uname

uname prints information about the system you are running on.

uname [options]

$ uname
Peios
$ uname -a
Peios host-01 1.4.0 #1 SMP 2026-05-10 x86_64 Peios

With no option, uname prints the operating-system name — Peios.

What each option prints

Option	Prints
`-s`	The kernel name.
`-o`	The operating-system name — `Peios`.
`-n`	The node name — the name this system is known by on the network.
`-r`	The kernel release.
`-v`	The kernel version.
`-m`	The machine's hardware name (its architecture).
`-p`	The processor type.
`-i`	The hardware platform.
`-a`	Everything — equivalent to `-mnrsvo`.

Give several options and uname prints those fields, in a fixed order, on one line.

The operating system is Peios

uname -o, and the operating-system field of uname -a, report Peios. This is the field a script should check when it wants to confirm what system it is on.

For the machine architecture alone, arch is the shorter command — it prints exactly what uname -m prints.

Exit status

uname returns 0, or 1 if the system information could not be read.

What each option prints #

The operating system is Peios #

Exit status #

See also

What each option prints

The operating system is Peios

Exit status