Ubuntu下查看linux版本，内核版本，系统位数，gcc版本
1. 查看linux版本 leblancs@leblancs-virtual-machine:~$ cat /etc/issue Ubuntu 16.10 \n \l leblancs@leblancs-virtual-machine:~$


2. 查看内核版本
1) leblancs@leblancs-virtual-machine:~$ cat /proc/version Linux version 4.8.0-28-generic (buildd@lgw01-16) (gcc version 6.2.0 20161005 (Ubuntu 6.2.0-5ubuntu12) ) #30-Ubuntu SMP Fri Nov 11 14:03:52 UTC 2016 leblancs@leblancs-virtual-machine:~$
2) uname命令 leblancs@leblancs-virtual-machine:~$ uname -a Linux leblancs-virtual-machine 4.8.0-28-generic #30-Ubuntu SMP Fri Nov 11 14:03:52 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux leblancs@leblancs-virtual-machine:~$
3） leblancs@leblancs-virtual-machine:~$ 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 (non-portable) -i, --hardware-platform print the hardware platform (non-portable) -o, --operating-system print the operating system --help display this help and exit --version output version information and exit GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Full documentation at: <http://www.gnu.org/software/coreutils/uname> or available locally via: info '(coreutils) uname invocation' leblancs@leblancs-virtual-machine:~$


3.查看系统位数
1) leblancs@leblancs-virtual-machine:~$ getconf WORD_BIT 32 leblancs@leblancs-virtual-machine:~$ getconf LONG_BIT 64 leblancs@leblancs-virtual-machine:~$
2) leblancs@leblancs-virtual-machine:~$ file /bin/bash /bin/bash: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=6587b60b0a57e1a0f83f7523a658e0bf329fdb5f, stripped leblancs@leblancs-virtual-machine:~$


4. 查看gcc版本 leblancs@leblancs-virtual-machine:~$ gcc --version gcc (Ubuntu 6.2.0-5ubuntu12) 6.2.0 20161005 Copyright (C) 2016 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. leblancs@leblancs-virtual-machine:~$