root
shell
shell script
signal
special file
spool
Glossary
1.A distinguished directory that constitutes the origin of the directory hierarchy in a file system [1].
2.Specifically, the origin for the file system [2] with the conventional path name slash (/).
3.The origin of the directory hierarchy in a file system [1].
4.The super user login.
An industry standard for asynchronous serial data communications between terminal devices, such as printers, computers, and communications equipment. This standard defines a
1.The program sh, which causes other programs to be executed on command; the shell is usually started on a user’s behalf when the user logs in.
2.By analogy, any program started upon logging in.
An executable file of commands taken as input to the shell.
An exceptional occurrence that causes a process to terminate or divert from the normal flow of control; see interrupt.
A state of the operating system in which only one user is supported.
An
To collect and serialize output from multiple processes competing for a single output service.
