安装lsb_release

lsb_release命令用来查看当前系统的发行版信息（prints certain LSB (Linux Standard Base) and Distribution information.）。有了这个命令就可以清楚的知道到底是RedHat的、还是别的发行版，还有具体的版本号，比如3.4还是5.4等等。有些系统上不一定安装了这个命令，可以通过查看/etc/issue文件得到发行版信息。

[root@localhost linux-3.18.26]# cat /etc/issueCentOS release 6.6 (Final)Kernel \r on an \m

但一般这个命令用习惯了，如果没有我们可以安装一下。具体步骤如下：

1）查找哪个源包含这个命令

[root@localhost linux-3.18.26]# yum provides */lsb_releaseLoaded plugins: fastestmirrorLoading mirror speeds from cached hostfileredhat-lsb-core-4.0-7.el6.centos.x86_64 : LSB base libraries support for CentOSRepo        : ustack_custom_productsMatched from:Filename    : /usr/bin/lsb_release

2）从上面的输出可以看到redhat-lsb-core-4.0-7.el6.centos.x86_64这个package包含这个命令，那就安装这个包。

64ot@localhost linux-3.18.26]# yum install redhat-lsb-core-4.0-7.el6.centos.x86_Loaded plugins: fastestmirrorSetting up Install ProcessLoading mirror speeds from cached hostfileResolving Dependencies--> Running transaction check---> Package redhat-lsb-core.x86_64 0:4.0-7.el6.centos will be installed--> Processing Dependency: perl-Test-Simple for package: redhat-lsb-core-4.0-7.el6.centos.x86_64--> Processing Dependency: perl-Test-Harness for package: redhat-lsb-core-4.0-7.el6.centos.x86_64--> Processing Dependency: perl-ExtUtils-MakeMaker for package: redhat-lsb-core-4.0-7.el6.centos.x86_64--> Processing Dependency: perl-CGI for package: redhat-lsb-core-4.0-7.el6.centos.x86_64--> Processing Dependency: /usr/bin/time for package: redhat-lsb-core-4.0-7.el6.centos.x86_64--> Processing Dependency: /usr/bin/pax for package: redhat-lsb-core-4.0-7.el6.centos.x86_64--> Processing Dependency: /usr/bin/patch for package: redhat-lsb-core-4.0-7.el6.centos.x86_64--> Processing Dependency: /usr/bin/msgfmt for package: redhat-lsb-core-4.0-7.el6.centos.x86_64--> Processing Dependency: /usr/bin/man for package: redhat-lsb-core-4.0-7.el6.centos.x86_64--> Processing Dependency: /usr/bin/batch for package: redhat-lsb-core-4.0-7.el6.centos.x86_64--> Processing Dependency: /usr/bin/at for package: redhat-lsb-core-4.0-7.el6.centos.x86_64--> Processing Dependency: /bin/mailx for package: redhat-lsb-core-4.0-7.el6.centos.x86_64--> Processing Dependency: /bin/gettext for package: redhat-lsb-core-4.0-7.el6.centos.x86_64--> Processing Dependency: /bin/ed for package: redhat-lsb-core-4.0-7.el6.centos.x86_64--> Running transaction check---> Package at.x86_64 0:3.1.10-43.el6_2.1 will be installed---> Package ed.x86_64 0:1.1-3.3.el6 will be installed---> Package gettext.x86_64 0:0.17-16.el6 will be installed--> Processing Dependency: cvs for package: gettext-0.17-16.el6.x86_64---> Package mailx.x86_64 0:12.4-7.el6 will be installed---> Package man.x86_64 0:1.6f-32.el6 will be installed--> Processing Dependency: lzma for package: man-1.6f-32.el6.x86_64---> Package patch.x86_64 0:2.6-6.el6 will be installed---> Package pax.x86_64 0:3.4-10.1.el6 will be installed---> Package perl-CGI.x86_64 0:3.51-131.el6_4 will be installed---> Package perl-ExtUtils-MakeMaker.x86_64 0:6.55-131.el6_4 will be installed--> Processing Dependency: perl-devel for package: perl-ExtUtils-MakeMaker-6.55-131.el6_4.x86_64---> Package perl-Test-Harness.x86_64 0:3.17-131.el6_4 will be installed---> Package perl-Test-Simple.x86_64 0:0.92-131.el6_4 will be installed---> Package time.x86_64 0:1.7-37.1.el6 will be installed--> Running transaction check---> Package cvs.x86_64 0:1.11.23-15.el6 will be installed---> Package perl-devel.x86_64 4:5.10.1-131.el6_4 will be installed--> Processing Dependency: perl(ExtUtils::ParseXS) for package: 4:perl-devel-5.10.1-131.el6_4.x86_64---> Package xz-lzma-compat.x86_64 0:4.999.9-0.5.beta.20091007git.el6 will be installed--> Running transaction check---> Package perl-ExtUtils-ParseXS.x86_64 1:2.2003.0-131.el6_4 will be installed--> Finished Dependency ResolutionDependencies Resolved================================================================================ Package               Arch   Version              Repository              Size================================================================================Installing: redhat-lsb-core       x86_64 4.0-7.el6.centos     ustack_custom_products  25 kInstalling for dependencies: at                    x86_64 3.1.10-43.el6_2.1    ustack_custom_products  60 k cvs                   x86_64 1.11.23-15.el6       ustack_custom_products 711 k ed                    x86_64 1.1-3.3.el6          ustack_custom_products  72 k gettext               x86_64 0.17-16.el6          ustack_custom_products 1.8 M mailx                 x86_64 12.4-7.el6           ustack_custom_products 235 k man                   x86_64 1.6f-32.el6          ustack_custom_products 263 k patch                 x86_64 2.6-6.el6            ustack_custom_products  90 k pax                   x86_64 3.4-10.1.el6         ustack_custom_products  69 k perl-CGI              x86_64 3.51-131.el6_4       ustack_custom_products 208 k perl-ExtUtils-MakeMaker                       x86_64 6.55-131.el6_4       ustack_custom_products 292 k perl-ExtUtils-ParseXS x86_64 1:2.2003.0-131.el6_4 ustack_custom_products  44 k perl-Test-Harness     x86_64 3.17-131.el6_4       ustack_custom_products 230 k perl-Test-Simple      x86_64 0.92-131.el6_4       ustack_custom_products 111 k perl-devel            x86_64 4:5.10.1-131.el6_4   ustack_custom_products 421 k time                  x86_64 1.7-37.1.el6         ustack_custom_products  26 k xz-lzma-compat        x86_64 4.999.9-0.5.beta.20091007git.el6                                                   ustack_custom_products  16 kTransaction Summary================================================================================Install      17 Package(s)Total download size: 4.6 MInstalled size: 12 MIs this ok [y/N]: yDownloading Packages:(1/17): at-3.1.10-43.el6_2.1.x86_64.rpm                  |  60 kB     00:00(2/17): cvs-1.11.23-15.el6.x86_64.rpm                    | 711 kB     00:00(3/17): ed-1.1-3.3.el6.x86_64.rpm                        |  72 kB     00:00(4/17): gettext-0.17-16.el6.x86_64.rpm                   | 1.8 MB     00:00(5/17): mailx-12.4-7.el6.x86_64.rpm                      | 235 kB     00:00(6/17): man-1.6f-32.el6.x86_64.rpm                       | 263 kB     00:00(7/17): patch-2.6-6.el6.x86_64.rpm                       |  90 kB     00:00(8/17): pax-3.4-10.1.el6.x86_64.rpm                      |  69 kB     00:00(9/17): perl-CGI-3.51-131.el6_4.x86_64.rpm               | 208 kB     00:00(10/17): perl-ExtUtils-MakeMaker-6.55-131.el6_4.x86_64.r | 292 kB     00:00(11/17): perl-ExtUtils-ParseXS-2.2003.0-131.el6_4.x86_64 |  44 kB     00:00(12/17): perl-Test-Harness-3.17-131.el6_4.x86_64.rpm     | 230 kB     00:00(13/17): perl-Test-Simple-0.92-131.el6_4.x86_64.rpm      | 111 kB     00:00(14/17): perl-devel-5.10.1-131.el6_4.x86_64.rpm          | 421 kB     00:00(15/17): redhat-lsb-core-4.0-7.el6.centos.x86_64.rpm     |  25 kB     00:00(16/17): time-1.7-37.1.el6.x86_64.rpm                    |  26 kB     00:00(17/17): xz-lzma-compat-4.999.9-0.5.beta.20091007git.el6 |  16 kB     00:00--------------------------------------------------------------------------------Total                                           2.7 MB/s | 4.6 MB     00:01Running rpm_check_debugRunning Transaction TestTransaction Test SucceededRunning Transaction  Installing : 1:perl-ExtUtils-ParseXS-2.2003.0-131.el6_4.x86_64           1/17  Installing : 4:perl-devel-5.10.1-131.el6_4.x86_64                        2/17  Installing : perl-Test-Harness-3.17-131.el6_4.x86_64                     3/17  Installing : perl-ExtUtils-MakeMaker-6.55-131.el6_4.x86_64               4/17  Installing : perl-Test-Simple-0.92-131.el6_4.x86_64                      5/17  Installing : at-3.1.10-43.el6_2.1.x86_64                                 6/17  Installing : time-1.7-37.1.el6.x86_64                                    7/17  Installing : cvs-1.11.23-15.el6.x86_64                                   8/17  Installing : gettext-0.17-16.el6.x86_64                                  9/17  Installing : perl-CGI-3.51-131.el6_4.x86_64                             10/17  Installing : pax-3.4-10.1.el6.x86_64                                    11/17  Installing : patch-2.6-6.el6.x86_64                                     12/17  Installing : mailx-12.4-7.el6.x86_64                                    13/17  Installing : xz-lzma-compat-4.999.9-0.5.beta.20091007git.el6.x86_64     14/17  Installing : man-1.6f-32.el6.x86_64                                     15/17  Installing : ed-1.1-3.3.el6.x86_64                                      16/17  Installing : redhat-lsb-core-4.0-7.el6.centos.x86_64                    17/17  Verifying  : man-1.6f-32.el6.x86_64                                      1/17  Verifying  : perl-Test-Harness-3.17-131.el6_4.x86_64                     2/17  Verifying  : ed-1.1-3.3.el6.x86_64                                       3/17  Verifying  : xz-lzma-compat-4.999.9-0.5.beta.20091007git.el6.x86_64      4/17  Verifying  : 1:perl-ExtUtils-ParseXS-2.2003.0-131.el6_4.x86_64           5/17  Verifying  : redhat-lsb-core-4.0-7.el6.centos.x86_64                     6/17  Verifying  : perl-ExtUtils-MakeMaker-6.55-131.el6_4.x86_64               7/17  Verifying  : mailx-12.4-7.el6.x86_64                                     8/17  Verifying  : patch-2.6-6.el6.x86_64                                      9/17  Verifying  : gettext-0.17-16.el6.x86_64                                 10/17  Verifying  : pax-3.4-10.1.el6.x86_64                                    11/17  Verifying  : perl-CGI-3.51-131.el6_4.x86_64                             12/17  Verifying  : cvs-1.11.23-15.el6.x86_64                                  13/17  Verifying  : time-1.7-37.1.el6.x86_64                                   14/17  Verifying  : perl-Test-Simple-0.92-131.el6_4.x86_64                     15/17  Verifying  : at-3.1.10-43.el6_2.1.x86_64                                16/17  Verifying  : 4:perl-devel-5.10.1-131.el6_4.x86_64                       17/17Installed:  redhat-lsb-core.x86_64 0:4.0-7.el6.centosDependency Installed:  at.x86_64 0:3.1.10-43.el6_2.1  cvs.x86_64 0:1.11.23-15.el6  ed.x86_64 0:1.1-3.3.el6  gettext.x86_64 0:0.17-16.el6  mailx.x86_64 0:12.4-7.el6  man.x86_64 0:1.6f-32.el6  patch.x86_64 0:2.6-6.el6  pax.x86_64 0:3.4-10.1.el6  perl-CGI.x86_64 0:3.51-131.el6_4  perl-ExtUtils-MakeMaker.x86_64 0:6.55-131.el6_4  perl-ExtUtils-ParseXS.x86_64 1:2.2003.0-131.el6_4  perl-Test-Harness.x86_64 0:3.17-131.el6_4  perl-Test-Simple.x86_64 0:0.92-131.el6_4  perl-devel.x86_64 4:5.10.1-131.el6_4  time.x86_64 0:1.7-37.1.el6  xz-lzma-compat.x86_64 0:4.999.9-0.5.beta.20091007git.el6Complete!

3）验证命令。

[root@localhost linux-3.18.26]# lsb_release -aLSB Version::base-4.0-amd64:base-4.0-noarch:core-4.0-amd64:core-4.0-noarchDistributor ID:CentOSDescription:CentOS release 6.6 (Final)Release:6.6Codename:Final