Uname

uname is a command-line utility in Linux that displays information about the system, including its kernel name, version, and other details.

Options:

• -a: Displays all available information.
• -s: Displays the kernel name.
• -v: Displays the kernel release version.
• -n: Displays the hostname.
• -r: Displays the kernel release number.
• -m: Displays the machine type (architecture).
• -o: Displays the operating system.

Example Usage:

bash
# Display all available information
uname -a
# Display kernel name
uname -s
# Display kernel release version
uname -v
# Display hostname
uname -n
# Display kernel release number
uname -r
# Display machine type (architecture)
uname -m
# Display operating system
uname -o

Output Examples:

bash
$ uname -a
Linux hostname 4.15.0-45-generic #48-Ubuntu SMP Tue Jan 8 00:04:38 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
$ uname -s
Linux
$ uname -v
#48-Ubuntu SMP Tue Jan 8 00:04:38 UTC 2019
$ uname -n
hostname
$ uname -r
4.15.0-45-generic
$ uname -m
x86_64
$ uname -o
GNU/Linux

The uname command is commonly used in scripts and automation tools to retrieve system information, making it a useful tool for system administrators and developers.