Linux version of the system query command

# Uname -a (Linux operating system kernel to see the current version information) 

# CAT / proc / Version (Linux operating system to view the current version information) 

# CAT / etc / Issue or cat / etc / redhat-release ( Linux view the current operating system version release information) 

# CAT / proc / cpuinfo (see cpu Linux-related information, including the type, frequency, core information, etc.) 

# getconf LONG_BIT (Linux version to view how many bits)