
..
/
- directory name separator
cd
set Current working Directory
C command to see pathname of current working directory
getcwd
locate files from the shell
find
See the full path of a program executed via PATH
which
mv
- (moving directory entry from one directory to another)