查看Linux 版本方法
# lsb_release -a
LSB Version: :core-4.0-amd64:core-4.0-ia32:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-ia32:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-ia32:printing-4.0-noarch
Distributor ID: CentOS
Description: CentOS release 5.8 (Final)
Release: 5.8

Codename: Final

# lsb_release --help
FSG lsb_release v2.0 prints certain LSB (Linux Standard Base) and Distribution information.
Usage: lsb_release [OPTION]...         With no OPTION specified defaults to -v.
Options:
  -v, --version          Display the version of the LSB specification against which the distribution is compliant.
  -i, --id                     Display the string id of the distributor.
  -d, --description   Display the single line text description of the distribution.
  -r, --release          Display the release number of the distribution.
  -c, --codename    Display the codename according to the distribution release.
  -a, --all                   Display all of the above information.
  -s, --short              Use short output format for information requested by other options (or version if none).

  -h, --help               Display this message.

# uname --help
Usage: uname [OPTION]...
Print certain system information.  With no OPTION, same as -s.
  -a, --all   print all information, in the following order,except omit -p and -i if unknown
  -s, --kernel-name        print the kernel name
  -n, --nodename           print the network node hostname
  -r, --kernel-release     print the kernel release
  -v, --kernel-version     print the kernel version
  -m, --machine             print the machine hardware name
  -p,  --processor            print the processor type or "unknown"
  -i,   --hardware-platform  print the hardware platform or "unknown"
  -o,  --operating-system   print the operating system
        --help       display this help and exit
        --version  output version information and exit

Report bugs to <bug-coreutils@gnu.org>.

 # cat /etc/redhat-release
CentOS release 5.8 (Final)

# rpm -q redhat-release

# rpm -q centos-release
CentOS release 5.8 (Final)