Axis 2401 - PHP3 GUIDE Technické informace stáhnout pdf (Strana 60)

An Introduction to Shells in General

Axis Communications AB provides NO support for application development of any kind. The information

here is provided "as is", and there is no guarantee that any of the examples shown will work in your

particular application.

Revision 1.02 October 2002 60

5.3.50 true

Syntax: true

Return an exit code of TRUE (0).

Example:

$ true

$ echo $?

5.3.51 tty

Syntax: tty

Print the file name of the terminal connected to standard input.

Options:

-s print nothing, only return an exit status

Example:

$ tty

/dev/tty2

5.3.52 umount

Syntax: umount [flags] filesystem|directory

Unmount file systems.

Flags:

-a: Unmount all file systems in /etc/mtab

-n: Don't erase /etc/mtab entries

-r: Try to remount devices as read-only if mount is busy

-f: Force filesystem umount (i.e. unreachable NFS server)

-l: Do not free loop device (if a loop device has been used)

Example:

$ umount /dev/hdc1

5.3.53 uname

Syntax: uname [OPTION]...

Print certain system information. With no OPTION, same as -s.

Options:

-a print all information

-m the machine (hardware) type

-n print the machine's network node hostname

-r print the operating system release

-s print the operating system name

-p print the host processor type

-v print the operating system version

Example:

$ uname -a

1 2 ... 55 56 57 58 59 60 61 62 63 64 65 ... 84 85

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Axis 2401 - PHP3 GUIDE Technické informace Strana 60