Uruchomienie, wykonanie: expr arg1 operator arg2 [ operator arg3 ... ]
Jak działa EXPR, co robi EXPR: Evaluate arguments as expressions and print the results. Arguments and operators must be separated by spaces. In most cases, an argument is an integer, typed literally or represented by a shell variable. There are three types of operators: arithmetic, relational, and logical, as well as keyword expressions. Exit status for expr is 0 (expression is nonzero and nonnull), 1 (expression is 0 or null), or 2 (expression is invalid)
Dostępne opcje, wywołanie EXPR:
- Co znaczy :
- Definicja System administration command. Display the filesystem label on an ext2 filesystem device . Change filesystem label to label if specified co znaczy.
- Co znaczy :
- Definicja environment or, if an environment variable is specified, set it to a new value and display the modified environment. If command is specified, execute it under the modified environment krzyżówka.
- Co znaczy :
- Definicja An interactive command-based editor. For more information, see Chapter 9 co to jest.
- Co znaczy :
- Definicja Start the Enlightened Sound Daemon , also called EsounD , a sound-mixing daemon that allows multiple applications to access a single audio device at one time słownik.
- Co znaczy :
- Definicja media such as a CD-ROM, floppy, tape, or JAZ or ZIP disk. You may name the device by its /dev or /mnt filename. The /dev and /mnt prefixes are optional for any items in the /dev and /mnt directories czym jest.
Użycie EXPR zastosowanie komendy na linii poleceńw Słownik E .
