解決 CentOS 6 無發透過 yum 安裝/更新問題－Hello World

[root@centos6 ~]# yum -y install net-snmp net-snmp-utils
Loaded plugins: fastestmirror, security
Setting up Install Process
Determining fastest mirrors
YumRepo Error: All mirror URLs are not using ftp, http[s] or file.
Eg. Invalid release/repo/arch combination/
removing mirrorlist with no valid mirrors: /var/cache/yum/x86_64/6/base/mirrorlist.txt
Error: Cannot find a valid baseurl for repo: base

解決方式
[root@centos6 ~]# cd /etc/yum.repos.d
[root@centos6 yum.repos.d]# vi CentOS-Base.repo
編輯以下三個區塊，用下列設定取代
[base]
name=CentOS-$releasever - Base
# mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os&infra=$infra
# baseurl=http://mirror.centos.org/centos/$releasever/os/$basearch/
baseurl=https://vault.centos.org/6.10/os/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

# released updates
[updates]
name=CentOS-$releasever - Updates
# mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates&infra=$infra
# baseurl=http://mirror.centos.org/centos/$releasever/updates/$basearch/
baseurl=https://vault.centos.org/6.10/updates/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

# additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
# mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras&infra=$infra
# baseurl=http://mirror.centos.org/centos/$releasever/extras/$basearch/
baseurl=https://vault.centos.org/6.10/extras/$basearch/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-6

存檔離開

清除暫存檔案
[root@centos6 yum.repos.d]# yum clean all

再試試剛剛的yum 安裝指令看看
如果遇到以下錯誤訊息
[root@centos6 yum.repos.d]# yum -y install net-snmp net-snmp-utils
Loaded plugins: fastestmirror, security
Setting up Install Process
Determining fastest mirrors
Error: Cannot retrieve metalink for repository: epel. Please verify its path and try again

同一個目錄編輯 epel.repo
找到 [epel] 區段
用以下設定取代
[epel]
name=Extra Packages for Enterprise Linux 6 - $basearch
baseurl=http://archives.fedoraproject.org/pub/archive/epel/6/$basearch
#mirrorlist=https://mirrors.fedoraproject.org/metalink?repo=epel-6&arch=$basearch
failovermethod=priority
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6

之後再試試
[root@centos6 yum.repos.d]# yum -y install net-snmp net-snmp-utils
Loaded plugins: fastestmirror, security
Setting up Install Process
Loading mirror speeds from cached hostfile
epel | 4.7 kB 00:00
epel/primary_db | 6.1 MB 00:10
extras | 3.4 kB 00:00
extras/primary_db | 29 kB 00:00
updates | 3.4 kB 00:00
updates/primary_db | 12 MB 01:26
Resolving Dependencies
--> Running transaction check
---> Package net-snmp.x86_64 1:5.5-60.el6_10.2 will be installed
--> Processing Dependency: net-snmp-libs = 1:5.5-60.el6_10.2 for package: 1:net-snmp-5.5-60.el6_10.2.x86_64
--> Processing Dependency: libsensors.so.4()(64bit) for package: 1:net-snmp-5.5-60.el6_10.2.x86_64
--> Processing Dependency: libnetsnmptrapd.so.20()(64bit) for package: 1:net-snmp-5.5-60.el6_10.2.x86_64
--> Processing Dependency: libnetsnmpmibs.so.20()(64bit) for package: 1:net-snmp-5.5-60.el6_10.2.x86_64
--> Processing Dependency: libnetsnmphelpers.so.20()(64bit) for package: 1:net-snmp-5.5-60.el6_10.2.x86_64
--> Processing Dependency: libnetsnmpagent.so.20()(64bit) for package: 1:net-snmp-5.5-60.el6_10.2.x86_64
--> Processing Dependency: libnetsnmp.so.20()(64bit) for package: 1:net-snmp-5.5-60.el6_10.2.x86_64
---> Package net-snmp-utils.x86_64 1:5.5-60.el6_10.2 will be installed
--> Running transaction check
---> Package lm_sensors-libs.x86_64 0:3.1.1-17.el6 will be installed
---> Package net-snmp-libs.x86_64 1:5.5-60.el6_10.2 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

=================
Package Arch Version Repository Size
=================
Installing:
net-snmp x86_64 1:5.5-60.el6_10.2 updates 309 k
net-snmp-utils x86_64 1:5.5-60.el6_10.2 updates 177 k
Installing for dependencies:
lm_sensors-libs x86_64 3.1.1-17.el6 base 38 k
net-snmp-libs x86_64 1:5.5-60.el6_10.2 updates 1.5 M

Transaction Summary
=================
Install 4 Package(s)

Total download size: 2.1 M
Installed size: 6.7 M
Downloading Packages:
(1/4): lm_sensors-libs-3.1.1-17.el6.x86_64.rpm | 38 kB 00:00
(2/4): net-snmp-5.5-60.el6_10.2.x86_64.rpm | 309 kB 00:00
(3/4): net-snmp-libs-5.5-60.el6_10.2.x86_64.rpm | 1.5 MB 00:01
(4/4): net-snmp-utils-5.5-60.el6_10.2.x86_64.rpm | 177 kB 00:00
---------------------------------------------------------------------------------------------------
Total 619 kB/s | 2.1 MB 00:03
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : lm_sensors-libs-3.1.1-17.el6.x86_64 1/4
Installing : 1:net-snmp-libs-5.5-60.el6_10.2.x86_64 2/4
Installing : 1:net-snmp-utils-5.5-60.el6_10.2.x86_64 3/4
Installing : 1:net-snmp-5.5-60.el6_10.2.x86_64 4/4
Verifying : 1:net-snmp-libs-5.5-60.el6_10.2.x86_64 1/4
Verifying : 1:net-snmp-utils-5.5-60.el6_10.2.x86_64 2/4
Verifying : 1:net-snmp-5.5-60.el6_10.2.x86_64 3/4
Verifying : lm_sensors-libs-3.1.1-17.el6.x86_64 4/4