linux的初探之更新源

　　linux软件安装，大多直接利用yum安装，避免了依赖引起的其他问题，而默认提供的源不一定存在需要的软件版本，因此需要更新源。

　　当前个人的centos版本为7

　　1安装含php5.6的remi repo（centos 7）

$ rpm -Uvh http://download.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
$ rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-7.rpm

　　2查看现在的repo

[root@iZwz9agxh9ddcfm68xu5iqZ ~]# yum repolist all
Loaded plugins: langpacks
repo id                                  repo name                                                                                      status
base/7/x86_64                            CentOS-7 - Base                                                                                enabled:  9,363
base-debuginfo/x86_64                    CentOS-7 - Debuginfo                                                                           disabled
base-source/7                            CentOS-7 - Base Sources                                                                        disabled
centosplus/7/x86_64                      CentOS-7 - Plus                                                                                disabled
centosplus-source/7                      CentOS-7 - Plus Sources                                                                        disabled
contrib/7/x86_64                         CentOS-7 - Contrib                                                                             disabled
extras-source/7                          CentOS-7 - Extras Sources                                                                      disabled
fasttrack/7/x86_64                       CentOS-7 - fasttrack                                                                           disabled
remi                                     Remi's RPM repository for Enterprise Linux 7 - x86_64                                          disabled
remi-php55                               Remi's PHP 5.5 RPM repository for Enterprise Linux 7 - x86_64                                  disabled
remi-php55-debuginfo/x86_64              Remi's PHP 5.5 RPM repository for Enterprise Linux 7 - x86_64 - debuginfo                      disabled
remi-php56                               Remi's PHP 5.6 RPM repository for Enterprise Linux 7 - x86_64                                  enabled:    384
remi-php56-debuginfo/x86_64              Remi's PHP 5.6 RPM repository for Enterprise Linux 7 - x86_64 - debuginfo                      disabled
remi-php70                               Remi's PHP 7.0 RPM repository for Enterprise Linux 7 - x86_64                                  disabled
remi-php70-debuginfo/x86_64              Remi's PHP 7.0 RPM repository for Enterprise Linux 7 - x86_64 - debuginfo                      disabled
remi-php70-test                          Remi's PHP 7.0 test RPM repository for Enterprise Linux 7 - x86_64                             disabled
remi-php70-test-debuginfo/x86_64         Remi's PHP 7.0 test RPM repository for Enterprise Linux 7 - x86_64 - debuginfo                 disabled
...

　　发现了php5.6的remi，而status为disabled，因此需要开启。

　　2安装yum-config-manager

$ yum search yum-config-manager
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: ftp.yzu.edu.tw
 * epel: mirror01.idc.hinet.net
 * extras: ftp.yzu.edu.tw
 * remi-safe: mirror.innosol.asia
 * updates: ftp.yzu.edu.tw
=================================== Matched: yum-config-manager ===================================
remi-release.noarch : YUM configuration for remi repository
yum-utils.noarch : Utilities based around the yum package manager
$ yum install yum-utils

　　3开启repo

$ yum-config-manager --enable remi
$ yum-config-manager --enable remi-php56

　　4此时再搜索yum search php可以发现很多的php的版本，此后再正常安装。